"""Tests for core/models.py — all functions, in-memory SQLite."""

import re
import pytest
from unittest.mock import patch
from core.db import init_db
from core import models
from core.models import TASK_CATEGORIES


@pytest.fixture
def conn():
    """Fresh in-memory DB for each test."""
    c = init_db(db_path=":memory:")
    yield c
    c.close()


# -- Projects --

def test_create_and_get_project(conn):
    p = models.create_project(conn, "vdol", "В долю поперёк", "~/projects/vdolipoperek",
                              tech_stack=["vue3", "nuxt"])
    assert p["id"] == "vdol"
    assert p["tech_stack"] == ["vue3", "nuxt"]
    assert p["status"] == "active"

    fetched = models.get_project(conn, "vdol")
    assert fetched["name"] == "В долю поперёк"


def test_get_project_not_found(conn):
    assert models.get_project(conn, "nope") is None


def test_list_projects_filter(conn):
    models.create_project(conn, "a", "A", "/a", status="active")
    models.create_project(conn, "b", "B", "/b", status="paused")
    models.create_project(conn, "c", "C", "/c", status="active")

    assert len(models.list_projects(conn)) == 3
    assert len(models.list_projects(conn, status="active")) == 2
    assert len(models.list_projects(conn, status="paused")) == 1


def test_update_project(conn):
    models.create_project(conn, "x", "X", "/x", priority=5)
    updated = models.update_project(conn, "x", priority=1, status="maintenance")
    assert updated["priority"] == 1
    assert updated["status"] == "maintenance"


def test_update_project_tech_stack_json(conn):
    models.create_project(conn, "x", "X", "/x", tech_stack=["python"])
    updated = models.update_project(conn, "x", tech_stack=["python", "fastapi"])
    assert updated["tech_stack"] == ["python", "fastapi"]


# -- project_type and SSH fields (KIN-071) --

def test_create_operations_project(conn):
    """KIN-071: operations project stores SSH fields. KIN-ARCH-005: path не передаётся."""
    p = models.create_project(
        conn, "srv1", "My Server",
        project_type="operations",
        ssh_host="10.0.0.1",
        ssh_user="root",
        ssh_key_path="~/.ssh/id_rsa",
        ssh_proxy_jump="jumpt",
    )
    assert p["project_type"] == "operations"
    assert p["ssh_host"] == "10.0.0.1"
    assert p["ssh_user"] == "root"
    assert p["ssh_key_path"] == "~/.ssh/id_rsa"
    assert p["ssh_proxy_jump"] == "jumpt"
    assert p["path"] is None


def test_create_development_project_defaults(conn):
    """KIN-071: development is default project_type."""
    p = models.create_project(conn, "devp", "Dev Project", "/path")
    assert p["project_type"] == "development"
    assert p["ssh_host"] is None


def test_update_project_ssh_fields(conn):
    """KIN-071: update_project can set SSH fields."""
    models.create_project(conn, "srv2", "Server 2", project_type="operations")
    updated = models.update_project(conn, "srv2", ssh_host="192.168.1.1", ssh_user="pelmen")
    assert updated["ssh_host"] == "192.168.1.1"
    assert updated["ssh_user"] == "pelmen"
    assert updated["path"] is None


# ---------------------------------------------------------------------------
# KIN-ARCH-003 — path nullable для operations-проектов
# Исправляет баг: workaround с пустой строкой ("") для operations-проектов
# ---------------------------------------------------------------------------

def test_kin_arch_003_operations_project_without_path_stores_null(conn):
    """KIN-ARCH-003: operations-проект без path сохраняется с path=NULL, не пустой строкой.

    До фикса: workaround — передавать path='' чтобы обойти NOT NULL constraint.
    После фикса: path=None (NULL в БД) допустим для operations-проектов.
    """
    p = models.create_project(
        conn, "ops_null", "Ops Null Path",
        project_type="operations",
        ssh_host="10.0.0.1",
    )
    assert p["path"] is None, (
        "KIN-ARCH-003 регрессия: path должен быть NULL, а не пустой строкой"
    )


def test_kin_arch_003_check_constraint_rejects_null_path_for_development(conn):
    """KIN-ARCH-003: CHECK constraint (path IS NOT NULL OR project_type='operations')
    отклоняет path=NULL для development-проектов."""
    import sqlite3 as _sqlite3
    with pytest.raises(_sqlite3.IntegrityError):
        models.create_project(
            conn, "dev_no_path", "Dev No Path",
            path=None, project_type="development",
        )


# -- validate_completion_mode (KIN-063) --

def test_validate_completion_mode_valid_auto_complete():
    """validate_completion_mode принимает 'auto_complete'."""
    assert models.validate_completion_mode("auto_complete") == "auto_complete"


def test_validate_completion_mode_valid_review():
    """validate_completion_mode принимает 'review'."""
    assert models.validate_completion_mode("review") == "review"


def test_validate_completion_mode_invalid_fallback():
    """validate_completion_mode возвращает 'review' для невалидных значений (фоллбэк)."""
    assert models.validate_completion_mode("auto") == "review"
    assert models.validate_completion_mode("") == "review"
    assert models.validate_completion_mode("unknown") == "review"


# -- get_effective_mode (KIN-063) --

def test_get_effective_mode_task_overrides_project(conn):
    """Task execution_mode имеет приоритет над project execution_mode."""
    models.create_project(conn, "p1", "P1", "/p1", execution_mode="review")
    models.create_task(conn, "P1-001", "p1", "Task", execution_mode="auto_complete")
    mode = models.get_effective_mode(conn, "p1", "P1-001")
    assert mode == "auto_complete"


def test_get_effective_mode_falls_back_to_project(conn):
    """Если задача без execution_mode — применяется project execution_mode."""
    models.create_project(conn, "p1", "P1", "/p1", execution_mode="auto_complete")
    models.create_task(conn, "P1-001", "p1", "Task")  # execution_mode=None
    mode = models.get_effective_mode(conn, "p1", "P1-001")
    assert mode == "auto_complete"


def test_get_effective_mode_project_review_overrides_default(conn):
    """Project execution_mode='review' + task без override → возвращает 'review'.

    Сценарий: PM хотел auto_complete, но проект настроен на review человеком.
    get_effective_mode должен вернуть project-level 'review'.
    """
    models.create_project(conn, "p1", "P1", "/p1", execution_mode="review")
    models.create_task(conn, "P1-001", "p1", "Task")  # нет task-level override
    mode = models.get_effective_mode(conn, "p1", "P1-001")
    assert mode == "review"


# -- Tasks --

def test_create_and_get_task(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    t = models.create_task(conn, "P1-001", "p1", "Fix bug",
                           brief={"summary": "broken login"})
    assert t["id"] == "P1-001"
    assert t["brief"] == {"summary": "broken login"}
    assert t["status"] == "pending"


def test_list_tasks_filters(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_project(conn, "p2", "P2", "/p2")
    models.create_task(conn, "P1-001", "p1", "Task A", status="pending")
    models.create_task(conn, "P1-002", "p1", "Task B", status="done")
    models.create_task(conn, "P2-001", "p2", "Task C", status="pending")

    assert len(models.list_tasks(conn)) == 3
    assert len(models.list_tasks(conn, project_id="p1")) == 2
    assert len(models.list_tasks(conn, status="pending")) == 2
    assert len(models.list_tasks(conn, project_id="p1", status="done")) == 1


def test_update_task(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task")
    updated = models.update_task(conn, "P1-001", status="in_progress",
                                 spec={"steps": [1, 2, 3]})
    assert updated["status"] == "in_progress"
    assert updated["spec"] == {"steps": [1, 2, 3]}
    assert updated["updated_at"] is not None


def test_subtask(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Parent")
    child = models.create_task(conn, "P1-001a", "p1", "Child",
                               parent_task_id="P1-001")
    assert child["parent_task_id"] == "P1-001"


# -- Decisions --

def test_add_and_get_decisions(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    d = models.add_decision(conn, "p1", "gotcha", "iOS Safari bottom sheet",
                            "position:fixed breaks on iOS Safari",
                            category="ui", tags=["ios-safari", "css"])
    assert d["type"] == "gotcha"
    assert d["tags"] == ["ios-safari", "css"]

    results = models.get_decisions(conn, "p1")
    assert len(results) == 1


def test_decisions_filter_by_category(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "decision", "Use WAL", "perf",
                        category="architecture")
    models.add_decision(conn, "p1", "gotcha", "Safari bug", "css",
                        category="ui")
    assert len(models.get_decisions(conn, "p1", category="ui")) == 1


def test_decisions_filter_by_tags(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "gotcha", "Bug A", "desc",
                        tags=["safari", "css"])
    models.add_decision(conn, "p1", "gotcha", "Bug B", "desc",
                        tags=["chrome", "js"])
    models.add_decision(conn, "p1", "gotcha", "Bug C", "desc",
                        tags=["safari", "js"])

    assert len(models.get_decisions(conn, "p1", tags=["safari"])) == 2
    assert len(models.get_decisions(conn, "p1", tags=["js"])) == 2
    assert len(models.get_decisions(conn, "p1", tags=["css"])) == 1


def test_decisions_filter_by_types(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "decision", "A", "a")
    models.add_decision(conn, "p1", "gotcha", "B", "b")
    models.add_decision(conn, "p1", "workaround", "C", "c")

    assert len(models.get_decisions(conn, "p1", types=["gotcha", "workaround"])) == 2


def test_decisions_limit(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    for i in range(10):
        models.add_decision(conn, "p1", "decision", f"D{i}", f"desc{i}")
    assert len(models.get_decisions(conn, "p1", limit=3)) == 3


# -- Modules --

def test_add_and_get_modules(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    m = models.add_module(conn, "p1", "search", "frontend", "src/search/",
                          description="Search UI", dependencies=["auth"])
    assert m["name"] == "search"
    assert m["dependencies"] == ["auth"]

    mods = models.get_modules(conn, "p1")
    assert len(mods) == 1


def test_add_module_created_true_for_new_module(conn):
    """KIN-081: add_module возвращает _created=True для нового модуля (INSERT)."""
    models.create_project(conn, "p1", "P1", "/p1")
    m = models.add_module(conn, "p1", "api", "backend", "src/api/")
    assert m["_created"] is True
    assert m["name"] == "api"


def test_add_module_created_false_for_duplicate_name(conn):
    """KIN-081: add_module возвращает _created=False при дублировании по имени (INSERT OR IGNORE).

    UNIQUE constraint — (project_id, name). Второй INSERT с тем же name игнорируется,
    возвращается существующая запись с _created=False.
    """
    models.create_project(conn, "p1", "P1", "/p1")
    m1 = models.add_module(conn, "p1", "api", "backend", "src/api/")
    assert m1["_created"] is True

    # Same name, different path — should be ignored
    m2 = models.add_module(conn, "p1", "api", "frontend", "src/api-v2/")
    assert m2["_created"] is False
    assert m2["name"] == "api"
    # Only one module in DB
    assert len(models.get_modules(conn, "p1")) == 1


def test_add_module_duplicate_returns_original_row(conn):
    """KIN-081: при дублировании add_module возвращает оригинальную запись (не новые данные)."""
    models.create_project(conn, "p1", "P1", "/p1")
    m1 = models.add_module(conn, "p1", "api", "backend", "src/api/",
                           description="original desc")
    m2 = models.add_module(conn, "p1", "api", "frontend", "src/api-v2/",
                           description="new desc")
    # Should return original row, not updated one
    assert m2["type"] == "backend"
    assert m2["description"] == "original desc"
    assert m2["id"] == m1["id"]


def test_add_module_same_name_different_projects_are_independent(conn):
    """KIN-081: два проекта могут иметь одноимённые модули — UNIQUE per project_id."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_project(conn, "p2", "P2", "/p2")
    m1 = models.add_module(conn, "p1", "api", "backend", "src/api/")
    m2 = models.add_module(conn, "p2", "api", "backend", "src/api/")
    assert m1["_created"] is True
    assert m2["_created"] is True
    assert m1["id"] != m2["id"]


# -- delete_project --

def test_delete_project_removes_project_record(conn):
    """KIN-081: delete_project удаляет запись из таблицы projects."""
    models.create_project(conn, "p1", "P1", "/p1")
    assert models.get_project(conn, "p1") is not None
    models.delete_project(conn, "p1")
    assert models.get_project(conn, "p1") is None


def test_delete_project_cascades_to_related_tables(conn):
    """KIN-081: delete_project удаляет связанные modules, decisions, tasks, agent_logs."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_module(conn, "p1", "api", "backend", "src/api/")
    models.add_decision(conn, "p1", "gotcha", "Bug X", "desc")
    models.create_task(conn, "P1-001", "p1", "Task")
    models.log_agent_run(conn, "p1", "developer", "implement", task_id="P1-001")

    models.delete_project(conn, "p1")

    assert conn.execute("SELECT COUNT(*) FROM modules WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM decisions WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM tasks WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM agent_logs WHERE project_id='p1'").fetchone()[0] == 0


def test_delete_project_nonexistent_does_not_raise(conn):
    """KIN-081: delete_project на несуществующий проект не бросает исключение."""
    models.delete_project(conn, "nonexistent")


def test_delete_project_with_pipeline_and_handoffs(conn):
    """FK bug fix: delete_project не падает при наличии department_handoffs и pipeline_log."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task", status="in_progress")
    pipeline = models.create_pipeline(conn, "P1-001", "p1", "hotfix", [{"role": "backend_dev"}])
    models.create_handoff(conn, pipeline["id"], "P1-001", "engineering")
    models.write_log(conn, pipeline["id"], "test log message")
    models.log_audit_event(conn, "dangerous_skip", task_id="P1-001", project_id="p1")

    # Must not raise OperationalError: FOREIGN KEY constraint failed
    models.delete_project(conn, "p1")

    assert conn.execute("SELECT COUNT(*) FROM department_handoffs").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM pipeline_log").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM audit_log WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM pipelines WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM tasks WHERE project_id='p1'").fetchone()[0] == 0


def test_delete_project_cleans_hooks_and_project_links(conn):
    """FK fix: delete_project удаляет hooks, hook_logs и project_links."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_project(conn, "p2", "P2", "/p2")
    # Create hook and hook_log for p1
    conn.execute(
        "INSERT INTO hooks (project_id, name, event, command) VALUES ('p1', 'h', 'pipeline_completed', 'echo ok')"
    )
    hook_id = conn.execute("SELECT last_insert_rowid()").fetchone()[0]
    conn.execute(
        "INSERT INTO hook_logs (hook_id, project_id, success) VALUES (?, 'p1', 1)", (hook_id,)
    )
    conn.commit()
    models.create_project_link(conn, "p1", "p2", "depends_on")

    models.delete_project(conn, "p1")

    assert conn.execute("SELECT COUNT(*) FROM hooks WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM hook_logs WHERE project_id='p1'").fetchone()[0] == 0
    assert conn.execute("SELECT COUNT(*) FROM project_links WHERE from_project='p1' OR to_project='p1'").fetchone()[0] == 0


# -- Agent Logs --

def test_log_agent_run(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    log = models.log_agent_run(conn, "p1", "developer", "implement",
                               tokens_used=5000, model="sonnet",
                               cost_usd=0.015, duration_seconds=45)
    assert log["agent_role"] == "developer"
    assert log["cost_usd"] == 0.015
    assert log["success"] == 1  # SQLite boolean


def test_count_agent_logs_since_returns_correct_count(conn):
    """count_agent_logs_since возвращает количество логов >= since_iso."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task")
    models.log_agent_run(conn, "p1", "developer", "implement", task_id="P1-001")
    models.log_agent_run(conn, "p1", "reviewer", "review", task_id="P1-001")

    count = models.count_agent_logs_since(conn, "P1-001", "2000-01-01T00:00:00")
    assert count == 2


def test_count_agent_logs_since_filters_by_task_id(conn):
    """count_agent_logs_since не считает логи других задач."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task A")
    models.create_task(conn, "P1-002", "p1", "Task B")
    models.log_agent_run(conn, "p1", "developer", "implement", task_id="P1-001")
    models.log_agent_run(conn, "p1", "developer", "implement", task_id="P1-002")

    assert models.count_agent_logs_since(conn, "P1-001", "2000-01-01T00:00:00") == 1
    assert models.count_agent_logs_since(conn, "P1-002", "2000-01-01T00:00:00") == 1


def test_count_agent_logs_since_excludes_before_cutoff(conn):
    """count_agent_logs_since не считает логи строго до since_iso."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task")
    models.log_agent_run(conn, "p1", "developer", "implement", task_id="P1-001")

    # since_iso в далёком будущем — ни один лог не попадает
    count = models.count_agent_logs_since(conn, "P1-001", "2099-01-01T00:00:00")
    assert count == 0


def test_count_agent_logs_since_empty_returns_zero(conn):
    """count_agent_logs_since возвращает 0 при отсутствии логов."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task")

    count = models.count_agent_logs_since(conn, "P1-001", "2000-01-01T00:00:00")
    assert count == 0


# -- Pipelines --

def test_create_and_update_pipeline(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task")
    pipe = models.create_pipeline(conn, "P1-001", "p1", "feature",
                                  [{"step": "architect"}, {"step": "dev"}])
    assert pipe["status"] == "running"
    assert pipe["steps"] == [{"step": "architect"}, {"step": "dev"}]

    updated = models.update_pipeline(conn, pipe["id"], status="completed",
                                     total_cost_usd=0.05, total_tokens=10000)
    assert updated["status"] == "completed"
    assert updated["completed_at"] is not None


# -- Support --

def test_create_and_list_tickets(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    t = models.create_ticket(conn, "p1", "telegram_bot", "Не работает поиск",
                             client_id="tg:12345", classification="bug")
    assert t["source"] == "telegram_bot"
    assert t["status"] == "new"

    tickets = models.list_tickets(conn, project_id="p1")
    assert len(tickets) == 1

    assert len(models.list_tickets(conn, status="resolved")) == 0


# -- Statistics --

def test_project_summary(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "A", status="done")
    models.create_task(conn, "P1-002", "p1", "B", status="in_progress")
    models.create_task(conn, "P1-003", "p1", "C", status="blocked")

    summary = models.get_project_summary(conn)
    assert len(summary) == 1
    s = summary[0]
    assert s["total_tasks"] == 3
    assert s["done_tasks"] == 1
    assert s["active_tasks"] == 1
    assert s["blocked_tasks"] == 1


def test_cost_summary(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.log_agent_run(conn, "p1", "dev", "implement",
                         cost_usd=0.10, tokens_used=5000)
    models.log_agent_run(conn, "p1", "reviewer", "review",
                         cost_usd=0.05, tokens_used=2000)

    costs = models.get_cost_summary(conn, days=1)
    assert len(costs) == 1
    assert costs[0]["total_cost_usd"] == pytest.approx(0.15)
    assert costs[0]["total_tokens"] == 7000
    assert costs[0]["runs"] == 2


def test_cost_summary_empty(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    assert models.get_cost_summary(conn, days=7) == []


# -- add_decision_if_new --

def test_add_decision_if_new_adds_new_decision(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    d = models.add_decision_if_new(conn, "p1", "gotcha", "Use WAL mode", "description")
    assert d is not None
    assert d["title"] == "Use WAL mode"
    assert d["type"] == "gotcha"


def test_add_decision_if_new_skips_exact_duplicate(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "gotcha", "Use WAL mode", "desc1")
    result = models.add_decision_if_new(conn, "p1", "gotcha", "Use WAL mode", "desc2")
    assert result is None
    # Existing decision not duplicated
    assert len(models.get_decisions(conn, "p1")) == 1


def test_add_decision_if_new_skips_case_insensitive_duplicate(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "decision", "Use UUID for task IDs", "desc")
    result = models.add_decision_if_new(conn, "p1", "decision", "use uuid for task ids", "other desc")
    assert result is None
    assert len(models.get_decisions(conn, "p1")) == 1


def test_add_decision_if_new_allows_same_title_different_type(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "gotcha", "SQLite WAL", "desc")
    result = models.add_decision_if_new(conn, "p1", "convention", "SQLite WAL", "other desc")
    assert result is not None
    assert len(models.get_decisions(conn, "p1")) == 2


def test_add_decision_if_new_skips_whitespace_duplicate(conn):
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "convention", "Run tests after each change", "desc")
    result = models.add_decision_if_new(conn, "p1", "convention", "  Run tests after each change  ", "desc2")
    assert result is None
    assert len(models.get_decisions(conn, "p1")) == 1


# -- next_task_id (KIN-OBS-009) --

def test_next_task_id_with_category_first(conn):
    """Первая задача с category='SEC' → 'VDOL-SEC-001'."""
    models.create_project(conn, "vdol", "VDOL", "/vdol")
    task_id = models.next_task_id(conn, "vdol", category="SEC")
    assert task_id == "VDOL-SEC-001"


def test_next_task_id_with_category_increments(conn):
    """Вторая задача с category='SEC' → 'VDOL-SEC-002'."""
    models.create_project(conn, "vdol", "VDOL", "/vdol")
    models.create_task(conn, "VDOL-SEC-001", "vdol", "Task 1", category="SEC")
    task_id = models.next_task_id(conn, "vdol", category="SEC")
    assert task_id == "VDOL-SEC-002"


def test_next_task_id_category_counters_independent(conn):
    """Счётчики категорий независимы: SEC-002 не влияет на UI-001."""
    models.create_project(conn, "vdol", "VDOL", "/vdol")
    models.create_task(conn, "VDOL-SEC-001", "vdol", "Sec Task 1", category="SEC")
    models.create_task(conn, "VDOL-SEC-002", "vdol", "Sec Task 2", category="SEC")
    task_id = models.next_task_id(conn, "vdol", category="UI")
    assert task_id == "VDOL-UI-001"


def test_next_task_id_without_category_backward_compat(conn):
    """Задача без category → 'VDOL-001' (backward compat)."""
    models.create_project(conn, "vdol", "VDOL", "/vdol")
    task_id = models.next_task_id(conn, "vdol")
    assert task_id == "VDOL-001"


def test_next_task_id_mixed_formats_no_collision(conn):
    """Смешанный проект: счётчики старого и нового форматов не пересекаются."""
    models.create_project(conn, "kin", "KIN", "/kin")
    models.create_task(conn, "KIN-001", "kin", "Old style task")
    models.create_task(conn, "KIN-002", "kin", "Old style task 2")
    # Новый формат с категорией не мешает старому
    cat_id = models.next_task_id(conn, "kin", category="OBS")
    assert cat_id == "KIN-OBS-001"
    # Старый формат не мешает новому
    old_id = models.next_task_id(conn, "kin")
    assert old_id == "KIN-003"


# -- Obsidian sync regex (KIN-OBS-009, решение #75) --

_OBSIDIAN_TASK_PATTERN = re.compile(
    r"^[-*]\s+\[([xX ])\]\s+([A-Z][A-Z0-9]*-(?:[A-Z][A-Z0-9]*-)?\d+)\s+(.+)$"
)


def test_obsidian_regex_matches_old_format():
    """Старый формат KIN-001 матчится."""
    m = _OBSIDIAN_TASK_PATTERN.match("- [x] KIN-001 Fix login bug")
    assert m is not None
    assert m.group(2) == "KIN-001"


def test_obsidian_regex_matches_new_format():
    """Новый формат VDOL-SEC-001 матчится."""
    m = _OBSIDIAN_TASK_PATTERN.match("- [ ] VDOL-SEC-001 Security audit")
    assert m is not None
    assert m.group(2) == "VDOL-SEC-001"


def test_obsidian_regex_matches_obs_format():
    """Формат KIN-OBS-009 матчится (проверяем задачу этой фичи)."""
    m = _OBSIDIAN_TASK_PATTERN.match("* [X] KIN-OBS-009 Task ID по категориям")
    assert m is not None
    assert m.group(2) == "KIN-OBS-009"


def test_obsidian_regex_no_match_lowercase():
    """Нижний регистр не матчится."""
    assert _OBSIDIAN_TASK_PATTERN.match("- [x] proj-001 lowercase id") is None


def test_obsidian_regex_no_match_numeric_prefix():
    """Числовой префикс не матчится."""
    assert _OBSIDIAN_TASK_PATTERN.match("- [x] 123-abc invalid format") is None


def test_obsidian_regex_done_state(conn):
    """Статус done/pending корректно извлекается."""
    m_done = _OBSIDIAN_TASK_PATTERN.match("- [x] KIN-UI-003 Done task")
    m_pending = _OBSIDIAN_TASK_PATTERN.match("- [ ] KIN-UI-004 Pending task")
    assert m_done.group(1) == "x"
    assert m_pending.group(1) == " "


# -- next_task_id для всех 12 категорий (KIN-OBS-009) --

@pytest.mark.parametrize("cat", TASK_CATEGORIES)
def test_next_task_id_all_categories_generate_correct_format(conn, cat):
    """next_task_id генерирует ID формата PROJ-CAT-001 для каждой из 12 категорий."""
    models.create_project(conn, "vdol", "VDOL", "/vdol")
    task_id = models.next_task_id(conn, "vdol", category=cat)
    assert task_id == f"VDOL-{cat}-001"


# -- update_task category не ломает brief (KIN-OBS-009, решение #74) --

def test_update_task_category_preserves_brief(conn):
    """update_task(category=...) не перетирает существующее поле brief."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task", brief={"summary": "important context"})
    updated = models.update_task(conn, "P1-001", category="SEC")
    assert updated["category"] == "SEC"
    assert updated["brief"] == {"summary": "important context"}


def test_update_task_category_preserves_status_and_priority(conn):
    """update_task(category=...) не меняет остальные поля задачи."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-001", "p1", "Task", status="in_progress", priority=3)
    updated = models.update_task(conn, "P1-001", category="UI")
    assert updated["category"] == "UI"
    assert updated["status"] == "in_progress"
    assert updated["priority"] == 3


# -- KIN-ARCH-006: autocommit_enabled и obsidian_vault_path в SCHEMA --

def test_schema_project_has_autocommit_enabled_column(conn):
    """KIN-ARCH-006: таблица projects содержит колонку autocommit_enabled."""
    cols = {r[1] for r in conn.execute("PRAGMA table_info(projects)").fetchall()}
    assert "autocommit_enabled" in cols


def test_schema_project_has_obsidian_vault_path_column(conn):
    """KIN-ARCH-006: таблица projects содержит колонку obsidian_vault_path."""
    cols = {r[1] for r in conn.execute("PRAGMA table_info(projects)").fetchall()}
    assert "obsidian_vault_path" in cols


def test_autocommit_enabled_default_is_zero(conn):
    """KIN-ARCH-006: autocommit_enabled по умолчанию равен 0."""
    models.create_project(conn, "p1", "P1", "/p1")
    p = models.get_project(conn, "p1")
    assert p["autocommit_enabled"] == 0


def test_obsidian_vault_path_default_is_none(conn):
    """KIN-ARCH-006: obsidian_vault_path по умолчанию равен NULL."""
    models.create_project(conn, "p1", "P1", "/p1")
    p = models.get_project(conn, "p1")
    assert p["obsidian_vault_path"] is None


def test_autocommit_enabled_can_be_set_to_one(conn):
    """KIN-ARCH-006: autocommit_enabled можно установить в 1 через update_project."""
    models.create_project(conn, "p1", "P1", "/p1")
    updated = models.update_project(conn, "p1", autocommit_enabled=1)
    assert updated["autocommit_enabled"] == 1


def test_obsidian_vault_path_can_be_set(conn):
    """KIN-ARCH-006: obsidian_vault_path можно установить через update_project."""
    models.create_project(conn, "p1", "P1", "/p1")
    updated = models.update_project(conn, "p1", obsidian_vault_path="/vault/my-notes")
    assert updated["obsidian_vault_path"] == "/vault/my-notes"


# ---------------------------------------------------------------------------
# KIN-090: Task Attachments
# ---------------------------------------------------------------------------

@pytest.fixture
def task_conn(conn):
    """conn with seeded project and task for attachment tests."""
    models.create_project(conn, "prj", "Project", "/tmp/prj")
    models.create_task(conn, "PRJ-001", "prj", "Fix bug")
    return conn


def test_create_attachment_returns_dict(task_conn):
    """KIN-090: create_attachment возвращает dict со всеми полями."""
    att = models.create_attachment(
        task_conn, "PRJ-001", "screenshot.png",
        "/tmp/prj/.kin/attachments/PRJ-001/screenshot.png",
        "image/png", 1024,
    )
    assert att["id"] is not None
    assert att["task_id"] == "PRJ-001"
    assert att["filename"] == "screenshot.png"
    assert att["path"] == "/tmp/prj/.kin/attachments/PRJ-001/screenshot.png"
    assert att["mime_type"] == "image/png"
    assert att["size"] == 1024
    assert att["created_at"] is not None


def test_create_attachment_persists_in_sqlite(task_conn):
    """KIN-090: AC4 — данные вложения персистируются в SQLite."""
    att = models.create_attachment(
        task_conn, "PRJ-001", "bug.png",
        "/tmp/prj/.kin/attachments/PRJ-001/bug.png",
        "image/png", 512,
    )
    fetched = models.get_attachment(task_conn, att["id"])
    assert fetched is not None
    assert fetched["filename"] == "bug.png"
    assert fetched["size"] == 512


def test_list_attachments_empty_for_new_task(task_conn):
    """KIN-090: list_attachments возвращает [] для задачи без вложений."""
    result = models.list_attachments(task_conn, "PRJ-001")
    assert result == []


def test_list_attachments_returns_all_for_task(task_conn):
    """KIN-090: list_attachments возвращает все вложения задачи."""
    models.create_attachment(task_conn, "PRJ-001", "a.png",
                             "/tmp/prj/.kin/attachments/PRJ-001/a.png", "image/png", 100)
    models.create_attachment(task_conn, "PRJ-001", "b.jpg",
                             "/tmp/prj/.kin/attachments/PRJ-001/b.jpg", "image/jpeg", 200)
    result = models.list_attachments(task_conn, "PRJ-001")
    assert len(result) == 2
    filenames = {a["filename"] for a in result}
    assert filenames == {"a.png", "b.jpg"}


def test_list_attachments_isolated_by_task(task_conn):
    """KIN-090: list_attachments не возвращает вложения других задач."""
    models.create_task(task_conn, "PRJ-002", "prj", "Other task")
    models.create_attachment(task_conn, "PRJ-001", "a.png",
                             "/tmp/.kin/PRJ-001/a.png", "image/png", 100)
    models.create_attachment(task_conn, "PRJ-002", "b.png",
                             "/tmp/.kin/PRJ-002/b.png", "image/png", 100)
    assert len(models.list_attachments(task_conn, "PRJ-001")) == 1
    assert len(models.list_attachments(task_conn, "PRJ-002")) == 1


def test_get_attachment_not_found_returns_none(task_conn):
    """KIN-090: get_attachment возвращает None если вложение не найдено."""
    assert models.get_attachment(task_conn, 99999) is None


def test_delete_attachment_returns_true(task_conn):
    """KIN-090: delete_attachment возвращает True при успешном удалении."""
    att = models.create_attachment(task_conn, "PRJ-001", "del.png",
                                   "/tmp/del.png", "image/png", 50)
    assert models.delete_attachment(task_conn, att["id"]) is True
    assert models.get_attachment(task_conn, att["id"]) is None


def test_delete_attachment_not_found_returns_false(task_conn):
    """KIN-090: delete_attachment возвращает False если запись не найдена."""
    assert models.delete_attachment(task_conn, 99999) is False


# ---------------------------------------------------------------------------
# KIN-ARCH-008: test_command на уровне проекта
# ---------------------------------------------------------------------------

def test_schema_project_has_test_command_column(conn):
    """KIN-ARCH-008: таблица projects содержит колонку test_command."""
    cols = {row["name"] for row in conn.execute("PRAGMA table_info(projects)")}
    assert "test_command" in cols


def test_test_command_default_is_null(conn):
    """KIN-101: новый проект без test_command получает NULL (авто-определение фреймворка)."""
    p = models.create_project(conn, "prj_tc", "TC Project", "/tmp/tc")
    assert p["test_command"] is None


def test_test_command_can_be_set(conn):
    """KIN-ARCH-008: update_project сохраняет кастомный test_command."""
    models.create_project(conn, "prj_tc2", "TC Project 2", "/tmp/tc2")
    updated = models.update_project(conn, "prj_tc2", test_command="pytest -v --tb=short")
    assert updated["test_command"] == "pytest -v --tb=short"


# ---------------------------------------------------------------------------
# KIN-084: write_log() и get_pipeline_logs()
# ---------------------------------------------------------------------------

@pytest.fixture
def pipeline_conn(conn):
    """Возвращает (conn, pipeline_id) для тестов write_log / get_pipeline_logs."""
    models.create_project(conn, "plog_proj", "Log Project", "/tmp/plog")
    models.create_task(conn, "PLOG-001", "plog_proj", "Log Task")
    pipe = models.create_pipeline(conn, "PLOG-001", "plog_proj", "feature", [{"role": "dev"}])
    return conn, pipe["id"]


def test_write_log_returns_dict(pipeline_conn):
    """KIN-084: write_log возвращает dict с id, pipeline_id, message, level."""
    db, pid = pipeline_conn
    entry = models.write_log(db, pid, "Pipeline started")
    assert isinstance(entry, dict)
    assert entry["id"] is not None
    assert entry["pipeline_id"] == pid
    assert entry["message"] == "Pipeline started"
    assert entry["level"] == "INFO"
    assert entry["ts"] is not None


def test_write_log_extra_none_gives_null(pipeline_conn):
    """KIN-084: write_log без extra → extra_json=None."""
    db, pid = pipeline_conn
    entry = models.write_log(db, pid, "No extra", extra=None)
    assert entry["extra_json"] is None


def test_write_log_extra_dict_decoded(pipeline_conn):
    """KIN-084: write_log с extra=dict → extra_json декодируется в dict."""
    db, pid = pipeline_conn
    entry = models.write_log(db, pid, "With extra", extra={"role": "dev", "model": "sonnet"})
    assert isinstance(entry["extra_json"], dict)
    assert entry["extra_json"]["role"] == "dev"
    assert entry["extra_json"]["model"] == "sonnet"


def test_write_log_custom_ts_stored_exactly(pipeline_conn):
    """KIN-OBS-025: write_log с ts='...' сохраняет переданный timestamp без изменений (UTC-naive)."""
    db, pid = pipeline_conn
    custom_ts = "2026-03-17T10:00:05"
    entry = models.write_log(db, pid, "PM start: task planning", ts=custom_ts, extra={"role": "pm"})
    assert entry["ts"] == custom_ts


def test_write_log_no_ts_uses_db_default(pipeline_conn):
    """KIN-OBS-025: write_log без ts — таймстемп заполняется БД (не None)."""
    db, pid = pipeline_conn
    entry = models.write_log(db, pid, "Regular entry")
    assert entry["ts"] is not None
    # DB default — UTC-naive ISO string, no timezone suffix
    assert "+" not in entry["ts"]
    assert "Z" not in entry["ts"]


def test_get_pipeline_logs_since_id_zero_returns_all(pipeline_conn):
    """KIN-084: get_pipeline_logs(since_id=0) возвращает все записи."""
    db, pid = pipeline_conn
    models.write_log(db, pid, "Entry 1")
    models.write_log(db, pid, "Entry 2")
    models.write_log(db, pid, "Entry 3")
    logs = models.get_pipeline_logs(db, pid, since_id=0)
    assert len(logs) == 3


def test_get_pipeline_logs_since_id_filters(pipeline_conn):
    """KIN-084: get_pipeline_logs(since_id=N) возвращает только id > N."""
    db, pid = pipeline_conn
    e1 = models.write_log(db, pid, "Entry 1")
    models.write_log(db, pid, "Entry 2")
    models.write_log(db, pid, "Entry 3")
    logs = models.get_pipeline_logs(db, pid, since_id=e1["id"])
    assert len(logs) == 2
    assert all(log["id"] > e1["id"] for log in logs)


def test_get_pipeline_logs_ordered_asc(pipeline_conn):
    """KIN-084: get_pipeline_logs возвращает записи в хронологическом порядке."""
    db, pid = pipeline_conn
    models.write_log(db, pid, "First")
    models.write_log(db, pid, "Second")
    models.write_log(db, pid, "Third")
    logs = models.get_pipeline_logs(db, pid)
    ids = [log["id"] for log in logs]
    assert ids == sorted(ids)


# ---------------------------------------------------------------------------
# KIN-UI-018: Защита от circular references в has_open_children /
#              _check_parent_completion (decision #816, #817)
# ---------------------------------------------------------------------------

def test_circular_reference_protection_has_open_children_returns_false(conn):
    """KIN-UI-018 (decision #816): has_open_children возвращает False при циклической ссылке A→B→A.

    Задачи A и B в статусе 'done' создаются напрямую в БД с взаимными parent_task_id.
    Статус 'done' необходим: рекурсия запускается только для done/cancelled потомков,
    поэтому только с done-задачами цикл реально проходит проверку visited-защиты.
    Ожидаемый результат: False (не True, не RecursionError).
    """
    models.create_project(conn, "p1", "P1", "/p1")
    # Создаём задачи в статусе 'done' — рекурсия проходит через них
    models.create_task(conn, "P1-CYC-A", "p1", "Task A", status="done")
    models.create_task(conn, "P1-CYC-B", "p1", "Task B", status="done")
    # Устанавливаем цикл напрямую в БД, минуя валидацию API
    conn.execute("UPDATE tasks SET parent_task_id = 'P1-CYC-B' WHERE id = 'P1-CYC-A'")
    conn.execute("UPDATE tasks SET parent_task_id = 'P1-CYC-A' WHERE id = 'P1-CYC-B'")
    conn.commit()

    result_a = models.has_open_children(conn, "P1-CYC-A")
    result_b = models.has_open_children(conn, "P1-CYC-B")

    assert result_a is False
    assert result_b is False


def test_circular_reference_protection_check_parent_completion_returns_without_error(conn):
    """KIN-UI-018 (decision #817): _check_parent_completion не падает и не зависает при цикле A→B→A.

    Задачи A и B в статусе 'revising' с взаимными parent_task_id.
    Ожидаемый результат: возврат без RecursionError, статус задач не изменился.
    """
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-CPC-A", "p1", "Task A", status="revising")
    models.create_task(conn, "P1-CPC-B", "p1", "Task B", status="revising")
    # Устанавливаем цикл напрямую в БД
    conn.execute("UPDATE tasks SET parent_task_id = 'P1-CPC-B' WHERE id = 'P1-CPC-A'")
    conn.execute("UPDATE tasks SET parent_task_id = 'P1-CPC-A' WHERE id = 'P1-CPC-B'")
    conn.commit()

    # Не должно бросить RecursionError или зависнуть
    models._check_parent_completion(conn, "P1-CPC-A")
    models._check_parent_completion(conn, "P1-CPC-B")

    # Статусы не изменились — цикл обнаружен и прерван
    task_a = models.get_task(conn, "P1-CPC-A")
    task_b = models.get_task(conn, "P1-CPC-B")
    assert task_a["status"] == "revising"
    assert task_b["status"] == "revising"


# ---------------------------------------------------------------------------
# KIN-UI-020: VALID_TASK_STATUSES — frozenset membership checks
# ---------------------------------------------------------------------------

def test_valid_task_statuses_is_frozenset():
    """KIN-UI-020: VALID_TASK_STATUSES должен быть frozenset, не list."""
    assert isinstance(models.VALID_TASK_STATUSES, frozenset)


@pytest.mark.parametrize("status", [
    "pending", "in_progress", "review", "done",
    "blocked", "decomposed", "cancelled", "revising",
])
def test_valid_task_statuses_membership(status):
    """KIN-UI-020: каждый валидный статус присутствует в VALID_TASK_STATUSES (membership check)."""
    assert status in models.VALID_TASK_STATUSES


def test_invalid_status_not_in_valid_task_statuses():
    """KIN-UI-020: невалидный статус отсутствует в VALID_TASK_STATUSES."""
    assert "invalid_status" not in models.VALID_TASK_STATUSES
    assert "" not in models.VALID_TASK_STATUSES
    assert "active" not in models.VALID_TASK_STATUSES


# ---------------------------------------------------------------------------
# KIN-UI-023: _check_parent_completion — атомарность каскада
# ---------------------------------------------------------------------------

def test_check_parent_completion_happy_path_full_cascade(conn):
    """KIN-UI-023 (happy path): grandchild→child→parent→grandparent — все переходят в done атомарно.

    Иерархия: P1-GRAND (revising) → P1-PAR (revising) → P1-CHILD (revising) → P1-GC (done).
    После _check_parent_completion(P1-GC) все три предка должны стать done за одну транзакцию.
    """
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-GRAND", "p1", "Grandparent", status="revising")
    models.create_task(conn, "P1-PAR", "p1", "Parent", status="revising",
                       parent_task_id="P1-GRAND")
    models.create_task(conn, "P1-CHILD", "p1", "Child", status="revising",
                       parent_task_id="P1-PAR")
    models.create_task(conn, "P1-GC", "p1", "Grandchild", status="done",
                       parent_task_id="P1-CHILD")
    conn.commit()

    models._check_parent_completion(conn, "P1-GC")

    child = models.get_task(conn, "P1-CHILD")
    parent = models.get_task(conn, "P1-PAR")
    grandparent = models.get_task(conn, "P1-GRAND")

    assert child["status"] == "done"
    assert parent["status"] == "done"
    assert grandparent["status"] == "done"
    assert child["completed_at"] is not None
    assert parent["completed_at"] is not None
    assert grandparent["completed_at"] is not None


def test_check_parent_completion_rollback_on_mid_cascade_exception(conn):
    """KIN-UI-023 (atomicity): исключение в середине каскада откатывает все изменения.

    Иерархия: P1-GRAND (revising) → P1-PAR (revising) → P1-CHILD (revising) → P1-GC (done).
    Инжектируем RuntimeError на 2-м вызове has_open_children (при проверке P1-PAR).
    К тому моменту P1-CHILD уже получил UPDATE→done в pending-транзакции.
    После rollback ни один из предков не должен остаться в состоянии done.
    """
    models.create_project(conn, "p1", "P1", "/p1")
    models.create_task(conn, "P1-GRAND", "p1", "Grandparent", status="revising")
    models.create_task(conn, "P1-PAR", "p1", "Parent", status="revising",
                       parent_task_id="P1-GRAND")
    models.create_task(conn, "P1-CHILD", "p1", "Child", status="revising",
                       parent_task_id="P1-PAR")
    models.create_task(conn, "P1-GC", "p1", "Grandchild", status="done",
                       parent_task_id="P1-CHILD")
    conn.commit()

    call_count = [0]
    original_has_open_children = models.has_open_children

    def failing_has_open_children(c, tid, visited=None):
        call_count[0] += 1
        if call_count[0] >= 2:
            raise RuntimeError("Simulated mid-cascade failure")
        return original_has_open_children(c, tid, visited)

    with patch.object(models, "has_open_children", side_effect=failing_has_open_children):
        with pytest.raises(RuntimeError, match="Simulated mid-cascade failure"):
            models._check_parent_completion(conn, "P1-GC")

    # После rollback все предки должны оставаться в revising — БД не в промежуточном состоянии
    child = models.get_task(conn, "P1-CHILD")
    parent = models.get_task(conn, "P1-PAR")
    grandparent = models.get_task(conn, "P1-GRAND")
    assert child["status"] == "revising", "P1-CHILD должен остаться revising после rollback"
    assert parent["status"] == "revising", "P1-PAR должен остаться revising после rollback"
    assert grandparent["status"] == "revising", "P1-GRAND должен остаться revising после rollback"


# ---------------------------------------------------------------------------
# Регрессия: get_decisions — edge case с пустым массивом []
# Баг: `if types:` и `if tags:` не различают None (нет фильтра) и [] (пустой фильтр).
# Пустой список фальшивый в Python → фильтр не применяется → возвращаются ВСЕ записи.
# Ожидаемое поведение: types=[] и tags=[] должны возвращать 0 результатов.
# ---------------------------------------------------------------------------

def test_get_decisions_empty_types_returns_no_results(conn):
    """Регрессия: types=[] должен вернуть 0 решений, а не все.

    Баг: `if types:` фальшивый для [] → фильтр не применяется → возвращаются все решения.
    Правильное поведение: пустой список типов означает «ни один тип не подходит» → 0 результатов.
    """
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "decision", "Решение A", "описание")
    models.add_decision(conn, "p1", "gotcha", "Ловушка B", "описание")

    result = models.get_decisions(conn, "p1", types=[])
    assert result == [], (
        f"types=[] должен вернуть [], получено {len(result)} записей — "
        "регрессия: `if types:` не различает None и []"
    )


def test_get_decisions_empty_tags_returns_no_results(conn):
    """Регрессия: tags=[] должен вернуть 0 решений, а не все.

    Баг: `if tags:` фальшивый для [] → фильтр не применяется → возвращаются все решения.
    Правильное поведение: пустой список тегов означает «ни один тег не подходит» → 0 результатов.
    """
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "gotcha", "Ловушка 1", "desc", tags=["safari", "css"])
    models.add_decision(conn, "p1", "gotcha", "Ловушка 2", "desc", tags=["chrome"])

    result = models.get_decisions(conn, "p1", tags=[])
    assert result == [], (
        f"tags=[] должен вернуть [], получено {len(result)} записей — "
        "регрессия: `if tags:` не различает None и []"
    )


def test_get_decisions_none_types_returns_all(conn):
    """types=None не должен фильтровать — возвращает все решения (нет фильтра)."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "decision", "Решение A", "описание")
    models.add_decision(conn, "p1", "gotcha", "Ловушка B", "описание")

    result = models.get_decisions(conn, "p1", types=None)
    assert len(result) == 2, "types=None должен вернуть все 2 решения"


def test_get_decisions_none_tags_returns_all(conn):
    """tags=None не должен фильтровать — возвращает все решения (нет фильтра)."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "gotcha", "Ловушка 1", "desc", tags=["safari"])
    models.add_decision(conn, "p1", "gotcha", "Ловушка 2", "desc", tags=["chrome"])

    result = models.get_decisions(conn, "p1", tags=None)
    assert len(result) == 2, "tags=None должен вернуть все 2 решения"


def test_get_decisions_empty_types_differs_from_none(conn):
    """types=[] (пустой фильтр → 0 результатов) семантически отличается от types=None (нет фильтра → все)."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "decision", "Решение A", "описание")
    models.add_decision(conn, "p1", "gotcha", "Ловушка B", "описание")

    result_empty = models.get_decisions(conn, "p1", types=[])
    result_none = models.get_decisions(conn, "p1", types=None)

    assert len(result_empty) == 0, "types=[] должен давать 0 результатов"
    assert len(result_none) == 2, "types=None должен давать все 2 результата"


def test_get_decisions_empty_tags_differs_from_none(conn):
    """tags=[] (пустой фильтр → 0 результатов) семантически отличается от tags=None (нет фильтра → все)."""
    models.create_project(conn, "p1", "P1", "/p1")
    models.add_decision(conn, "p1", "gotcha", "Ловушка 1", "desc", tags=["safari"])
    models.add_decision(conn, "p1", "gotcha", "Ловушка 2", "desc", tags=["chrome"])

    result_empty = models.get_decisions(conn, "p1", tags=[])
    result_none = models.get_decisions(conn, "p1", tags=None)

    assert len(result_empty) == 0, "tags=[] должен давать 0 результатов"
    assert len(result_none) == 2, "tags=None должен давать все 2 результата"