"""Tests for web/api.py — new task endpoints (pipeline, approve, reject, full)."""

import pytest
from pathlib import Path
from fastapi.testclient import TestClient

# Patch DB_PATH before importing app
import web.api as api_module

@pytest.fixture
def client(tmp_path):
    db_path = tmp_path / "test.db"
    api_module.DB_PATH = db_path
    from web.api import app
    c = TestClient(app)
    # Seed data
    c.post("/api/projects", json={"id": "p1", "name": "P1", "path": "/p1"})
    c.post("/api/tasks", json={"project_id": "p1", "title": "Fix bug"})
    return c


def test_get_task(client):
    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    assert r.json()["title"] == "Fix bug"


def test_get_task_not_found(client):
    r = client.get("/api/tasks/NOPE")
    assert r.status_code == 404


def test_task_pipeline_empty(client):
    r = client.get("/api/tasks/P1-001/pipeline")
    assert r.status_code == 200
    assert r.json() == []


def test_task_pipeline_with_logs(client):
    # Insert agent logs directly
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.log_agent_run(conn, "p1", "debugger", "execute",
                         task_id="P1-001", output_summary="Found bug",
                         tokens_used=1000, duration_seconds=5, success=True)
    models.log_agent_run(conn, "p1", "tester", "execute",
                         task_id="P1-001", output_summary="Tests pass",
                         tokens_used=500, duration_seconds=3, success=True)
    conn.close()

    r = client.get("/api/tasks/P1-001/pipeline")
    assert r.status_code == 200
    steps = r.json()
    assert len(steps) == 2
    assert steps[0]["agent_role"] == "debugger"
    assert steps[0]["output_summary"] == "Found bug"
    assert steps[1]["agent_role"] == "tester"


def test_task_full(client):
    r = client.get("/api/tasks/P1-001/full")
    assert r.status_code == 200
    data = r.json()
    assert data["id"] == "P1-001"
    assert "pipeline_steps" in data
    assert "related_decisions" in data


def test_task_full_not_found(client):
    r = client.get("/api/tasks/NOPE/full")
    assert r.status_code == 404


def test_approve_task(client):
    # First set task to review
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="review")
    conn.close()

    r = client.post("/api/tasks/P1-001/approve", json={})
    assert r.status_code == 200
    assert r.json()["status"] == "done"

    # Verify task is done
    r = client.get("/api/tasks/P1-001")
    assert r.json()["status"] == "done"


def test_approve_with_decision(client):
    r = client.post("/api/tasks/P1-001/approve", json={
        "decision_title": "Use AbortController",
        "decision_description": "Fix race condition with AbortController",
        "decision_type": "decision",
    })
    assert r.status_code == 200
    assert r.json()["decision"] is not None
    assert r.json()["decision"]["title"] == "Use AbortController"


def test_approve_not_found(client):
    r = client.post("/api/tasks/NOPE/approve", json={})
    assert r.status_code == 404


def test_approve_fires_task_done_hooks(client):
    """Ручной апрув задачи должен вызывать хуки с event='task_done'."""
    from unittest.mock import patch
    with patch("core.hooks.run_hooks") as mock_hooks:
        mock_hooks.return_value = []
        r = client.post("/api/tasks/P1-001/approve", json={})
    assert r.status_code == 200
    events_fired = [call[1].get("event") or call[0][3]
                    for call in mock_hooks.call_args_list]
    assert "task_done" in events_fired


def test_reject_task(client):
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="review")
    conn.close()

    r = client.post("/api/tasks/P1-001/reject", json={
        "reason": "Didn't fix the root cause"
    })
    assert r.status_code == 200
    assert r.json()["status"] == "pending"

    # Verify task is pending with review reason
    r = client.get("/api/tasks/P1-001")
    data = r.json()
    assert data["status"] == "pending"
    assert data["review"]["rejected"] == "Didn't fix the root cause"


def test_reject_not_found(client):
    r = client.post("/api/tasks/NOPE/reject", json={"reason": "bad"})
    assert r.status_code == 404


def test_task_pipeline_not_found(client):
    r = client.get("/api/tasks/NOPE/pipeline")
    assert r.status_code == 404


def test_running_endpoint_no_pipeline(client):
    r = client.get("/api/tasks/P1-001/running")
    assert r.status_code == 200
    assert r.json()["running"] is False


def test_running_endpoint_with_pipeline(client):
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.create_pipeline(conn, "P1-001", "p1", "debug",
                           [{"role": "debugger"}])
    conn.close()

    r = client.get("/api/tasks/P1-001/running")
    assert r.status_code == 200
    assert r.json()["running"] is True


def test_running_endpoint_not_found(client):
    r = client.get("/api/tasks/NOPE/running")
    assert r.status_code == 404


def test_run_sets_in_progress(client):
    """POST /run should set task to in_progress immediately."""
    r = client.post("/api/tasks/P1-001/run")
    assert r.status_code == 202

    r = client.get("/api/tasks/P1-001")
    assert r.json()["status"] == "in_progress"


def test_run_not_found(client):
    r = client.post("/api/tasks/NOPE/run")
    assert r.status_code == 404


def test_run_kin_038_without_allow_write(client):
    """Регрессионный тест KIN-038: allow_write удалён из схемы,
    эндпоинт принимает запросы с пустым телом без этого параметра."""
    r = client.post("/api/tasks/P1-001/run", json={})
    assert r.status_code == 202


def test_run_with_empty_body(client):
    """POST /run with empty JSON body should be accepted."""
    r = client.post("/api/tasks/P1-001/run", json={})
    assert r.status_code == 202


def test_run_without_body(client):
    """POST /run without body should be backwards-compatible."""
    r = client.post("/api/tasks/P1-001/run")
    assert r.status_code == 202


def test_project_summary_includes_review(client):
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="review")
    conn.close()

    r = client.get("/api/projects")
    projects = r.json()
    assert projects[0]["review_tasks"] == 1


def test_audit_not_found(client):
    r = client.post("/api/projects/NOPE/audit")
    assert r.status_code == 404


def test_audit_apply(client):
    """POST /audit/apply should mark tasks as done."""
    r = client.post("/api/projects/p1/audit/apply",
                    json={"task_ids": ["P1-001"]})
    assert r.status_code == 200
    assert r.json()["count"] == 1
    assert "P1-001" in r.json()["updated"]

    # Verify task is done
    r = client.get("/api/tasks/P1-001")
    assert r.json()["status"] == "done"


def test_audit_apply_not_found(client):
    r = client.post("/api/projects/NOPE/audit/apply",
                    json={"task_ids": ["P1-001"]})
    assert r.status_code == 404


def test_audit_apply_wrong_project(client):
    """Tasks not belonging to the project should be skipped."""
    r = client.post("/api/projects/p1/audit/apply",
                    json={"task_ids": ["WRONG-001"]})
    assert r.status_code == 200
    assert r.json()["count"] == 0


# ---------------------------------------------------------------------------
# PATCH /api/tasks/{task_id} — смена статуса
# ---------------------------------------------------------------------------

def test_patch_task_status(client):
    """PATCH должен обновить статус и вернуть задачу."""
    r = client.patch("/api/tasks/P1-001", json={"status": "review"})
    assert r.status_code == 200
    data = r.json()
    assert data["status"] == "review"
    assert data["id"] == "P1-001"


def test_patch_task_status_persisted(client):
    """После PATCH повторный GET должен возвращать новый статус."""
    client.patch("/api/tasks/P1-001", json={"status": "blocked"})
    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    assert r.json()["status"] == "blocked"


@pytest.mark.parametrize("status", ["pending", "in_progress", "review", "done", "blocked", "decomposed", "cancelled"])
def test_patch_task_all_valid_statuses(client, status):
    """Все 7 допустимых статусов должны приниматься (включая decomposed)."""
    r = client.patch("/api/tasks/P1-001", json={"status": status})
    assert r.status_code == 200
    assert r.json()["status"] == status


def test_patch_task_status_decomposed(client):
    """Регрессионный тест KIN-033: API принимает статус 'decomposed'."""
    r = client.patch("/api/tasks/P1-001", json={"status": "decomposed"})
    assert r.status_code == 200
    assert r.json()["status"] == "decomposed"


def test_patch_task_status_decomposed_persisted(client):
    """После установки 'decomposed' повторный GET возвращает этот статус."""
    client.patch("/api/tasks/P1-001", json={"status": "decomposed"})
    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    assert r.json()["status"] == "decomposed"


# ---------------------------------------------------------------------------
# KIN-033 — единый источник истины для статусов
# ---------------------------------------------------------------------------

def test_api_valid_statuses_match_models():
    """API использует models.VALID_TASK_STATUSES как единственный источник истины."""
    from core import models
    import web.api as api_module
    assert api_module.VALID_STATUSES == set(models.VALID_TASK_STATUSES)


def test_cli_valid_statuses_match_models():
    """CLI использует models.VALID_TASK_STATUSES как единственный источник истины."""
    from core import models
    from cli.main import task_update
    status_param = next(p for p in task_update.params if p.name == "status")
    cli_choices = set(status_param.type.choices)
    assert cli_choices == set(models.VALID_TASK_STATUSES)


def test_cli_and_api_statuses_are_identical():
    """Список статусов в CLI и API идентичен."""
    from core import models
    import web.api as api_module
    from cli.main import task_update
    status_param = next(p for p in task_update.params if p.name == "status")
    cli_choices = set(status_param.type.choices)
    assert cli_choices == api_module.VALID_STATUSES
    assert "decomposed" in cli_choices
    assert "decomposed" in api_module.VALID_STATUSES


def test_patch_task_invalid_status(client):
    """Недопустимый статус → 400."""
    r = client.patch("/api/tasks/P1-001", json={"status": "flying"})
    assert r.status_code == 400


def test_patch_task_not_found(client):
    """Несуществующая задача → 404."""
    r = client.patch("/api/tasks/NOPE-999", json={"status": "done"})
    assert r.status_code == 404


def test_patch_task_empty_body_returns_400(client):
    """PATCH с пустым телом (нет status и нет execution_mode) → 400."""
    r = client.patch("/api/tasks/P1-001", json={})
    assert r.status_code == 400


def test_patch_task_execution_mode_auto_complete_accepted(client):
    """KIN-063: execution_mode='auto_complete' принимается (200)."""
    r = client.patch("/api/tasks/P1-001", json={"execution_mode": "auto_complete"})
    assert r.status_code == 200
    assert r.json()["execution_mode"] == "auto_complete"


def test_patch_task_execution_mode_auto_rejected(client):
    """KIN-063: старое значение 'auto' должно отклоняться (400) — Decision #29."""
    r = client.patch("/api/tasks/P1-001", json={"execution_mode": "auto"})
    assert r.status_code == 400


# ---------------------------------------------------------------------------
# KIN-022 — blocked_reason: регрессионные тесты
# ---------------------------------------------------------------------------

def test_blocked_reason_saved_and_returned(client):
    """При переходе в blocked с blocked_reason поле сохраняется и отдаётся в GET."""
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="blocked",
                       blocked_reason="Step 1/2 (debugger) failed")
    conn.close()

    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    data = r.json()
    assert data["status"] == "blocked"
    assert data["blocked_reason"] == "Step 1/2 (debugger) failed"


def test_blocked_reason_present_in_full(client):
    """blocked_reason также присутствует в /full эндпоинте."""
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="blocked",
                       blocked_reason="tester agent crashed")
    conn.close()

    r = client.get("/api/tasks/P1-001/full")
    assert r.status_code == 200
    data = r.json()
    assert data["status"] == "blocked"
    assert data["blocked_reason"] == "tester agent crashed"


def test_blocked_reason_none_by_default(client):
    """Новая задача не имеет blocked_reason."""
    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    data = r.json()
    assert data["blocked_reason"] is None


def test_blocked_without_reason_allowed(client):
    """Переход в blocked без причины допустим (reason=None)."""
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="blocked")
    conn.close()

    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    data = r.json()
    assert data["status"] == "blocked"
    assert data["blocked_reason"] is None


def test_blocked_reason_cleared_on_retry(client):
    """При повторном запуске (статус pending) blocked_reason сбрасывается."""
    from core.db import init_db
    from core import models
    conn = init_db(api_module.DB_PATH)
    models.update_task(conn, "P1-001", status="blocked",
                       blocked_reason="failed once")
    models.update_task(conn, "P1-001", status="pending", blocked_reason=None)
    conn.close()

    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    data = r.json()
    assert data["status"] == "pending"
    assert data["blocked_reason"] is None


# ---------------------------------------------------------------------------
# KIN-029 — DELETE /api/projects/{project_id}/decisions/{decision_id}
# ---------------------------------------------------------------------------

def test_delete_decision_ok(client):
    """Создаём decision через POST, удаляем DELETE → 200 с телом {"deleted": id}."""
    r = client.post("/api/decisions", json={
        "project_id": "p1",
        "type": "decision",
        "title": "Use SQLite",
        "description": "Chosen for simplicity",
    })
    assert r.status_code == 200
    decision_id = r.json()["id"]

    r = client.delete(f"/api/projects/p1/decisions/{decision_id}")
    assert r.status_code == 200
    assert r.json() == {"deleted": decision_id}

    r = client.get("/api/decisions?project=p1")
    assert r.status_code == 200
    ids = [d["id"] for d in r.json()]
    assert decision_id not in ids


def test_delete_decision_not_found(client):
    """DELETE несуществующего decision → 404."""
    r = client.delete("/api/projects/p1/decisions/99999")
    assert r.status_code == 404


def test_delete_decision_wrong_project(client):
    """DELETE decision с чужим project_id → 404 (не раскрываем существование)."""
    r = client.post("/api/decisions", json={
        "project_id": "p1",
        "type": "decision",
        "title": "Cross-project check",
        "description": "Should not be deletable from p2",
    })
    assert r.status_code == 200
    decision_id = r.json()["id"]

    r = client.delete(f"/api/projects/p2/decisions/{decision_id}")
    assert r.status_code == 404

    # Decision должен остаться нетронутым
    r = client.get("/api/decisions?project=p1")
    ids = [d["id"] for d in r.json()]
    assert decision_id in ids


# ---------------------------------------------------------------------------
# KIN-035 — регрессионный тест: смена статуса на cancelled
# ---------------------------------------------------------------------------

def test_patch_task_status_cancelled(client):
    """Регрессионный тест KIN-035: PATCH /api/tasks/{id} с status='cancelled' → 200."""
    r = client.patch("/api/tasks/P1-001", json={"status": "cancelled"})
    assert r.status_code == 200
    assert r.json()["status"] == "cancelled"


def test_patch_task_status_cancelled_persisted(client):
    """После установки 'cancelled' повторный GET возвращает этот статус."""
    client.patch("/api/tasks/P1-001", json={"status": "cancelled"})
    r = client.get("/api/tasks/P1-001")
    assert r.status_code == 200
    assert r.json()["status"] == "cancelled"


def test_cancelled_in_valid_statuses():
    """'cancelled' присутствует в VALID_TASK_STATUSES модели и в VALID_STATUSES API."""
    from core import models
    import web.api as api_module
    assert "cancelled" in models.VALID_TASK_STATUSES
    assert "cancelled" in api_module.VALID_STATUSES


# ---------------------------------------------------------------------------
# KIN-036 — регрессионный тест: --allow-write всегда в команде через web API
# ---------------------------------------------------------------------------

def test_run_always_includes_allow_write_when_body_false(client):
    """Регрессионный тест KIN-036: --allow-write присутствует в команде,
    даже если allow_write=False в теле запроса.

    Баг: условие `if body and body.allow_write` не добавляло флаг при
    allow_write=False, что приводило к блокировке агента на 300 с."""
    from unittest.mock import patch, MagicMock
    with patch("web.api.subprocess.Popen") as mock_popen:
        mock_proc = MagicMock()
        mock_proc.pid = 12345
        mock_popen.return_value = mock_proc

        r = client.post("/api/tasks/P1-001/run", json={"allow_write": False})
        assert r.status_code == 202

        cmd = mock_popen.call_args[0][0]
        assert "--allow-write" in cmd, (
            "--allow-write обязан присутствовать всегда: без него агент зависает "
            "при попытке записи, потому что stdin=DEVNULL и нет интерактивного подтверждения"
        )


def test_run_always_includes_allow_write_without_body(client):
    """Регрессионный тест KIN-036: --allow-write присутствует даже без тела запроса."""
    from unittest.mock import patch, MagicMock
    with patch("web.api.subprocess.Popen") as mock_popen:
        mock_proc = MagicMock()
        mock_proc.pid = 12345
        mock_popen.return_value = mock_proc

        r = client.post("/api/tasks/P1-001/run")
        assert r.status_code == 202

        cmd = mock_popen.call_args[0][0]
        assert "--allow-write" in cmd


def test_run_sets_kin_noninteractive_env(client):
    """Регрессионный тест KIN-036: KIN_NONINTERACTIVE=1 всегда устанавливается
    при запуске через web API, что вместе с --allow-write предотвращает зависание."""
    from unittest.mock import patch, MagicMock
    with patch("web.api.subprocess.Popen") as mock_popen:
        mock_proc = MagicMock()
        mock_proc.pid = 99
        mock_popen.return_value = mock_proc

        r = client.post("/api/tasks/P1-001/run")
        assert r.status_code == 202

        call_kwargs = mock_popen.call_args[1]
        env = call_kwargs.get("env", {})
        assert env.get("KIN_NONINTERACTIVE") == "1"


def test_run_sets_stdin_devnull(client):
    """Регрессионный тест KIN-036: stdin=DEVNULL всегда устанавливается,
    что является причиной, по которой --allow-write обязателен."""
    import subprocess as _subprocess
    from unittest.mock import patch, MagicMock
    with patch("web.api.subprocess.Popen") as mock_popen:
        mock_proc = MagicMock()
        mock_proc.pid = 42
        mock_popen.return_value = mock_proc

        r = client.post("/api/tasks/P1-001/run")
        assert r.status_code == 202

        call_kwargs = mock_popen.call_args[1]
        assert call_kwargs.get("stdin") == _subprocess.DEVNULL


# ---------------------------------------------------------------------------
# KIN-040 — регрессионные тесты: удаление TaskRun / allow_write из схемы
# ---------------------------------------------------------------------------

def test_run_kin_040_no_taskrun_class():
    """Регрессионный тест KIN-040: класс TaskRun удалён из web/api.py.
    allow_write больше не является частью схемы эндпоинта /run."""
    import web.api as api_module
    assert not hasattr(api_module, "TaskRun"), (
        "Класс TaskRun должен быть удалён из web/api.py (KIN-040)"
    )


def test_run_kin_040_allow_write_true_ignored(client):
    """Регрессионный тест KIN-040: allow_write=True в теле игнорируется (не 422).
    Эндпоинт не имеет body-параметра, поэтому FastAPI не валидирует тело."""
    r = client.post("/api/tasks/P1-001/run", json={"allow_write": True})
    assert r.status_code == 202


# ---------------------------------------------------------------------------
# KIN-058 — регрессионный тест: stderr=DEVNULL у Popen в web API
# ---------------------------------------------------------------------------

def test_run_sets_stderr_devnull(client):
    """Регрессионный тест KIN-058: stderr=DEVNULL всегда устанавливается в Popen,
    чтобы stderr дочернего процесса не загрязнял логи uvicorn."""
    import subprocess as _subprocess
    from unittest.mock import patch, MagicMock
    with patch("web.api.subprocess.Popen") as mock_popen:
        mock_proc = MagicMock()
        mock_proc.pid = 77
        mock_popen.return_value = mock_proc

        r = client.post("/api/tasks/P1-001/run")
        assert r.status_code == 202

        call_kwargs = mock_popen.call_args[1]
        assert call_kwargs.get("stderr") == _subprocess.DEVNULL, (
            "Регрессия KIN-058: stderr у Popen должен быть DEVNULL, "
            "иначе вывод агента попадает в логи uvicorn"
        )