"""Tests for core/obsidian_sync.py — KIN-013."""

import sqlite3
import tempfile
from pathlib import Path

import pytest

from core.db import init_db
from core.obsidian_sync import (
    export_decisions_to_md,
    parse_task_checkboxes,
    sync_obsidian,
)
from core import models


# ---------------------------------------------------------------------------
# 0. Migration — obsidian_vault_path column must exist after init_db
# ---------------------------------------------------------------------------

def test_migration_obsidian_vault_path_column_exists():
    """init_db создаёт или мигрирует колонку obsidian_vault_path в таблице projects."""
    conn = init_db(db_path=":memory:")
    cols = {r[1] for r in conn.execute("PRAGMA table_info(projects)").fetchall()}
    conn.close()
    assert "obsidian_vault_path" in cols


@pytest.fixture
def tmp_vault(tmp_path):
    """Returns a temporary vault root directory."""
    return tmp_path / "vault"


@pytest.fixture
def db(tmp_path):
    """Returns an in-memory SQLite connection with schema + test data."""
    db_path = tmp_path / "test.db"
    conn = init_db(db_path)
    models.create_project(conn, "proj1", "Test Project", "/tmp/proj1")
    yield conn
    conn.close()


# ---------------------------------------------------------------------------
# 1. export creates files with correct frontmatter
# ---------------------------------------------------------------------------

def test_export_decisions_creates_md_files(tmp_vault):
    decisions = [
        {
            "id": 42,
            "project_id": "proj1",
            "type": "gotcha",
            "category": "testing",
            "title": "Proxy через SSH не работает без ssh-agent",
            "description": "При подключении через ProxyJump ssh-agent должен быть запущен.",
            "tags": ["testing", "mock", "subprocess"],
            "created_at": "2026-03-10T12:00:00",
        }
    ]
    tmp_vault.mkdir(parents=True)
    created = export_decisions_to_md("proj1", decisions, tmp_vault)

    assert len(created) == 1
    md_file = created[0]
    assert md_file.exists()

    content = md_file.read_text(encoding="utf-8")
    assert "kin_decision_id: 42" in content
    assert "project: proj1" in content
    assert "type: gotcha" in content
    assert "category: testing" in content
    assert "2026-03-10" in content
    assert "# Proxy через SSH не работает без ssh-agent" in content
    assert "При подключении через ProxyJump" in content


# ---------------------------------------------------------------------------
# 2. export is idempotent (overwrite, not duplicate)
# ---------------------------------------------------------------------------

def test_export_idempotent(tmp_vault):
    decisions = [
        {
            "id": 1,
            "project_id": "p",
            "type": "decision",
            "category": None,
            "title": "Use SQLite",
            "description": "SQLite is the source of truth.",
            "tags": [],
            "created_at": "2026-01-01",
        }
    ]
    tmp_vault.mkdir(parents=True)

    export_decisions_to_md("p", decisions, tmp_vault)
    export_decisions_to_md("p", decisions, tmp_vault)

    out_dir = tmp_vault / "p" / "decisions"
    files = list(out_dir.glob("*.md"))
    assert len(files) == 1


# ---------------------------------------------------------------------------
# 3. parse_task_checkboxes — done checkbox
# ---------------------------------------------------------------------------

def test_parse_task_checkboxes_done(tmp_vault):
    tasks_dir = tmp_vault / "proj1" / "tasks"
    tasks_dir.mkdir(parents=True)
    (tasks_dir / "kanban.md").write_text(
        "- [x] KIN-001 Implement login\n- [ ] KIN-002 Add tests\n",
        encoding="utf-8",
    )

    results = parse_task_checkboxes(tmp_vault, "proj1")
    done_items = [r for r in results if r["task_id"] == "KIN-001"]
    assert len(done_items) == 1
    assert done_items[0]["done"] is True
    assert done_items[0]["title"] == "Implement login"


# ---------------------------------------------------------------------------
# 4. parse_task_checkboxes — pending checkbox
# ---------------------------------------------------------------------------

def test_parse_task_checkboxes_pending(tmp_vault):
    tasks_dir = tmp_vault / "proj1" / "tasks"
    tasks_dir.mkdir(parents=True)
    (tasks_dir / "kanban.md").write_text(
        "- [ ] KIN-002 Add tests\n",
        encoding="utf-8",
    )

    results = parse_task_checkboxes(tmp_vault, "proj1")
    pending = [r for r in results if r["task_id"] == "KIN-002"]
    assert len(pending) == 1
    assert pending[0]["done"] is False


# ---------------------------------------------------------------------------
# 5. parse_task_checkboxes — lines without task ID are skipped
# ---------------------------------------------------------------------------

def test_parse_task_checkboxes_no_id(tmp_vault):
    tasks_dir = tmp_vault / "proj1" / "tasks"
    tasks_dir.mkdir(parents=True)
    (tasks_dir / "notes.md").write_text(
        "- [x] Some task without ID\n"
        "- [ ] Another line without identifier\n"
        "- [x] KIN-003 With ID\n",
        encoding="utf-8",
    )

    results = parse_task_checkboxes(tmp_vault, "proj1")
    assert all(r["task_id"].startswith("KIN-") for r in results)
    assert len(results) == 1
    assert results[0]["task_id"] == "KIN-003"


# ---------------------------------------------------------------------------
# 6. sync_obsidian updates task status when done=True
# ---------------------------------------------------------------------------

def test_sync_updates_task_status(db, tmp_vault):
    tmp_vault.mkdir(parents=True)
    models.update_project(db, "proj1", obsidian_vault_path=str(tmp_vault))

    task = models.create_task(db, "PROJ1-001", "proj1", "Do something", status="in_progress")
    assert task["status"] == "in_progress"

    # Write checkbox file
    tasks_dir = tmp_vault / "proj1" / "tasks"
    tasks_dir.mkdir(parents=True)
    (tasks_dir / "sprint.md").write_text(
        "- [x] PROJ1-001 Do something\n",
        encoding="utf-8",
    )

    result = sync_obsidian(db, "proj1")

    assert result["tasks_updated"] == 1
    assert not result["errors"]
    updated = models.get_task(db, "PROJ1-001")
    assert updated["status"] == "done"


# ---------------------------------------------------------------------------
# 7. sync_obsidian raises ValueError when vault_path not set
# ---------------------------------------------------------------------------

def test_sync_no_vault_path(db):
    # project exists but obsidian_vault_path is NULL
    with pytest.raises(ValueError, match="obsidian_vault_path not set"):
        sync_obsidian(db, "proj1")


# ---------------------------------------------------------------------------
# 8. export — frontmatter обёрнут в разделители ---
# ---------------------------------------------------------------------------

def test_export_frontmatter_has_yaml_delimiters(tmp_vault):
    """Экспортированный файл начинается с '---' и содержит закрывающий '---'."""
    decisions = [
        {
            "id": 99,
            "project_id": "p",
            "type": "decision",
            "category": None,
            "title": "YAML Delimiter Test",
            "description": "Verifying frontmatter delimiters.",
            "tags": [],
            "created_at": "2026-01-01",
        }
    ]
    tmp_vault.mkdir(parents=True)
    created = export_decisions_to_md("p", decisions, tmp_vault)
    content = created[0].read_text(encoding="utf-8")

    assert content.startswith("---\n"), "Frontmatter должен начинаться с '---\\n'"
    # первые --- открывают, вторые --- закрывают frontmatter
    parts = content.split("---\n")
    assert len(parts) >= 3, "Должно быть минимум два разделителя '---'"


# ---------------------------------------------------------------------------
# 9. sync_obsidian — несуществующий vault_path → ошибка в errors, не исключение
# ---------------------------------------------------------------------------

def test_sync_nonexistent_vault_records_error(db, tmp_path):
    """Если vault_path не существует, sync возвращает ошибку в errors без raise."""
    nonexistent = tmp_path / "ghost_vault"
    models.update_project(db, "proj1", obsidian_vault_path=str(nonexistent))

    result = sync_obsidian(db, "proj1")

    assert len(result["errors"]) > 0
    assert "does not exist" in result["errors"][0].lower() or "not exist" in result["errors"][0].lower()
    assert result["exported_decisions"] == 0
    assert result["tasks_updated"] == 0


# ---------------------------------------------------------------------------
# 10. sync_obsidian — пустой vault → 0 экспортов, 0 обновлений, нет ошибок
# ---------------------------------------------------------------------------

def test_sync_empty_vault_no_errors(db, tmp_vault):
    """Пустой vault (нет decisions, нет task-файлов) → exported=0, updated=0, errors=[]."""
    tmp_vault.mkdir(parents=True)
    models.update_project(db, "proj1", obsidian_vault_path=str(tmp_vault))

    result = sync_obsidian(db, "proj1")

    assert result["exported_decisions"] == 0
    assert result["tasks_updated"] == 0
    assert result["errors"] == []