"""Тесты применения миграций локальной базы данных."""

from pathlib import Path
from tempfile import TemporaryDirectory
from unittest import TestCase

from db.db import Database


class MigrationTestCase(TestCase):
    """Проверяет миграцию связи Redmine с активностями Clockify."""

    def test_migration_creates_one_to_many_relation_and_runs_once(self):
        """Миграция переносит связь и не выполняется повторно."""
        with TemporaryDirectory() as directory:
            db_path = Path(directory) / "tracker.db"
            db = Database(str(db_path), "config/RedmineTracker.sql")

            db.run_migrations("migrations")
            db.run_migrations("migrations")

            activity_columns = {
                row[1]
                for row in db.cursor.execute("PRAGMA table_info(activity)").fetchall()
            }
            time_entry_columns = {
                row[1]
                for row in db.cursor.execute("PRAGMA table_info(time_entry)").fetchall()
            }
            migration = db.cursor.execute(
                "SELECT name, executed_at FROM migration"
            ).fetchall()
            activity_foreign_keys = {
                row[3]: row[2]
                for row in db.cursor.execute(
                    "PRAGMA foreign_key_list(activity)"
                ).fetchall()
            }

            self.assertIn("time_entry_id", activity_columns)
            self.assertNotIn("activity_id", time_entry_columns)
            self.assertEqual(activity_foreign_keys["time_entry_id"], "time_entry")
            self.assertEqual(len(migration), 1)
            self.assertEqual(
                migration[0][0],
                "a7f3c9e1_redmine_clockify_relation.py",
            )
            self.assertIsNotNone(migration[0][1])
            db.con.close()

    def test_multiple_activities_can_reference_one_time_entry(self):
        """Несколько активностей Clockify могут ссылаться на одну запись Redmine."""
        with TemporaryDirectory() as directory:
            db_path = Path(directory) / "tracker.db"
            db = Database(str(db_path), "config/RedmineTracker.sql")
            db.run_migrations("migrations")
            db.cursor.execute("PRAGMA foreign_keys = OFF")
            db.cursor.execute(
                """INSERT INTO time_entry(
                       id, description, date, time_spent,
                       task_id, activity_type_id, author_id
                   ) VALUES(42, 'Работа', '2026-07-14', 1, 51906, 9, 1)"""
            )
            for activity_id in ("first", "second"):
                db.cursor.execute(
                    """INSERT INTO activity(
                           id, description, author_id, time_spent, date_start,
                           tag_id, time_entry_id
                       ) VALUES(?, 'Работа', 1, 0.5, '2026-07-14', 'tag', 42)""",
                    (activity_id,),
                )

            count = db.cursor.execute(
                "SELECT COUNT(*) FROM activity WHERE time_entry_id = 42"
            ).fetchone()[0]

            self.assertEqual(count, 2)
            db.con.close()