#!/usr/bin/env python3
"""
Phase 18 AuditLog Migration Script
===================================
執行 Phase 18 新增字段的數據庫遷移

使用方式:
    cd apps/api && python scripts/run_migration.py
"""

import asyncio
import os

from sqlalchemy import text
from sqlalchemy.ext.asyncio import create_async_engine

# 2026-04-22 ogt: 移除硬碼 changeme，改為讀取環境變數（強制要求設定）。
# 執行前: export DATABASE_URL="postgresql+asyncpg://awoooi:<password>@192.168.0.188:5432/awoooi_prod"
DATABASE_URL = os.environ["DATABASE_URL"]

MIGRATION_SQLS = [
    # 1. authorization_channel
    """
    DO $$
    BEGIN
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns
            WHERE table_name = 'audit_logs' AND column_name = 'authorization_channel'
        ) THEN
            ALTER TABLE audit_logs ADD COLUMN authorization_channel VARCHAR(20);
        END IF;
    END $$;
    """,
    # 2. retry_count
    """
    DO $$
    BEGIN
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns
            WHERE table_name = 'audit_logs' AND column_name = 'retry_count'
        ) THEN
            ALTER TABLE audit_logs ADD COLUMN retry_count INTEGER DEFAULT 0 NOT NULL;
        END IF;
    END $$;
    """,
    # 3. failure_classification
    """
    DO $$
    BEGIN
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns
            WHERE table_name = 'audit_logs' AND column_name = 'failure_classification'
        ) THEN
            ALTER TABLE audit_logs ADD COLUMN failure_classification VARCHAR(50);
        END IF;
    END $$;
    """,
    # 4. source_approval_id
    """
    DO $$
    BEGIN
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns
            WHERE table_name = 'audit_logs' AND column_name = 'source_approval_id'
        ) THEN
            ALTER TABLE audit_logs ADD COLUMN source_approval_id VARCHAR(36);
        END IF;
    END $$;
    """,
    # 5. auto_repair_attempted
    """
    DO $$
    BEGIN
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns
            WHERE table_name = 'audit_logs' AND column_name = 'auto_repair_attempted'
        ) THEN
            ALTER TABLE audit_logs ADD COLUMN auto_repair_attempted BOOLEAN DEFAULT FALSE NOT NULL;
        END IF;
    END $$;
    """,
    # 6. auto_repair_result
    """
    DO $$
    BEGIN
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns
            WHERE table_name = 'audit_logs' AND column_name = 'auto_repair_result'
        ) THEN
            ALTER TABLE audit_logs ADD COLUMN auto_repair_result TEXT;
        END IF;
    END $$;
    """,
    # 創建索引
    "CREATE INDEX IF NOT EXISTS ix_audit_authorization_channel ON audit_logs(authorization_channel);",
    "CREATE INDEX IF NOT EXISTS ix_audit_failure_classification ON audit_logs(failure_classification);",
    "CREATE INDEX IF NOT EXISTS ix_audit_source_approval_id ON audit_logs(source_approval_id);",
]


async def run_migration():
    """執行遷移"""
    print("=" * 60)
    print("Phase 18 AuditLog Migration")
    print("=" * 60)

    engine = create_async_engine(DATABASE_URL, echo=False)

    async with engine.begin() as conn:
        # 執行遷移
        for i, sql in enumerate(MIGRATION_SQLS, 1):
            try:
                await conn.execute(text(sql))
                print(f"✅ Step {i}/{len(MIGRATION_SQLS)} completed")
            except Exception as e:
                print(f"❌ Step {i} failed: {e}")

        # 驗證結果
        print("\n" + "=" * 60)
        print("驗證欄位:")
        print("=" * 60)

        result = await conn.execute(text("""
            SELECT column_name, data_type, is_nullable, column_default
            FROM information_schema.columns
            WHERE table_name = 'audit_logs'
            ORDER BY ordinal_position
        """))

        for row in result:
            print(f"  {row[0]}: {row[1]} (nullable={row[2]}, default={row[3]})")

    await engine.dispose()
    print("\n✅ Migration completed!")


if __name__ == "__main__":
    asyncio.run(run_migration())