#!/usr/bin/env python3
"""
PostgreSQL 테이블 확인 스크립트
distribution-service의 테이블 생성 여부를 확인합니다.
"""

import psycopg2
import sys

# DB 연결 정보
DB_CONFIG = {
    'host': '4.217.133.59',
    'port': 5432,
    'database': 'distributiondb',
    'user': 'eventuser',
    'password': 'Hi5Jessica!'
}

def main():
    try:
        # DB 연결
        print(f"Connecting to database: {DB_CONFIG['host']}:{DB_CONFIG['port']}/{DB_CONFIG['database']}")
        conn = psycopg2.connect(**DB_CONFIG)
        cursor = conn.cursor()

        # 테이블 목록 조회
        print("\n=== Tables in distributiondb ===")
        cursor.execute("""
            SELECT table_name
            FROM information_schema.tables
            WHERE table_schema = 'public'
            ORDER BY table_name
        """)
        tables = cursor.fetchall()

        if not tables:
            print("No tables found.")
        else:
            for table in tables:
                print(f"  - {table[0]}")

        # distribution_status 테이블 구조 확인
        if any('distribution_status' in table for table in tables):
            print("\n=== distribution_status table structure ===")
            cursor.execute("""
                SELECT column_name, data_type, character_maximum_length, is_nullable
                FROM information_schema.columns
                WHERE table_name = 'distribution_status'
                ORDER BY ordinal_position
            """)
            columns = cursor.fetchall()
            for col in columns:
                nullable = "NULL" if col[3] == 'YES' else "NOT NULL"
                max_len = f"({col[2]})" if col[2] else ""
                print(f"  - {col[0]}: {col[1]}{max_len} {nullable}")

        # channel_status 테이블 구조 확인
        if any('channel_status' in table for table in tables):
            print("\n=== channel_status table structure ===")
            cursor.execute("""
                SELECT column_name, data_type, character_maximum_length, is_nullable
                FROM information_schema.columns
                WHERE table_name = 'channel_status'
                ORDER BY ordinal_position
            """)
            columns = cursor.fetchall()
            for col in columns:
                nullable = "NULL" if col[3] == 'YES' else "NOT NULL"
                max_len = f"({col[2]})" if col[2] else ""
                print(f"  - {col[0]}: {col[1]}{max_len} {nullable}")

        # 인덱스 확인
        print("\n=== Indexes ===")
        cursor.execute("""
            SELECT tablename, indexname, indexdef
            FROM pg_indexes
            WHERE schemaname = 'public'
            AND tablename IN ('distribution_status', 'channel_status')
            ORDER BY tablename, indexname
        """)
        indexes = cursor.fetchall()
        for idx in indexes:
            print(f"  - {idx[0]}.{idx[1]}")
            print(f"    {idx[2]}")

        # 외래 키 확인
        print("\n=== Foreign Keys ===")
        cursor.execute("""
            SELECT
                tc.table_name,
                kcu.column_name,
                ccu.table_name AS foreign_table_name,
                ccu.column_name AS foreign_column_name
            FROM information_schema.table_constraints AS tc
            JOIN information_schema.key_column_usage AS kcu
                ON tc.constraint_name = kcu.constraint_name
                AND tc.table_schema = kcu.table_schema
            JOIN information_schema.constraint_column_usage AS ccu
                ON ccu.constraint_name = tc.constraint_name
                AND ccu.table_schema = tc.table_schema
            WHERE tc.constraint_type = 'FOREIGN KEY'
            AND tc.table_name IN ('distribution_status', 'channel_status')
        """)
        fks = cursor.fetchall()
        for fk in fks:
            print(f"  - {fk[0]}.{fk[1]} -> {fk[2]}.{fk[3]}")

        # 연결 종료
        cursor.close()
        conn.close()

        print("\n✅ Database connection successful!")
        return 0

    except Exception as e:
        print(f"\n❌ Error: {e}", file=sys.stderr)
        return 1

if __name__ == "__main__":
    sys.exit(main())