#!/usr/bin/env python3
"""
migrate_auth_sqlite_to_pg.py — 将SQLite中的auth相关表迁移到PG
运行前确保PG连接参数正确（db.py中的配置）
"""
import os, sys, sqlite3

sys.path.insert(0, os.path.dirname(__file__))
from db import get_sync_conn

SQLITE_PATH = os.path.join(os.path.dirname(__file__), "..", "arb.db")


def migrate():
    if not os.path.exists(SQLITE_PATH):
        print(f"SQLite DB not found: {SQLITE_PATH}")
        return

    sq = sqlite3.connect(SQLITE_PATH)
    sq.row_factory = sqlite3.Row

    with get_sync_conn() as pg:
        cur = pg.cursor()

        # 1. 建auth相关表
        print("Creating auth tables in PG...")
        auth_tables = """
        CREATE TABLE IF NOT EXISTS subscriptions (
            user_id BIGINT PRIMARY KEY,
            tier TEXT NOT NULL DEFAULT 'free',
            expires_at TEXT
        );
        CREATE TABLE IF NOT EXISTS invite_usage (
            id BIGSERIAL PRIMARY KEY,
            code_id BIGINT NOT NULL,
            user_id BIGINT NOT NULL,
            used_at TEXT
        );
        CREATE TABLE IF NOT EXISTS refresh_tokens (
            id BIGSERIAL PRIMARY KEY,
            user_id BIGINT NOT NULL,
            token TEXT UNIQUE NOT NULL,
            expires_at TEXT NOT NULL,
            revoked INTEGER NOT NULL DEFAULT 0,
            created_at TEXT
        );
        """
        for stmt in auth_tables.split(";"):
            stmt = stmt.strip()
            if stmt:
                try:
                    cur.execute(stmt)
                except Exception as e:
                    pg.rollback()
        pg.commit()

        # 2. 迁移users（PG已有users表但可能是空的旧结构）
        print("Migrating users...")
        # 先加缺失列
        for col, defn in [("discord_id", "TEXT"), ("banned", "INTEGER DEFAULT 0")]:
            try:
                cur.execute(f"ALTER TABLE users ADD COLUMN {col} {defn}")
                pg.commit()
            except:
                pg.rollback()

        rows = sq.execute("SELECT * FROM users").fetchall()
        for r in rows:
            try:
                cur.execute(
                    """INSERT INTO users (id, email, password_hash, discord_id, role, banned, created_at)
                    VALUES (%s, %s, %s, %s, %s, %s, %s)
                    ON CONFLICT (id) DO UPDATE SET
                        password_hash = EXCLUDED.password_hash,
                        discord_id = EXCLUDED.discord_id,
                        role = EXCLUDED.role,
                        banned = EXCLUDED.banned""",
                    (r["id"], r["email"], r["password_hash"],
                     r["discord_id"] if "discord_id" in r.keys() else None,
                     r["role"], r["banned"], r["created_at"])
                )
            except Exception as e:
                print(f"  User {r['email']} error: {e}")
                pg.rollback()
                continue
        pg.commit()
        print(f"  Migrated {len(rows)} users")

        # 3. 迁移invite_codes（PG已有但可能缺列）
        print("Migrating invite_codes...")
        for col, defn in [("created_by", "INTEGER"), ("max_uses", "INTEGER DEFAULT 1"),
                          ("used_count", "INTEGER DEFAULT 0"), ("status", "TEXT DEFAULT 'active'"),
                          ("expires_at", "TEXT")]:
            try:
                cur.execute(f"ALTER TABLE invite_codes ADD COLUMN {col} {defn}")
                pg.commit()
            except:
                pg.rollback()

        try:
            rows = sq.execute("SELECT * FROM invite_codes").fetchall()
            for r in rows:
                try:
                    cur.execute(
                        """INSERT INTO invite_codes (id, code, created_by, max_uses, used_count, status, expires_at, created_at)
                        VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
                        ON CONFLICT (id) DO NOTHING""",
                        (r["id"], r["code"], r["created_by"] if "created_by" in r.keys() else None,
                         r["max_uses"], r["used_count"], r["status"],
                         r["expires_at"] if "expires_at" in r.keys() else None,
                         r["created_at"] if "created_at" in r.keys() else None)
                    )
                except Exception as e:
                    print(f"  Invite {r['code']} error: {e}")
                    pg.rollback()
                    continue
            pg.commit()
            print(f"  Migrated {len(rows)} invite codes")
        except Exception as e:
            print(f"  invite_codes table error: {e}")

        # 4. 迁移subscriptions
        print("Migrating subscriptions...")
        try:
            rows = sq.execute("SELECT * FROM subscriptions").fetchall()
            for r in rows:
                try:
                    cur.execute(
                        "INSERT INTO subscriptions (user_id, tier, expires_at) VALUES (%s, %s, %s) ON CONFLICT(user_id) DO NOTHING",
                        (r["user_id"], r["tier"], r["expires_at"])
                    )
                except Exception as e:
                    pg.rollback()
            pg.commit()
            print(f"  Migrated {len(rows)} subscriptions")
        except Exception as e:
            print(f"  subscriptions error: {e}")

        # 5. 迁移refresh_tokens
        print("Migrating refresh_tokens...")
        try:
            rows = sq.execute("SELECT * FROM refresh_tokens").fetchall()
            for r in rows:
                try:
                    cur.execute(
                        "INSERT INTO refresh_tokens (user_id, token, expires_at, revoked) VALUES (%s, %s, %s, %s) ON CONFLICT(token) DO NOTHING",
                        (r["user_id"], r["token"], r["expires_at"], r["revoked"])
                    )
                except Exception as e:
                    pg.rollback()
            pg.commit()
            print(f"  Migrated {len(rows)} refresh tokens")
        except Exception as e:
            print(f"  refresh_tokens error: {e}")

        # 6. 重置序列
        print("Resetting sequences...")
        for table in ["users", "invite_codes", "invite_usage", "refresh_tokens"]:
            try:
                cur.execute(f"SELECT setval(pg_get_serial_sequence('{table}', 'id'), COALESCE(MAX(id), 1)) FROM {table}")
                pg.commit()
            except:
                pg.rollback()

    sq.close()
    print("\nAuth migration complete!")


if __name__ == "__main__":
    migrate()