# -*- coding: utf-8 -*-
"""为已有数据库添加新列（traffic、countries）并将部分列改为可空。仅需运行一次。"""
import sys
from app import app, db
from sqlalchemy import text

def run():
    with app.app_context():
        engine = db.engine
        dialect = engine.dialect.name
        if dialect == "mysql":
            with engine.connect() as conn:
                for col, spec in [
                    ("traffic", "VARCHAR(64) NULL"),
                    ("countries", "VARCHAR(255) NULL"),
                ]:
                    try:
                        conn.execute(text("ALTER TABLE vps_plans ADD COLUMN {} {}".format(col, spec)))
                        conn.commit()
                        print("Added column:", col)
                    except Exception as e:
                        if "Duplicate column" in str(e) or "already exists" in str(e).lower():
                            print("Column", col, "already exists, skip.")
                        else:
                            print("Add", col, ":", e)
                for col, spec in [
                    ("region", "VARCHAR(128) NULL"),
                    ("vcpu", "INT NULL"),
                    ("memory_gb", "INT NULL"),
                    ("storage_gb", "INT NULL"),
                    ("bandwidth_mbps", "INT NULL"),
                    ("price_cny", "DOUBLE NULL"),
                    ("price_usd", "DOUBLE NULL"),
                ]:
                    try:
                        conn.execute(text("ALTER TABLE vps_plans MODIFY COLUMN {} {}".format(col, spec)))
                        conn.commit()
                        print("Modified column:", col)
                    except Exception as e:
                        print("Modify", col, ":", e)
        else:
            print("Only MySQL migration is implemented. For SQLite, recreate the DB or add columns manually.")
    print("Done.")

if __name__ == "__main__":
    run()
    sys.exit(0)