#!/usr/bin/env python3
"""Schema 一致性检查 — 部署门禁
检查 ORM model 与数据库表结构是否一致，输出差异并给出修复建议。
运行: python3 scripts/schema_check.py
"""
import sys, os
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from sqlalchemy import inspect, text
from app.database import get_engine
import app.models

def main():
    engine = get_engine()
    insp = inspect(engine)
    db_tables = set(insp.get_table_names())
    model_tables = set(app.models.Base.metadata.tables.keys())

    print("===== CMA Schema 一致性检查 =====")
    print(f"数据库表: {len(db_tables)} | ORM模型表: {len(model_tables)}")
    print()

    issues = 0

    # 1. 表缺失
    missing_tables = model_tables - db_tables
    if missing_tables:
        issues += len(missing_tables)
        print(f"❌ ORM有但数据库缺失的表: {missing_tables}")
        print("   修复: 运行 Base.metadata.create_all() 或手动建表")
    else:
        print("✅ 表结构齐全")

    # 2. 字段差异
    for tbl in sorted(model_tables & db_tables):
        model_cols = set(app.models.Base.metadata.tables[tbl].columns.keys())
        db_cols = set(c["name"] for c in insp.get_columns(tbl))
        missing = model_cols - db_cols
        extra = db_cols - model_cols
        if missing:
            issues += len(missing)
            print(f"❌ [{tbl}] 数据库缺ORM字段: {missing}")
            print(f"   修复: ALTER TABLE {tbl} ADD COLUMN ...")
        if extra:
            # 数据库有但ORM没有的字段 — 检查是否NOT NULL且ORM创建时不填
            print(f"⚠️ [{tbl}] ORM未定义但数据库有: {extra}")

    # 3. 关键表字段检查（只报真实结构差异：ORM有DB缺，或DB有ORM缺）
    critical = ["kpi_definitions", "kpi_values", "strategic_maps", "budget_plans", "action_plans"]
    for tbl in critical:
        if tbl not in db_tables:
            continue
        model_cols = set(app.models.Base.metadata.tables[tbl].columns.keys())
        db_cols = set(c["name"] for c in insp.get_columns(tbl))
        missing = model_cols - db_cols
        extra = db_cols - model_cols
        if missing:
            issues += len(missing)
            print(f"❌ [{tbl}] 数据库缺ORM字段: {missing}")
            print(f"   修复: ALTER TABLE {tbl} ADD COLUMN ...")
        if extra:
            # DB有ORM无 → 可能影响ORM写入/读取，提示但不阻塞
            print(f"⚠️ [{tbl}] ORM未定义但数据库有: {extra}")

    print()
    if issues:
        print(f"🚨 发现 {issues} 处差异，需处理后再部署")
        sys.exit(1)
    else:
        print("✅ Schema 一致，无阻塞问题")
        sys.exit(0)

if __name__ == "__main__":
    main()