#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""存量阈值数据修正（project-20260911-threshold-fix ⑤）

修正前：
  1) 备份 kpi_definitions 全表 → backend/scripts/backups/kpi_definitions.bak-20260911.sql（mysqldump）
  2) 记录 3 行的原值 → backups/threshold_rows_before_20260911.json（可回滚）

修正内容（7 个不可解析表达式 → 0）：
  id=32  F_EVA        : Y='>=-100000' R='<-100000'  → 解析器支持负数后自然可解析，无需改值（仅验证）
  id=46  C_REBATE_RATE: G='52.33~107.67'（保留原绿区间）
                        Y='偏离55%'    → '<52.33|>107.67'（绿区间外即黄）
                        R='偏离>55%'   → '<=36|>=124'（80±27.67×2 ≈ 原"55"口径）
  id=327 BH_SALES_10  : G=''（补）      → '>=200'
                        Y='偏离182878%'→ '>=160'
                        R='偏离>182878%'→ '<120'
                        口径对齐同族 BH_SALES_1..9：G>=target / Y>=0.8target / R<0.6target

用法：
  python3 scripts/fix_threshold_data_20260911.py            # 预演（只打印）
  python3 scripts/fix_threshold_data_20260911.py --apply    # 备份 + 落库
"""
import os
import sys
import json
import subprocess
from datetime import datetime

BASE = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, BASE)

BACKUP_DIR = os.path.join(BASE, "scripts", "backups")

envf = os.path.join(BASE, ".env")
ENV = {}
if os.path.exists(envf):
    for line in open(envf, encoding="utf-8"):
        line = line.strip()
        if line and not line.startswith("#") and "=" in line:
            k, v = line.split("=", 1)
            ENV[k.strip()] = v.strip().strip('"').strip("'")
            os.environ.setdefault(k.strip(), v.strip().strip('"').strip("'"))

from app.database import get_session_local
from app.models import KPIDefinition
from app.utils.threshold_parser import is_valid_threshold

# 目标行号 → 新值（None 表示不改动）
FIXES = {
    46: {"threshold_green": "52.33~107.67",
         "threshold_yellow": "<52.33|>107.67",
         "threshold_red": "<=36|>=124"},
    327: {"threshold_green": ">=200",
          "threshold_yellow": ">=160",
          "threshold_red": "<120"},
}
# 仅验证不修改
VERIFY_ONLY = [32]

FIELDS = ("threshold_green", "threshold_yellow", "threshold_red")


def scan(db):
    """返回 (总表达式数, 不可解析明细)"""
    rows = db.query(KPIDefinition).all()
    total = 0
    bad = []
    for k in rows:
        for f in FIELDS:
            e = getattr(k, f)
            if e is None or not str(e).strip():
                continue
            total += 1
            if not is_valid_threshold(e):
                bad.append((k.id, k.kpi_code, f, str(e)))
    return total, bad


def dump_table_backup():
    os.makedirs(BACKUP_DIR, exist_ok=True)
    out = os.path.join(BACKUP_DIR, "kpi_definitions.bak-20260911.sql")
    cmd = ["mysqldump",
           f"-u{ENV.get('CMA_DB_USER', 'cma_user')}",
           f"-p{ENV.get('CMA_DB_PASS', '')}",
           f"-h{ENV.get('CMA_DB_HOST', '127.0.0.1')}",
           f"-P{ENV.get('CMA_DB_PORT', '3306')}",
           ENV.get("CMA_DB_NAME", "cma"), "kpi_definitions"]
    with open(out, "w", encoding="utf-8") as fh:
        p = subprocess.run(cmd, stdout=fh, stderr=subprocess.PIPE)
    if p.returncode != 0:
        raise SystemExit("mysqldump 失败: " + p.stderr.decode("utf-8", "ignore")[:400])
    return out


def main():
    apply = "--apply" in sys.argv
    db = get_session_local()()

    total_before, bad_before = scan(db)
    print(f"[before] 非空阈值表达式 {total_before} 条, 不可解析 {len(bad_before)} 条")
    for b in bad_before:
        print("   BAD", b)

    # 记录原值（备份 json）
    rows_before = []
    for tid in list(FIXES.keys()) + VERIFY_ONLY:
        k = db.query(KPIDefinition).filter(KPIDefinition.id == tid).first()
        if k:
            rows_before.append({"id": k.id, "kpi_code": k.kpi_code, "kpi_name": k.kpi_name,
                                "target_value": k.target_value,
                                **{f: getattr(k, f) for f in FIELDS}})
    os.makedirs(BACKUP_DIR, exist_ok=True)
    jpath = os.path.join(BACKUP_DIR, "threshold_rows_before_20260911.json")
    if apply:
        with open(jpath, "w", encoding="utf-8") as fh:
            json.dump({"created_at": datetime.now().isoformat(), "rows": rows_before},
                      fh, ensure_ascii=False, indent=2)
        sql_path = dump_table_backup()
        print(f"[backup] json={jpath}")
        print(f"[backup] sql={sql_path}")
    else:
        print(f"[dry-run] 将写入备份 json={jpath}（未执行）")
    for r in rows_before:
        print("   before:", r)

    # 应用修正
    for tid, newvals in FIXES.items():
        k = db.query(KPIDefinition).filter(KPIDefinition.id == tid).first()
        if not k:
            print(f"   !! id={tid} 不存在，跳过")
            continue
        for f, v in newvals.items():
            old = getattr(k, f)
            print(f"   id={tid} {f}: {old!r} -> {v!r}")
            if apply:
                setattr(k, f, v)
    if apply:
        db.commit()

    # 回查
    for tid in list(FIXES.keys()) + VERIFY_ONLY:
        k = db.query(KPIDefinition).filter(KPIDefinition.id == tid).first()
        if k:
            vals = {f: getattr(k, f) for f in FIELDS}
            ok = all(is_valid_threshold(v) for v in vals.values())
            print(f"[after] id={tid} {k.kpi_code} {vals} parseable={ok}")

    total_after, bad_after = scan(db)
    print(f"[after] 非空阈值表达式 {total_after} 条, 不可解析 {len(bad_after)} 条")
    for b in bad_after:
        print("   BAD", b)
    db.close()
    if not apply:
        print("※ 预演模式，未落库。加 --apply 执行。")


if __name__ == "__main__":
    main()