#!/usr/bin/env python3
"""
将自动划转 / 币安资金账户相关项写入四所实例 .env（已存在则更新，缺失则追加）。

用法（仓库根目录）：
  python scripts/sync_four_exchange_transfer_env.py
  python scripts/sync_four_exchange_transfer_env.py --dry-run

不修改 API 密钥与其它自定义项；若 .env 不存在则跳过（请先从 .env.example 复制）。
"""
from __future__ import annotations

import argparse
import os
import re

REPO = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

INSTANCES = (
    "crypto_monitor_binance",
    "crypto_monitor_okx",
    "crypto_monitor_gate",
    "crypto_monitor_gate_bot",
)

# 四所统一（页顶「将 swap 调整至 XU」= AUTO_TRANSFER_AMOUNT，双向归集，与 DAILY_START_CAPITAL 独立）
COMMON_KEYS = {
    "AUTO_TRANSFER_ENABLED": "false",
    "AUTO_TRANSFER_FROM": "funding",
    "AUTO_TRANSFER_TO": "swap",
    "TRANSFER_CCY": "USDT",
    "AUTO_TRANSFER_BJ_HOUR": "8",
}

BINANCE_ONLY = {
    "BINANCE_FUNDING_INCLUDE_SPOT": "false",
}


def _parse_env(path: str) -> list[str]:
    if not os.path.isfile(path):
        return []
    with open(path, "r", encoding="utf-8", errors="ignore") as f:
        return f.read().replace("\r\n", "\n").replace("\r", "\n").splitlines()


def _env_get(lines: list[str], key: str) -> str | None:
    pat = re.compile(r"^\s*" + re.escape(key) + r"\s*=\s*(.*)\s*$")
    for line in lines:
        m = pat.match(line)
        if m:
            return m.group(1).strip().strip('"').strip("'")
    return None


def _upsert(lines: list[str], key: str, value: str) -> list[str]:
    pat = re.compile(r"^\s*" + re.escape(key) + r"\s*=")
    out = []
    replaced = False
    for line in lines:
        if pat.match(line):
            if not replaced:
                out.append(f"{key}={value}")
                replaced = True
            continue
        out.append(line)
    if not replaced:
        if out and out[-1].strip():
            out.append("")
        out.append(f"{key}={value}")
    return out


def _ensure_transfer_block(lines: list[str], extra: dict[str, str]) -> list[str]:
    daily = _env_get(lines, "DAILY_START_CAPITAL")
    amount = _env_get(lines, "AUTO_TRANSFER_AMOUNT")
    if amount is None:
        amount = daily if daily else "30"
    keys = dict(COMMON_KEYS)
    keys["AUTO_TRANSFER_AMOUNT"] = amount
    keys.update(extra)
    for k, v in keys.items():
        lines = _upsert(lines, k, v)
    return lines


def sync_one(dir_name: str, dry_run: bool) -> str:
    env_path = os.path.join(REPO, dir_name, ".env")
    if not os.path.isfile(env_path):
        return f"SKIP {dir_name}: 无 .env（请 cp .env.example .env）"
    lines = _parse_env(env_path)
    extra = dict(BINANCE_ONLY) if dir_name == "crypto_monitor_binance" else {}
    new_lines = _ensure_transfer_block(lines, extra)
    if new_lines == lines:
        return f"OK   {dir_name}: 已是最新"
    if dry_run:
        return f"DRY  {dir_name}: 将更新 {len([1 for a,b in zip(lines,new_lines) if a!=b])}+ 行"
    with open(env_path, "w", encoding="utf-8", newline="\n") as f:
        f.write("\n".join(new_lines))
        if new_lines and new_lines[-1].strip():
            f.write("\n")
    amt = _env_get(new_lines, "AUTO_TRANSFER_AMOUNT")
    return f"DONE {dir_name}: AUTO_TRANSFER_AMOUNT={amt}"


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--dry-run", action="store_true")
    args = ap.parse_args()
    for name in INSTANCES:
        print(sync_one(name, args.dry_run))


if __name__ == "__main__":
    main()