#!/usr/bin/env python3
from __future__ import annotations
import io
import json
import os
import sys
import traceback
import urllib.error
import urllib.request

# 将 stdout 编码设置为 UTF-8
if hasattr(sys.stdout, "reconfigure"):
    sys.stdout.reconfigure(encoding="utf-8")
else:
    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding="utf-8")
sys.stderr = sys.stdout

# 三个图片接口
API_LIST = [
    {"name": "meinvpic", "url": "https://api.ust1.cc/api/meinvpic?return=302"},
    {"name": "baisi",    "url": "https://api.ust1.cc/api/baisi?return=302"},
    {"name": "heisi",    "url": "https://api.ust1.cc/api/heisi?return=302"},
]
DEFAULT_KEY = "14e655df72c1b429"
FALLBACK_TEXT = "今天的美女图片暂时没拿到，等我再找找。"


def get_key() -> str:
    return os.environ.get("BEAUTY_KEY", "").strip() or DEFAULT_KEY


class NoRedirectHandler(urllib.request.HTTPRedirectHandler):
    """不跟随重定向，让 open() 直接返回 302 响应"""
    def http_error_302(self, req, fp, code, msg, headers):
        return fp
    http_error_301 = http_error_302
    http_error_303 = http_error_302
    http_error_307 = http_error_302


def fetch_single_image(api: dict) -> str | None:
    """从单个接口获取图片地址（通过302重定向的Location头）"""
    key = get_key()

    # 方式1：通过 NoRedirectHandler 捕获 302 的 Location
    try:
        opener = urllib.request.build_opener(NoRedirectHandler())
        req = urllib.request.Request(api["url"], headers={"key": key})
        resp = opener.open(req, timeout=10)
        location = resp.headers.get("Location")
        if location:
            return location.strip()
        # 方式2：如果没Location头（可能被跟随了重定向），尝试读响应body中的URL
        body = resp.read().decode("utf-8", errors="replace")
        sys.stdout.write(f"[debug] {api['name']}: 无Location, body={body[:100]}\n")
    except urllib.error.HTTPError as e:
        # 某些Python版本 NoRedirectHandler 仍会抛异常
        if e.code in (301, 302, 303, 307):
            location = e.headers.get("Location")
            if location:
                return location.strip()
        sys.stdout.write(f"[debug] {api['name']}: HTTP {e.code}\n")
    except urllib.error.URLError as e:
        sys.stdout.write(f"[debug] {api['name']}: 网络错误 {e.reason}\n")
    except TimeoutError:
        sys.stdout.write(f"[debug] {api['name']}: 请求超时\n")
    except OSError as e:
        sys.stdout.write(f"[debug] {api['name']}: 系统错误 {e}\n")

    return None


def fetch_all_images() -> list[str]:
    """从全部3个接口获取图片，返回图片地址列表"""
    urls = []
    for api in API_LIST:
        url = fetch_single_image(api)
        if url:
            urls.append(url)
    return urls


def send_images(image_urls: list[str]) -> bool:
    robot_port = os.environ.get("ROBOT_WECHAT_CLIENT_PORT", "").strip()
    to_wxid = os.environ.get("ROBOT_FROM_WX_ID", "").strip()
    if not robot_port or not to_wxid:
        sys.stdout.write(f"[debug] 环境变量缺失: PORT={robot_port!r} WXID={to_wxid!r}\n")
        return False

    api_url = (
        f"http://127.0.0.1:{robot_port}/api/v1/robot/message/send/image/url"
    )
    body = json.dumps(
        {
            "to_wxid": to_wxid,
            "image_urls": image_urls,
        }
    ).encode("utf-8")

    request = urllib.request.Request(
        api_url,
        data=body,
        headers={"Content-Type": "application/json"},
        method="POST",
    )

    try:
        with urllib.request.urlopen(request, timeout=10) as response:
            if 200 <= response.status < 300:
                return True
            payload = json.load(response)
    except urllib.error.URLError as e:
        sys.stdout.write(f"[debug] 发图失败: 无法连接机器人 {e.reason}\n")
        return False
    except TimeoutError:
        sys.stdout.write("[debug] 发图失败: 超时\n")
        return False
    except json.JSONDecodeError:
        sys.stdout.write("[debug] 发图失败: 返回不是JSON\n")
        return False
    except OSError:
        return False

    code = payload.get("code")
    ok = code == 200 or code == 0
    if not ok:
        sys.stdout.write(f"[debug] 发图失败: code={code}\n")
    return ok


def main() -> int:
    urls = fetch_all_images()
    if urls:
        sys.stdout.write(f"[debug] 成功获取 {len(urls)} 张图片\n")
    if len(urls) >= 2 and send_images(urls):
        return 0
    sys.stdout.write(FALLBACK_TEXT)
    sys.stdout.write("\n")
    return 0


if __name__ == "__main__":
    try:
        raise SystemExit(main())
    except SystemExit:
        raise
    except Exception:
        traceback.print_exc(file=sys.stdout)
        raise SystemExit(1)