# router_users.py
from fastapi import APIRouter, HTTPException, BackgroundTasks
import time
import re
import random
import os
import json
import urllib.request
import urllib.parse
import base64
import 数据库连接 as db
from notifications import add_notification
from models import UserRegister, UserLogin, UserUpdate, PasswordReset, FollowToggle, PrivacySettings, SendCodeRequest

router = APIRouter()

# ==========================================
# 验证码内存缓存与发送引擎
# ==========================================
VERIFY_CODES = {} 

def send_email_code(to_email: str, code: str, action: str):
    """利用自动化 Webhook 作为 HTTPS 到 SMTP 的代理桥梁"""
    webhook_url = os.environ.get("MAKE_WEBHOOK_URL")

    if not webhook_url:
        print("警告: 未配置 MAKE_WEBHOOK_URL，跳过邮件发送")
        return

    action_str = "注册账号" if action == "register" else "修改/找回密码"
    subject = f"ComfyUI 社区 - {action_str}验证码"
    
    html_content = f"""
    <div style="background:#f9f9f9; padding:20px; font-family:sans-serif;">
        <div style="background:#fff; padding:20px; border-radius:8px; max-width:500px; margin:0 auto; box-shadow:0 2px 10px rgba(0,0,0,0.05);">
            <h2 style="color:#4CAF50; margin-top:0;">ComfyUI 社区精选</h2>
            <p>您好，</p>
            <p>您正在请求<strong>{action_str}</strong>，您的验证码是：</p>
            <div style="font-size:24px; font-weight:bold; color:#2196F3; background:#e3f2fd; padding:15px; text-align:center; border-radius:6px; letter-spacing: 5px;">{code}</div>
            <p style="color:#888; font-size:12px; margin-top:20px;">该验证码在 10 分钟内有效。如非本人操作，请忽略此邮件。</p>
        </div>
    </div>
    """

    data = {
        "to": to_email,
        "subject": subject,
        "html": html_content
    }

    req = urllib.request.Request(
        webhook_url, 
        data=json.dumps(data).encode('utf-8'), 
        headers={'Content-Type': 'application/json'}
    )
    try:
        with urllib.request.urlopen(req, timeout=10) as response:
            print(f"✅ 成功触发 Webhook 发送验证码 {code} 至 {to_email}")
    except Exception as e:
        print(f"❌ Webhook 触发失败: {e}")

def send_sms_code(phone: str, code: str, action: str):
    """支持 阿里云 与 Twilio 的双引擎短信发送路由"""
    action_str = "注册账号" if action == "register" else "修改/找回密码"

    # ==========================================
    # 引擎 A：Twilio (无需装 SDK，走纯 HTTP 接口，适合海外或免审核测试)
    # ==========================================
    twilio_sid = os.environ.get("TWILIO_SID")
    if twilio_sid:
        token = os.environ.get("TWILIO_TOKEN")
        from_phone = os.environ.get("TWILIO_FROM")
        
        body = f"【ComfyUI社区】您正在请求{action_str}，验证码是：{code}，10分钟内有效。"
        url = f"https://api.twilio.com/2010-04-01/Accounts/{twilio_sid}/Messages.json"
        auth = base64.b64encode(f"{twilio_sid}:{token}".encode('utf-8')).decode('utf-8')
        data = urllib.parse.urlencode({'To': phone, 'From': from_phone, 'Body': body}).encode('utf-8')
        
        req = urllib.request.Request(url, data=data)
        req.add_header("Authorization", f"Basic {auth}")
        try:
            with urllib.request.urlopen(req, timeout=10) as response:
                print(f"✅ Twilio 短信已成功下发至 {phone}")
        except Exception as e:
            print(f"❌ Twilio 发送失败: {e}")
        return

    # ==========================================
    # 引擎 B：阿里云 (国内首选，到达率最高)
    # ==========================================
    aliyun_ak = os.environ.get("ALIYUN_AK")
    if aliyun_ak:
        try:
            from alibabacloud_dysmsapi20170525.client import Client as DysmsapiClient
            from alibabacloud_tea_openapi import models as open_api_models
            from alibabacloud_dysmsapi20170525 import models as dysmsapi_models
        except ImportError:
            print("❌ 缺少阿里云 SDK，请在 requirements.txt 中添加 alibabacloud_dysmsapi20170525")
            return

        sk = os.environ.get("ALIYUN_SK")
        sign_name = os.environ.get("ALIYUN_SIGN_NAME") # 短信签名，例如 "阿里云"
        tpl_code = os.environ.get("ALIYUN_TPL_REGISTER") if action == "register" else os.environ.get("ALIYUN_TPL_RESET")

        config = open_api_models.Config(access_key_id=aliyun_ak, access_key_secret=sk)
        config.endpoint = 'dysmsapi.aliyuncs.com'
        client = DysmsapiClient(config)

        send_req = dysmsapi_models.SendSmsRequest(
            phone_numbers=phone,
            sign_name=sign_name,
            template_code=tpl_code,
            template_param=json.dumps({"code": code}) 
        )
        try:
            response = client.send_sms(send_req)
            if response.body.code == "OK":
                print(f"✅ 阿里云短信已成功下发至 {phone}")
            else:
                print(f"❌ 阿里云下发失败: {response.body.message}")
        except Exception as e:
            print(f"❌ 阿里云请求异常: {e}")
        return

    # 如果都没有配置，则降级为控制台打印模拟
    print(f"⚠️ 未配置短信秘钥，模拟下发 -> 手机号: {phone}, 验证码: {code}")

# ==========================================
# 接口路由
# ==========================================
@router.post("/api/users/send-code")
async def send_verify_code(req: SendCodeRequest, bg_tasks: BackgroundTasks):
    if req.action_type == "reset":
        if not req.account:
            raise HTTPException(status_code=400, detail="找回密码需先填写当前账号")
        
        users_db = db.load_data("users.json", default_data={})
        user = users_db.get(req.account)
        if not user:
            raise HTTPException(status_code=404, detail="该账号不存在")
            
        if req.contact_type == "email" and user.get("email") != req.contact:
            raise HTTPException(status_code=400, detail="填写的邮箱与该账号绑定的邮箱不一致")
        if req.contact_type == "phone" and user.get("phone") != req.contact:
            raise HTTPException(status_code=400, detail="填写的手机号与该账号绑定的手机号不一致")

    code = str(random.randint(100000, 999999))
    cache_key = f"{req.contact}_{req.action_type}"
    
    VERIFY_CODES[cache_key] = {
        "code": code,
        "expires_at": int(time.time()) + 600
    }
    
    if req.contact_type == "email":
        bg_tasks.add_task(send_email_code, req.contact, code, req.action_type)
    elif req.contact_type == "phone":
        bg_tasks.add_task(send_sms_code, req.contact, code, req.action_type)
    else:
        raise HTTPException(status_code=400, detail="不支持的验证方式")
        
    return {"status": "success", "message": "验证码发送请求已提交"}

@router.post("/api/users/register")
async def register_user(user: UserRegister):
    users_db = db.load_data("users.json", default_data={})
    
    cache_key = f"{user.email}_register" if user.email else f"{user.phone}_register"
    cached = VERIFY_CODES.get(cache_key)
    if not cached or cached["code"] != user.code or int(time.time()) > cached["expires_at"]:
        raise HTTPException(status_code=400, detail="验证码不正确或已过期")
        
    if len(user.account) <= 5: raise HTTPException(status_code=400, detail="账号必须大于5个字符")
    if not re.match(r'^[a-zA-Z0-9_]{6,20}$', user.account): raise HTTPException(status_code=400, detail="账号仅支持大小写英文字母、数字及下划线")
    if len(user.password) < 6: raise HTTPException(status_code=400, detail="密码必须大于等于6个字符")
    if not re.match(r'^[a-zA-Z0-9!@#$%^&*()_+\-=\[\]{};\':"\\|,.<>\/?]{6,}$', user.password): raise HTTPException(status_code=400, detail="密码包含不支持的特殊字符")
    if user.intro and len(user.intro) > 100: raise HTTPException(status_code=400, detail="个人介绍不能超过100个字符")
    if user.account in users_db: raise HTTPException(status_code=400, detail="该账号已被注册")
    for existing_user in users_db.values():
        if user.email and existing_user.get("email") == user.email: raise HTTPException(status_code=400, detail="该邮箱已被绑定")
        if user.phone and existing_user.get("phone") == user.phone: raise HTTPException(status_code=400, detail="该手机号已被绑定")
    
    VERIFY_CODES.pop(cache_key, None) 
    
    new_user = user.dict()
    new_user.pop("code", None)
    new_user.update({"created_at": int(time.time()), "followers": [], "following": [], "privacy": {"follows": False, "likes": False, "favorites": False, "downloads": False}})
    users_db[user.account] = new_user
    db.save_data("users.json", users_db)
    return {"status": "success", "message": "注册成功", "data": {k: v for k, v in new_user.items() if k != "password"}}

@router.post("/api/users/login")
async def login_user(user: UserLogin):
    users_db = db.load_data("users.json", default_data={})
    if user.account not in users_db: raise HTTPException(status_code=404, detail="账号不存在")
    user_data = users_db[user.account]
    if user_data.get("password") != user.password: raise HTTPException(status_code=401, detail="密码错误")
    return {"status": "success", "token": f"mock_token_{user.account}", "account": user.account, "name": user_data["name"], "avatar": user_data.get("avatarDataUrl", "https://via.placeholder.com/150")}

# ==========================================
# 补充：发送验证码的 API 接口
# ==========================================
@router.post("/api/users/send_code")
async def send_code_api(req: SendCodeRequest):
    # 1. 生成 6 位随机数字验证码
    code = str(random.randint(100000, 999999))
    
    # 2. 生成缓存 Key (格式: 邮箱地址_动作)
    # 例如: test@qq.com_register 或 test@qq.com_reset
    key = f"{req.contact}_{req.action_type}"
    
    # 3. 存入全局内存字典 (设置有效期为 10 分钟 = 600 秒)
    VERIFY_CODES[key] = {
        "code": code,
        "expires": time.time() + 600
    }
    
    # 4. 触发发送逻辑
    if req.contact_type == "email":
        try:
            # 调用你文件里已经写好的通过 Make.com Webhook 发邮件的函数
            send_email_code(req.contact, code, req.action_type)
            return {"status": "success", "message": "验证码已成功发送至邮箱"}
        except Exception as e:
            raise HTTPException(status_code=500, detail=f"邮件发送失败: {str(e)}")
            
    elif req.contact_type == "phone":
        # 预留的短信通道
        return {"status": "success", "message": "验证码已成功发送至手机"}
        
    else:
        raise HTTPException(status_code=400, detail="不支持的验证方式")

@router.get("/api/users/{account}")
async def get_user_profile(account: str):
    users_db = db.load_data("users.json", default_data={})
    if account not in users_db: raise HTTPException(status_code=404, detail="用户不存在")
    user_data = users_db[account]
    items_db = db.load_data("items.json", default_data=[])
    user_items = [item for item in items_db if item.get("author") == account]
    user_data["receivedLikes"] = sum(item.get("likes", 0) for item in user_items)
    user_data["receivedFavorites"] = sum(item.get("favorites", 0) for item in user_items)
    user_data["receivedUses"] = sum(item.get("uses", 0) for item in user_items)
    return {"status": "success", "data": {k: v for k, v in user_data.items() if k != "password"}}

@router.put("/api/users/{account}")
async def update_user_profile(account: str, update_data: UserUpdate):
    users_db = db.load_data("users.json", default_data={})
    if account not in users_db: raise HTTPException(status_code=404, detail="用户不存在")
    if update_data.intro and len(update_data.intro) > 100: raise HTTPException(status_code=400, detail="个人介绍不能超过100个字符")
    user = users_db[account]
    for k, v in update_data.dict(exclude_unset=True).items():
        if v is not None: user[k] = v
    db.save_data("users.json", users_db)
    return {"status": "success", "data": {k: v for k, v in user.items() if k != "password"}}

@router.post("/api/users/{account}/reset-password")
async def reset_password(account: str, pwd_data: PasswordReset):
    users_db = db.load_data("users.json", default_data={})
    if account not in users_db: raise HTTPException(status_code=404, detail="用户不存在")
    user = users_db[account]
    
    if pwd_data.verify_type == "email" and user.get("email") != pwd_data.verify_contact:
        raise HTTPException(status_code=400, detail="填写的邮箱与该账号绑定的邮箱不匹配")
    if pwd_data.verify_type == "phone" and user.get("phone") != pwd_data.verify_contact:
        raise HTTPException(status_code=400, detail="填写的手机号与该账号绑定的手机号不匹配")

    cache_key = f"{pwd_data.verify_contact}_reset"
    cached = VERIFY_CODES.get(cache_key)
    if not cached or cached["code"] != pwd_data.code or int(time.time()) > cached["expires_at"]:
        raise HTTPException(status_code=400, detail="验证码不正确或已过期")

    if len(pwd_data.new_password) < 6: raise HTTPException(status_code=400, detail="新密码必须大于等于6个字符")
    if not re.match(r'^[a-zA-Z0-9!@#$%^&*()_+\-=\[\]{};\':"\\|,.<>\/?]{6,}$', pwd_data.new_password): raise HTTPException(status_code=400, detail="新密码包含不支持的特殊字符")
    
    VERIFY_CODES.pop(cache_key, None)
    user["password"] = pwd_data.new_password
    db.save_data("users.json", users_db)
    return {"status": "success"}

@router.post("/api/users/follow")
async def toggle_follow(follow: FollowToggle):
    users_db = db.load_data("users.json", default_data={})
    if follow.target_account not in users_db or follow.user_id not in users_db: raise HTTPException(status_code=404, detail="用户不存在")
    target_followers = users_db[follow.target_account].setdefault("followers", [])
    current_following = users_db[follow.user_id].setdefault("following", [])
    if follow.is_active:
        if follow.user_id not in target_followers: 
            target_followers.append(follow.user_id)
            add_notification(follow.target_account, {"type": "follow", "from_user": follow.user_id})
        if follow.target_account not in current_following: current_following.append(follow.target_account)
    else:
        if follow.user_id in target_followers: target_followers.remove(follow.user_id)
        if follow.target_account in current_following: current_following.remove(follow.target_account)
    db.save_data("users.json", users_db)
    return {"status": "success"}

@router.put("/api/users/{account}/privacy")
async def update_privacy(account: str, privacy: PrivacySettings):
    users_db = db.load_data("users.json", default_data={})
    if account not in users_db: 
        raise HTTPException(status_code=404, detail="用户不存在")
    
    users_db[account]["privacy"] = privacy.dict()
    db.save_data("users.json", users_db)
    return {"status": "success"}