import os

from robyn import jsonify, Response, Request
from app import app
from datetime import datetime, timedelta
import uuid
import json
from service.UserService import user_service

# 临时存储token，用于会话管理
TEMP_TOKENS = {}

def generate_token() -> str:
    """生成随机token"""
    return str(uuid.uuid4())

def validate_token(token: str) -> dict:
    """验证token并返回用户信息"""
    if not token or token not in TEMP_TOKENS:
        return None
    
    # 检查token是否过期
    if datetime.now() > TEMP_TOKENS[token]["expires_at"]:
        del TEMP_TOKENS[token]
        return None
    
    return TEMP_TOKENS[token]["user"]

@app.post("/api/login")
def login_route(request):
    """登录接口"""
    try:
        # 解析请求数据
        request_data = {}
        if request.body:
            try:
                request_data = json.loads(request.body)
            except json.JSONDecodeError:
                pass
        
        # 如果JSON解析失败，尝试从form_data获取
        if not request_data and hasattr(request, 'form_data'):
            request_data = getattr(request, 'form_data', {})
        
        username = request_data.get("username", "").strip()
        password = request_data.get("password", "").strip()
        remember = request_data.get("remember", False)
        
        # 验证输入
        if not username or not password:
            return Response(
                status_code=400,
                description=jsonify({"success": False, "message": "用户名和密码不能为空"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 验证用户
        user = user_service.verify_user(username, password)
        if not user:
            return Response(
                status_code=401,
                description=jsonify({"success": False, "message": "用户名或密码错误"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 生成token并设置过期时间
        token = generate_token()
        expires_at = datetime.now() + timedelta(days=7 if remember else 1)
        TEMP_TOKENS[token] = {"user": user, "expires_at": expires_at}
        
        return Response(
            status_code=200,
            description=jsonify({"success": True, "message": "登录成功", "token": token, "user": user}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )
    except Exception as e:
        return Response(
            status_code=500,
            description=jsonify({"success": False, "message": f"登录失败: {str(e)}"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )

@app.post("/api/logout")
def logout_route(request):
    """登出接口"""
    try:
        request_data = json.loads(request.body) if request.body else {}
        token = request_data.get("token", "")
        # 删除token
        TEMP_TOKENS.pop(token, None)
        
        return Response(
            status_code=200,
            description=jsonify({"success": True, "message": "登出成功"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )
    except Exception as e:
        return Response(
            status_code=500,
            description=jsonify({"success": False, "message": f"登出失败: {str(e)}"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )

@app.get("/api/userInfo")
def user_info_route(request):
    """获取用户信息接口"""
    try:
        query_params = getattr(request, 'query_params', {})
        token = query_params.get("token", "")
        
        # 验证token
        user = validate_token(token)
        if not user:
            return Response(
                status_code=401,
                description=jsonify({"success": False, "message": "未登录或登录已过期"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 从数据库获取最新的用户信息
        username = user["username"]
        db_user = user_service.get_user_info(username)
        if db_user:
            # 更新TEMP_TOKENS中的用户信息
            TEMP_TOKENS[token]["user"] = db_user
            user_info = db_user
        else:
            user_info = user
        
        return Response(
            status_code=200,
            description=jsonify({"success": True, "user": user_info}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )
    except Exception as e:
        return Response(
            status_code=500,
            description=jsonify({"success": False, "message": f"获取用户信息失败: {str(e)}"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )

@app.post("/api/updateAvatar")
async def update_avatar_route(request: Request):
    """更新用户头像接口"""
    try:
        # 从files中获取文件和token
        avatar_file = request.files.get('avatar') if hasattr(request, 'files') else None
        token = None
        
        # 从form_data中获取token
        if hasattr(request, 'form_data'):
            token = request.form_data.get('token')
            
        # 如果files中没有直接找到'avatar'，尝试获取第一个文件
        if not avatar_file and hasattr(request, 'files') and request.files:
            first_key = list(request.files.keys())[0]
            avatar_file = request.files[first_key]
        
        # 如果form_data中没有token，尝试从headers获取
        if not token:
            headers_dict = {}
            if hasattr(request, 'headers'):
                try:
                    headers_dict = dict(request.headers)
                except:
                    pass
            token = headers_dict.get('Authorization') or headers_dict.get('authorization')
            
        # 如果还是没有token，尝试从body中解析
        if not token and hasattr(request, 'body'):
            try:
                body_data = json.loads(request.body)
                token = body_data.get('token')
            except:
                pass
                
        # 验证token
        user = validate_token(token)
        if not user:
            return Response(
                status_code=401,
                description=jsonify({"success": False, "message": "未登录或登录已过期"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 检查文件是否存在
        if not avatar_file:
            return Response(
                status_code=400,
                description=jsonify({"success": False, "message": "未上传头像文件"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 获取文件内容和文件名
        file_content = None
        filename = ""
        
        # Robyn框架中，files字典的值通常是字节数据
        if isinstance(avatar_file, bytes):
            file_content = avatar_file
            filename = list(request.files.keys())[0] if request.files else "avatar.jpg"
        elif isinstance(avatar_file, str):
            filename = avatar_file
        else:
            if avatar_file is not None:
                # 尝试获取文件内容的其他方式
                if hasattr(avatar_file, 'content'):
                    file_content = avatar_file.content
                elif hasattr(avatar_file, 'read'):
                    file_content = avatar_file.read()
                filename = getattr(avatar_file, 'filename', 'avatar.jpg')
        
        # 如果我们有文件内容，继续处理
        if not file_content:
            return Response(
                status_code=400,
                description=jsonify({"success": False, "message": "无法读取文件内容"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 处理文件名
        if not filename:
            filename = "avatar.jpg"
        
        file_extension = filename.split('.')[-1] if '.' in filename else 'jpg'
        
        # 验证文件类型
        is_valid_image = False
        
        # 通过扩展名验证
        if file_extension.lower() in ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp', 'svg']:
            is_valid_image = True
        
        # 如果扩展名验证失败，尝试读取文件头验证
        if not is_valid_image:
            try:
                if (file_content.startswith(b'\xFF\xD8\xFF') or  # JPEG
                    file_content.startswith(b'\x89PNG\r\n\x1a\n') or  # PNG
                    file_content.startswith(b'GIF87a') or  # GIF
                    file_content.startswith(b'GIF89a') or  # GIF
                    file_content.startswith(b'BM') or  # BMP
                    file_content.startswith(b'RIFF') and b'WEBP' in file_content[:12]):  # WebP
                    is_valid_image = True
            except Exception:
                pass
        
        if not is_valid_image:
            return Response(
                status_code=400,
                description=jsonify({"success": False, "message": f"文件类型必须是图片 (支持的格式: JPG, PNG, GIF, BMP, WebP, SVG)"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 生成唯一的文件名
        import time
        import random
        timestamp = int(time.time())
        random_num = random.randint(1000, 9999)
        username = user["username"]
        new_filename = f"{username}_{timestamp}_{random_num}.{file_extension}"
        
        # 定义文件保存路径（使用相对路径）
        current_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
        avatar_dir = os.path.join(current_dir, "resource", "avatar")
        file_path = os.path.join(avatar_dir, new_filename)
        
        # 确保目录存在
        os.makedirs(avatar_dir, exist_ok=True)
        
        # 保存文件到磁盘
        with open(file_path, "wb") as f:
            f.write(file_content)
        
        # 更新用户头像到数据库，存储相对路径
        avatar_relative_path = f"/resource/avatar/{new_filename}"
        success = user_service.update_user_avatar(username, avatar_relative_path)
        
        if not success:
            return Response(
                status_code=500,
                description=jsonify({"success": False, "message": "更新头像失败"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 更新token中的用户信息
        TEMP_TOKENS[token]["user"]["avatar"] = avatar_relative_path
        
        return Response(
            status_code=200,
            description=jsonify({
                "success": True, 
                "message": "头像更新成功",
                "avatar": avatar_relative_path
            }),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )
    except Exception as e:
        return Response(
            status_code=500,
            description=jsonify({"success": False, "message": f"更新头像失败: {str(e)}"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )

@app.post("/api/updatePassword")
def update_password_route(request):
    """更新用户密码接口"""
    try:
        # 解析请求数据
        request_data = json.loads(request.body) if request.body else {}
        
        token = request_data.get("token", "")
        current_password = request_data.get("currentPassword", "")
        new_password = request_data.get("newPassword", "")
        
        # 验证输入
        if not current_password or not new_password:
            return Response(
                status_code=400,
                description=jsonify({"success": False, "message": "当前密码和新密码不能为空"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 验证token
        user = validate_token(token)
        if not user:
            return Response(
                status_code=401,
                description=jsonify({"success": False, "message": "未登录或登录已过期"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 获取用户信息
        username = user["username"]
        
        # 验证当前密码
        db_user = user_service.get_user_by_username(username)
        if not db_user:
            return Response(
                status_code=404,
                description=jsonify({"success": False, "message": "用户不存在"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 验证密码
        is_password_valid = user_service.verify_password(current_password, db_user["password"])
        if not is_password_valid:
            return Response(
                status_code=401,
                description=jsonify({"success": False, "message": "当前密码不正确"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        # 更新密码
        success = user_service.update_user_password(username, new_password)
        if not success:
            return Response(
                status_code=500,
                description=jsonify({"success": False, "message": "密码更新失败"}),
                headers={"Content-Type": "application/json; charset=utf-8"}
            )
        
        return Response(
            status_code=200,
            description=jsonify({"success": True, "message": "密码更新成功"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )
    except Exception as e:
        return Response(
            status_code=500,
            description=jsonify({"success": False, "message": f"密码更新失败: {str(e)}"}),
            headers={"Content-Type": "application/json; charset=utf-8"}
        )

@app.after_request("/")
def add_cors_headers(response):
    """添加CORS头，支持跨域请求"""
    response.headers.update({
        "Access-Control-Allow-Origin": "*",
        "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
        "Access-Control-Allow-Headers": "Content-Type, Authorization, X-Requested-With"
    })
    return response