// lib/auth.ts

import { PrismaAdapter } from "@auth/prisma-adapter";
import { prisma } from "./database";
import GoogleProvider from "next-auth/providers/google";
import CredentialsProvider from "next-auth/providers/credentials";
import { UserService } from "./services/user.service";
import { AuthOptions } from "next-auth";

// 验证和清理 NEXTAUTH_URL
function getValidatedNextAuthUrl(): string {
  const url = process.env.NEXTAUTH_URL;
  if (!url) {
    throw new Error("NEXTAUTH_URL 环境变量未设置");
  }
  
  // 清理 URL，移除多余的引号
  let cleanUrl = url.trim();
  if (cleanUrl.startsWith('"') && cleanUrl.endsWith('"')) {
    cleanUrl = cleanUrl.slice(1, -1);
  }
  if (cleanUrl.startsWith("'") && cleanUrl.endsWith("'")) {
    cleanUrl = cleanUrl.slice(1, -1);
  }
  
  // 确保 URL 格式正确
  try {
    new URL(cleanUrl);
  } catch (error) {
    throw new Error(`无效的 NEXTAUTH_URL: ${cleanUrl}`);
  }
  
  return cleanUrl;
}

// 获取域名用于 Cookie 配置
function getDomain(): string {
  const url = getValidatedNextAuthUrl();
  try {
    const urlObj = new URL(url);
    return urlObj.hostname;
  } catch {
    return "recorder.zyj.best"; // 默认域名
  }
}

export const authOptions: AuthOptions = {
  adapter: PrismaAdapter(prisma),

  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_CLIENT_ID!,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET!,
    }),

    CredentialsProvider({
      name: "Credentials",
      credentials: {
        email: { label: "Email", type: "text" },
        password: { label: "Password", type: "password" },
      },
      async authorize(credentials) {
        if (!credentials?.email || !credentials?.password) {
          throw new Error("请输入邮箱和密码");
        }

        try {
          const user = await UserService.getUserByEmail(credentials.email);

          if (!user || !user.hashedPassword) {
            throw new Error("用户不存在或未设置密码");
          }

          const isPasswordValid = await UserService.verifyPassword(
            user,
            credentials.password
          );

          if (!isPasswordValid) {
            throw new Error("密码错误");
          }

          return user;
        } catch (error) {
          throw error;
        }
      },
    }),
  ],

  session: {
    strategy: "jwt",
  },

  callbacks: {
    async jwt({ token, user, account }) {
      if (user) {
        token.id = user.id;
        token.email = user.email;
        token.name = user.name;
      }
      return token;
    },

    async session({ session, token }) {
      if (token?.id && session.user) {
        session.user.id = token.id as string;
        session.user.email = token.email as string;
        session.user.name = token.name as string;
      }
      return session;
    },

    async signIn({ user, account, profile }) {
      // 允许所有用户登录
      return true;
    },

    async redirect({ url, baseUrl }) {
      // 确保重定向到正确的页面
      if (url.startsWith("/")) return `${baseUrl}${url}`;
      else if (new URL(url).origin === baseUrl) return url;
      return `${baseUrl}/dashboard`;
    },
  },

  pages: {
    signIn: "/login",
  },

  secret: process.env.NEXTAUTH_SECRET,

  debug: process.env.NODE_ENV === "development",
  
  // 添加 Cookie 配置
  cookies: {
    sessionToken: {
      name: `next-auth.session-token`,
      options: {
        httpOnly: true,
        sameSite: "lax",
        path: "/",
        secure: process.env.NODE_ENV === "production",
        domain: process.env.NODE_ENV === "production" ? getDomain() : undefined,
      },
    },
    callbackUrl: {
      name: `next-auth.callback-url`,
      options: {
        sameSite: "lax",
        path: "/",
        secure: process.env.NODE_ENV === "production",
        domain: process.env.NODE_ENV === "production" ? getDomain() : undefined,
      },
    },
    csrfToken: {
      name: `next-auth.csrf-token`,
      options: {
        httpOnly: true,
        sameSite: "lax",
        path: "/",
        secure: process.env.NODE_ENV === "production",
        domain: process.env.NODE_ENV === "production" ? getDomain() : undefined,
      },
    },
    pkceCodeVerifier: {
      name: `next-auth.pkce.code_verifier`,
      options: {
        httpOnly: true,
        sameSite: "lax",
        path: "/",
        maxAge: 900,
        secure: process.env.NODE_ENV === "production",
        domain: process.env.NODE_ENV === "production" ? getDomain() : undefined,
      },
    },
    state: {
      name: `next-auth.state`,
      options: {
        httpOnly: true,
        sameSite: "lax",
        path: "/",
        maxAge: 900,
        secure: process.env.NODE_ENV === "production",
        domain: process.env.NODE_ENV === "production" ? getDomain() : undefined,
      },
    },
    nonce: {
      name: `next-auth.nonce`,
      options: {
        httpOnly: true,
        sameSite: "lax",
        path: "/",
        secure: process.env.NODE_ENV === "production",
        domain: process.env.NODE_ENV === "production" ? getDomain() : undefined,
      },
    },
  },
};