"use client";

import { client } from "@/lib/auth-client";
import { Button } from "@nice/ui/components/button";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@nice/ui/components/card";
import { Input } from "@nice/ui/components/input";
import { Label } from "@nice/ui/components/label";
import { toast } from "@nice/ui/components/sonner";
import { useState } from "react";
import { useRouter, useSearchParams } from "next/navigation";

export default function SignInPage() {
    const [credentials, setCredentials] = useState({
        email: "test@example.com",
        password: "password123"
    });
    const [isLoading, setIsLoading] = useState(false);
    const router = useRouter();
    const searchParams = useSearchParams();
    // 检查是否是从 OIDC Provider 重定向过来的
    const isOIDCFlow = searchParams.get('response_type') === 'code' || searchParams.get('client_id');



    const handleSignIn = async (e: React.FormEvent) => {
        e.preventDefault();
        setIsLoading(true);

        try {
            const result = await client.signIn.email({
                email: credentials.email,
                password: credentials.password,
            });

            if (result.data) {
                toast.success("登录成功！");

                // 如果是 OIDC 流程，重定向回原始请求
                if (isOIDCFlow) {
                    // 获取所有查询参数并重建 URL
                    const params = new URLSearchParams(window.location.search);
                    const redirectUrl = `http://localhost:3001/api/auth/oauth2/authorize?${params.toString()}`;
                    window.location.href = redirectUrl;
                } else {
                    router.push('/dashboard');
                }
            } else if (result.error) {
                toast.error(`登录失败: ${result.error.message}`);
            }
        } catch (error: any) {
            console.error("登录失败:", error);
            toast.error(`登录失败: ${error.message || "未知错误"}`);
        } finally {
            setIsLoading(false);
        }
    };

    const handleCreateTestUser = async () => {
        setIsLoading(true);
        try {
            // 使用更详细的用户信息
            const result = await client.signUp.email({
                email: credentials.email,
                password: credentials.password,
                name: "Test User",
            });

            if (result.data) {
                toast.success("测试用户创建成功！可以使用此账户登录");
            } else if (result.error) {
                // 显示更详细的错误信息
                console.error("注册错误详情:", result.error);

                // 检查是否是重定向URI错误（这通常不应该出现在注册流程中）
                if (result.error.code === 'INVALID_REDIRECT_URI') {
                    toast.error("OAuth配置错误：重定向URI无效，请检查后端配置");
                } else {
                    const errorMessage = result.error.message || "未知错误";
                    if (errorMessage.includes("already exists")) {
                        toast.error("该邮箱已被注册，请直接登录");
                    } else {
                        toast.error(`创建失败: ${errorMessage}`);
                    }
                }
            }
        } catch (error: any) {
            console.error("创建用户失败:", error);
            // 显示更详细的错误信息
            if (error.response) {
                console.error("响应状态:", error.response.status);
                console.error("响应数据:", error.response.data);
            }
            toast.error(`创建用户失败: ${error.message || "未知错误"}`);
        } finally {
            setIsLoading(false);
        }
    };

    return (
        <div className="container mx-auto p-6 max-w-md">
            <Card>
                <CardHeader className="text-center">
                    <CardTitle className="text-2xl">登录</CardTitle>
                    <CardDescription>
                        {isOIDCFlow ? (
                            <span>OIDC Provider 授权登录</span>
                        ) : (
                            <span>请登录您的账户</span>
                        )}
                    </CardDescription>
                </CardHeader>
                <CardContent>
                    {isOIDCFlow && (
                        <div className="mb-4 p-3 bg-blue-50 dark:bg-blue-950 rounded-md">
                            <p className="text-sm text-blue-800 dark:text-blue-200">
                                检测到 OIDC 授权流程。登录后将继续完成授权。
                            </p>
                        </div>
                    )}

                    <form onSubmit={handleSignIn} className="space-y-4">
                        <div className="space-y-2">
                            <Label htmlFor="email">邮箱</Label>
                            <Input
                                id="email"
                                type="email"
                                value={credentials.email}
                                onChange={(e) => setCredentials({ ...credentials, email: e.target.value })}
                                disabled={isLoading}
                                required
                            />
                        </div>

                        <div className="space-y-2">
                            <Label htmlFor="password">密码</Label>
                            <Input
                                id="password"
                                type="password"
                                value={credentials.password}
                                onChange={(e) => setCredentials({ ...credentials, password: e.target.value })}
                                disabled={isLoading}
                                required
                            />
                        </div>

                        <Button type="submit" className="w-full" disabled={isLoading}>
                            {isLoading ? "登录中..." : "登录"}
                        </Button>
                    </form>

                    <div className="mt-6 pt-4 border-t">
                        <p className="text-sm text-muted-foreground mb-2">测试功能:</p>
                        <div className="space-y-2">
                            <Button
                                onClick={handleCreateTestUser}
                                variant="outline"
                                className="w-full"
                                disabled={isLoading}
                            >
                                创建测试用户
                            </Button>

                        </div>
                    </div>



                    {isOIDCFlow && (
                        <div className="mt-4">
                            <Button
                                onClick={() => router.push('/test')}
                                variant="ghost"
                                className="w-full"
                            >
                                返回测试页面
                            </Button>
                        </div>
                    )}
                </CardContent>
            </Card>
        </div>
    );
}