import { Head, useForm } from "@inertiajs/react";
import { FormEventHandler, useEffect } from "react";
import { cn } from "@/lib/utils";
import { Button } from "@/Components/ui/button";
import { Input } from "@/Components/ui/input";
import { Label } from "@/Components/ui/label";
import InputError from "../../Components/InputError";
import ApplicationLogo from "../../Components/ApplicationLogo";

export default function Login() {
    const { data, setData, post, processing, errors, reset } = useForm({
        username: localStorage.getItem("saved_username") || "",
        password: "",
        remember: false,
        rememberUsername: localStorage.getItem("remember_username") === "true",
    });

    useEffect(() => {
        return () => {
            reset("password");
        };
    }, []);

    const submit: FormEventHandler = (e) => {
        e.preventDefault();

        // 處理記住帳號邏輯
        if (data.rememberUsername) {
            localStorage.setItem("saved_username", data.username);
            localStorage.setItem("remember_username", "true");
        } else {
            localStorage.removeItem("saved_username");
            localStorage.setItem("remember_username", "false");
        }

        post(route("login"), {
            onFinish: () => reset("password"),
        });
    };

    return (
        <div className="min-h-screen flex items-center justify-center bg-gray-50 relative overflow-hidden">
            <Head title="登入" />

            {/* 動態背景裝飾 */}
            <div className="absolute top-0 -left-4 w-72 h-72 bg-purple-300 rounded-full mix-blend-multiply filter blur-xl opacity-70 animate-blob"></div>
            <div className="absolute top-0 -right-4 w-72 h-72 bg-yellow-300 rounded-full mix-blend-multiply filter blur-xl opacity-70 animate-blob animation-delay-2000"></div>
            <div className="absolute -bottom-8 left-20 w-72 h-72 bg-pink-300 rounded-full mix-blend-multiply filter blur-xl opacity-70 animate-blob animation-delay-4000"></div>

            <div className="w-full max-w-md p-8 relative z-10">
                <div className="flex flex-col items-center mb-6">
                    <ApplicationLogo className="w-40 h-40 object-contain" />
                </div>
                <div className="glass-panel p-8 rounded-2xl shadow-xl bg-white/80 backdrop-blur-md border border-white/50">
                    <form onSubmit={submit} className="space-y-6">
                        <div>
                            <Label htmlFor="username">帳號</Label>
                            <Input
                                id="username"
                                type="text"
                                className="mt-1 block w-full bg-white/50"
                                value={data.username}
                                onChange={(e) => setData("username", e.target.value)}
                                required
                                autoFocus
                            />
                            <InputError message={errors.username} className="mt-2" />
                        </div>

                        <div>
                            <Label htmlFor="password">密碼</Label>
                            <Input
                                id="password"
                                type="password"
                                className="mt-1 block w-full bg-white/50"
                                value={data.password}
                                onChange={(e) => setData("password", e.target.value)}
                                required
                            />
                            <InputError message={errors.password} className="mt-2" />
                        </div>

                        <div className="flex items-center justify-between">
                            <label className="flex items-center cursor-pointer group">
                                <div className="relative">
                                    <input
                                        type="checkbox"
                                        className="sr-only"
                                        checked={data.rememberUsername}
                                        onChange={(e) => setData("rememberUsername", e.target.checked)}
                                    />
                                    <div className={cn(
                                        "w-9 h-5 rounded-full shadow-inner transition-colors duration-300 ease-in-out",
                                        data.rememberUsername ? "bg-[#01ab83]" : "bg-gray-300"
                                    )}></div>
                                    <div className={cn(
                                        "absolute left-0.5 top-0.5 w-4 h-4 bg-white rounded-full shadow transition-transform duration-300 ease-in-out",
                                        data.rememberUsername ? "translate-x-4" : "translate-x-0"
                                    )}></div>
                                </div>
                                <span className="ml-2 text-sm text-gray-600 group-hover:text-gray-900 transition-colors">記住帳號</span>
                            </label>

                            <label className="flex items-center cursor-pointer group">
                                <span className="mr-2 text-sm text-gray-600 group-hover:text-gray-900 transition-colors">保持登入</span>
                                <div className="relative">
                                    <input
                                        type="checkbox"
                                        className="sr-only"
                                        checked={data.remember}
                                        onChange={(e) => setData("remember", e.target.checked)}
                                    />
                                    <div className={cn(
                                        "w-9 h-5 rounded-full shadow-inner transition-colors duration-300 ease-in-out",
                                        data.remember ? "bg-[#01ab83]" : "bg-gray-300"
                                    )}></div>
                                    <div className={cn(
                                        "absolute left-0.5 top-0.5 w-4 h-4 bg-white rounded-full shadow transition-transform duration-300 ease-in-out",
                                        data.remember ? "translate-x-4" : "translate-x-0"
                                    )}></div>
                                </div>
                            </label>
                        </div>

                        <Button
                            className="w-full h-11 text-base bg-[#01ab83] hover:bg-[#018a6a] transition-all shadow-lg hover:shadow-xl"
                            disabled={processing}
                        >
                            {processing ? "登入中..." : "登入系統"}
                        </Button>
                    </form>
                </div>

                <p className="text-center text-gray-400 text-sm mt-8">
                    &copy; 2026 小小冰室. All rights reserved.
                </p>
            </div>
        </div>
    );
}
