"use client";

import {useState, useEffect} from "react";
import {useToast} from "@/components/ui/toast";
import {Loader2} from "lucide-react";
import {Button} from "@/components/ui/button";

interface DBConfig {
    host: string;
    port: number;
    user: string;
    password: string;
    database: string;
}

const defaultDBConfig: DBConfig = {
    host: "127.0.0.1",
    port: 3306,
    user: "root",
    password: "",
    database: "recipe_tools",
};

export default function DatabasePage() {
    const [config, setConfig] = useState<DBConfig>(defaultDBConfig);
    const [loading, setLoading] = useState(true);
    const [saving, setSaving] = useState(false);
    const {addToast} = useToast();

    useEffect(() => {
        fetch("/api/config")
            .then((res) => res.json())
            .then((result) => {
                if (result.success && result.data) {
                    setConfig({
                        host: result.data.db?.host || defaultDBConfig.host,
                        port: result.data.db?.port || defaultDBConfig.port,
                        user: result.data.db?.user || defaultDBConfig.user,
                        password: result.data.db?.password || defaultDBConfig.password,
                        database: result.data.db?.database || defaultDBConfig.database,
                    });
                }
            })
            .catch(console.error)
            .finally(() => setLoading(false));
    }, []);

    const handleSave = async () => {
        setSaving(true);
        try {
            const response = await fetch("/api/config", {
                method: "POST",
                headers: {"Content-Type": "application/json"},
                body: JSON.stringify({db: config}),
            });
            const result = await response.json();
            if (result.success) {
                addToast({type: "success", title: "数据库配置已保存"});
            } else {
                addToast({type: "error", title: "保存失败", description: result.error});
            }
        } catch {
            addToast({type: "error", title: "保存失败"});
        } finally {
            setSaving(false);
        }
    };

    if (loading) {
        return (
            <div className="space-y-6">
                <div>
                    <h2 className="text-lg font-semibold">数据库配置</h2>
                    <p className="text-sm text-muted-foreground">配置 MySQL 数据库连接信息</p>
                </div>
                <div className="h-40 animate-pulse rounded-lg bg-muted"/>
            </div>
        );
    }

    return (
        <div className="space-y-6">
            <div className={"flex items-center justify-between"}>
                <div>
                    <h2 className="text-lg font-semibold">数据库配置</h2>
                    <p className="text-sm text-muted-foreground">配置 MySQL 数据库连接信息</p>
                </div>
                <div className="flex gap-3">
                    <Button onClick={handleSave} disabled={saving}>
                        {saving && <Loader2 className="mr-2 h-4 w-4 animate-spin"/>}
                        {saving ? "保存中..." : "保存配置"}
                    </Button>
                </div>
            </div>

            <div className="grid gap-4 md:grid-cols-2">
                <div className="space-y-2">
                    <label className="text-sm font-medium">主机地址</label>
                    <input
                        type="text"
                        value={config.host}
                        onChange={(e) => setConfig({...config, host: e.target.value})}
                        className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                        placeholder="127.0.0.1"
                    />
                </div>
                <div className="space-y-2">
                    <label className="text-sm font-medium">端口</label>
                    <input
                        type="text"
                        value={config.port}
                        onChange={(e) => setConfig({...config, port: parseInt(e.target.value) || 3306})}
                        className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                        placeholder="3306"
                    />
                </div>
                <div className="space-y-2">
                    <label className="text-sm font-medium">用户名</label>
                    <input
                        type="text"
                        value={config.user}
                        onChange={(e) => setConfig({...config, user: e.target.value})}
                        className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                        placeholder="root"
                    />
                </div>
                <div className="space-y-2">
                    <label className="text-sm font-medium">密码</label>
                    <input
                        type="password"
                        value={config.password}
                        onChange={(e) => setConfig({...config, password: e.target.value})}
                        className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                        placeholder="******"
                    />
                </div>
                <div className="space-y-2 md:col-span-2">
                    <label className="text-sm font-medium">数据库名称</label>
                    <input
                        type="text"
                        value={config.database}
                        onChange={(e) => setConfig({...config, database: e.target.value})}
                        className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                        placeholder="recipe_tools"
                    />
                </div>
            </div>


        </div>
    );
}