'use client';

import { useState } from 'react';
import { SettingsSection } from './SettingsSection';
import { Trash2, Plus, Eye, EyeOff, Shield, ShieldCheck } from 'lucide-react';
import { Switch } from '@/components/ui/Switch';

interface PasswordSettingsProps {
    enabled: boolean;
    passwords: string[];
    envPasswordSet: boolean;
    onToggle: (enabled: boolean) => void;
    onAdd: (password: string) => void;
    onRemove: (password: string) => void;
}

export function PasswordSettings({
    enabled,
    passwords,
    envPasswordSet,
    onToggle,
    onAdd,
    onRemove,
}: PasswordSettingsProps) {
    const [newPassword, setNewPassword] = useState('');
    const [error, setError] = useState('');
    const [showPassword, setShowPassword] = useState(false);

    const handleAdd = (e: React.FormEvent) => {
        e.preventDefault();
        if (!newPassword) return;

        if (passwords.includes(newPassword)) {
            setError('密码已存在');
            return;
        }

        onAdd(newPassword);
        setNewPassword('');
        setError('');
    };

    // If env password is set, access control is automatically enabled
    const isActive = enabled || envPasswordSet;

    return (
        <SettingsSection title="访问控制" description="为应用启用密码保护功能。">
            <div className="space-y-6">
                {/* Toggle - only shown if no env password */}
                {!envPasswordSet && (
                    <div className="flex items-center justify-between">
                        <label className="text-sm font-medium text-[var(--text-color)]">
                            启用密码访问
                        </label>
                        <Switch
                            checked={enabled}
                            onChange={onToggle}
                            ariaLabel="启用密码访问开关"
                        />
                    </div>
                )}

                {/* Env Password Notice */}
                {envPasswordSet && (
                    <div className="flex items-center gap-3 p-4 bg-[color-mix(in_srgb,var(--accent-color)_10%,transparent)] border border-[var(--accent-color)]/30 rounded-[var(--radius-2xl)]">
                        <ShieldCheck className="text-[var(--accent-color)] shrink-0" size={24} />
                        <div>
                            <p className="text-sm font-medium text-[var(--text-color)]">
                                环境变量密码已启用
                            </p>
                            <p className="text-xs text-[var(--text-color-secondary)]">
                                通过 <code className="px-1 py-0.5 bg-[var(--glass-bg)] rounded">ACCESS_PASSWORD</code> 环境变量设置，无法在此删除
                            </p>
                        </div>
                    </div>
                )}

                {isActive && (
                    <div className="space-y-4 pt-4 border-t border-[var(--glass-border)] animate-in fade-in slide-in-from-top-2">
                        {/* Local Passwords Section */}
                        <div className="space-y-2">
                            <div className="flex items-center gap-2">
                                <Shield size={16} className="text-[var(--text-color-secondary)]" />
                                <h4 className="text-sm font-medium text-[var(--text-color)]">本地保存密码</h4>
                            </div>
                            <p className="text-xs text-[var(--text-color-secondary)]">
                                仅在当前浏览器/设备有效，可随时添加或删除
                            </p>

                            {passwords.length === 0 && !envPasswordSet && (
                                <p className="text-sm text-[var(--text-color-secondary)] italic">
                                    未设置本地密码。在至少添加一个密码之前，任何人都可以访问。
                                </p>
                            )}

                            {passwords.length === 0 && envPasswordSet && (
                                <p className="text-sm text-[var(--text-color-secondary)] italic">
                                    暂无本地密码。可以添加额外的本地密码作为备用。
                                </p>
                            )}

                            <div className="flex flex-wrap gap-2">
                                {passwords.map((pwd, index) => (
                                    <div
                                        key={index}
                                        className="flex items-center gap-2 px-3 py-1.5 bg-[var(--glass-bg)] border border-[var(--glass-border)] rounded-[var(--radius-full)] text-sm transition-all duration-300 hover:scale-105"
                                    >
                                        <span className="font-mono">{showPassword ? pwd : '••••••'}</span>
                                        <button
                                            onClick={() => onRemove(pwd)}
                                            className="text-[var(--text-color-secondary)] hover:text-red-500 transition-colors cursor-pointer"
                                            title="删除密码"
                                        >
                                            <Trash2 size={14} />
                                        </button>
                                    </div>
                                ))}
                            </div>
                        </div>

                        <form onSubmit={handleAdd} className="flex gap-2 items-start">
                            <div className="flex-1 space-y-1">
                                <div className="relative">
                                    <input
                                        type={showPassword ? "text" : "password"}
                                        value={newPassword}
                                        onChange={(e) => {
                                            setNewPassword(e.target.value);
                                            setError('');
                                        }}
                                        placeholder="添加新的本地密码..."
                                        className="w-full px-4 py-2 pr-10 rounded-[var(--radius-2xl)] bg-[var(--glass-bg)] border border-[var(--glass-border)] focus:outline-none focus:border-[var(--accent-color)] focus:shadow-[0_0_0_3px_color-mix(in_srgb,var(--accent-color)_30%,transparent)] transition-all duration-[0.4s] cubic-bezier(0.2,0.8,0.2,1) text-sm"
                                    />
                                    <button
                                        type="button"
                                        onClick={() => setShowPassword(!showPassword)}
                                        className="absolute right-3 top-1/2 -translate-y-1/2 text-[var(--text-color-secondary)] hover:text-[var(--text-color)] transition-colors cursor-pointer"
                                    >
                                        {showPassword ? <EyeOff size={16} /> : <Eye size={16} />}
                                    </button>
                                </div>
                                {error && <p className="text-xs text-red-500 pl-2">{error}</p>}
                            </div>
                            <button
                                type="submit"
                                disabled={!newPassword}
                                className="p-2 bg-[var(--accent-color)] text-white rounded-[var(--radius-2xl)] hover:translate-y-[-2px] hover:brightness-110 shadow-[var(--shadow-sm)] hover:shadow-[0_4px_8px_var(--shadow-color)] disabled:opacity-50 disabled:cursor-not-allowed disabled:transform-none disabled:shadow-none transition-all duration-200 cursor-pointer"
                            >
                                <Plus size={20} />
                            </button>
                        </form>
                    </div>
                )}
            </div>
        </SettingsSection>
    );
}