<?php

namespace App\Filament\Resources;

use App\Filament\Resources\UserResource\Pages;
use App\Filament\Resources\UserResource\RelationManagers;
use App\Models\User;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\SoftDeletingScope;

class UserResource extends Resource
{
    protected static ?string $model = User::class;

    protected static ?string $navigationIcon = 'heroicon-o-users';

    protected static ?string $navigationLabel = '用户管理';

    protected static ?string $modelLabel = '用户';

    protected static ?string $pluralModelLabel = '用户';

    protected static ?int $navigationSort = 3;

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Section::make('基本信息')
                    ->schema([
                        Forms\Components\TextInput::make('name')
                            ->label('用户名称')
                            ->required()
                            ->maxLength(255)
                            ->placeholder('请输入用户名称'),
                        Forms\Components\TextInput::make('email')
                            ->label('邮箱')
                            ->email()
                            ->required()
                            ->maxLength(255)
                            ->placeholder('请输入邮箱地址'),
                        Forms\Components\TextInput::make('password')
                            ->label('密码')
                            ->password()
                            ->required(fn (string $context): bool => $context === 'create')
                            ->dehydrated(fn ($state) => filled($state))
                            ->minLength(8)
                            ->placeholder('请输入密码（至少8位）')
                            ->helperText('编辑时留空表示不修改密码'),
                    ])
                    ->columns(2),

                Forms\Components\Section::make('分组与角色')
                    ->schema([
                        Forms\Components\Select::make('groups')
                            ->label('所属分组')
                            ->multiple()
                            ->relationship('groups', 'name')
                            ->preload()
                            ->placeholder('请选择用户所属的分组')
                            ->helperText('用户可以属于多个分组'),
                        Forms\Components\Select::make('roles')
                            ->label('角色')
                            ->multiple()
                            ->relationship('roles', 'name')
                            ->preload()
                            ->placeholder('请选择用户角色')
                            ->helperText('角色决定用户的基础权限')
                            ->searchable(),
                    ])
                    ->columns(2),

                Forms\Components\Section::make('直接权限')
                    ->description('为用户分配额外的权限，这些权限会叠加到角色权限之上')
                    ->schema([
                        Forms\Components\CheckboxList::make('permissions')
                            ->label('权限列表')
                            ->relationship('permissions', 'name')
                            ->columns(3)
                            ->gridDirection('row')
                            ->options(function () {
                                return \Spatie\Permission\Models\Permission::all()
                                    ->groupBy(function ($permission) {
                                        return explode('.', $permission->name)[0];
                                    })
                                    ->map(function ($permissions, $module) {
                                        $moduleNames = [
                                            'document' => '文档管理',
                                            'sop' => 'SOP模板',
                                            'terminal' => '终端管理',
                                            'user' => '用户管理',
                                            'role' => '角色管理',
                                            'group' => '分组管理',
                                            'system' => '系统设置',
                                            'activity' => '操作日志',
                                        ];
                                        return $permissions->pluck('name', 'name')
                                            ->mapWithKeys(function ($name) use ($moduleNames) {
                                                $parts = explode('.', $name);
                                                $module = $parts[0];
                                                $action = $parts[1] ?? '';
                                                $actionNames = [
                                                    'view' => '查看',
                                                    'create' => '创建',
                                                    'update' => '编辑',
                                                    'delete' => '删除',
                                                    'export' => '导出',
                                                    'import' => '导入',
                                                    'publish' => '发布',
                                                    'archive' => '归档',
                                                    'download' => '下载',
                                                    'sync' => '同步',
                                                ];
                                                $label = ($moduleNames[$module] ?? $module) . ' - ' . ($actionNames[$action] ?? $action);
                                                return [$name => $label];
                                            });
                                    })
                                    ->flatten()
                                    ->toArray();
                            })
                            ->searchable()
                            ->bulkToggleable(),
                    ])
                    ->collapsible()
                    ->collapsed(),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('id')
                    ->label('ID')
                    ->sortable(),
                Tables\Columns\TextColumn::make('name')
                    ->label('用户名称')
                    ->searchable()
                    ->sortable(),
                Tables\Columns\TextColumn::make('email')
                    ->label('邮箱')
                    ->searchable()
                    ->sortable(),
                Tables\Columns\TextColumn::make('roles.name')
                    ->label('角色')
                    ->badge()
                    ->color(fn (string $state): string => match ($state) {
                        'super-admin' => 'danger',
                        'admin' => 'warning',
                        'user' => 'success',
                        default => 'gray',
                    })
                    ->formatStateUsing(fn (string $state): string => match ($state) {
                        'super-admin' => '超级管理员',
                        'admin' => '管理员',
                        'user' => '普通用户',
                        default => $state,
                    })
                    ->searchable()
                    ->toggleable(),
                Tables\Columns\TextColumn::make('groups.name')
                    ->label('所属分组')
                    ->badge()
                    ->searchable()
                    ->toggleable(),
                Tables\Columns\TextColumn::make('permissions_count')
                    ->label('权限数量')
                    ->counts('permissions')
                    ->sortable()
                    ->toggleable(),
                Tables\Columns\TextColumn::make('created_at')
                    ->label('创建时间')
                    ->dateTime('Y-m-d H:i:s')
                    ->sortable()
                    ->toggleable(),
                Tables\Columns\TextColumn::make('updated_at')
                    ->label('更新时间')
                    ->dateTime('Y-m-d H:i:s')
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                Tables\Filters\SelectFilter::make('roles')
                    ->label('角色')
                    ->relationship('roles', 'name')
                    ->multiple()
                    ->preload(),
            ])
            ->actions([
                Tables\Actions\ViewAction::make()
                    ->label('查看'),
                Tables\Actions\EditAction::make()
                    ->label('编辑'),
                Tables\Actions\DeleteAction::make()
                    ->label('删除')
                    ->before(function (Tables\Actions\DeleteAction $action, User $record) {
                        // 防止删除超级管理员
                        if ($record->isSuperAdmin()) {
                            \Filament\Notifications\Notification::make()
                                ->danger()
                                ->title('无法删除')
                                ->body('不能删除超级管理员账户')
                                ->send();
                            $action->cancel();
                        }
                    }),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make()
                        ->label('批量删除')
                        ->before(function (Tables\Actions\DeleteBulkAction $action, $records) {
                            // 检查是否包含超级管理员
                            $hasSuperAdmin = $records->contains(fn ($record) => $record->isSuperAdmin());
                            if ($hasSuperAdmin) {
                                \Filament\Notifications\Notification::make()
                                    ->danger()
                                    ->title('无法删除')
                                    ->body('选中的用户中包含超级管理员，无法批量删除')
                                    ->send();
                                $action->cancel();
                            }
                        }),
                ]),
            ])
            ->defaultSort('created_at', 'desc');
    }

    public static function getRelations(): array
    {
        return [
            RelationManagers\GroupsRelationManager::class,
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListUsers::route('/'),
            'create' => Pages\CreateUser::route('/create'),
            'view' => Pages\ViewUser::route('/{record}'),
            'edit' => Pages\EditUser::route('/{record}/edit'),
        ];
    }
}