<?php

namespace App\Filament\Tenant\Pages;

use App\Models\Tenant\Appointment;
use App\Models\Tenant\Client;
use App\Models\Tenant\Post;
use App\Models\Tenant\User;
use App\Models\Tenant\Vehicle;
use Carbon\Carbon;
use Filament\Forms;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use Filament\Schemas;
use Filament\Schemas\Schema;

class CalendarBoard extends Page
{
    protected static string|\BackedEnum|null $navigationIcon = 'heroicon-o-calendar-days';

    protected static ?string $navigationLabel = 'Calendar vizual';

    protected static string|\UnitEnum|null $navigationGroup = 'CRM';

    protected static ?int $navigationSort = 8;

    protected static ?string $title = 'Calendar';

    protected string $view = 'filament.tenant.pages.calendar';

    public ?array $createData = [];

    public ?array $editData = [];

    public ?int $editId = null;

    /** Register all forms used by this page (Filament v5 multi-form pattern). */
    protected function getForms(): array
    {
        return ['createForm'];
    }

    public function getEvents(string $start, string $end): array
    {
        return Appointment::with(['client:id,name', 'vehicle:id,plate,make,model', 'master:id,name,color', 'post:id,name,color'])
            ->whereBetween('date', [$start, $end])
            ->get()
            ->map(fn (Appointment $a) => [
                'id' => $a->id,
                'title' => trim($a->title ?: ($a->client?->name ?? '—')),
                'start' => $a->date->format('Y-m-d') . 'T' . ($a->time_start ?? '08:00:00'),
                'end' => $a->date->format('Y-m-d') . 'T' . ($a->time_end ?? '09:00:00'),
                'backgroundColor' => $a->color ?: ($a->master?->color ?? '#3b82f6'),
                'borderColor' => $a->color ?: ($a->master?->color ?? '#3b82f6'),
                'extendedProps' => [
                    'client' => $a->client?->name,
                    'vehicle' => trim(($a->vehicle?->make ?? '') . ' ' . ($a->vehicle?->model ?? '')),
                    'plate' => $a->vehicle?->plate,
                    'master' => $a->master?->name,
                    'post' => $a->post?->name,
                    'status' => $a->status,
                    'notes' => $a->notes,
                ],
            ])->all();
    }

    /** Drag-drop reschedule. */
    public function moveEvent(int $id, string $start, string $end): void
    {
        $a = Appointment::find($id);
        if (! $a) return;

        [$startDate, $startTime] = $this->splitIso($start);
        [, $endTime] = $this->splitIso($end);

        $a->update([
            'date' => $startDate,
            'time_start' => $startTime,
            'time_end' => $endTime,
        ]);

        Notification::make()
            ->title('Programare mutată')
            ->body($a->title . ' → ' . $startDate . ' ' . substr($startTime, 0, 5))
            ->success()->send();

        $this->dispatch('events-changed');
    }

    public function quickCreate(string $start, string $end): void
    {
        $this->createData = [
            'date' => substr($start, 0, 10),
            'time_start' => substr($start, 11, 5),
            'time_end' => substr($end, 11, 5),
        ];
        $this->createForm->fill($this->createData);
        $this->dispatch('open-create-modal');
    }

    public function createForm(Schema $schema): Schema
    {
        return $schema->components([
            Forms\Components\Hidden::make('date'),
            Forms\Components\TextInput::make('title')->label('Subiect')->required(),
            Schemas\Components\Section::make('Când')
                ->columns(2)
                ->schema([
                    Forms\Components\TimePicker::make('time_start')->label('De la')->seconds(false)->required(),
                    Forms\Components\TimePicker::make('time_end')->label('Până la')->seconds(false)->required(),
                ]),
            Schemas\Components\Section::make('Cine')
                ->columns(2)
                ->schema([
                    Forms\Components\Select::make('client_id')->label('Client')
                        ->options(fn () => Client::pluck('name', 'id'))
                        ->searchable()
                        ->live(),
                    Forms\Components\Select::make('vehicle_id')->label('Auto')
                        ->options(fn (\Filament\Schemas\Components\Utilities\Get $get) => $get('client_id')
                            ? Vehicle::where('client_id', $get('client_id'))->pluck('plate', 'id')
                            : []),
                    Forms\Components\Select::make('master_id')->label('Maistru')
                        ->options(fn () => User::where('status', 'active')->pluck('name', 'id'))
                        ->searchable(),
                    Forms\Components\Select::make('post_id')->label('Pod')
                        ->options(fn () => Post::where('is_active', true)->pluck('name', 'id'))
                        ->searchable(),
                ]),
            Forms\Components\Textarea::make('notes')->rows(2),
        ])->statePath('createData');
    }

    public function saveCreate(): void
    {
        $data = $this->createForm->getState();
        Appointment::create([
            'date' => $data['date'],
            'time_start' => $data['time_start'],
            'time_end' => $data['time_end'],
            'title' => $data['title'],
            'client_id' => $data['client_id'] ?? null,
            'vehicle_id' => $data['vehicle_id'] ?? null,
            'master_id' => $data['master_id'] ?? null,
            'post_id' => $data['post_id'] ?? null,
            'notes' => $data['notes'] ?? null,
            'status' => 'scheduled',
        ]);
        $this->createData = [];
        Notification::make()->title('Programare adăugată')->success()->send();
        $this->dispatch('close-create-modal');
        $this->dispatch('events-changed');
    }

    public function deleteEvent(int $id): void
    {
        Appointment::where('id', $id)->delete();
        Notification::make()->title('Programare ștearsă')->success()->send();
        $this->dispatch('events-changed');
    }

    protected function splitIso(string $iso): array
    {
        // "2026-05-07T10:30:00" → ["2026-05-07", "10:30:00"]
        if (str_contains($iso, 'T')) {
            return explode('T', $iso);
        }
        return [substr($iso, 0, 10), substr($iso, 11) ?: '08:00:00'];
    }
}