<?php

namespace Database\Seeders;

use App\Models\ActivityLog;
use App\Models\Equipment;
use App\Models\Priority;
use App\Models\RequestComment;
use App\Models\RequestType;
use App\Models\ServiceRequest;
use App\Models\Status;
use App\Models\User;
use Illuminate\Database\Seeder;

class ServiceRequestSeeder extends Seeder
{
    public function run(): void
    {
        $types      = RequestType::query()->get();
        $priorities = Priority::query()->orderBy('level')->get();
        $statuses   = Status::query()->get()->keyBy('slug');
        $clients    = User::query()->where('role', 'client')->get();
        $techs      = User::query()->where('role', 'technician')->get();
        $equipment  = Equipment::query()->get();

        // Распределение: 10 активных, 8 в ожидании/в работе с дедлайном сегодня-завтра,
        // 4 решённых, 3 закрытых.
        $buckets = [
            // [slug, count, deadline_offset_hours от now]
            ['new',         4,  [+48, +168]],  // новые — дедлайн через 2-7 дней
            ['in_progress', 6,  [+4,  +48]],   // в работе — дедлайн через 4-48 ч
            ['waiting',     4,  [+24, +96]],   // ожидание — дедлайн через 1-4 дня
            ['resolved',    5,  [-72, -1]],    // решены — дедлайн в прошлом
            ['closed',      4,  [-168, -24]],  // закрыты — дедлайн в прошлом
            ['cancelled',   2,  [-240, -48]],  // отменены
        ];

        $counter = 1;

        foreach ($buckets as [$slug, $count, [$dlMin, $dlMax]]) {
            $status = $statuses[$slug] ?? $statuses->first();

            for ($i = 0; $i < $count; $i++) {
                $type      = $types->random();
                $priority  = $priorities->random();
                $client    = $clients->random();
                $assignee  = $techs->random();

                $deadlineAt = now()->addHours(rand($dlMin, $dlMax));

                // created_at: задолго до дедлайна, но реалистично
                $createdAt = (clone $deadlineAt)->subHours($type->sla_hours + rand(0, 12));

                // Не даём created_at быть в будущем
                if ($createdAt->isFuture()) {
                    $createdAt = now()->subMinutes(rand(10, 120));
                }

                $startedAt    = null;
                $completedAt  = null;
                $resolutionNotes = null;
                $clientRating    = null;
                $clientComment   = null;

                if (in_array($slug, ['in_progress', 'resolved', 'closed'])) {
                    $startedAt = (clone $createdAt)->addHours(rand(1, 4));
                }

                if (in_array($slug, ['resolved', 'closed'])) {
                    $completedAt     = (clone $deadlineAt)->subHours(rand(0, 6));
                    $resolutionNotes = fake()->sentence(12);
                }

                if ($slug === 'closed') {
                    $clientRating  = rand(3, 5);
                    $clientComment = fake()->sentence();
                }

                $request = ServiceRequest::query()->create([
                    'ticket_number'    => sprintf('SRV-%04d', $counter),
                    'title'            => fake()->randomElement([
                        'Не включается рабочая станция',
                        'Проблема с печатью документов',
                        'Нет доступа к корпоративной сети',
                        'Требуется установка ПО',
                        'Сильный шум вентилятора',
                        'Зависает операционная система',
                        'Не работает монитор',
                        'Проблема с принтером',
                    ]),
                    'description'      => fake()->paragraph(3),
                    'type_id'          => $type->id,
                    'priority_id'      => $priority->id,
                    'status_id'        => $status->id,
                    'client_id'        => $client->id,
                    'assigned_to'      => $assignee->id,
                    'equipment_id'     => rand(0, 100) > 20 ? $equipment->random()?->id : null,
                    'location'         => fake()->randomElement(['Офис 101', 'Офис 204', 'Склад', 'Переговорная 2']),
                    'planned_at'       => rand(0, 100) > 50 ? (clone $createdAt)->addHours(rand(2, 24)) : null,
                    'deadline_at'      => $deadlineAt,
                    'started_at'       => $startedAt,
                    'completed_at'     => $completedAt,
                    'resolution_notes' => $resolutionNotes,
                    'client_rating'    => $clientRating,
                    'client_comment'   => $clientComment,
                    'created_at'       => $createdAt,
                    'updated_at'       => now(),
                ]);

                for ($c = 1; $c <= rand(1, 3); $c++) {
                    $author = rand(0, 1) ? $client : $assignee;
                    RequestComment::query()->create([
                        'request_id' => $request->id,
                        'user_id'    => $author->id,
                        'body'       => fake()->sentence(rand(10, 20)),
                        'is_internal' => $author->role !== 'client' && rand(0, 100) > 60,
                        'created_at' => (clone $createdAt)->addHours($c),
                        'updated_at' => (clone $createdAt)->addHours($c),
                    ]);
                }

                ActivityLog::query()->create([
                    'user_id'     => $assignee->id,
                    'model_type'  => ServiceRequest::class,
                    'model_id'    => $request->id,
                    'action'      => 'created',
                    'description' => "Создана заявка {$request->ticket_number}",
                    'ip_address'  => '127.0.0.1',
                    'created_at'  => $createdAt,
                ]);

                $counter++;
            }
        }
    }
}