<?php

namespace App\Services;

use App\Models\StudentContract;
use App\Models\StudentMedia;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Support\Facades\Storage;

class StudentContractService
{
    public function getFranchisorSummary(): array
    {
        return [
            'frozen'    => StudentContract::where('status', 'frozen')->count(),
            'cancelled' => StudentContract::where('status', 'cancelled')->count(),
        ];
    }

    public function getFranchisorByStatus(string $status): Collection
    {
        return StudentContract::with(['student', 'unit'])
            ->where('status', $status)
            ->orderBy('created_at', 'desc')
            ->get();
    }

    public function getAll(int $unitId, ?int $studentId = null): Collection
    {
        return StudentContract::with(['student.city', 'student.state', 'classPackageUnit'])
            ->where('unit_id', $unitId)
            ->when($studentId, fn ($q) => $q->where('student_id', $studentId))
            ->orderBy('created_at', 'desc')
            ->get();
    }

    public function findById(int $id): ?StudentContract
    {
        return StudentContract::with(['student', 'classPackageUnit'])->find($id);
    }

    public function create(array $data): StudentContract
    {
        if (!empty($data['due_day'])) {
            $data['recurring_day'] = (int) $data['due_day'];
        }
        unset($data['due_day']);

        return StudentContract::create($data);
    }

    public function update(int $id, array $data): ?StudentContract
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        if (!empty($data['due_day'])) {
            $data['recurring_day'] = (int) $data['due_day'];
        }
        unset($data['due_day']);

        $model->update($data);
        return $model->fresh();
    }

    public function attachFile(int $id, $file): ?StudentContract
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        /** @var \Illuminate\Http\UploadedFile $file */
        $path = $file->store('student-media');

        StudentMedia::create([
            'student_id'          => $model->student_id,
            'student_contract_id' => $model->id,
            'url'                 => $path,
            'file_type'           => $file->getMimeType(),
            'type'                => 'contract',
        ]);

        $model->update(['file_url' => Storage::url($path), 'file_type' => $file->getMimeType()]);

        return $model->fresh();
    }

    public function freeze(int $id): ?StudentContract
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        $model->update(['status' => 'frozen']);
        return $model->fresh();
    }

    public function cancel(int $id): ?StudentContract
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        $model->update(['status' => 'cancelled']);
        return $model->fresh();
    }

    public function reactivate(int $id): ?StudentContract
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        $model->update(['status' => 'active']);
        return $model->fresh();
    }

    public function delete(int $id): bool
    {
        $model = $this->findById($id);

        if (!$model) {
            return false;
        }

        if ($model->file_url) {
            Storage::delete($model->file_url);
        }

        return $model->delete();
    }
}