<?php

namespace App\Http\Requests\Admin\Manage;

use App\Enums\CuttingStatus;
use App\Models\Cutting;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;
use Illuminate\Validation\Validator;

class CuttingStatusTransitionRequest extends FormRequest
{
    public function authorize(): bool
    {
        $status = CuttingStatus::tryFrom((string) $this->input('status'));

        if ($status === null) {
            return false;
        }

        return $this->user()?->can($status->transitionPermission()->value) ?? false;
    }

    /**
     * @return array<string, mixed>
     */
    public function rules(): array
    {
        return [
            'status' => ['required', Rule::enum(CuttingStatus::class)],
            'reason' => ['nullable', 'string', 'max:500'],
            'verification_note' => ['nullable', 'string', 'max:500'],
            'results' => ['nullable', 'array'],
            'results.*.product_variant_id' => ['required_with:results', 'integer', 'exists:product_variants,id'],
            'results.*.warehouse_stock' => ['required_with:results', 'integer', 'min:0'],
            'results.*.cutting_reject' => ['required_with:results', 'integer', 'min:0'],
        ];
    }

    /**
     * @return array<string, string>
     */
    public function attributes(): array
    {
        return [
            'status' => 'status',
            'reason' => 'alasan penolakan',
            'verification_note' => 'catatan verifikasi',
        ];
    }

    public function withValidator(Validator $validator): void
    {
        $validator->after(function (Validator $validator): void {
            /** @var Cutting $cutting */
            $cutting = $this->route('cutting');
            $status = CuttingStatus::tryFrom((string) $this->input('status'));

            if ($status === null) {
                return;
            }

            if (! $cutting->status->canTransitionTo($status)) {
                $validator->errors()->add('status', 'Status cutting tidak dapat diubah.');
            }

            if ($status === CuttingStatus::REJECTED && trim((string) $this->input('reason')) === '') {
                $validator->errors()->add('reason', 'Alasan penolakan wajib diisi.');
            }

            if ($status === CuttingStatus::VERIFIED && $this->has('results')) {
                $cuttingResults = $cutting->results->keyBy('product_variant_id');
                foreach ($this->input('results', []) as $index => $item) {
                    $variantId = $item['product_variant_id'] ?? 0;
                    $warehouseStock = (int) ($item['warehouse_stock'] ?? 0);
                    $cuttingReject = (int) ($item['cutting_reject'] ?? 0);

                    $originalResult = $cuttingResults->get($variantId);
                    if ($originalResult === null) {
                        $validator->errors()->add("results.{$index}.product_variant_id", 'Varian produk tidak ditemukan pada cutting ini.');

                        continue;
                    }

                    if (($warehouseStock + $cuttingReject) !== (int) $originalResult->cutting_result) {
                        $validator->errors()->add("results.{$index}.warehouse_stock", "Total jumlah (diterima + reject) harus sama dengan hasil cutting asli ({$originalResult->cutting_result} pcs).");
                    }
                }
            }
        });
    }
}