<?php

namespace App\Http\Resources;

use App\Models\City;
use App\Models\Language;
use App\Services\CurrencyFormatterService;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\ResourceCollection;
use Illuminate\Pagination\AbstractPaginator;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Storage;
use JsonSerializable;
use Throwable;

class ItemCollection extends ResourceCollection
{
    /**
     * Transform the resource into an array.
     *
     * @return array|Arrayable|JsonSerializable
     *
     * @throws Throwable
     */
    public function toArray(Request $request)
    {

        try {
            $formatter = app(CurrencyFormatterService::class);
            $response = [];

            // Get current language once
            $contentLangCode = $request->header('Content-Language') ?? app()->getLocale();
            $currentLanguage = Language::where('code', $contentLangCode)->first();
            $currentLangId = $currentLanguage->id ?? 1;
            $defaultLangId = 1;

            foreach ($this->collection as $key => $collection) {

                // Base response
                $response[$key] = $collection->toArray();

                // return response()->json($collection);

                // Currency & price formatting
                // $response[$key]['currency_symbol'] = $collection->currency_symbol;
                // $response[$key]['currency_position'] = $collection->currency_position;
                // $response[$key]['formatted_price'] = $collection->formatted_price;

                // $response[$key]['formatted_min_salary'] = $collection->formatted_min_salary;
                // $response[$key]['formatted_max_salary'] = $collection->formatted_max_salary;
                // $response[$key]['formatted_salary_range'] = $collection->formatted_salary_range ?? null;

                // $response[$key]['price'] = $collection->price;

                // return response()->json($collection->currencyRelation->currency_symbol);

                $response[$key]['formatted_price'] = $formatter->formatPrice(
                    $collection?->price,
                    $collection?->currency
                );

                $response[$key]['formatted_salary_range'] = $formatter->formatSalaryRange(
                    $collection?->min_salary,
                    $collection?->max_salary,
                    $collection?->currency
                );

                // Feature status
                $response[$key]['is_feature'] = $collection->status == 'approved' && $collection->relationLoaded('featured_items')
                    ? $collection->featured_items->isNotEmpty()
                    : false;

                // Favourites
                if ($collection->relationLoaded('favourites')) {
                    $response[$key]['total_likes'] = $collection->favourites->count();
                    $response[$key]['is_liked'] = Auth::check()
                        ? $collection->favourites->where('item_id', $collection->id)->where('user_id', Auth::id())->count() > 0
                        : false;
                }

                // User info
                if ($collection->relationLoaded('user') && ! is_null($collection->user)) {
                    $response[$key]['user'] = $collection->user;
                    $response[$key]['user']['reviews_count'] = $collection->user->sellerReview()->count();
                    $response[$key]['user']['average_rating'] = $collection->user->sellerReview->avg('ratings');
                    if ($collection->user->show_personal_details == 0) {
                        $response[$key]['user']['mobile'] = '';
                        $response[$key]['user']['country_code'] = '';
                        $response[$key]['user']['email'] = '';
                    }
                }

                // Load city once
                $city = City::with(['translations', 'state', 'country'])
                    ->where('name', $collection->city)
                    ->whereHas('state', fn($q) => $q->where('name', $collection->state))
                    ->first();

                // Translated item
                $translatedItem = [
                    'name' => $collection->name,
                    'description' => $collection->description,
                    'address' => $collection->address,
                    'rejected_reason' => $collection->rejected_reason ?? null,
                    'admin_edit_reason' => $collection->admin_edit_reason ?? null,
                    'city' => $city->translated_name ?? $collection->city,
                    'state' => $city->state->translated_name ?? $collection->state,
                    'country' => $city->country->translated_name ?? $collection->country,
                ];

                if ($currentLanguage && $collection->relationLoaded('translations')) {
                    $translation = $collection->translations->firstWhere('language_id', $currentLangId);
                    if ($translation) {
                        $translatedItem = [
                            'name' => $translation->name,
                            'description' => $translation->description,
                            'address' => $translation->address,
                            'rejected_reason' => $translation->rejected_reason,
                            'admin_edit_reason' => $translation->admin_edit_reason,
                            'city' => $city->translated_name ?? $collection->city,
                            'state' => $city->state->translated_name ?? $collection->state,
                            'country' => $city->country->translated_name ?? $collection->country,
                        ];
                    }
                }

                $response[$key]['translated_item'] = $translatedItem;
                $response[$key]['translated_area'] = $collection->area->translated_name ?? '';
                $response[$key]['translated_city'] = $city?->translated_name ?? $collection->city;
                $response[$key]['translated_state'] = $city->state->translated_name ?? $collection->state;
                $response[$key]['translated_country'] = $city->country->translated_name ?? $collection->country;
                $response[$key]['translated_address'] =
                    (! empty($response[$key]['translated_area']) ? $response[$key]['translated_area'] . ', ' : '') .
                    $response[$key]['translated_city'] . ', ' .
                    $response[$key]['translated_state'] . ', ' .
                    $response[$key]['translated_country'];

                // Custom fields
                if ($collection->relationLoaded('item_custom_field_values')) {
                    $response[$key]['custom_fields'] = [];
                    $response[$key]['translated_custom_fields'] = [];
                    $response[$key]['all_translated_custom_fields'] = [];

                    $grouped = $collection->item_custom_field_values->groupBy('custom_field_id');

                    foreach ($grouped as $customFieldId => $fieldValues) {
                        $default = $fieldValues->firstWhere('language_id', $defaultLangId);
                        $translated = $currentLanguage ? $fieldValues->firstWhere('language_id', $currentLangId) : null;

                        // Default fields
                        if ($default && $default->relationLoaded('custom_field') && ! empty($default->custom_field)) {
                            $field = $default->custom_field;
                            $tempRow = $field->toArray();
                            $tempRow['value'] = $field->type === 'fileinput'
                                ? (! empty($default->value) ? [url(Storage::url($default->value))] : [])
                                : (is_array($default->value) ? $default->value : json_decode($default->value, true));
                            $tempRow['custom_field_value'] = $default->toArray();
                            unset($tempRow['custom_field_value']['custom_field']);
                            $tempRow['translated_selected_values'] = $this->resolveTranslatedSelectedValues($field, $default);
                            $response[$key]['custom_fields'][] = $tempRow;
                        }

                        // Translated fields
                        $activeField = $translated ?? $default;
                        if ($activeField && $activeField->relationLoaded('custom_field') && ! empty($activeField->custom_field)) {
                            $field = $activeField->custom_field;
                            $tempRow = $field->toArray();
                            $tempRow['value'] = $field->type === 'fileinput'
                                ? (! empty($activeField->value) ? url(Storage::url($activeField->value)) : '')
                                : (is_array($activeField->value) ? $activeField->value : json_decode($activeField->value, true));
                            $tempRow['custom_field_value'] = $activeField->toArray();
                            unset($tempRow['custom_field_value']['custom_field']);
                            $tempRow['language_id'] = $activeField->language_id;
                            $tempRow['translated_selected_values'] = $this->resolveTranslatedSelectedValues($field, $activeField);
                            $response[$key]['translated_custom_fields'][] = $tempRow;
                        }

                        // All translated custom fields
                        foreach ($fieldValues as $fieldValue) {
                            if ($fieldValue->relationLoaded('custom_field') && ! empty($fieldValue->custom_field)) {
                                $field = $fieldValue->custom_field;
                                $tempRow = $field->toArray();
                                // $tempRow['value'] = $field->type === "fileinput"
                                //     ? (!empty($fieldValue->value) ? url(Storage::url($fieldValue->value)) : '')
                                //     : (is_array($fieldValue->value) ? $fieldValue->value : json_decode($fieldValue->value, true));

                                if ($field->type === 'fileinput') {
                                    if (! empty($fieldValue->value)) {
                                        // ✅ Only decode if it looks like JSON
                                        $rawValue = is_string($fieldValue->value) && (str_starts_with($fieldValue->value, '[') || str_starts_with($fieldValue->value, '{'))
                                            ? json_decode($fieldValue->value, true)
                                            : $fieldValue->value;

                                        // ✅ Handle both single and multiple files
                                        if (is_array($rawValue)) {
                                            $value = array_map(fn($file) => url(Storage::url($file)), $fieldValue->value);
                                        } else {
                                            $value = url(Storage::url($fieldValue->value));
                                        }
                                    } else {
                                        $value = '';
                                    }
                                } else {
                                    $value = is_array($fieldValue->value)
                                        ? $fieldValue->value
                                        : json_decode($fieldValue->value, true);
                                }

                                $tempRow['value'] = $value;

                                $tempRow['custom_field_value'] = $tempRow;
                                unset($tempRow['custom_field_value']['custom_field']);
                                $tempRow['language_id'] = $fieldValue->language_id;
                                $tempRow['translated_selected_values'] = $this->resolveTranslatedSelectedValues($field, $fieldValue);
                                $response[$key]['all_translated_custom_fields'][] = $tempRow;
                            }
                        }
                    }

                    unset($response[$key]['item_custom_field_values']);
                }

                // Item Offers, Reports, Purchases, Job Applications
                $response[$key]['is_already_offered'] = $collection->relationLoaded('item_offers') && Auth::check()
                    ? $collection->item_offers->where('item_id', $collection->id)->where('buyer_id', Auth::id())->count() > 0
                    : false;

                $response[$key]['is_already_reported'] = $collection->relationLoaded('user_reports') && Auth::check()
                    ? $collection->user_reports->where('user_id', Auth::id())->count() > 0
                    : false;

                $response[$key]['is_purchased'] = Auth::check() && $collection->sold_to == Auth::id() ? 1 : 0;

                $response[$key]['is_already_job_applied'] = $collection->relationLoaded('job_applications') && Auth::check()
                    ? $collection->job_applications->where('item_id', $collection->id)->where('user_id', Auth::id())->count() > 0
                    : false;
            }

            // Featured and normal rows
            $featuredRows = [];
            $normalRows = [];
            foreach ($response as $value) {
                $value['is_feature'] ? $featuredRows[] = $value : $normalRows[] = $value;
            }

            $response = array_merge($featuredRows, $normalRows);
            $totalCount = count($response);

            if ($this->resource instanceof AbstractPaginator) {
                return [
                    ...$this->resource->toArray(),
                    'data' => $response,
                    'total_item_count' => $totalCount,
                ];
            }

            return $response;
        } catch (Throwable $th) {
            throw $th;
        }
    }

    public function resolveTranslatedSelectedValues($field, $fieldValue)
    {
        $type = $field->type ?? null;
        $values = $fieldValue->value ?? null;
        $allPossibleValues = $field->values ?? [];
        $selected = [];

        $contentLangCode = request()->header('Content-Language') ?? app()->getLocale();
        $currentLanguage = Language::where('code', $contentLangCode)->first();
        $currentLangId = $currentLanguage->id ?? 1;

        $translatedValues = [];
        if (! empty($field->translations)) {
            $translation = collect($field->translations)->firstWhere('language_id', $currentLangId);
            $translatedValues = $translation['value'] ?? [];
        }

        if (in_array($type, ['checkbox', 'radio', 'dropdown'])) {
            $actualValues = is_array($values) ? $values : json_decode($values, true);
            if (! is_array($actualValues)) {
                $actualValues = [$actualValues];
            }

            foreach ($actualValues as $val) {
                $index = array_search($val, $allPossibleValues);
                $translatedVal = (is_array($translatedValues) && $index !== false && isset($translatedValues[$index]))
                    ? $translatedValues[$index]
                    : $val;

                $selected[] = $translatedVal;
            }
        } elseif (in_array($type, ['textbox', 'number'])) {
            $actualValue = is_array($values) ? ($values[0] ?? '') : $values;
            $selected[] = $actualValue;
        }

        return $selected;
    }
}