<?php

namespace App\Http\Requests;

use App\Enums\InputType;
use App\Lib\Utils;
use Exception;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\ValidationException;

class UpdateMiniAcfRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return auth()->check();
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    protected function genRules(array $content)
    {
        $rules = [];
        foreach ($content as $i => $block) {
            foreach ($block['content'] as $iptName => $input) {
                $rules = array_merge($rules, $this->getRule(
                    compact('i', 'iptName'),
                    $input['inputType']['value'],
                    $content[$i]['content'][$iptName]
                ));
            }
        }
        return $rules;
    }

    public function attributes()
    {
        return [
            'content' => \trans('Contenu')
        ];
    }

    // PRIVATE FUNCTIONS

    private function getRule(array $coords, $inputType, $content): array
    {
        \extract($coords);
        $inputKey = "content.$i.content.$iptName";
        switch ($inputType) {
            case InputType::string()->value:
                return $this->handleString($inputKey);
            case InputType::text()->value:
                return $this->handleText($inputKey);
            case InputType::image()->value:
                return $this->handleImage($inputKey, $content);
            case InputType::url()->value:
                return $this->handleUrl($inputKey);
            case InputType::boolean()->value:
                return $this->handleBoolean($inputKey);
            case InputType::imageArray()->value:
                return $this->handleImageArray($coords, $inputKey, $content);
            case InputType::dropdownArray()->value:
                return $this->handleDropdownArray($coords, $inputKey);
            case InputType::labelArray()->value:
                return $this->handleLabelArray($coords, $inputKey);
        }
        throw new Exception('Unknown input type');
    }

    private function handleImageArray(array $coords, string $inputKey, array $ipt): array
    {
        \extract($coords);
        $rules = [];
        $ipt = $all['content'][$i]['content'][$iptName];
        $max = isset($ipt['dimensionsMax']);
        $dim = collect(explode(
            ',',
            $ipt['dimensions'] ?? $ipt['dimensionsMax']
        ))->mapWithKeys(function ($v) {
            $v = explode(' ', $v);
            return [$v[0] => $v[1]];
        });
        $rules = array_merge($rules, [
            "$inputKey.value.*" => 'sometimes|array'
        ]);
        if (is_array($this->input("$inputKey.value.*"))) {
            $all = $this->all();
            $images = $this->input("$inputKey.value");
            if (is_array($images)) {
                ksort($images);
                $all['content'][$i]['content'][$iptName]['value'] = $images;
                $this->merge($all);
            }
            foreach ($this->input("$inputKey.value.*") as $imageK => $image) {
                if (!is_string($image)) {
                    $rules = array_merge($rules, [
                        "$inputKey.$imageK" => [
                            'image',
                            'mimes:png,jpg',
                            sprintf(
                                'dimensions:%s=%d,%s=%d',
                                $max ? 'max_height' : 'height',
                                $dim['hauteur'],
                                $max ? 'max_width' : 'width',
                                $dim['largeur']
                            )
                        ]
                    ]);
                } else {
                    $rules = array_merge($rules, [
                        "$inputKey.value.$imageK" => 'string'
                    ]);
                }
            }
        }
        return $rules;
    }

    private function handleLabelArray(array $coords, string $inputKey): array
    {
        \extract($coords);
        $rules = [];
        $all = $this->all();
        foreach ($this->input("$inputKey.value") as $labelIndex => $label) {
            if ($labelIndex === 'X') {
                unset($all['content'][$i]['content'][$iptName]['value'][$labelIndex]);
                continue;
            }
            $rules = array_merge($rules, [
                "$inputKey.value.$labelIndex.*" => 'string'
            ]);
        }
        $this->merge($all);
        return $rules;
    }

    private function handleDropdownArray(array $coords, string $inputKey): array
    {
        \extract($coords);
        $rules = [];
        $all = $this->all();
        foreach ($this->input("$inputKey.value") as $dropdownIndex => $dropdown) {
            if ($dropdownIndex === 'X') {
                unset($all['content'][$i]['content'][$iptName]['value'][$dropdownIndex]);
                continue;
            }
            $rules = array_merge($rules, [
                "$inputKey.value.$dropdownIndex.*" => 'string'
            ]);
        }
        $this->merge($all);
        return $rules;
    }

    private function handleBoolean(string $inputKey): array
    {
        $all = $this->all();
        $nested = Utils::dotStringToNestedArray(
            "$inputKey.value",
            $this->input("$inputKey.value") ? true : false
        );
        $all = array_merge_recursive_distinct($all, $nested);
        $this->merge($all);
        return ["$inputKey.value" => 'boolean'];
    }

    private function handleUrl(string $inputKey): array
    {
        return [
            "$inputKey.value" => [
                'required', 'url',
                // @phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.FoundInExtendedClassBeforeLastUsed
                function ($attribute, $value, $fail) {
                    try {
                        Utils::assertNoInternalUrls($attribute, $value);
                    } catch (ValidationException $e) {
                        $fail(collect($e->errors())->first()[0]);
                    }
                }
            ]
        ];
    }

    private function handleImage(string $inputKey, array $ipt): array
    {
        $max = isset($ipt['dimensionsMax']);
        $dim = collect(explode(
            ',',
            $ipt['dimensions'] ?? $ipt['dimensionsMax'] ?? ''
        ))->mapWithKeys(function ($v) {
            $v = explode(' ', $v);
            return [$v[0] => $v[1]];
        });
        return [
            "$inputKey.value" => [
                'sometimes',
                'image',
                'mimes:png,jpg',
                sprintf(
                    'dimensions:%s=%d,%s=%d',
                    $max ? 'max_height' : 'height',
                    $dim['hauteur'],
                    $max ? 'max_width' : 'width',
                    $dim['largeur']
                )
            ]
        ];
    }

    private function handleText(string $inputKey): array
    {
        return  ["$inputKey.html" => 'required|string|min:15'];
    }

    private function handleString(string $inputKey): array
    {
        return ["$inputKey.value" => 'required|string|min:4'];
    }
}