<?php

declare(strict_types=1);

namespace App\Http\Requests\Api\V1;

use App\Enums\ProjectStatus;
use App\Http\Requests\Api\V1\Concerns\GuardsPublication;
use App\Models\Project;
use App\Rules\Translatable;
use App\Rules\UniqueTranslatedSlug;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;
use Illuminate\Validation\Validator;

/**
 * The panel's project form, as rules. On update every field is optional
 * (PATCH semantics) but keeps the same shape.
 *
 * Relations travel as ids and are replaced whole when sent: `technology_ids`,
 * `service_ids`, and `members` with each one's role on the project.
 *
 * `taskstream` opens a public board in TaskStream for the project, keyed
 * `taskstream_key` or one derived from the slug; on an update, only when the
 * project has none yet.
 */
class ProjectRequest extends FormRequest
{
    use GuardsPublication;

    public function authorize(): bool
    {
        return true;
    }

    /**
     * @return array<string, mixed>
     */
    public function rules(): array
    {
        $project = $this->route('project');
        $creating = ! $project instanceof Project;
        $sometimes = $creating ? 'required' : 'sometimes';

        return [
            'title' => [$sometimes, new Translatable(requireDefaultLocale: $creating, max: 255)],
            'slug' => [
                $sometimes,
                new Translatable(requireDefaultLocale: $creating, max: 255),
                new UniqueTranslatedSlug(Project::class, $project?->id),
            ],
            'tagline' => ['sometimes', 'nullable', new Translatable(max: 300)],
            'description' => ['sometimes', 'nullable', new Translatable],
            'decisions' => ['sometimes', 'nullable', new Translatable],
            'postmortem' => ['sometimes', 'nullable', new Translatable],
            'meta_title' => ['sometimes', 'nullable', new Translatable(max: 60)],
            'meta_description' => ['sometimes', 'nullable', new Translatable(max: 160)],

            'status' => ['sometimes', Rule::enum(ProjectStatus::class)],
            'is_featured' => ['sometimes', 'boolean'],
            'needs_help' => ['sometimes', 'boolean'],
            'demo_url' => ['sometimes', 'nullable', 'url', 'max:2048'],
            'cover_image' => ['sometimes', 'nullable', 'string', 'max:2048'],
            'cover_image_alt' => ['sometimes', 'nullable', new Translatable(max: 255)],
            'started_at' => ['sometimes', 'nullable', 'date'],
            'ended_at' => ['sometimes', 'nullable', 'date', 'after_or_equal:started_at'],
            'published_at' => ['sometimes', 'nullable', 'date'],
            'unpublish_at' => ['sometimes', 'nullable', 'date', 'after:published_at'],
            'position' => ['sometimes', 'integer', 'min:0'],

            'client_id' => ['sometimes', 'nullable', 'integer', Rule::exists('clients', 'id')->whereNull('deleted_at')],
            'lead_member_id' => ['sometimes', 'nullable', 'integer', Rule::exists('members', 'id')->whereNull('deleted_at')],

            'technology_ids' => ['sometimes', 'array'],
            'technology_ids.*' => ['integer', 'distinct', Rule::exists('technologies', 'id')],
            'service_ids' => ['sometimes', 'array'],
            'service_ids.*' => ['integer', 'distinct', Rule::exists('services', 'id')->whereNull('deleted_at')],
            'members' => ['sometimes', 'array'],
            'members.*.id' => ['required', 'integer', 'distinct', Rule::exists('members', 'id')->whereNull('deleted_at')],
            'members.*.role' => ['nullable', 'string', 'max:120'],

            // The key is only read along with `taskstream`: a client PATCHing
            // back what it read sends the key it got, which changes nothing.
            'taskstream' => ['sometimes', 'boolean'],
            'taskstream_key' => ['sometimes', 'nullable', 'string', 'regex:/^[A-Za-z][A-Za-z0-9]{1,9}$/'],
        ];
    }

    public function withValidator(Validator $validator): void
    {
        $this->guardPublication($validator, 'projects.publish', ['published_at', 'unpublish_at']);
    }
}