<?php

namespace App\Services\Project;

use App\Http\Resources\API\KanbanTaskResource;
use App\Http\Resources\API\UserProfileResource;
use App\Models\Enums\ProjectStatus;
use App\Models\Project;
use App\Models\Requirement;
use App\Models\User;

class ProjectKanbanService
{
    public function kanban(Project $project, $group = "requirement_asc")
    {
        $groupKey = match ($group) {
            "assign" => "assign",
            "finished_by" => "finished_by",
            default => "requirement_id"
        };

        $groupTasks = $project->tasks()->with(['assignTo'])->get()->groupBy($groupKey);

        $statusItems = array_column(ProjectStatus::cases(), 'value');

        $items = [];
        $groupIds = [];
        foreach ($groupTasks as $groupId => $tasks) {
            $groupItems = [];

            foreach ($statusItems as $status) {
                $groupItems[$status] = [];
            }

            foreach ($tasks as $task) {
                $groupItems[$task->status][] = new KanbanTaskResource($task);
            }

            $items[$groupId ?: "empty"] = $groupItems;
            $groupIds[] = $groupId;
        }

        return [
            'group_data' => $this->getKanbanGroupData($groupIds, $group),
            'group' => $group,
            'tasks' => $items,
            'status_items' => $statusItems,
        ];
    }

    protected function getKanbanGroupData(array $ids, string $group)
    {
        $orderBy = match ($group) {
            "requirement_asc" => ['id', 'asc'],
            "requirement_desc" => ['id', 'desc'],
            "requirement_priority_asc" => ['priority', 'asc'],
            "requirement_priority_desc" => ['priority', 'desc'],
            default => null
        };

        return match ($group) {
            "assign", "finished_by" => UserProfileResource::collection(User::query()->whereIn("id", $ids)->get()),
            default => Requirement::query()->whereIn("id", $ids)
                ->when($orderBy, fn($query) => $query->orderBy(...$orderBy))
                ->get([
                    'id', 'title', 'priority', 'status'
                ]),
        };
    }
}