<?php

namespace App\Modules\Tasks\Models;

use CodeIgniter\Model;
use App\Models\Traits\TenantScopedModel;

class TaskModel extends Model
{
    use TenantScopedModel;

    protected $table            = 'tasks';
    protected $primaryKey       = 'id';
    protected $useSoftDeletes   = false;
    protected $useTimestamps    = true;
    protected $createdField     = 'created_at';
    protected $updatedField     = 'updated_at';
    protected $returnType       = 'array';
    protected $tenantField      = 'organization_id';
    protected $allowedFields    = [
        'organization_id',
        'board_id',
        'column_id',
        'title',
        'description',
        'priority',
        'due_date',
        'completed_at',
        'order_index',
        'created_by',
    ];

    /**
     * Получить задачи с JOIN-ами для таблицы
     */
    public function getForTable(int $organizationId): array
    {
        return $this->select('
            tasks.id,
            tasks.title,
            tasks.description,
            tasks.priority,
            tasks.due_date,
            tasks.completed_at,
            tasks.created_at,
            tc.name as column_name,
            tc.color as column_color,
            u.name as created_by_name
        ')
            ->join('task_columns tc', 'tasks.column_id = tc.id', 'left')
            ->join('users u', 'tasks.created_by = u.id', 'left')
            ->where('tasks.organization_id', $organizationId)
            ->orderBy('tasks.created_at', 'DESC')
            ->findAll();
    }

    /**
     * Получить задачи, сгруппированные по колонкам (для Канбана)
     */
    public function getTasksGroupedByColumn(int $boardId): array
    {
        $tasks = $this->select('tasks.*, tc.name as column_name, tc.color as column_color')
            ->join('task_columns tc', 'tasks.column_id = tc.id', 'left')
            ->where('tasks.board_id', $boardId)
            ->orderBy('tc.order_index', 'ASC')
            ->orderBy('tasks.order_index', 'ASC')
            ->orderBy('tasks.created_at', 'DESC')
            ->findAll();

        $grouped = [];
        foreach ($tasks as $task) {
            $columnId = $task['column_id'] ?? 0;
            if (!isset($grouped[$columnId])) {
                $grouped[$columnId] = [
                    'column_name' => $task['column_name'] ?? 'Без колонки',
                    'column_color' => $task['column_color'] ?? '#6B7280',
                    'tasks' => [],
                ];
            }
            $grouped[$columnId]['tasks'][] = $task;
        }

        return $grouped;
    }

    /**
     * Получить задачи для календаря
     */
    public function getTasksForCalendar(int $organizationId, string $month): array
    {
        return $this->select('tasks.*, tc.color as column_color, tc.name as column_name')
            ->join('task_columns tc', 'tasks.column_id = tc.id', 'left')
            ->where('tasks.organization_id', $organizationId)
            ->where('tasks.due_date >=', date('Y-m-01', strtotime($month)))
            ->where('tasks.due_date <=', date('Y-m-t', strtotime($month)))
            ->where('tasks.completed_at', null)
            ->orderBy('tasks.due_date', 'ASC')
            ->findAll();
    }

    /**
     * Получить задачу по ID
     */
    public function getTask(int $taskId, int $organizationId): ?array
    {
        return $this->select('tasks.*, tc.name as column_name, tc.color as column_color')
            ->join('task_columns tc', 'tasks.column_id = tc.id', 'left')
            ->where('tasks.id', $taskId)
            ->where('tasks.organization_id', $organizationId)
            ->first();
    }

    /**
     * Получить статистику по задачам
     */
    public function getTaskStats(int $organizationId): array
    {
        $total = $this->select('COUNT(*) as count')
            ->where('organization_id', $organizationId)
            ->countAllResults();

        $completed = $this->select('COUNT(*) as count')
            ->where('organization_id', $organizationId)
            ->where('completed_at IS NOT NULL')
            ->countAllResults();

        $overdue = $this->select('COUNT(*) as count')
            ->where('organization_id', $organizationId)
            ->where('completed_at', null)
            ->where('due_date <', date('Y-m-d'))
            ->countAllResults();

        return [
            'total'     => $total,
            'completed' => $completed,
            'overdue'   => $overdue,
            'pending'   => $total - $completed,
        ];
    }
}