<?php

namespace App\Http\Livewire;

use Livewire\Component;
use Livewire\WithPagination;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;

class Datatable extends Component
{
	use WithPagination, Traits\WithSort, Traits\Alert;

	/**
	 * Query string settings.
	 */
	protected $queryString = [
		'sort' => ['except' => 'id'],
		'dir' => ['except' => 'asc'],
		'page' => ['except' => 1],
		'trashed' => ['except' => false]
	];

	/**
	 * Model to get data from.
	 */
	public $model;

	/**
	 * Array of columns to show
	 */
	public array $columns;

	/**
	 * What colums are sortable
	 */
	public array $sort_columns;

	/**
	 * Default sorting column
	 */
	public string $default_sort;

	/**
	 * If only trashed records should be shown.
	 */
	public bool $trashed = false;

	public $route_create;

	/**
	 * Route for editing a record (if null, link is omitted)
	 */
	public $route_edit;

	/**
	 * True if delete functionality is enabled.
	 */
	public $delete_enabled;

	/**
	 * True if restore functionality is enabled.
	 */
	public $restore_enabled;

	/**
	 * How many records should be displayed on one page.
	 */
	public int $itemsPerPage = 30;

    public function mount(string $model, array $columns,
		array $sort_columns = [], $default_sort = '',
		$route_create = null, $route_edit = null, $delete_enabled = false, $restore_enabled = false)
    {
		$this->model = app()->make($model);
		$this->default_sort = $default_sort;
		$this->sort = $this->default_sort;
		$this->sort_columns = $sort_columns;
		$this->route_create = $route_create;
		$this->route_edit = $route_edit;
		$this->delete_enabled = (bool) $delete_enabled;
		$this->restore_enabled = (bool) $restore_enabled;

		$this->setTrashed(false);
    }

	/**
	 * Get the model name.
	 */
	public function getModelName() : string
	{
		return class_basename($this->model);
	}

	/**
	 * Delete an record
	 */
	public function delete($id)
	{
		if (!$this->delete_enabled) {
			return;
		}

		$record = $this->model->find($id);

		if (!$record) {
			$this->danger('Record not found');
			return;
		}

		$record->delete();

		$this->info(__($this->getModelName() . " #:id was deleted.", [ 'id' => $record->id ]));
	}

	/**
	 * Restore a delted record
	 */
	public function restore($id)
	{
		if (!$this->restore_enabled) {
			return;
		}

		$record = $this->model->withTrashed()->find($id);

		if (!$record) {
			$this->danger('Record not found');
			return;
		}

		$record->restore();

		$this->info(__($this->getModelName() . " #:id was restored.", [ 'id' => $record->id ]));
	}

    /**
     * Render the datatable
     */
    public function render()
    {
		$query = $this->model->query();

		// Only include trashed if asked to.
		if ($this->trashed) {
			$query->onlyTrashed();
		}

		// Check colums for "dot-notated" strings.
		// as we want to eager load those relationships
		foreach ($this->columns as $col => $_) {
			$p = strrpos($col, '.');
			if ($p !== false) {
				$rel = substr($col, 0, $p);
				$query->with($rel);
			}
		}

		// Apply sorting.
		$this->sortApply($query);

		$items = $query->paginate($this->itemsPerPage);

        return view('livewire.datatable', ['items' => $items]);
    }

	/**
	 * Toggle trashed flag
	 */
	public function toggleTrashed()
	{
		$this->setTrashed(!$this->trashed);
	}

	/**
	 * Set trashed flag.
	 */
	public function setTrashed($value)
	{
		$this->trashed = (bool) $value;

		if ($this->trashed) {
			// Add deleted_at columns.
			$this->columns['deleted_at'] = 'Deleted at';
			$this->sort_columns['deleted_at'] = 'deleted_at';
		} else {
			// Unset deleted_at columns.
			unset($this->columns['deleted_at']);
			unset($this->sort_columns['deleted_at']);

			// if delete_at was the sorting column
			// revert back to default sorting.
			if ($this->sort == 'deleted_at') {
				$this->sort = $this->default_sort;
			}
		}
	}
}