<?php

namespace Dcat\Admin\Grid;

use Dcat\Admin\Admin;
use Dcat\Admin\Grid\Filter\AbstractFilter;
use Dcat\Admin\Grid\Filter\Between;
use Dcat\Admin\Grid\Filter\Date;
use Dcat\Admin\Grid\Filter\Day;
use Dcat\Admin\Grid\Filter\EndWith;
use Dcat\Admin\Grid\Filter\Equal;
use Dcat\Admin\Grid\Filter\Group;
use Dcat\Admin\Grid\Filter\Gt;
use Dcat\Admin\Grid\Filter\Hidden;
use Dcat\Admin\Grid\Filter\Ilike;
use Dcat\Admin\Grid\Filter\In;
use Dcat\Admin\Grid\Filter\Layout\Layout;
use Dcat\Admin\Grid\Filter\Like;
use Dcat\Admin\Grid\Filter\Lt;
use Dcat\Admin\Grid\Filter\Month;
use Dcat\Admin\Grid\Filter\Newline;
use Dcat\Admin\Grid\Filter\Ngt;
use Dcat\Admin\Grid\Filter\Nlt;
use Dcat\Admin\Grid\Filter\NotEqual;
use Dcat\Admin\Grid\Filter\NotIn;
use Dcat\Admin\Grid\Filter\Scope;
use Dcat\Admin\Grid\Filter\StartWith;
use Dcat\Admin\Grid\Filter\Where;
use Dcat\Admin\Grid\Filter\Year;
use Dcat\Admin\Traits\BuilderEvents;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Contracts\Support\Renderable;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Input;

/**
 * Class Filter.
 *
 * @method Equal     equal($column, $label = '')
 * @method NotEqual  notEqual($column, $label = '')
 * @method Like      like($column, $label = '')
 * @method Ilike     ilike($column, $label = '')
 * @method StartWith startWith($column, $label = '')
 * @method EndWith   endWith($column, $label = '')
 * @method Gt        gt($column, $label = '')
 * @method Lt        lt($column, $label = '')
 * @method Ngt       ngt($column, $label = '')
 * @method Nlt       nlt($column, $label = '')
 * @method Between   between($column, $label = '')
 * @method In        in($column, $label = '')
 * @method NotIn     notIn($column, $label = '')
 * @method Where     where($colum, $callback, $label = '')
 * @method Date      date($column, $label = '')
 * @method Day       day($column, $label = '')
 * @method Month     month($column, $label = '')
 * @method Year      year($column, $label = '')
 * @method Hidden    hidden($name, $value)
 * @method Group     group($column, $builder = null, $label = '')
 * @method Newline   newline()
 */
class Filter implements Renderable
{
    use BuilderEvents;

    /**
     * Ignore value.
     *
     * @var string
     */
    const IGNORE_VALUE = '___';

    /**
     * @var array
     */
    protected static $supports = [];

    /**
     * @var array
     */
    protected static $defaultFilters = [
        'equal'     => Equal::class,
        'notEqual'  => NotEqual::class,
        'ilike'     => Ilike::class,
        'like'      => Like::class,
        'startWith' => StartWith::class,
        'endWith'   => EndWith::class,
        'gt'        => Gt::class,
        'lt'        => Lt::class,
        'ngt'       => Ngt::class,
        'nlt'       => Nlt::class,
        'between'   => Between::class,
        'group'     => Group::class,
        'where'     => Where::class,
        'in'        => In::class,
        'notIn'     => NotIn::class,
        'date'      => Date::class,
        'day'       => Day::class,
        'month'     => Month::class,
        'year'      => Year::class,
        'hidden'    => Hidden::class,
        'newline'   => Newline::class,
    ];

    /**
     * @var Model
     */
    protected $model;

    /**
     * @var array
     */
    protected $filters = [];

    /**
     * Action of search form.
     *
     * @var string
     */
    protected $action;

    /**
     * @var string
     */
    protected $view = 'admin::filter.container';

    /**
     * @var string
     */
    protected $filterID = 'filter-box';

    /**
     * @var string
     */
    protected $name = '';

    /**
     * @var bool
     */
    public $expand = false;

    /**
     * @var Collection
     */
    protected $scopes;

    /**
     * @var Layout
     */
    protected $layout;

    /**
     * Primary key of giving model.
     *
     * @var mixed
     */
    protected $primaryKey;

    /**
     * @var string
     */
    protected $style = 'padding:18px 15px 8px';

    /**
     * @var bool
     */
    protected $disableResetButton = false;

    /**
     * @var string
     */
    protected $border = 'border-top:1px solid #f4f4f4;';

    /**
     * @var string
     */
    protected $containerClass = '';

    /**
     * @var bool
     */
    protected $disableCollapse = false;

    /**
     * @var array
     */
    protected $inputs;

    /**
     * Create a new filter instance.
     *
     * @param Model $model
     */
    public function __construct(Model $model)
    {
        $this->model = $model;

        $this->primaryKey = $model->getKeyName();

        $this->filterID = $this->generateFilterId();

        $this->initLayout();

        $this->scopes = new Collection();

        $this->callResolving();
    }

    /**
     * Initialize filter layout.
     */
    protected function initLayout()
    {
        $this->layout = new Filter\Layout\Layout($this);
    }

    /**
     * @return string
     */
    protected function generateFilterId()
    {
        return 'filter-box-'.Str::random(8);
    }

    /**
     * Set action of search form.
     *
     * @param string $action
     *
     * @return $this
     */
    public function setAction($action)
    {
        $this->action = $action;

        return $this;
    }

    /**
     * @return $this
     */
    public function withoutInputBorder()
    {
        $this->containerClass = 'input-no-border';

        return $this;
    }

    /**
     * @param bool $disabled
     * @return $this
     */
    public function disableCollapse(bool $disabled = true)
    {
        $this->disableCollapse = $disabled;

        return $this;
    }

    /**
     * @param bool $disabled
     * @return $this
     */
    public function disableResetButton(bool $disabled = true)
    {
        $this->disableResetButton = $disabled;

        return $this;
    }

    /**
     * Get input data.
     *
     * @param string $key
     * @param null   $value
     *
     * @return array|mixed
     */
    public function input($key = null, $default = null)
    {
        $inputs = $this->getInputs();

        if ($key === null) {
            return $inputs;
        }

        return Arr::get($inputs, $key, $default);
    }


    /**
     * Get grid model.
     *
     * @return Model
     */
    public function getModel()
    {
        return $this->model;
    }

    /**
     * Get grid.
     *
     * @return \Dcat\Admin\Grid
     */
    public function getGrid()
    {
        return $this->model->getGrid();
    }

    /**
     * Set ID of search form.
     *
     * @param string $filterID
     *
     * @return $this
     */
    public function setFilterID($filterID)
    {
        $this->filterID = $filterID;

        return $this;
    }

    /**
     * Get filter ID.
     *
     * @return string
     */
    public function getFilterID()
    {
        return $this->filterID;
    }

    /**
     * @param $name
     *
     * @return $this
     */
    public function setName($name)
    {
        $this->name = $name;

        $this->setFilterID("{$this->name}-{$this->filterID}");

        return $this;
    }

    /**
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

    public function withoutBorder()
    {
        return $this->withBorder('');
    }

    public function withBorder($border = null)
    {
        $this->border = is_null($border) ? 'border-top:1px solid #f4f4f4;' : $border;

        return $this;
    }

    /**
     * Remove filter by column.
     *
     * @param string|array $column
     */
    public function removeFilter($column)
    {
        $this->filters = array_filter($this->filters, function (AbstractFilter $filter) use (&$column) {
            if (is_array($column)) {
                return ! in_array($filter->getColumn(), $column);
            }

            return $filter->getColumn() != $column;
        });
    }

    /**
     * @return array
     */
    public function getInputs()
    {
        if (!is_null($this->inputs)) {
            return $this->inputs;
        }

        $this->inputs = Arr::dot(Input::all());

        $this->inputs = array_filter($this->inputs, function ($input) {
            return $input !== '' && !is_null($input) && $input !== static::IGNORE_VALUE;
        });

        $this->sanitizeInputs($this->inputs);

        return $this->inputs;
    }

    /**
     * Get all conditions of the filters.
     *
     * @return array
     */
    public function conditions()
    {
        $inputs = $this->getInputs();

        if (empty($inputs)) {
            return [];
        }

        $params = [];

        foreach ($inputs as $key => $value) {
            Arr::set($params, $key, $value);
        }

        $conditions = [];

        foreach ($this->filters() as $filter) {
            $conditions[] = $filter->condition($params);
        }

        return tap(array_filter($conditions), function ($conditions) {
            if (!empty($conditions)) {
                $this->expand();
            }
        });
    }

    /**
     * @param $inputs
     *
     * @return array
     */
    protected function sanitizeInputs(&$inputs)
    {
        if (!$this->name) {
            return $inputs;
        }

        $inputs = collect($inputs)->filter(function ($input, $key) {
            return Str::startsWith($key, "{$this->name}_");
        })->mapWithKeys(function ($val, $key) {
            $key = str_replace("{$this->name}_", '', $key);

            return [$key => $val];
        })->toArray();
    }

    /**
     * Add a filter to grid.
     *
     * @param AbstractFilter $filter
     *
     * @return AbstractFilter
     */
    protected function addFilter(AbstractFilter $filter)
    {
        $this->layout->addFilter($filter);

        $filter->setParent($this);

        return $this->filters[] = $filter;
    }

    /**
     * Use a custom filter.
     *
     * @param AbstractFilter $filter
     *
     * @return AbstractFilter
     */
    public function use(AbstractFilter $filter)
    {
        return $this->addFilter($filter);
    }

    /**
     * Get all filters.
     *
     * @return AbstractFilter[]
     */
    public function filters()
    {
        return $this->filters;
    }

    /**
     * @param string $key
     * @param string $label
     *
     * @return Scope
     */
    public function scope($key, $label = '')
    {
        $scope = new Scope($key, $label);

        $this->scopes->push($scope);

        return $scope;
    }

    /**
     * Get all filter scopes.
     *
     * @return Collection
     */
    public function getScopes()
    {
        return $this->scopes;
    }

    /**
     * Get current scope.
     *
     * @return Scope|null
     */
    public function getCurrentScope()
    {
        $key = request(Scope::QUERY_NAME);

        return $this->scopes->first(function ($scope) use ($key) {
            return $scope->key == $key;
        });
    }

    /**
     * Get the name of current scope.
     *
     * @return string
     */
    public function getCurrentScopeName()
    {
        return request(Scope::QUERY_NAME);
    }

    /**
     * Get scope conditions.
     *
     * @return array
     */
    protected function scopeConditions()
    {
        if ($scope = $this->getCurrentScope()) {
            return $scope->condition();
        }

        return [];
    }

    /**
     * Expand filter container.
     *
     * @return $this
     */
    public function expand()
    {
        $this->expand = true;

        return $this;
    }

    /**
     * Execute the filter with conditions.
     *
     * @param bool $toArray
     *
     * @return array|Collection|mixed
     */
    public function execute($toArray = true)
    {
        $conditions = array_merge(
            $this->conditions(),
            $this->scopeConditions()
        );

        return $this->model->addConditions($conditions)->buildData($toArray);
    }

    /**
     * @param string $top
     * @param string $right
     * @param string $bottom
     * @param string $left
     * @return Filter
     */
    public function padding($top = '15px', $right = '15px', $bottom = '5px', $left = '')
    {
        return $this->style("padding:$top $right $bottom $left");
    }

    /**
     *
     * @param string $style
     * @return $this
     */
    public function style(?string $style)
    {
        $this->style = $style;

        return $this;
    }

    public function resetPosition()
    {
        return $this->style('padding:0;left:-4px;');
    }

    public function hiddenResetButtonText()
    {
        Admin::style(".{$this->containerClass} a.reset .hidden-xs{display:none}");

        return $this;
    }

    /**
     * Get the string contents of the filter view.
     *
     * @return \Illuminate\View\View|string
     */
    public function render()
    {
        if (empty($this->filters)) {
            return '';
        }

        $this->callComposing();

        return view($this->view)->with([
            'action'   => $this->action ?: $this->urlWithoutFilters(),
            'layout'   => $this->layout,
            'filterID' => $this->disableCollapse ? '' : $this->filterID,
            'expand'   => $this->expand,
            'style'    => $this->style,
            'border'   => $this->border,

            'containerClass'     => $this->containerClass,
            'disableResetButton' => $this->disableResetButton,
        ])->render();
    }

    /**
     * Get url without filter queryString.
     *
     * @return string
     */
    public function urlWithoutFilters()
    {
        /** @var Collection $columns */
        $columns = collect($this->filters)->map->getColumn()->flatten();

        $pageKey = 'page';

        if ($gridName = $this->model->getGrid()->getName()) {
            $pageKey = "{$gridName}_{$pageKey}";
        }

        $columns->push($pageKey);

        $groupNames = collect($this->filters)->filter(function ($filter) {
            return $filter instanceof Group;
        })->map(function (AbstractFilter $filter) {
            return "{$filter->getId()}_group";
        });

        return $this->fullUrlWithoutQuery(
            $columns->merge($groupNames)
        );
    }

    /**
     * Get url without scope queryString.
     *
     * @return string
     */
    public function urlWithoutScopes()
    {
        return $this->fullUrlWithoutQuery(Scope::QUERY_NAME);
    }

    /**
     * Get full url without query strings.
     *
     * @param Arrayable|array|string $keys
     *
     * @return string
     */
    protected function fullUrlWithoutQuery($keys)
    {
        if ($keys instanceof Arrayable) {
            $keys = $keys->toArray();
        }

        $keys = (array) $keys;

        $request = request();

        $query = $request->query();
        Arr::forget($query, $keys);

        $question = $request->getBaseUrl().$request->getPathInfo() == '/' ? '/?' : '?';

        return count($request->query()) > 0
            ? $request->url().$question.http_build_query($query)
            : $request->fullUrl();
    }

    /**
     * Generate a filter object and add to grid.
     *
     * @param string $method
     * @param array  $arguments
     *
     * @return AbstractFilter|$this
     */
    public function __call($method, $arguments)
    {
        if (!empty(static::$supports[$method])) {
            $class = static::$supports[$method];
            if (!is_subclass_of($class, AbstractFilter::class)) {
                throw new \InvalidArgumentException("The class [{$class}] must be a type of ".AbstractFilter::class.'.');
            }

            return $this->addFilter(new $class(...$arguments));
        }

        if (isset(static::$defaultFilters[$method])) {
            return $this->addFilter(new static::$defaultFilters[$method](...$arguments));
        }

        return $this;
    }

    /**
     * @param string $name
     * @param string $filterClass
     */
    public static function extend($name, $filterClass)
    {
        static::$supports[$name] = $filterClass;
    }

    /**
     * @return array
     */
    public static function getExtensions()
    {
        return static::$supports;
    }

}