<?php

namespace WPML\Collect\Support;

use ArrayAccess;
use WPML\Collect\Support\Traits\Macroable;

class Arr
{
    use Macroable;

    public static function accessible($value)
    {
        return is_array($value) || $value instanceof ArrayAccess;
    }

    public static function add($array, $key, $value)
    {
        if (is_null(static::get($array, $key))) {
            static::set($array, $key, $value);
        }

        return $array;
    }

    public static function collapse($array)
    {
        $results = [];

        foreach ($array as $values) {
            if ($values instanceof Collection) {
                $values = $values->all();
            } elseif (! is_array($values)) {
                continue;
            }

            $results = array_merge($results, $values);
        }

        return $results;
    }

    public static function divide($array)
    {
        return [array_keys($array), array_values($array)];
    }

    public static function dot($array, $prepend = '')
    {
        $results = [];

        foreach ($array as $key => $value) {
            if (is_array($value) && ! empty($value)) {
                $results = array_merge($results, static::dot($value, $prepend.$key.'.'));
            } else {
                $results[$prepend.$key] = $value;
            }
        }

        return $results;
    }

    public static function except($array, $keys)
    {
        static::forget($array, $keys);

        return $array;
    }

    public static function exists($array, $key)
    {
        if ($array instanceof ArrayAccess) {
            return $array->offsetExists($key);
        }

        return array_key_exists($key, $array);
    }

    public static function first($array, callable $callback = null, $default = null)
    {
        if (is_null($callback)) {
            if (empty($array)) {
                return value($default);
            }

            foreach ($array as $item) {
                return $item;
            }
        }

        foreach ($array as $key => $value) {
            if (call_user_func($callback, $value, $key)) {
                return $value;
            }
        }

        return value($default);
    }

    public static function last($array, callable $callback = null, $default = null)
    {
        if (is_null($callback)) {
            return empty($array) ? value($default) : end($array);
        }

        return static::first(array_reverse($array, true), $callback, $default);
    }

    public static function flatten($array, $depth = INF)
    {
        return array_reduce($array, function ($result, $item) use ($depth) {
            $item = $item instanceof Collection ? $item->all() : $item;

            if (! is_array($item)) {
                return array_merge($result, [$item]);
            } elseif ($depth === 1) {
                return array_merge($result, array_values($item));
            } else {
                return array_merge($result, static::flatten($item, $depth - 1));
            }
        }, []);
    }

    public static function forget(&$array, $keys)
    {
        $original = &$array;

        $keys = (array) $keys;

        if (count($keys) === 0) {
            return;
        }

        foreach ($keys as $key) {
            if (static::exists($array, $key)) {
                unset($array[$key]);

                continue;
            }

            $parts = explode('.', $key);

            $array = &$original;

            while (count($parts) > 1) {
                $part = array_shift($parts);

                if (isset($array[$part]) && is_array($array[$part])) {
                    $array = &$array[$part];
                } else {
                    continue 2;
                }
            }

            unset($array[array_shift($parts)]);
        }
    }

    public static function get($array, $key, $default = null)
    {
        if (! static::accessible($array)) {
            return value($default);
        }

        if (is_null($key)) {
            return $array;
        }

        if (static::exists($array, $key)) {
            return $array[$key];
        }

        foreach (explode('.', $key) as $segment) {
            if (static::accessible($array) && static::exists($array, $segment)) {
                $array = $array[$segment];
            } else {
                return value($default);
            }
        }

        return $array;
    }

    public static function has($array, $keys)
    {
        if (is_null($keys)) {
            return false;
        }

        $keys = (array) $keys;

        if (! $array) {
            return false;
        }

        if ($keys === []) {
            return false;
        }

        foreach ($keys as $key) {
            $subKeyArray = $array;

            if (static::exists($array, $key)) {
                continue;
            }

            foreach (explode('.', $key) as $segment) {
                if (static::accessible($subKeyArray) && static::exists($subKeyArray, $segment)) {
                    $subKeyArray = $subKeyArray[$segment];
                } else {
                    return false;
                }
            }
        }

        return true;
    }

    public static function isAssoc(array $array)
    {
        $keys = array_keys($array);

        return array_keys($keys) !== $keys;
    }

    public static function only($array, $keys)
    {
        return array_intersect_key($array, array_flip((array) $keys));
    }

    public static function pluck($array, $value, $key = null)
    {
        $results = [];

        list($value, $key) = static::explodePluckParameters($value, $key);

        foreach ($array as $item) {
            $itemValue = data_get($item, $value);

            if (is_null($key)) {
                $results[] = $itemValue;
            } else {
                $itemKey = data_get($item, $key);

                $results[$itemKey] = $itemValue;
            }
        }

        return $results;
    }

    protected static function explodePluckParameters($value, $key)
    {
        $value = is_string($value) ? explode('.', $value) : $value;

        $key = is_null($key) || is_array($key) ? $key : explode('.', $key);

        return [$value, $key];
    }

    public static function prepend($array, $value, $key = null)
    {
        if (is_null($key)) {
            array_unshift($array, $value);
        } else {
            $array = [$key => $value] + $array;
        }

        return $array;
    }

    public static function pull(&$array, $key, $default = null)
    {
        $value = static::get($array, $key, $default);

        static::forget($array, $key);

        return $value;
    }

    public static function set(&$array, $key, $value)
    {
        if (is_null($key)) {
            return $array = $value;
        }

        $keys = explode('.', $key);

        while (count($keys) > 1) {
            $key = array_shift($keys);

            if (! isset($array[$key]) || ! is_array($array[$key])) {
                $array[$key] = [];
            }

            $array = &$array[$key];
        }

        $array[array_shift($keys)] = $value;

        return $array;
    }

    public static function sort($array, $callback)
    {
        return Collection::make($array)->sortBy($callback)->all();
    }

    public static function sortRecursive($array)
    {
        foreach ($array as &$value) {
            if (is_array($value)) {
                $value = static::sortRecursive($value);
            }
        }

        if (static::isAssoc($array)) {
            ksort($array);
        } else {
            sort($array);
        }

        return $array;
    }

    public static function where($array, callable $callback)
    {
        return array_filter($array, $callback, ARRAY_FILTER_USE_BOTH);
    }


	public static function crossJoin(...$arrays)
	{
		$results = [[]];

		foreach ($arrays as $index => $array) {
			$append = [];

			foreach ($results as $product) {
				foreach ($array as $item) {
					$product[$index] = $item;

					$append[] = $product;
				}
			}

			$results = $append;
		}

		return $results;
	}
}
