<?php

namespace App\Helpers;

use Carbon\Carbon;
use Illuminate\Support\Collection;

class OutstandingHelper
{
    /**
     * Filter a collection of forms to retrieve outstanding items based on role-driven rules.
     *
     * @param  Collection  $forms
     * @param  string      $role
     * @param  Carbon      $periodStart
     * @param  Carbon      $periodEnd
     * @param  array       $context
     * @return Collection
     */
    public static function filterForms(Collection $forms, string $role, Carbon $periodStart, Carbon $periodEnd, array $context = []): Collection
    {
        $regionId = $context['region_id'] ?? null;
        $cabangId = $context['cabang_id'] ?? null;

        return $forms->filter(function ($form) use ($role, $periodStart, $periodEnd, $regionId, $cabangId) {
            $tanggal = Carbon::parse($form->tanggal);
            if ($tanggal->lt($periodStart) || $tanggal->gt($periodEnd)) {
                return false;
            }

            $status = $form->status;
            switch ($role) {
                case 'Admin Region':
                    if ($status !== 'On Progress') {
                        return false;
                    }
                    if ($regionId && optional($form->user)->region_id !== $regionId) {
                        return false;
                    }
                    return true;

                case 'Area Manager Cabang':
                    if ($status !== 'Approved 1') {
                        return false;
                    }
                    if ($cabangId && optional($form->rayon)->cabang_id !== $cabangId) {
                        return false;
                    }
                    return true;

                case 'Marketing Information System':
                    return $status === 'Approved 1';

                case 'Marketing Operational Manager Region':
                    if ($status !== 'Approved 2') {
                        return false;
                    }
                    if (!is_null($form->final_approved_at) || !is_null($form->final_approved_by)) {
                        return false;
                    }
                    if ($regionId && optional($form->user)->region_id !== $regionId) {
                        return false;
                    }
                    return true;

                case 'Head of Sales Marketing':
                    if ($status !== 'Approved 2') {
                        return false;
                    }
                    return is_null($form->final_approved_at) || is_null($form->final_approved_by);

                default:
                    return is_null($form->final_approved_at) || is_null($form->final_approved_by);
            }
        });
    }
}