<?php

namespace App\Models;

class Department extends SoftDeletesModel
{
    protected $table = "departments";

    public function parent()
    {
        return $this->belongsTo(Department::class, "pid");
    }

    public function users()
    {
        return $this->hasMany(Admin::class, "department_id");
    }

    public function leader()
    {
        return $this->hasOne(Admin::class, "id", "leader_id");
    }

    public function manager()
    {
        return $this->hasOne(Admin::class, "id", "manager_id");
    }

    public function getTopDepartments()
    {
        $all = Department::get()->toArray();
        $top_departments = $this->where("pid", 0)->get();
        foreach ($top_departments as $department) {
            $department->descendants = find_children($all, "id", "pid", $department->id);
        }
        return $top_departments;
    }

    public function getSelections()
    {
        $departments = $this->orderby("myindex")->get()->toArray();
        $departments = array2tree($departments);
        $departments = flatten_tree($departments);
        $level_symbol = "├";
        foreach ($departments as &$department) {
            $level_symbol_prefix = "";
            for ($i = 0; $i < $department["level"]; $i++) {
                $level_symbol_prefix .= $level_symbol;
            }
            $department["name"] = $level_symbol_prefix . $department["title"];
        }
        $departments = collect($departments)->pluck("name", "id")->toArray();
        return $departments;
    }
}