<?php

namespace App\Http\Controllers;

use Illuminate\Support\Arr;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class StatisticController extends Controller
{
    public $map = [
        'test' => 0, // The sum of all tasks that are under review
        'total' => 0, // Sum of all tasks
        'overdue' => 0, // The sum of all overworked tasks
        'spent_time' => 0, // The sum of all the minutes spent on tasks
        'estimated_time' => 0, // The sum of all the minutes spent performing tasks is estimated
        'over_spent_time' => 0, // The sum of all the minutes spent overworking tasks
        'under_spent_time' => 0, // The sum of all the minutes left until estimated time
    ];

    public function index(Request $request, int $business, ?int $project = null)
    {
        $builder = DB::table('tasks')->where('business_id','=',$business);
        if ($project) {
            $builder->where('project_id', '=', $project);
        }
        $tasks = $builder->get();

        $tags = DB::table('tag_task')
            ->whereIn('task_id', $tasks->pluck('id')->toArray())
            ->get()
            ->groupBy('task_id')
            ->toArray();


        $result = [];

        foreach ($tasks as $task) {

            $this->addProjects($result, $task);

            $this->addSprints($result, $task);

            $this->addSystems($result, $task);

            $this->addTags($result, $task, $tags[$task->id]);
        }

        return $result;
    }


    public function addProjects(&$result, $task)
    {
        $key = "projects.{$task->project_id}";

        $this->subset($key, $result, $task);
    }

    public function addSprints(&$result, $task)
    {
        $key  = "projects.{$task->project_id}.";
        $key .= 'sprints.';
        $key .= ($task->sprint_id ?? 0) . '.';
        $key .= ($task->assignee_id ?? 0) . '.';
        $key .= $task->workflow_id . '.';
        $key .= $task->status_id;

        $this->subset($key, $result, $task);
    }

    public function addSystems(&$result, $task)
    {
        $key  = "projects.{$task->project_id}.";
        $key .= 'systems.';
        $key .= ($task->system_id ?? 0) . '.';
        $key .= ($task->assignee_id ?? 0) . '.';
        $key .= $task->workflow_id . '.';
        $key .= $task->status_id;

        $this->subset($key, $result, $task);
    }

    public function addTags(&$result, $task, $tags)
    {
        foreach ($tags as $tag) {
            $key  = "projects.{$task->project_id}.";
            $key .= 'tags.';
            $key .= $tag->id . '.';
            $key .= ($task->assignee_id ?? 0) . '.';
            $key .= $task->workflow_id . '.';
            $key .= $task->status_id;

            $this->subset($key, $result, $task);
        }
    }

    public function subset($key , &$result, $task)
    {
        $node = Arr::get($result, $key, $this->map);

        $node['test'] += $task->ready_to_test;
        $node['total'] += 1;
        $node['overdue'] += !$task->on_time;
        $node['spent_time'] += $task->spent_time;
        $node['estimated_time'] += $task->estimated_time;
        $node['over_spent_time'] += $task->estimated_time < $task->spent_time ? $task->spent_time - $task->estimated_time : 0;
        $node['under_spent_time'] += $task->estimated_time > $task->spent_time ? $task->estimated_time - $task->spent_time : 0;

        Arr::set($result, $key, $node);
    }
}