<?php
namespace App\Http\Api;

use App\Models\Task;
use App\Models\TaskRelation;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\App;
use App\Tools\RedisClusters;

class TaskApi{
    public static function getById($id){
        if(!$id){
            return null;
        };
        $task = Task::where('id',$id)->first();
        if($task){
            return [
                'id'=>$id,
                'title'=>$task->title,
                'description'=>$task->description,
            ];
        }else{
            return null;
        }
    }

    public static function getListByIds($ids){
        if(!$ids){
            return null;
        };
        $tasks = Task::whereIn('id',$ids)->get();
        $output = array();
        foreach ($ids as $key => $id) {
            foreach ($tasks as $task) {
                if($task->id === $id){
                    $output[] = [
                        'id'=>$id,
                        'title'=>$task->title,
                        'description'=>$task->description,
                    ];
                    continue;
                };
            }
        }
        return $output;
    }

    public static function setRelationTasks($taskId,$relationTasksId,$editor_id,$relation='pre'){
        if($relation==='pre'){
            $where = 'next_task_id';
            $task1 = 'task_id';
            $task2 = 'next_task_id';
        }else{
            $where = 'task_id';
            $task1 = 'next_task_id';
            $task2 = 'task_id';
        }
        $delete = TaskRelation::where($where,$taskId)
                        ->delete();
        foreach ($relationTasksId as $key => $id) {
            $data[] = [
                'id' => Str::uuid(),
                $task1 => $id,
                $task2 => $taskId,
                'editor_id' => $editor_id,
            ];
        }
        if(isset($data)){
            TaskRelation::insert($data);
        }
        TaskApi::removeTaskRelationRedisKey($taskId,$relation);
    }
    public static function getRelationTasks($taskId,$relation='pre'){
        $key = TaskApi::taskRelationRedisKey($taskId,$relation);
        RedisClusters::remember($key,3*24*3600,function() use($taskId,$relation){
            if($relation==='pre'){
                $where = 'next_task_id';
                $select = 'task_id';
            }else{
                $where = 'task_id';
                $select = 'next_task_id';
            }
            $tasks = TaskRelation::where($where,$taskId)
                        ->select($select)->get();
            $tasksId = [];
            foreach ($tasks as $key => $task) {
                $tasksId[] = $task[$select];
            }
            return TaskApi::getListByIds($tasksId);
		});
    }

    public static function getNextTasks($taskId){
        return TaskApi::getRelationTasks($taskId,'next');
    }
    public static function getPreTasks($taskId){
        return TaskApi::getRelationTasks($taskId,'pre');
    }
    public static function removeTaskRelationRedisKey($taskId,$relation='pre'){
        $key = TaskApi::taskRelationRedisKey($taskId,$relation);
        RedisClusters::forget($key);
    }
    public static function taskRelationRedisKey($taskId,$relation='pre'){
        return "task/relation/{$relation}/{$taskId}";
    }
}