<?php
namespace App\Http\Controllers;

use App\Models\Activity;
use App\Models\CommentActivity;
use App\Models\Link;
use App\Models\Project;
use App\Models\TemplateGantt;
use App\Models\VersionGantt;
use App\Models\UserToActivity;
use Illuminate\Http\Request;

class ActivityController extends Controller
{
	public function getByGanttId($id, $proyek_id)
	{
		if(Activity::where('proyek_id', $proyek_id)->where("version_gantt_id", $id)->count() == 0) {
			$this->cloneTemplate($id, $proyek_id);
		}

		$dataGantt = $this->getDataActivity($id);

		return response()->json(['status'=>'success','data'=> $dataGantt,'code'=>200], 200);
	}

	private function getDataActivity($id)
	{
		$checkHeader = Activity::where('version_gantt_id', $id)->where('type_activity', 'header')->count(); $finalData = [];
		if($checkHeader > 0){
		    $dataHeader = Activity::where('version_gantt_id', $id)->where('type_activity', 'header')->first();
		    $startDate = date_create($dataHeader->start_date);
		    $endDate = date_create($dataHeader->end_date);
		    $dataHeader->start_date = date_format($startDate,"Y-m-d H:i:s");
		    $dataHeader->end_date = date_format($endDate,"Y-m-d H:i:s");
	 		$dataHeader->progress = $dataHeader->persentase_progress / 100;
			$dataHeader->planned_start = isset($dataHeader->planned_start) ? date_format(date_create($dataHeader->planned_start),"Y-m-d H:i:s") : NULL;
			$dataHeader->planned_end = isset($dataHeader->planned_end) ? date_format(date_create($dataHeader->planned_end),"Y-m-d H:i:s") : NULL;
		    $dataHeader->type = "header";
		    $dataHeader->text = $dataHeader->name;
		    $finalData[] = $dataHeader;
		    $data = Activity::where('version_gantt_id', $id)->where('parent_id', $dataHeader->id)->orderBy('id', 'asc')->get();
		}else{
		    $data = Activity::where('version_gantt_id', $id)->whereNull('parent_id')->orderBy('id', 'asc')->get();
		}

		foreach($data as $objRow){
			$type = "project";
			$dataChildren = $this->getChildren($id, $objRow->id);
			$startDate = date_create($objRow->start_date);
			$endDate = date_create($objRow->end_date);

			if($objRow->type_activity=="milestone")
				$type = $objRow->type_activity;
			if(empty($dataChildren))
				$type = "task";

			$objRow->text = $objRow->name;
			$objRow->parent = $objRow->parent_id ? $objRow->parent_id : null;
			$objRow->start_date = date_format($startDate,"Y-m-d H:i:s");
			$objRow->end_date = date_format($endDate,"Y-m-d H:i:s");
			$objRow->planned_start = isset($objRow->planned_start) ? date_format(date_create($objRow->planned_start),"Y-m-d H:i:s") : NULL;
			$objRow->planned_end = isset($objRow->planned_end) ? date_format(date_create($objRow->planned_end),"Y-m-d H:i:s") : NULL;
	 		$objRow->progress = $objRow->persentase_progress / 100;
			$objRow->type = $type;
			$finalData[] = $objRow;
			$finalData = array_merge($finalData, $dataChildren);
		}

		$dataLink = Link::where('version_gantt_id', $id)->get();
		$finalLink = [];
		foreach($dataLink as  $objRow)
		{
			$dataRow = array(
				'id'=>$objRow->id,
				'source'=>$objRow->s_activity_id,
				'target'=>$objRow->t_activity_id,
				'type'=>$objRow->type_link,
				'code'=>$objRow->code_link
			);
			if($objRow->lag)
				$dataRow['lag'] = $objRow->lag;
			$finalLink[] = $dataRow;
		}

		$resultData = array(
			"data"=>$finalData,
			"links"=>$finalLink
		);

		return $resultData;
	}

	private function getChildren($gantt_id, $parent_id)
	{
		$finalData = [];
		$data = Activity::where('version_gantt_id', $gantt_id)->where('parent_id', $parent_id)->orderBy('id', 'asc')->get();
		foreach($data as $objRow){
			$objRow->parent = $parent_id;
			$objRow->text = $objRow->name;
			$objRow->progress = (int)$objRow->persentase_progress/100;
			$startDate = date_create($objRow->start_date);
			$endDate = date_create($objRow->end_date);
			$objRow->start_date = date_format($startDate,"Y-m-d H:i:s");
			$objRow->end_date = date_format($endDate,"Y-m-d H:i:s");
			$objRow->planned_start = isset($objRow->planned_start) ? date_format(date_create($objRow->planned_start),"Y-m-d H:i:s") : NULL;
			$objRow->planned_end = isset($objRow->planned_end) ? date_format(date_create($objRow->planned_end),"Y-m-d H:i:s") : NULL;
			$dataChildren = $this->getChildren($gantt_id, $objRow->id);
			if($objRow->type_activity=="milestone"){
				$objRow->type = $objRow->type_activity;
			}elseif(empty($dataChildren)){
				$objRow->type = "task";
			}else{
				$objRow->type = "project";
			}
			$finalData[] = $objRow;
			$finalData = array_merge($finalData, $dataChildren);
		}
		return $finalData;
	}

	private function cloneTemplate($id, $proyek_id)
	{
		$project = Project::find($proyek_id);

		$rootActivity = Activity::create([
			'version_gantt_id'=>$id,
			'proyek_id'=>$proyek_id,
			'name'=> $project->nama,
			'kode_sortname'=>$project->kode_sortname,
			'start_date'=> $project->mulai_proyek,
			'end_date'=> $project->akhir_proyek,
			'rencana_biaya'=> $project->rencana_biaya,
			'type_activity'=> 'header',
			'created_by'=>$this->currentName,
		]);

		$resultTypeProject = TemplateGantt::where('proyek_type_id', $project->type_proyek_id)
			->whereNull('parent_id')
			->orderByRaw('id ASC')
			->get();

		foreach($resultTypeProject as $objRow){
			$childActivities = TemplateGantt::where("parent_id", $objRow->id)->count();
			$resultNew = Activity::create([
				'type_activity'=> $childActivities > 0 ? "project" : "task",
				'version_gantt_id'=>$id,
				'parent_id'=>$rootActivity->id,
				'proyek_id'=>$proyek_id,
				'name'=> $objRow->name_activity,
				'start_date'=>date("Y-m-d H:i:s"),
				'end_date'=>date("Y-m-d H:i:s"),
				'created_by'=>$this->currentName
			]);
			$this->getChildrenTemplate($id, $objRow->id, $project->type_project_id, $proyek_id, $resultNew->id, $project->mulai_proyek);
		}
	}

	private function getChildrenTemplate($id, $parent_id, $type_proyek_id, $proyek_id, $parent_new, $firstDay)
	{
		$data = TemplateGantt::where('parent_id', $parent_id)->orderByRaw('id ASC')->get();
		foreach($data as $objRow){
			$childActivities = TemplateGantt::where("parent_id", $objRow->id)->count();
			$resultNew = Activity::create([
				'type_activity'=> $childActivities > 0 ? "project" : "task",
				'version_gantt_id'=>$id,
				'parent_id'=>$parent_new,
				'proyek_id'=>$proyek_id,
				'name'=> $objRow->name_activity,
				'start_date'=>$firstDay,
				'end_date'=>$firstDay,
				'created_by'=>$this->currentName
			]);
			$this->getChildrenTemplate($id, $objRow->id, $type_proyek_id, $proyek_id, $resultNew->id, $firstDay);
		}
	}

	public function add(Request $request)
	{
		$this->validate($request, [
			'version_gantt_id'=>'required'
		]);

		$data = $request->all();
		$data['name'] = $request->text;
		$data['persentase_progress'] = $request->progress;
		$data['created_by'] = $this->currentName;
		$data['type_activity'] = "task";

		$parent = $data['parent_id'] ?? null;
		if($parent){
			$parentData = Activity::find($parent);
			if($parentData->parent_id) {
				$parentData->update(["type_activity" => "project"]);
			}
			CommentActivity::where('activity_id', $parent)->delete();
			UserToActivity::where('activity_id', $parent)->delete();
		}

		if(!$result = Activity::create($data))
			return response()->json(['status'=>'failed','action'=>'error','code'=> 500], 500);

		return response()->json(['status'=>'success','action'=>'inserted', 'tid'=>$result->id,'code'=>200], 200);
	}

	public function edit($id){
		if(empty($id) || !is_int((int)$id))
			return response()->json(['status'=>'failed','message'=>'id is required!','code'=>400], 400);

		if(!$result = Activity::find($id))
			return response()->json(['status'=>'failed','message'=>'Data not found!','code'=> 404], 404);

		return response()->json(['status'=>'success','code'=>200,'data'=> $result], 200);
	}

	public function update(Request $request, $id)
	{
		if(empty($id) || !is_int((int)$id))
			return response()->json(['status'=>'failed', 'action'=>'error','message'=>'id is required!','code'=>400], 400);

		$updateBobot = true;
		if(!$data = Activity::find($id))
			return response()->json(['status'=>'failed', 'action'=>'error','message'=>'Data not found!','code'=> 404], 404);
		$dataUpdate = $request->all();

		$dataUpdate['name'] = $request->text;
		$dataUpdate['persentase_progress'] = $request->progress*100;
		$dataUpdate['updated_by'] = $this->currentName;
		if($data->type_activity!='header')
			$dataUpdate['type_activity'] = $request->type;

		if(!$data->update($dataUpdate))
			return response()->json(['status'=>'failed', 'action'=>'error','message'=>'data activity failed updated!','code'=>400], 400);

		return response()->json(['status'=>'success','update_bobot'=> $updateBobot, 'data'=>$dataUpdate, 'action'=>'updated','message'=>'Activity updated!','code'=>200], 200);
	}

	public function updateRegular(Request $request, $id){
		if(empty($id) || !is_int((int)$id))
			return response()->json(['status'=>'failed','message'=>'id is required!','code'=>400], 400);

		$data = Activity::find($id);

		if(!$data = Activity::find($id))
			return response()->json(['status'=>'failed','message'=>'Data not found!','code'=> 404], 404);

		if(!$data->update($request->all()))
			return response()->json(['status'=>'failed','message'=>'Failed to update!','code'=> 500], 500);

		return response()->json(['status'=>'success','message'=>'Activity Updated!','code'=> 200], 200);
	}

	public function delete($id)
	{
		if(!$data = Activity::find($id))
			return response()->json(['status'=>'failed', 'action'=>'error','message'=> 'Data not found!','code'=> 404], 404);

		if(!$data->delete())
			return response()->json(['status'=>'failed', 'action'=>'error','message'=>'data activity failed deleted!','code'=> 500], 500);

		return response()->json(['status'=>'success', "action"=>"deleted",'message'=>'data activity successfully deleted!','code'=>200], 200);
	}

	public function getUpdate($id)
	{
		if(!$data = Activity::find($id))
			return response()->json(['status'=>'failed', 'action'=>'error','message'=> 'Data not found!','code'=>400], 400);

		$data->progress = (int) $data->persentase_progress / 100;
		$data->rencana_biaya = str_replace(".", ",", $data->rencana_biaya);
		return response()->json(['status'=>'success', "data"=> $data,'code'=>200], 200);
	}

	public function search(Request $request)
	{
		$dataBuilder = $this->setUpPayload($request->all(), 'm_activity');
		$builder = $dataBuilder['builder'];
		$countBuilder = $dataBuilder['count'];
		$dataGet = $builder->get();
		$totalRecord = $countBuilder->count();
		return response()->json(['status'=>'success','code'=>200,'data'=>$dataGet, 'totalRecord'=>$totalRecord], 200);
  }

  public function import(Request $request)
	{
    $data = $request->all();

		$data['created_by'] = $this->currentName;

		Activity::where('version_gantt_id', $data['ganttId'])->delete();

		$projectId = VersionGantt::where('id', $data['ganttId'])->first()->proyek_id;

		$activityStack = [];

		foreach ($data['activities'] as $i => $activity_row) {
			$startDate = \DateTime::createFromFormat('d-m-y', $activity_row['start_date']);
			$endDate = \DateTime::createFromFormat('d-m-y', $activity_row['end_date']);

			$input['name'] = $activity_row['name'];
			$input['proyek_id'] = $projectId;
			$input['version_gantt_id'] = $data['ganttId'];
			$input['parent_id'] = null;
			$input['start_date'] = $startDate->format('Y-m-d');
			$input['end_date'] = $endDate->format('Y-m-d');
			$input['duration'] = $activity_row['duration'];
			$input['bobot_planning'] = $activity_row['weight'];
			$input['persentase_progress'] = 0;
			$input['type_activity'] = $i == 0 ? "header" : "task";
      $input['created_by'] = $this->currentName;

			if (!$activity = Activity::create($input)) {
				Activity::where('version_gantt_id', $data['ganttId'])->delete();
				return response()->json(['status' => 'error', 'message' => 'Input failed on ' . $activity['name'], 'code' => 500], 500);
			}

			$data['activities'][$i]['activity_id'] = $activity->id;

			if ($i == 0) {
        $activity->type_activity = "project";
				$activity->save();
				$activity->level = $activity_row['level'];
				array_push($activityStack, $activity);
				continue;
			}

			$activity->level = $activity_row['level'];

			if ($lastStack = end($activityStack)) {
				$levelLowerThanLastStack = $activity->level < $lastStack->level;
				$levelEqualWithLastStack = $activity->level == $lastStack->level;

				if ($levelLowerThanLastStack) {
					$lastStackIsNotRight = $levelLowerThanLastStack;
					do {
						array_pop($activityStack);
						$lastStack = end($activityStack);
						if ($activity->level > $lastStack->level)
							$lastStackIsNotRight = false;
					} while ($lastStackIsNotRight);
				}

				if ($levelEqualWithLastStack) {
					array_pop($activityStack);
				}
			}

			$activity->parent_id = $activityStack[count($activityStack) - 1]->id ?? null;
			// there should be better way to except / filter attribute level before save because it's cause error
			// cant use except() / filter() on $activity collection somehow
			unset($activity->level);
			$activity->save();
			$activity->level = $activity_row['level'];

			if (@$activityStack[count($activityStack) - 1]->level != $activity->level && $activity->level != $data['activities'][$i - 1]['level']) {
				array_push($activityStack, $activity);
			}

			if ($activity->level < @$data['activities'][$i + 1]['level']) {
				unset($activity->level);
				$activity->type_activity = "project";
				$activity->save();
				$activity->level = $activity_row['level'];
			}

			if (!empty($activity_row['predecessor'])) {
				$key = array_search($activity_row['predecessor'], array_column($data['activities'], 'no'));

				if (!$predecessorActivity = Activity::find($data['activities'][$key]['activity_id']))
					continue;

				$predecessorFinishDate = new \DateTime($predecessorActivity->end_date);
				$interval = $predecessorFinishDate->diff(new \DateTime($activity->start_date));
				$diff = $interval->days;

				Link::create([
					'created_by' => $this->currentName,
					's_activity_id' => $predecessorActivity->id,
					't_activity_id' => $activity->id,
					'type_link' => 0,
					'code_link' => 'FS',
					'version_gantt_id' => $data['ganttId'],
					'lag' => $diff > 1 ? $diff : null,
				]);
			}
		}

		return response()->json(['stack' => $activityStack, 'status' => 'success', 'message' => 'Data imported!', 'projectId' => $projectId, 'code' => 200], 200);
	}     
}