<?php

namespace App\Services\Approval;

use App\Models\Approval;
use App\Models\ApprovalFlow;
use App\Models\Enums\ApprovalFlowObjectType;
use App\Models\Enums\ApprovalFlowType;
use App\Models\Enums\ApprovalMode;
use App\Models\Enums\ApprovalObjectType;
use App\Models\Enums\ObjectAction;
use App\Models\Enums\ObjectApprovalStatus;
use App\Repositories\ActionRepository;
use Illuminate\Support\Facades\Auth;

class StoreService
{
    public function store()
    {
        $request = request();

        $approvalObjectType = ApprovalObjectType::from($request->object_type);

        $approvalObject = $approvalObjectType->modelBuilderAllowed($request->object_id)->findOrFail($request->object_id);

        throw_validation_if(
            in_array($approvalObject?->approval_status, [ObjectApprovalStatus::DOING->value]),
            'Do not initiate duplicate approvals'
        );

        $approvalFlow = $this->getApprovalFlow($approvalObjectType, $approvalObject);

        $this->createApproval($approvalFlow, $approvalObjectType, $approvalObject->id, $request->remark);

        $this->changeApprovalStatus($approvalObject);

    }

    protected function createApproval(
        ApprovalFlow $approvalFlow, ApprovalObjectType $approvalObjectType, int $objectId,  string $remark = null
    ): void
    {
        $firstNode =  $approvalFlow->nodes[1];

        $approval = Approval::query()->create([
            'approval_flow_id' => $approvalFlow->id,
            'object_type' => $approvalObjectType->flowType()->value,
            'object_id' => $objectId,
            'node_level' => $firstNode['level'],
            'approval_mode' => $firstNode['approval_mode'],
            'users' => sprintf(",%s,", implode(',', $firstNode['approval_users'])),
            'remark' => $remark,
            'created_by' => Auth::id(),
            'status' => ObjectApprovalStatus::DOING,
            'company_id' => Auth::user()->company_id,
        ]);

        $extraFields = [
            'now' => 0,
            'next' => 1,
            'approval_mode' => $firstNode['approval_mode'],
        ];

        if ($approval->approval_mode == ApprovalMode::SEQUENTIAL_APPROVAL->value) {
            $extraFields['next_sequential_user'] = $firstNode['approval_users'][0];
        }

        ActionRepository::createByApproval(
            $approval,
            ObjectAction::APPROVAL_REQUEST,
            extraFields:  $extraFields,
        );
    }

    protected function changeApprovalStatus($approvalObject): void
    {
        $approvalObject->approval_status = ObjectApprovalStatus::DOING;
        $approvalObject->save();
    }

    protected function triggerAction (string $comment = null): void
    {
        $objectAction = match ($this->approval->status) {
            ObjectApprovalStatus::APPROVED->value => ObjectAction::APPROVAL_APPROVED,
            ObjectApprovalStatus::DOING->value => ObjectAction::APPROVED_TO_NEXT_NODE,
            ObjectApprovalStatus::REJECTED->value => ObjectAction::APPROVAL_REJECTED,
        };


    }

    protected function getApprovalFlow(ApprovalObjectType $approvalObjectType, $approvalObject)
    {
        $approvalFlow = ApprovalFlow::query()
            ->where("type", $approvalObjectType->flowType())
            ->when(
                $approvalObjectType->flowType() == ApprovalFlowType::TASK,
                fn ($query) => $query->orWhere([
                    'object_type' => ApprovalFlowObjectType::PROJECT->value,
                    'object_id' => $approvalObject->id,
                ])
            )
            ->where("status", 1)
            ->orderByDesc("created_at")
            ->first();
        throw_validation_if(! $approvalFlow, 'Clearly set up approval flow rules first.');

        return $approvalFlow;
    }
}