<?php

namespace App\Http\Controllers\Api;

use App\Admin\Services\WorkFlowService;
use App\Enums\CheckStatus;
use App\Exceptions\RuntimeException;
use App\Http\Resources\TaskResource;
use App\Http\Resources\WorkflowLogResource;
use App\Models\TaskHygiene;
use App\Models\WorkflowCheck;
use App\Models\WorkflowLog;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Rule;

class WorkflowController extends Controller
{
    public function index(Request $request)
    {
        $request->validate([
            'subject_type' => 'required',
        ]);
        $subjectType = $request->input('subject_type');
        $user = $this->guard()->user();
        $include = ['check'];
        if ($request->input('include')) {
            $explodes = explode(',', $request->input('include'));
            $include = array_merge($include, $explodes);
        }

        $orderBy = <<<'MySQL'
        CASE
            WHEN check_status = 2 THEN 100
            ELSE 0
        END
MySQL;

        $list = WorkflowLog::with($include)
            ->whereHas('check', fn ($q) => $q->where('subject_type', $subjectType))
            ->own($user)
            ->where('check_status', '>', CheckStatus::None->value)
            ->orderBy(DB::raw($orderBy), 'DESC')
            ->orderBy('id', 'desc')
            ->paginate($request->input('per_page'));

        return WorkflowLogResource::collection($list);
    }

    public function show($id, Request $request, WorkFlowService $service)
    {
        $include = ['check'];
        if ($request->input('include')) {
            $explodes = explode(',', $request->input('include'));
            $include = array_merge($include, $explodes);
        }
        $info = WorkflowLog::with($include)->findOrFail($id);

        // 当前用户是否可以审核
        $checkable = false;
        $user = $this->guard()->user();
        if ($user && $info->check_status == CheckStatus::Processing && $service->authCheck($user, $info)) {
            $checkable = true;
        }

        return ['data' => WorkflowLogResource::make($info), 'checkable' => $checkable];
    }

    public function logs($id, Request $request)
    {
        $check = WorkflowCheck::findOrFail($id);
        $logs = $check->logs()->with(['checkUser'])->sort()->get();

        return WorkflowLogResource::collection($logs);
    }

    public function cancel($id, Request $request, WorkFlowService $workFlowService)
    {
        $user = $this->guard()->user();
        $check = WorkflowCheck::where('employee_id', $user->id)->findOrFail($id);
        try {
            DB::beginTransaction();
            if (! $workFlowService->cancel($check)) {
                throw new RuntimeException($workFlowService->getError());
            }

            DB::commit();

            return response('', Response::HTTP_OK);
        } catch (\Exception $e) {
            DB::rollBack();
            throw new RuntimeException($e->getMessage());
        }
    }

    public function check($id, Request $request, WorkFlowService $workFlowService)
    {
        $request->validate([
            'status' => ['required'],
            'remarks' => [Rule::requiredIf(fn () => ! $request->input('status'))],
        ], [
            'remarks.required_if' => '未通过原因必填',
        ]);
        $log = WorkflowLog::findOrFail($id);
        $user = $this->guard()->user();
        try {
            DB::beginTransaction();
            if (! $workFlowService->check($user, $log, (bool) $request->input('status'), ['remarks' => $request->input('remarks')])) {
                throw new RuntimeException($workFlowService->getError());
            }

            DB::commit();

            return response('', Response::HTTP_OK);
        } catch (\Exception $e) {
            DB::rollBack();
            throw new RuntimeException($e->getMessage());
        }
    }

    protected function mapResource(string $model)
    {
        $class = match ($model) {
            TaskHygiene::class => TaskResource::class,
            default => 'App\\Http\\Resources\\'.class_basename($model).'Resource',
        };

        if (! class_exists($class)) {
            throw new RuntimeException('未知的 subject_type');
        }

        return $class;
    }
}