<?php

namespace App\Http\Controllers\Web;

use App\Exports\ReportPageExport;
use App\Http\Controllers\Controller;
use App\Http\Resources\Mis\FormattedPatientResource;
use App\Models\Department;
use App\Services\DateRangeService;
use App\Services\ReportPageService;
use App\Services\ReportService;
use Illuminate\Http\Request;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Auth;
use Inertia\Inertia;
use Maatwebsite\Excel\Facades\Excel;

class ReportController extends Controller
{
    public function __construct(
        protected ReportPageService $reportPageService,
        protected ReportService $reportService,
        protected DateRangeService $dateRangeService,
    ) {}

    public function index(Request $request)
    {
        $user = Auth::user();
        $departmentId = $request->query('departmentId', $user->department->department_id);
        $department = Department::where('department_id', $departmentId)->firstOrFail();
        $dateRange = $this->dateRangeService->getDateRangeFromRequest($request, $user);

        return Inertia::render('Report/Index', $this->reportPageService->build($department, $user, $dateRange));
    }

    public function store(Request $request)
    {
        $validated = $request->validate([
            'metrics' => 'required|array',
            'observationPatients' => 'nullable|array',
            'departmentId' => 'required|integer',
            'unwantedEvents' => 'nullable|array',
            'dates' => 'required|array',
            'userId' => 'required|integer',
            'reportId' => 'nullable|integer',
            'status' => 'nullable|in:draft,submitted',
        ]);

        $this->reportService->storeReport($validated, Auth::user());

        return redirect()->route('start');
    }

    public function export(Request $request)
    {
        $user = Auth::user();
        $departmentId = $request->query('departmentId', $user->department->department_id);
        $department = Department::where('department_id', $departmentId)->firstOrFail();
        $dateRange = $this->dateRangeService->getDateRangeFromRequest($request, $user);

        $statistics = $this->reportService->getReportStatistics($department, $user, $dateRange);
        $counts = $this->reportService->getPatientsCountsMap($department, $user, $dateRange);

        $statusGroups = [
            'МИС' => [
                'mis-plan' => 'Планово',
                'mis-emergency' => 'Экстренно',
                'mis-observation' => 'На контроле',
                'mis-reanimation' => 'Реанимация',
                'mis-outcome-discharged' => 'Выписанные',
                'mis-outcome-deceased' => 'Умершие',
                'mis-outcome-transferred' => 'Переведенные',
            ],
            'Спец. контингент' => [
                'special-plan' => 'Планово',
                'special-emergency' => 'Экстренно',
                'special-observation' => 'На контроле',
                'special-outcome-discharged' => 'Выписанные',
                'special-outcome-deceased' => 'Умершие',
                'special-outcome-transferred' => 'Переведенные',
            ],
        ];

        $summaryRows = [
            ['Показатель', 'Значение'],
            ['Отделение', $department->name_full],
            ['Период', $dateRange->startSql().' - '.$dateRange->endSql()],
            ['Сформирован', now('Asia/Yakutsk')->format('Y-m-d H:i:s')],
            ['Коек', $statistics['beds'] ?? 0],
            ['Поступило', $statistics['recipientCount'] ?? 0],
            ['Выбыло', $statistics['extractCount'] ?? 0],
            ['Состоит', $statistics['currentCount'] ?? 0],
            ['Умерло', $statistics['deadCount'] ?? 0],
            ['% смертности', $statistics['percentDead'] ?? 0],
            ['% загруженности', $statistics['percentLoadedBeds'] ?? 0],
            [''],
            ['Раздел / Статус', 'Количество'],
        ];

        foreach ($statusGroups as $groupLabel => $groupStatuses) {
            $summaryRows[] = [$groupLabel, ''];
            foreach ($groupStatuses as $status => $label) {
                $summaryRows[] = [$label, $counts[$status] ?? 0];
            }
        }

        $patientRows = [[
            'Раздел',
            'Статус',
            'ФИО',
            'Возраст',
            'Дата рождения',
            'Дата поступления',
            'Код диагноза',
            'Диагноз',
            'Операции',
            'Состояние (реанимация)',
            'Период закрыт (реанимация)',
        ]];

        foreach ($statusGroups as $groupLabel => $groupStatuses) {
            $patientRows[] = [$groupLabel, '', '', '', '', '', '', '', '', '', ''];

            foreach ($groupStatuses as $status => $label) {
                $patients = collect($this->reportService->getPatientsByStatus(
                    $department,
                    $user,
                    $status,
                    $dateRange
                ));

                if ($status === 'mis-reanimation') {
                    $this->attachReanimationIndicators($patients, (int) $department->department_id);
                }

                $resolvedPatients = FormattedPatientResource::collection($patients)->resolve();

                foreach ($resolvedPatients as $patient) {
                    $operations = collect($patient['operations'] ?? [])
                        ->map(fn ($operation) => $operation['code'] ?? $operation['name'] ?? null)
                        ->filter()
                        ->implode(', ');

                    $patientRows[] = [
                        $groupLabel,
                        $label,
                        $patient['fullname'] ?? '',
                        $patient['age'] ?? '',
                        $patient['birth_date'] ?? '',
                        $patient['admitted_at'] ?? '',
                        $patient['mkb']['ds'] ?? '',
                        $patient['mkb']['name'] ?? '',
                        $operations,
                        $patient['reanimation_indicator'] ?? '',
                        isset($patient['reanimation_is_complete']) && $patient['reanimation_is_complete'] ? 'Да' : 'Нет',
                    ];
                }
            }
        }

        $fileName = sprintf(
            'report_%d_%s.xlsx',
            $department->department_id,
            now('Asia/Yakutsk')->format('Ymd_His')
        );

        return Excel::download(new ReportPageExport($summaryRows, $patientRows), $fileName);
    }

    private function attachReanimationIndicators(Collection $patients, int $departmentId): void
    {
        if ($patients->isEmpty()) {
            return;
        }

        $medicalHistoryIds = $patients
            ->map(fn ($patient) => (int) ($patient->medicalHistoryId ?? $patient->MedicalHistoryID ?? 0))
            ->filter()
            ->unique()
            ->values()
            ->all();

        if (empty($medicalHistoryIds)) {
            return;
        }

        $latestIndicators = $this->reportService->getLatestReanimationIndicators($departmentId, $medicalHistoryIds);

        $patients->transform(function ($patient) use ($latestIndicators) {
            $medicalHistoryId = (int) ($patient->medicalHistoryId ?? $patient->MedicalHistoryID ?? 0);
            $indicator = $medicalHistoryId ? $latestIndicators->get($medicalHistoryId) : null;

            $patient->reanimation_indicator = $indicator?->indicator;
            $patient->reanimation_comment = $indicator?->comment;

            return $patient;
        });
    }
}