<?php

namespace App\Infrastructure\Reports\Services;

use App\Domain\Reports\Models\ReportSnapshot;
use App\Domain\Reports\ValueObjects\MetrikaConfig;
use App\Models\MedicalHistorySnapshot;
use App\Models\MetrikaResult;
use App\Models\Report;
use App\Models\User;
use App\Services\DateRangeService;
use App\Services\SnapshotService;
use DateTimeImmutable;
use Illuminate\Support\Facades\DB;

/**
 * Legacy-compatible save orchestration for report persistence.
 *
 * New architecture uses EloquentReportRepository directly; this service keeps
 * the old ReportService public API thin while the cutover is still gradual.
 */
class ReportSaveOrchestrator
{
    public function __construct(
        private readonly DateRangeService $dateRangeService,
        private readonly SnapshotService $snapshotService,
        private readonly ReportStorageService $reportStorageService,
        private readonly CalculatedMetricsSynchronizer $calculatedMetricsSynchronizer,
        private readonly ReportMetricsFinalizer $reportMetricsFinalizer,
        private readonly ReportRuntimeService $reportRuntimeService,
    ) {}

    /**
     * @param  array<string, mixed>  $data
     */
    public function storeReport(array $data, User $user, bool $fillableAuto = false): Report
    {
        $this->reportRuntimeService->prepareForHeavySave();
        $snapshot = $this->buildSnapshot($data, $user, $fillableAuto);

        $report = DB::transaction(function () use ($snapshot, $user, $data, $fillableAuto) {
            $report = $this->reportStorageService->createOrUpdateReport($snapshot, $user);
            $this->reportStorageService->saveMetrics($report, $snapshot);
            $this->reportStorageService->saveUnwantedEvents($report, $snapshot);
            $this->reportStorageService->saveObservationPatients($report, $snapshot);

            $this->snapshotService->createPatientSnapshots(
                $report,
                $user,
                [
                    $snapshot->periodStart->getTimestamp(),
                    $snapshot->periodEnd->getTimestamp(),
                ],
                $fillableAuto
            );

            $this->syncCalculatedMetrics($report, $user, $data);

            return $report;
        });

        DB::transaction(function () use ($report) {
            $this->finalizeStoredReport($report);
            $this->saveLethalMetricFromSnapshots($report);
        });

        $this->reportRuntimeService->clearCacheAfterReportCreation($user, $report);

        return $report;
    }

    public function syncCalculatedMetrics(Report $report, User $user, array $data): void
    {
        $this->calculatedMetricsSynchronizer->sync($report, $user, $data);
    }

    public function finalizeStoredReport(Report $report): void
    {
        $this->reportMetricsFinalizer->finalize($report);
    }

    public function saveLethalMetricFromSnapshots(Report $report): void
    {
        $snapshots = MedicalHistorySnapshot::query()
            ->where('rf_report_id', $report->report_id)
            ->whereIn('patient_type', ['discharged', 'deceased'])
            ->with('medicalHistory')
            ->get();

        if ($snapshots->isNotEmpty()) {
            return;
        }

        MetrikaResult::query()->updateOrCreate(
            [
                'rf_report_id' => $report->report_id,
                'rf_metrika_item_id' => MetrikaConfig::AVERAGE_BED_DAYS,
            ],
            ['value' => 0]
        );

        \Log::info("No discharged patients in report {$report->report_id}, saved 0");
    }

    private function buildSnapshot(array $data, User $user, bool $fillableAuto): ReportSnapshot
    {
        $dateRange = $this->dateRangeService->getNormalizedDateRange(
            $user,
            (string) ($data['dates'][0] ?? null),
            (string) ($data['dates'][1] ?? null)
        );

        $rangeEndAt = $dateRange->endSql();
        $createdAt = $data['created_at'] ?? $rangeEndAt;
        $sentAt = $data['sent_at'] ?? $rangeEndAt;

        return new ReportSnapshot(
            departmentId: (int) $data['departmentId'],
            userId: (int) $data['userId'],
            actorUserId: (int) $user->id,
            periodStart: new DateTimeImmutable($dateRange->startSql()),
            periodEnd: new DateTimeImmutable($dateRange->endSql()),
            status: (string) ($data['status'] ?? 'draft'),
            autoFill: $fillableAuto,
            metrics: MetrikaConfig::normalizeMetrics((array) ($data['metrics'] ?? [])),
            observationPatients: $this->normalizeObservationPatients((array) ($data['observationPatients'] ?? [])),
            unwantedEvents: $this->normalizeUnwantedEvents((array) ($data['unwantedEvents'] ?? [])),
            reportId: isset($data['reportId']) && $data['reportId'] ? (int) $data['reportId'] : null,
            createdAt: new DateTimeImmutable((string) $createdAt),
            sentAt: new DateTimeImmutable((string) $sentAt),
        );
    }

    /**
     * @param  array<int, array<string, mixed>>  $patients
     * @return array<int, array<string, mixed>>
     */
    private function normalizeObservationPatients(array $patients): array
    {
        return array_values(array_map(static function (array $patient): array {
            return [
                'medical_history_id' => $patient['medical_history_id'] ?? $patient['id'] ?? null,
                'department_patient_id' => $patient['department_patient_id'] ?? null,
                'comment' => $patient['comment'] ?? null,
            ];
        }, $patients));
    }

    /**
     * @param  array<int, array<string, mixed>>  $events
     * @return array<int, array<string, mixed>>
     */
    private function normalizeUnwantedEvents(array $events): array
    {
        return array_values(array_map(static function (array $event): array {
            return [
                'unwanted_event_id' => $event['unwanted_event_id'] ?? null,
                'title' => $event['title'] ?? '',
                'comment' => $event['comment'] ?? '',
                'is_visible' => (bool) ($event['is_visible'] ?? true),
            ];
        }, $events));
    }
}