<?php

namespace App\Services;

use App\Domain\Reports\ValueObjects\MetrikaConfig;
use App\Infrastructure\Reports\Services\SnapshotPersistenceService;
use App\Infrastructure\Reports\Sources\SnapshotPatientSource;
use App\Models\Department;
use App\Models\MedicalHistorySnapshot;
use App\Models\MisStationarBranch;
use App\Models\Report;
use App\Models\User;
use Carbon\Carbon;
use Illuminate\Support\Collection;

class SnapshotService
{
    public function __construct(
        protected UnifiedPatientService $unifiedPatientService,
        protected PatientService $patientService,
        protected DateRangeService $dateRangeService,
        ?SnapshotPersistenceService $snapshotPersistenceService = null,
        ?SnapshotPatientSource $snapshotPatientSource = null,
    ) {
        $this->snapshotPersistenceService = $snapshotPersistenceService ?? app(SnapshotPersistenceService::class);
        $this->snapshotPatientSource = $snapshotPatientSource ?? app(SnapshotPatientSource::class);
    }

    protected SnapshotPersistenceService $snapshotPersistenceService;

    protected SnapshotPatientSource $snapshotPatientSource;

    /**
     * Создать снапшоты пациентов для отчета
     */
    public function createPatientSnapshots(Report $report, User $user, array $dates, $fillableAuto = false): void
    {
        $this->logSnapshotMemory('snapshots:start', [
            'report_id' => $report->report_id,
            'department_id' => $report->rf_department_id,
            'fillable_auto' => (bool) $fillableAuto,
        ]);

        $department = Department::query()->where('department_id', $report->rf_department_id)->first() ?? $user->department;
        $branchId = $department
            ? $this->getBranchId($department->rf_mis_department_id)
            : null;

        if (! $department || ! $branchId) {
            return;
        }

        $this->snapshotPersistenceService->clearReportSnapshots($report);
        $this->logSnapshotMemory('snapshots:after_delete_old', [
            'report_id' => $report->report_id,
        ]);

        [$startDate, $endDate] = $this->parseDates($dates);
        $dateRange = $this->dateRangeService->getNormalizedDateRange($user, $startDate, $endDate);
        $metrics = [];

        $this->logSnapshotMemory('snapshots:before_plan_load', ['report_id' => $report->report_id]);
        $planPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'plan',
            $dateRange,
            $branchId,
            false,
            ! $fillableAuto,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_plan_load', [
            'report_id' => $report->report_id,
            'count' => $planPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'plan', $planPatients);
        $this->logSnapshotMemory('snapshots:after_plan_save', ['report_id' => $report->report_id]);
        $metrics[MetrikaConfig::PLAN] = $planPatients->count();

        $this->logSnapshotMemory('snapshots:before_emergency_load', ['report_id' => $report->report_id]);
        $emergencyPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'emergency',
            $dateRange,
            $branchId,
            false,
            ! $fillableAuto,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_emergency_load', [
            'report_id' => $report->report_id,
            'count' => $emergencyPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'emergency', $emergencyPatients);
        $this->logSnapshotMemory('snapshots:after_emergency_save', ['report_id' => $report->report_id]);
        $metrics[MetrikaConfig::EMERGENCY] = $emergencyPatients->count();

        $this->logSnapshotMemory('snapshots:before_discharged_load', ['report_id' => $report->report_id]);
        $dischargedPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'outcome-discharged',
            $dateRange,
            $branchId,
            false,
            null,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_discharged_load', [
            'report_id' => $report->report_id,
            'count' => $dischargedPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'discharged', $dischargedPatients);
        $this->logSnapshotMemory('snapshots:after_discharged_save', ['report_id' => $report->report_id]);
        $metrics[MetrikaConfig::DISCHARGED] = $dischargedPatients->count();

        $this->logSnapshotMemory('snapshots:before_transferred_load', ['report_id' => $report->report_id]);
        $transferredPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'outcome-transferred',
            $dateRange,
            $branchId,
            false,
            null,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_transferred_load', [
            'report_id' => $report->report_id,
            'count' => $transferredPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'transferred', $transferredPatients);
        $this->logSnapshotMemory('snapshots:after_transferred_save', ['report_id' => $report->report_id]);
        $metrics[MetrikaConfig::TRANSFERRED] = $transferredPatients->count();

        $this->logSnapshotMemory('snapshots:before_deceased_load', ['report_id' => $report->report_id]);
        $deceasedPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'outcome-deceased',
            $dateRange,
            $branchId,
            false,
            null,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_deceased_load', [
            'report_id' => $report->report_id,
            'count' => $deceasedPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'deceased', $deceasedPatients);
        $this->logSnapshotMemory('snapshots:after_deceased_save', ['report_id' => $report->report_id]);

        $this->logSnapshotMemory('snapshots:before_recipient_load', ['report_id' => $report->report_id]);
        $recipientPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'recipient',
            $dateRange,
            $branchId,
            false,
            null,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_recipient_load', [
            'report_id' => $report->report_id,
            'count' => $recipientPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'recipient', $recipientPatients);
        $this->logSnapshotMemory('snapshots:after_recipient_save', ['report_id' => $report->report_id]);

        $this->logSnapshotMemory('snapshots:before_current_load', ['report_id' => $report->report_id]);
        $currentPatients = $this->unifiedPatientService->getLivePatientsByStatus(
            $department,
            $user,
            'current',
            $dateRange,
            $branchId,
            false,
            null,
            $fillableAuto,
            true
        );
        $this->logSnapshotMemory('snapshots:after_current_load', [
            'report_id' => $report->report_id,
            'count' => $currentPatients->count(),
        ]);
        $this->snapshotPersistenceService->createSnapshotsForType($report, 'current', $currentPatients);
        $this->logSnapshotMemory('snapshots:after_current_save', ['report_id' => $report->report_id]);

        $planSurgeryCount = $this->patientService->getSurgicalPatients(
            'plan',
            $branchId,
            $dateRange,
            true
        );
        $emergencySurgeryCount = $this->patientService->getSurgicalPatients(
            'emergency',
            $branchId,
            $dateRange,
            true
        );

        $this->snapshotPersistenceService->saveMetrics($report, $metrics);
        $this->logSnapshotMemory('snapshots:after_save_metrics', ['report_id' => $report->report_id]);
    }

    private function logSnapshotMemory(string $stage, array $context = []): void
    {
        \Log::info('report.snapshot.memory', [
            'stage' => $stage,
            'memory_mb' => round(memory_get_usage(true) / 1024 / 1024, 2),
            'peak_mb' => round(memory_get_peak_usage(true) / 1024 / 1024, 2),
            ...$context,
        ]);
    }

    /**
     * Получить статистику из снапшотов
     */
    public function getStatisticsFromSnapshots(array $reportIds): array
    {
        return $this->snapshotPatientSource->getStatisticsFromSnapshots($reportIds);
    }

    /**
     * Получить пациентов из снапшотов по типу
     */
    public function getPatientsFromSnapshots(
        string $type,
        array $reportIds,
        ?int $branchId = null,
        bool $onlyIds = false,
        bool $markRecipients = false,
        ?array $recipientReportIds = null
    ): Collection {
        return $this->snapshotPatientSource->getPatientsFromSnapshots(
            $type,
            $reportIds,
            $onlyIds,
            $markRecipients,
            $recipientReportIds
        );
    }

    public function getPatientsFromOneDayCurrentSnapshots(
        string $type,
        array $reportIds,
        bool $onlyIds = false,
        ?array $recipientReportIds = null
    ): Collection {
        return $this->snapshotPatientSource->getPatientsFromOneDayCurrentSnapshots(
            $type,
            $reportIds,
            $onlyIds,
            $recipientReportIds
        );
    }

    /**
     * Получить ID отделения
     */
    private function getBranchId(int $misDepartmentId): ?int
    {
        return MisStationarBranch::where('rf_DepartmentID', $misDepartmentId)
            ->value('StationarBranchID');
    }

    /**
     * Разобрать даты
     */
    private function parseDates(array $dates): array
    {
        return [
            Carbon::createFromTimestampMs($dates[0])->setTimezone('Asia/Yakutsk'),
            Carbon::createFromTimestampMs($dates[1])->setTimezone('Asia/Yakutsk'),
        ];
    }
}