<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Department;
use App\Models\DutyUnwantedEvent;
use App\Models\ReportDutyPatient;
use App\Services\DateRangeService;
use App\Services\ReportService;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;

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

    public function getUnwantedEvents(Request $request)
    {
        $user = Auth::user();
        $validated = $request->validate([
            'startAt' => 'required',
            'endAt' => 'required',
            'departmentId' => 'required',
        ]);

        $dateRange = $this->dateRangeService->getNormalizedDateRange($user, $validated['startAt'], $validated['endAt']);
        $department = Department::findSole($request->departmentId, 'department_id');

        $unwantedEvents = DutyUnwantedEvent::query()
            ->whereHas('reportDuty', function ($q) use ($department, $dateRange) {
                $q->where('rf_department_id', $department->department_id)
                    ->where('period_start', '>=', $dateRange->startSql())
                    ->where('period_end', '<=', $dateRange->endSql());
            })
            ->get()
            ->map(fn ($e) => [
                ...$e->toArray(),
                'created_at' => Carbon::parse($e->created_at)->format('Создано d.m.Y в H:i'),
            ]);

        return response()->json($unwantedEvents);
    }

    public function getObservablePatients(Request $request)
    {
        $user = Auth::user();
        $validated = $request->validate([
            'startAt' => 'required',
            'endAt' => 'required',
            'departmentId' => 'required',
        ]);

        $dateRange = $this->dateRangeService->getNormalizedDateRange($user, $validated['startAt'], $validated['endAt']);
        $department = Department::findSole($request->departmentId, 'department_id');

        $observablePatients = DB::table('observable_medical_histories as omh')
            ->join('report_duty_patients as rdp', 'rdp.original_id', '=', 'omh.original_id')
            ->join('report_duties as rd', 'rd.id', '=', 'rdp.report_duty_id')
            ->leftJoin('report_duty_migration_patients as rdm', function ($join) {
                $join->on('rdm.medical_history_id', '=', 'rdp.id')
                    ->whereNull('rdm.out_date');
            })
            ->where('rd.rf_department_id', $department->department_id)
            ->where('omh.observable_in', '>=', $dateRange->startSql())
            ->where('omh.observable_in', '<=', $dateRange->endSql())
            ->select('omh.*', 'rdm.diagnosis_code', 'rdm.diagnosis_name', 'rdm.ingoing_date as migration_ingoing_date')
            ->distinct()
            ->get()
            ->map(fn ($row) => [
                'id'               => $row->id,
                'full_name'        => $row->full_name,
                'birth_date'       => $row->birth_date,
                'comment'          => $row->comment,
                'observable_reason'=> $row->observable_reason,
                'observable_in'    => $row->observable_in,
                'observable_out'   => $row->observable_out,
                'migrations'       => [[
                    'ingoing_date'   => $row->migration_ingoing_date ?? $row->recipient_date,
                    'diagnosis_code' => $row->diagnosis_code,
                    'diagnosis_name' => $row->diagnosis_name,
                ]],
                'operations'       => [],
            ]);

        return response()->json($observablePatients);
    }

    public function getDeadPatients(Request $request)
    {
        $user = Auth::user();
        $departmentType = $request->query('departmentType');
        $availableDepartments = $user->availableDepartments()->pluck('department_id')->all();

        $validated = $request->validate([
            'startAt' => 'required',
            'endAt' => 'required',
        ]);

        $dateRange = $this->dateRangeService->getNormalizedDateRange($user, $validated['startAt'], $validated['endAt']);

        $lastMigrations = DB::table('report_duty_migration_patients')
            ->select('id', DB::raw('MAX(ingoing_date) as max_ingoing_date'))
            ->where('ingoing_date', '>=', $dateRange->startSql())
            ->where('ingoing_date', '<=', $dateRange->endSql())
            ->groupBy('id');

        $deadPatients = DB::table('report_duty_migration_patients as rdm')
            ->joinSub($lastMigrations, 'last_rdm', function ($join) {
                $join->on('rdm.id', '=', 'last_rdm.id')
                    ->on('rdm.ingoing_date', '=', 'last_rdm.max_ingoing_date');
            })
            ->leftJoin('report_duty_patients as rdp', 'rdm.id', '=', 'rdp.id')
            ->join('report_duties as rd', 'rd.id', '=', 'rdp.report_duty_id')
            ->join('departments as dep', 'dep.department_id', '=', 'rd.rf_department_id')
            ->whereIn('rd.rf_department_id', $availableDepartments)
            ->whereNotNull('rdp.death_date')
            ->select(
                'rdp.id', 'rdp.full_name', 'rdp.birth_date', 'rdp.recipient_date', 'rdm.ingoing_date',
                'rdm.diagnosis_code', 'rdm.diagnosis_name', 'dep.name_full'
            )
            ->orderBy('rdm.ingoing_date', 'desc')
            ->orderBy('rdm.id', 'desc')
            ->get()
            ->groupBy('medical_history_id') // Группируем по id пациента
            ->map(fn ($rows) => $rows->first()) // Берем первую (самую последнюю) запись
            ->values()
            ->map(fn ($row) => [
                'id'              => $row->id,
                'full_name'       => $row->full_name,
                'birth_date'      => $row->birth_date,
                'ingoing_date'    => $row->ingoing_date ?? $row->recipient_date,
                'diagnosis_code'  => $row->diagnosis_code,
                'diagnosis_name'  => $row->diagnosis_name,
                'department_name' => $row->name_full,
            ]);

        $deadPatients = ReportDutyPatient::query()
            ->whereHas('latestMigration', function ($query) use ($dateRange) {
                $query->where('ingoing_date', '<=', $dateRange->endSql())
                    ->where(function ($sub) use ($dateRange) {
                        // Миграции без out_date (еще лежат)
                        $sub->whereNull('out_date');

                        // Миграции с out_date (закрытые)
                        $sub->orWhere(function ($sub2) use ($dateRange) {
                            $sub2->whereNotNull('out_date')
                                ->where('out_date', '>', $dateRange->startSql());
                        });
                    });
            })
            ->with('latestMigration')
            ->whereNotNull('death_date')
            ->get()->unique('original_id')->values()
            ->map(fn ($row) => [
                'id'              => $row->id,
                'full_name'       => $row->full_name,
                'birth_date'      => $row->birth_date,
                'ingoing_date'    => $row->latestMigration->ingoing_date ?? $row->recipient_date,
                'diagnosis_code'  => $row->latestMigration->diagnosis_code,
                'diagnosis_name'  => $row->latestMigration->diagnosis_name,
                'department_name' => $row->latestMigration->department->name_full,
            ]);

        return response()->json($deadPatients);
    }
}