<?php

namespace App\Http\Controllers\Web;

use App\Http\Controllers\Controller;
use App\Models\Department;
use App\Models\MetrikaForm;
use App\Models\MetrikaGroup;
use App\Models\MetrikaItem;
use App\Models\MetrikaResult;
use App\Models\Report;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Validator;
use Inertia\Inertia;

class StatisticController extends Controller
{
    public function index(Request $request)
    {
        $user = $request->user();

        $userDepartment = $user->department;

        $data = [];

        $departments = Department::select('department_id', 'name_short')
            ->orderBy('name_short')->get();

        foreach ($departments as $department) {
            $allCount = MetrikaResult::whereHas('report', function ($query) use ($userDepartment, $department) {
                $query->where('rf_department_id', $department->department_id);
            })->where('rf_metrika_item_id', 3)
                ->sum(DB::raw('value::integer'));

            $leaveCount = MetrikaResult::whereHas('report', function ($query) use ($userDepartment, $department) {
                $query->where('rf_department_id', $department->department_id);
            })->where('rf_metrika_item_id', 7)
                ->sum(DB::raw('value::integer'));

            $consistCount = optional(MetrikaResult::where('rf_metrika_item_id', 8)
                ->whereHas('report', function (Builder $query) use ($department) {
                    $query->where('rf_department_id', $department->department_id);
                })->join('reports', 'metrika_results.rf_report_id', '=', 'reports.report_id')
                ->select('metrika_results.value')
                ->orderBy('reports.sent_at', 'desc')
                )->value('value') ?? 0;

            $beds = (int)optional($department->metrikaDefault()
                ->where('rf_metrika_item_id', 1)
                ->first())->value ?? 0;

            $occupiedBeds = (int)optional(Report::where('rf_department_id', $department->department_id)
                ->join('metrika_results', 'reports.report_id', '=', 'metrika_results.rf_report_id')
                ->where('metrika_results.rf_metrika_item_id', 8)
                ->orderBy('reports.sent_at', 'desc')
                ->first())->value ?? 0;

            $percentLoadedBeds = $beds > 0 ? round($occupiedBeds * 100 / $beds) : 0;

            $data[] = [
                'department' => $department->name_short,
                'beds' => $beds,
                'all' => $allCount,
                'plan' => '0',
                'emergency' => '0',
                'leave' => $leaveCount,
                'consist' => $consistCount,
                'percentLoadedBeds' => $percentLoadedBeds,
            ];
        }

        return Inertia::render('Statistic/Index', [
            'data' => $data
        ]);
    }

    public function indexOld(Request $request)
    {
        $user = Auth::user();

        $validator = Validator::make($request->all(), [
            'sent_at' => 'required|string'
        ]);

        $groupId = (int)$request->query('groupId');

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'errors' => $validator->errors()
            ], 422);
        }

        $timestamps = explode(',', $request->sent_at);
        $startAt = intval($timestamps[0] / 1000);
        $endAt = intval($timestamps[1] / 1000);

        // Проверяем период (максимум 1 год)
        $daysDiff = ($endAt - $startAt) / (60 * 60 * 24);
        if ($daysDiff > 365) {
            return response()->json([
                'success' => false,
                'message' => 'Период не может превышать 1 год'
            ], 400);
        }

        $dateStart = date('Y-m-d', $startAt);
        $dateEnd = date('Y-m-d', $endAt);

        $group = MetrikaGroup::findOrFail($groupId);

        // Оптимизированный агрегированный запрос
        $aggregatedData = DB::table('metrika_results as mr')
            ->join('metrika_result_values as mv', 'mr.metrika_result_id', '=', 'mv.rf_metrika_result_id')
            ->join('reports as r', 'mr.rf_report_id', '=', 'r.report_id')
            ->where('mr.rf_metrika_group_id', $groupId)
            ->whereBetween('r.sent_at', [$dateStart, $dateEnd])
            ->when(!$user->isAdmin() && !$user->isHeadOfDepartment(), function ($query) use ($user) {
                return $query->where('r.rf_user_id', $user->id);
            })
            ->select([
                'mv.rf_metrika_item_id',
                DB::raw('SUM(CAST(mv.value AS DECIMAL(10,2))) as total_sum'),
                DB::raw('COUNT(DISTINCT r.report_id) as reports_count'),
                DB::raw('AVG(CAST(mv.value AS DECIMAL(10,2))) as avg_value')
            ])
            ->groupBy('mv.rf_metrika_item_id')
            ->get()
            ->keyBy('rf_metrika_item_id');

        if ($aggregatedData->isEmpty()) {
            return response()->json([
                'success' => false,
                'message' => 'Данные за указанный период не найдены'
            ], 404);
        }

        // Получаем названия метрик одним запросом
        $itemIds = $aggregatedData->pluck('rf_metrika_item_id')->toArray();
        $items = MetrikaItem::whereIn('metrika_item_id', $itemIds)
            ->pluck('name', 'metrika_item_id');

        // Формируем ответ
        $formValues = [];
        foreach ($aggregatedData as $itemId => $data) {
            $formValues["metrika_item_{$itemId}"] = [
                'sum' => (float) $data->total_sum,
                'average' => (float) $data->avg_value,
                'reports_count' => $data->reports_count,
                'item_name' => $items[$itemId] ?? 'Неизвестный показатель'
            ];
        }

        // Получаем структуру формы
        $formData = MetrikaForm::getFormData($groupId);

        return Inertia::render('Statistic/Index', [
            'is_view_only' => true,
            'period' => [
                'start' => $dateStart,
                'end' => $dateEnd,
                'days' => $daysDiff + 1
            ],
            'group' => [
                'id' => $group->metrika_group_id,
                'name' => $group->name,
                'description' => $group->description,
            ],
            'metrics' => [
                'total_items' => count($formValues),
                'total_reports' => $aggregatedData->first()->reports_count ?? 0,
                'values' => $formValues,
                'aggregation' => 'sum_and_average'
            ],
            'form' => [
                'fields' => $formData,
                'sections' => $this->groupFieldsBySection($formData)
            ]
        ]);
    }

    private function groupFieldsBySection($fields)
    {
        $sections = [];

        foreach ($fields as $field) {
            $section = $field['section'] ?? 'general';

            if (!isset($sections[$section])) {
                $sections[$section] = [
                    'name' => $this->getSectionName($section),
                    'fields' => []
                ];
            }

            $sections[$section]['fields'][] = $field;
        }

        return array_values($sections);
    }

    private function getSectionName($section)
    {
        $names = [
            'general' => 'Основные показатели',
            'admissions' => 'Поступления',
            'discharges' => 'Выписки',
            'additional' => 'Дополнительная информация'
        ];

        return $names[$section] ?? ucfirst($section);
    }
}