<?php

namespace App\Services\Equipment;

use App\Enums\InspectionCycle;
use App\Models\Equipment\Equipment;
use App\Models\Equipment\EquipmentInspection;
use App\Models\Equipment\EquipmentInspectionDetail;
use App\Models\Equipment\EquipmentInspectionTemplate;
use App\Services\Service;
use Illuminate\Support\Facades\DB;
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class EquipmentInspectionService extends Service
{
    public function getInspections(string $cycle, string $period, ?string $productionLine = null, ?int $equipmentId = null): array
    {
        $equipmentQuery = Equipment::active()
            ->where('status', '!=', 'disposed')
            ->with(['manager', 'subManager']);

        if ($productionLine) {
            $equipmentQuery->byLine($productionLine);
        }

        if ($equipmentId) {
            $equipmentQuery->where('id', $equipmentId);
        }

        $equipments = $equipmentQuery->orderBy('sort_order')->orderBy('name')->get();

        $labels = InspectionCycle::columnLabels($cycle, $period);
        $userId = $this->apiUserId();

        $result = [];

        foreach ($equipments as $equipment) {
            $templates = EquipmentInspectionTemplate::where('equipment_id', $equipment->id)
                ->byCycle($cycle)
                ->active()
                ->orderBy('sort_order')
                ->get();

            if ($templates->isEmpty()) {
                continue;
            }

            $inspection = EquipmentInspection::where('equipment_id', $equipment->id)
                ->where('inspection_cycle', $cycle)
                ->where('year_month', $period)
                ->first();

            $details = [];
            if ($inspection) {
                $details = EquipmentInspectionDetail::where('inspection_id', $inspection->id)
                    ->get()
                    ->groupBy(function ($d) {
                        return $d->template_item_id.'_'.$d->check_date->format('Y-m-d');
                    });
            }

            $result[] = [
                'equipment' => $equipment,
                'templates' => $templates,
                'inspection' => $inspection,
                'details' => $details,
                'labels' => $labels,
                'can_inspect' => $equipment->canInspect($userId),
            ];
        }

        return $result;
    }

    public function toggleDetail(int $equipmentId, int $templateItemId, string $checkDate, string $cycle = 'daily'): array
    {
        return DB::transaction(function () use ($equipmentId, $templateItemId, $checkDate, $cycle) {
            $equipment = Equipment::find($equipmentId);
            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            $userId = $this->apiUserId();
            if (! $equipment->canInspect($userId)) {
                throw new AccessDeniedHttpException(__('error.equipment.no_inspect_permission'));
            }

            $period = InspectionCycle::resolvePeriod($cycle, $checkDate);
            if ($cycle === InspectionCycle::DAILY) {
                $tenantId = $this->tenantId();
                $holidayDates = InspectionCycle::getHolidayDates($cycle, $period, $tenantId);
                if (InspectionCycle::isNonWorkingDay($checkDate, $holidayDates)) {
                    throw new BadRequestHttpException(__('error.equipment.non_working_day'));
                }
            }

            $tenantId = $this->tenantId();

            $inspection = EquipmentInspection::firstOrCreate(
                [
                    'tenant_id' => $tenantId,
                    'equipment_id' => $equipmentId,
                    'inspection_cycle' => $cycle,
                    'year_month' => $period,
                ],
                [
                    'created_by' => $userId,
                ]
            );

            $detail = EquipmentInspectionDetail::where('inspection_id', $inspection->id)
                ->where('template_item_id', $templateItemId)
                ->where('check_date', $checkDate)
                ->first();

            if ($detail) {
                $nextResult = EquipmentInspectionDetail::getNextResult($detail->result);
                if ($nextResult === null) {
                    $detail->delete();

                    return ['result' => null, 'symbol' => ''];
                }
                $detail->update(['result' => $nextResult]);
            } else {
                $detail = EquipmentInspectionDetail::create([
                    'inspection_id' => $inspection->id,
                    'template_item_id' => $templateItemId,
                    'check_date' => $checkDate,
                    'result' => 'good',
                ]);
                $nextResult = 'good';
            }

            return [
                'result' => $nextResult,
                'symbol' => EquipmentInspectionDetail::getResultSymbol($nextResult),
            ];
        });
    }

    public function setResult(int $equipmentId, int $templateItemId, string $checkDate, string $cycle, ?string $result): array
    {
        return DB::transaction(function () use ($equipmentId, $templateItemId, $checkDate, $cycle, $result) {
            $equipment = Equipment::find($equipmentId);
            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            $userId = $this->apiUserId();
            if (! $equipment->canInspect($userId)) {
                throw new AccessDeniedHttpException(__('error.equipment.no_inspect_permission'));
            }

            $period = InspectionCycle::resolvePeriod($cycle, $checkDate);
            if ($cycle === InspectionCycle::DAILY) {
                $tenantId = $this->tenantId();
                $holidayDates = InspectionCycle::getHolidayDates($cycle, $period, $tenantId);
                if (InspectionCycle::isNonWorkingDay($checkDate, $holidayDates)) {
                    throw new BadRequestHttpException(__('error.equipment.non_working_day'));
                }
            }

            $tenantId = $this->tenantId();

            $inspection = EquipmentInspection::firstOrCreate(
                [
                    'tenant_id' => $tenantId,
                    'equipment_id' => $equipmentId,
                    'inspection_cycle' => $cycle,
                    'year_month' => $period,
                ],
                [
                    'created_by' => $userId,
                ]
            );

            $detail = EquipmentInspectionDetail::where('inspection_id', $inspection->id)
                ->where('template_item_id', $templateItemId)
                ->where('check_date', $checkDate)
                ->first();

            if ($result === null) {
                if ($detail) {
                    $detail->delete();
                }

                return ['result' => null, 'symbol' => ''];
            }

            if ($detail) {
                $detail->update(['result' => $result]);
            } else {
                $detail = EquipmentInspectionDetail::create([
                    'inspection_id' => $inspection->id,
                    'template_item_id' => $templateItemId,
                    'check_date' => $checkDate,
                    'result' => $result,
                ]);
            }

            return [
                'result' => $result,
                'symbol' => EquipmentInspectionDetail::getResultSymbol($result),
            ];
        });
    }

    public function updateNotes(int $equipmentId, string $yearMonth, array $data, string $cycle = 'daily'): EquipmentInspection
    {
        return DB::transaction(function () use ($equipmentId, $yearMonth, $data, $cycle) {
            $tenantId = $this->tenantId();
            $userId = $this->apiUserId();

            $inspection = EquipmentInspection::firstOrCreate(
                [
                    'tenant_id' => $tenantId,
                    'equipment_id' => $equipmentId,
                    'inspection_cycle' => $cycle,
                    'year_month' => $yearMonth,
                ],
                [
                    'created_by' => $userId,
                ]
            );

            $inspection->update($data);

            return $inspection->fresh();
        });
    }

    public function resetInspection(int $equipmentId, string $cycle, string $period): int
    {
        return DB::transaction(function () use ($equipmentId, $cycle, $period) {
            $equipment = Equipment::find($equipmentId);
            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            $userId = $this->apiUserId();
            if (! $equipment->canInspect($userId)) {
                throw new AccessDeniedHttpException(__('error.equipment.no_inspect_permission'));
            }

            $tenantId = $this->tenantId();

            $inspection = EquipmentInspection::where('tenant_id', $tenantId)
                ->where('equipment_id', $equipmentId)
                ->where('inspection_cycle', $cycle)
                ->where('year_month', $period)
                ->first();

            if (! $inspection) {
                return 0;
            }

            $deleted = EquipmentInspectionDetail::where('inspection_id', $inspection->id)->delete();
            $inspection->update([
                'overall_judgment' => null,
                'repair_note' => null,
                'issue_note' => null,
                'inspector_id' => null,
            ]);

            return $deleted;
        });
    }

    public function saveTemplate(int $equipmentId, array $data): EquipmentInspectionTemplate
    {
        return DB::transaction(function () use ($equipmentId, $data) {
            $tenantId = $this->tenantId();

            return EquipmentInspectionTemplate::create(array_merge($data, [
                'tenant_id' => $tenantId,
                'equipment_id' => $equipmentId,
            ]));
        });
    }

    public function updateTemplate(int $id, array $data): EquipmentInspectionTemplate
    {
        return DB::transaction(function () use ($id, $data) {
            $template = EquipmentInspectionTemplate::find($id);

            if (! $template) {
                throw new NotFoundHttpException(__('error.equipment.template_not_found'));
            }

            $template->update($data);

            return $template->fresh();
        });
    }

    public function deleteTemplate(int $id): bool
    {
        return DB::transaction(function () use ($id) {
            $template = EquipmentInspectionTemplate::find($id);

            if (! $template) {
                throw new NotFoundHttpException(__('error.equipment.template_not_found'));
            }

            return $template->delete();
        });
    }

    public function copyTemplates(int $equipmentId, string $sourceCycle, array $targetCycles): array
    {
        return DB::transaction(function () use ($equipmentId, $sourceCycle, $targetCycles) {
            $tenantId = $this->tenantId();

            $sourceTemplates = EquipmentInspectionTemplate::where('equipment_id', $equipmentId)
                ->byCycle($sourceCycle)
                ->active()
                ->orderBy('sort_order')
                ->get();

            if ($sourceTemplates->isEmpty()) {
                throw new BadRequestHttpException(__('error.equipment.no_source_templates'));
            }

            $copiedCount = 0;
            $skippedCount = 0;

            foreach ($targetCycles as $targetCycle) {
                foreach ($sourceTemplates as $template) {
                    $exists = EquipmentInspectionTemplate::where('equipment_id', $equipmentId)
                        ->where('inspection_cycle', $targetCycle)
                        ->where('item_no', $template->item_no)
                        ->exists();

                    if ($exists) {
                        $skippedCount++;

                        continue;
                    }

                    EquipmentInspectionTemplate::create([
                        'tenant_id' => $tenantId,
                        'equipment_id' => $equipmentId,
                        'inspection_cycle' => $targetCycle,
                        'item_no' => $template->item_no,
                        'check_point' => $template->check_point,
                        'check_item' => $template->check_item,
                        'check_timing' => $template->check_timing,
                        'check_frequency' => $template->check_frequency,
                        'check_method' => $template->check_method,
                        'sort_order' => $template->sort_order,
                        'is_active' => true,
                    ]);
                    $copiedCount++;
                }
            }

            return [
                'copied' => $copiedCount,
                'skipped' => $skippedCount,
                'source_count' => $sourceTemplates->count(),
                'target_cycles' => $targetCycles,
            ];
        });
    }

    public function getTemplatesByEquipment(int $equipmentId, ?string $cycle = null): \Illuminate\Database\Eloquent\Collection
    {
        return EquipmentInspectionTemplate::where('equipment_id', $equipmentId)
            ->when($cycle, fn ($q) => $q->byCycle($cycle))
            ->active()
            ->orderBy('sort_order')
            ->get();
    }

    public function getActiveCycles(int $equipmentId): array
    {
        return EquipmentInspectionTemplate::where('equipment_id', $equipmentId)
            ->active()
            ->distinct()
            ->pluck('inspection_cycle')
            ->toArray();
    }
}