<?php

namespace App\Http\Controllers\Juil;

use App\Http\Controllers\Controller;
use App\Models\Juil\PmisManual;
use App\Models\Juil\PmisManualAttachment;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

class PmisManualController extends Controller
{
    private function tenantId(): int
    {
        return (int) session('current_tenant_id', 1);
    }

    public function list(Request $request): JsonResponse
    {
        $search = $request->query('search', '');

        $query = PmisManual::tenant($this->tenantId())
            ->with('author:id,name')
            ->withCount('attachments')
            ->orderByDesc('id');

        if ($search) {
            $query->where(function ($q) use ($search) {
                $q->where('title', 'like', "%{$search}%")
                    ->orWhere('tags', 'like', "%{$search}%");
            });
        }

        $manuals = $query->get()->map(fn ($m) => [
            'id' => $m->id,
            'title' => $m->title,
            'author' => $m->author?->name ?? '관리자',
            'createdAt' => $m->created_at->format('Y-m-d'),
            'views' => $m->views,
            'hasAttachment' => $m->attachments_count > 0,
        ]);

        return response()->json(['manuals' => $manuals]);
    }

    public function show(int $id): JsonResponse
    {
        $manual = PmisManual::tenant($this->tenantId())
            ->with(['author:id,name', 'attachments'])
            ->findOrFail($id);

        $manual->increment('views');

        return response()->json([
            'manual' => [
                'id' => $manual->id,
                'title' => $manual->title,
                'content' => $manual->content,
                'tags' => $manual->tags,
                'author' => $manual->author?->name ?? '관리자',
                'createdAt' => $manual->created_at->format('Y-m-d'),
                'views' => $manual->views,
                'attachments' => $manual->attachments->map(fn ($a) => [
                    'id' => $a->id,
                    'fileName' => $a->original_name,
                    'size' => PmisManualAttachment::formatSize($a->file_size),
                    'downloadUrl' => "/juil/construction-pmis/api/manuals/attachments/{$a->id}/download",
                ]),
            ],
        ]);
    }

    public function store(Request $request): JsonResponse
    {
        $user = auth()->user();
        if (! $user->isAdmin()) {
            return response()->json(['message' => '권한이 없습니다.'], 403);
        }

        $request->validate([
            'title' => 'required|string|max:300',
            'content' => 'nullable|string',
            'tags' => 'nullable|string|max:500',
            'files' => 'nullable|array',
            'files.*' => 'file|max:51200',
        ]);

        $manual = PmisManual::create([
            'tenant_id' => $this->tenantId(),
            'title' => $request->title,
            'content' => $request->content ?? '',
            'tags' => $request->tags ?? '',
            'author_id' => $user->id,
        ]);

        if ($request->hasFile('files')) {
            foreach ($request->file('files') as $file) {
                $path = $file->store('pmis/manuals', 'public');
                $manual->attachments()->create([
                    'original_name' => $file->getClientOriginalName(),
                    'file_path' => $path,
                    'file_size' => $file->getSize(),
                ]);
            }
        }

        return response()->json(['manual' => $manual->load('attachments'), 'message' => '등록되었습니다.'], 201);
    }

    public function update(Request $request, int $id): JsonResponse
    {
        $user = auth()->user();
        if (! $user->isAdmin()) {
            return response()->json(['message' => '권한이 없습니다.'], 403);
        }

        $manual = PmisManual::tenant($this->tenantId())->findOrFail($id);

        $request->validate([
            'title' => 'required|string|max:300',
            'content' => 'nullable|string',
            'tags' => 'nullable|string|max:500',
            'files' => 'nullable|array',
            'files.*' => 'file|max:51200',
        ]);

        $manual->update([
            'title' => $request->title,
            'content' => $request->content ?? '',
            'tags' => $request->tags ?? '',
        ]);

        if ($request->hasFile('files')) {
            foreach ($request->file('files') as $file) {
                $path = $file->store('pmis/manuals', 'public');
                $manual->attachments()->create([
                    'original_name' => $file->getClientOriginalName(),
                    'file_path' => $path,
                    'file_size' => $file->getSize(),
                ]);
            }
        }

        return response()->json(['manual' => $manual->load('attachments'), 'message' => '수정되었습니다.']);
    }

    public function destroy(int $id): JsonResponse
    {
        $user = auth()->user();
        if (! $user->isAdmin()) {
            return response()->json(['message' => '권한이 없습니다.'], 403);
        }

        $manual = PmisManual::tenant($this->tenantId())->findOrFail($id);

        foreach ($manual->attachments as $att) {
            Storage::disk('public')->delete($att->file_path);
        }

        $manual->delete();

        return response()->json(['message' => '삭제되었습니다.']);
    }

    public function attachmentDownload(int $id)
    {
        $att = PmisManualAttachment::findOrFail($id);
        $fullPath = Storage::disk('public')->path($att->file_path);

        return response()->download($fullPath, $att->original_name);
    }

    public function attachmentDestroy(int $id): JsonResponse
    {
        $user = auth()->user();
        if (! $user->isAdmin()) {
            return response()->json(['message' => '권한이 없습니다.'], 403);
        }

        $att = PmisManualAttachment::findOrFail($id);
        Storage::disk('public')->delete($att->file_path);
        $att->delete();

        return response()->json(['message' => '삭제되었습니다.']);
    }
}