<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\FloorLayout;
use Illuminate\Support\Facades\Auth;

class FloorLayoutController extends Controller
{

    public function index()
    {
        $layouts = FloorLayout::all();
        return response()->json(['layouts' => $layouts]);
    }
    /**
     * GET /api/floor-layouts/{layoutName}
     *   Returns:
     *     - data.rooms  (array of room objects)
     *     - data.bgFile (data-uri string or null)
     */
    public function show(string $room_id)
    {
        $layout = FloorLayout::with(['room'])->where(
            ['room_id' => $room_id]
        )->first();

        $bgFile = null;
        if ($layout->layout_bg_file) {
            $mime    = 'image/png'; // adjust if you store SVG/jpeg
            $encoded = $layout->layout_bg_file;
            $bgFile  = "data:{$mime};base64,{$encoded}";
        }

        return response()->json([
            'room'  => $layout->room,
            'layoutItems'  => $layout->data,
            'bgFile' => $bgFile,
        ]);
    }

    /**
     * POST /api/floor-layouts/{layoutName}
     * Accepts multipart/form-data with:
     *   - rooms   : JSON array
     *   - bg_file : optional image file
     */
    public function update(Request $request)
    {
        // Validate rooms array, and optionally a Base64 image string
        $validated = $request->validate([
            'contents'  => 'required|array',
            'room_id' => 'required|integer',
        ]);

        // Lookup (or new) by the unique layout_name
        $layout = FloorLayout::where(['room_id' => $validated['room_id']])->first();


        // Save room JSON, track user, persist
        $layout->data    = $validated['contents'];
        $layout->user_id = Auth::id();
        $layout->save();  // will INSERT or UPDATE, with your unique key on layout_name

        return response()->json([
            'success'    => true,
            'updated_at' => $layout->updated_at->toIso8601String(),
        ]);
    }

    public function create(Request $request)
    {
        // Validate that we got a layout name, and optionally a Base64‐encoded image
        $validated = $request->validate([
            'room_id'   => 'required|integer',
            'name'   => 'required|string|max:100',
            'bgFile' => 'nullable|string',  // still expect a Data-URL / Base64 string
        ]);

        // Use the submitted name as the unique layout_name
        $layout     = FloorLayout::firstOrNew(['layout_name' => $validated['name'], 'room_id' => $validated['room_id']]);

        // If they sent us a Data-URL, strip the prefix and store *that* Base64
        if (!empty($validated['bgFile'])) {
            if (preg_match('#^data:image/\w+;base64,#i', $validated['bgFile'])) {
                // keep only the Base64 payload
                $base64 = substr($validated['bgFile'], strpos($validated['bgFile'], ',') + 1);
                $layout->layout_bg_file = $base64;
            } else {
                return response()->json([
                    'success' => false,
                    'message' => 'bgFile must be a Base64 data URL',
                ], 422);
            }
        }

        // Initialize with empty rooms array (you’ll add rooms via the save‐layout endpoint later)
        $layout->data    = [];
        $layout->user_id = Auth::id();
        $layout->save();  // INSERT or UPDATE

        // Return the layout_name so the front end can add it into tabs & select it
        return response()->json([
            'success'    => true,
            'layout'       => $layout->layout_name,
            'created_at' => $layout->created_at->toIso8601String(),
        ]);
    }
}