<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Image;
use App\Models\Classification; 
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Http;

class ImageController extends Controller
{
    public function create()
    {
        return view('klasifikasi.klasifikasi');
    }

    public function store(Request $request)
    {
        $request->validate([
            'image' => 'required|image|mimes:jpg,jpeg,png|max:2048'
        ], [
            'image.required' => 'Gambar insang ikan wajib diunggah.',
            'image.image'    => 'File harus berupa gambar.',
            'image.mimes'    => 'Format yang diizinkan hanya JPG, JPEG, atau PNG.',
            'image.max'      => 'Ukuran gambar maksimal 2MB.'
        ]);

        // ======================================
        // HAPUS FOTO LAMA — hanya untuk guest
        // ======================================
        if (!Auth::check()) {
            $fotoGuest = Image::whereNull('user_id')->get();
            foreach ($fotoGuest as $fotoLama) {
                \Storage::delete('public/' . $fotoLama->image_path);
                $fotoLama->delete();
            }
        }

        // Simpan gambar baru
        $imageFile = $request->file('image');
        $path      = $imageFile->store('images', 'public');

        // =============================================
        // Simpan user_id kalau login, null kalau guest
        // =============================================
        $image = Image::create([
            'user_id'    => Auth::id(), // otomatis null kalau belum login
            'image_path' => $path
        ]);

        $image_url = asset('storage/' . $path);

        // ==========================================
        // KONEKSI KE API PYTHON (FLASK)
        // ==========================================
        try {
            $apiUrl = 'http://127.0.0.1:5000/predict';

            $response = Http::timeout(60)->attach(
                'image',
                file_get_contents($imageFile->getRealPath()),
                $imageFile->getClientOriginalName()
            )->post($apiUrl);

            if ($response->successful()) {

                $result = $response->json();

                // BUKAN INSANG
                if ($result['status'] == 'bukan_insang') {
                    return redirect()->back()->with([
                        'error_insang' => $result['pesan'],
                        'image_url'    => $image_url
                    ]);
                }

                // HASIL NORMAL
                if ($result['status'] == 'ok') {
                    Classification::create([
                        'image_id'          => $image->id,
                        'kelas'             => $result['prediksi_2kelas'],
                        'prob_fresh'        => $result['prob_fresh'],
                        'tingkat_kesegaran' => $result['tingkat_kesegaran']
                    ]);

                    return redirect()->back()->with([
                        'success'           => 'Gambar berhasil dianalisis oleh model AI!',
                        'kelas'             => $result['prediksi_2kelas'],
                        'prob_fresh'        => $result['prob_fresh'],
                        'tingkat_kesegaran' => $result['tingkat_kesegaran'],
                        'image_url'         => $image_url,
                        'cropped_image'     => $result['cropped_image'] ?? null
                    ]);
                }

            } else {
                return redirect()->back()->withErrors([
                    'image' => 'Terjadi kesalahan pada API: ' . $response->body()
                ]);
            }

        } catch (\Exception $e) {
            return redirect()->back()->withErrors([
                'image' => 'Gagal terhubung ke server AI (Flask).'
            ]);
        }
    }

    public function history()
    {
        $histories = Image::where('user_id', Auth::id())
                          ->with('classification')
                          ->latest()
                          ->paginate(10);

        return view('history.history', compact('histories'));
    }
}