<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;

class adminmycoursesController extends Controller
{
    // 1. Courses ලැයිස්තුව පෙන්වීම (Read)
    public function index()
    {
        if (!session()->has('admin_id')) {
            return redirect('/adminlogin')->with('error', 'Please login first!');
        }

        $courses = DB::table('courses')->orderBy('id', 'desc')->get();
        return view('admin.adminmycourses', compact('courses'));
    }

    // 2. අලුත් Course එකක් එකතු කිරීම (Create)
    public function store(Request $request)
    {
        $request->validate([
            'title'       => 'required|string|max:255',
            'course_code' => 'required|string|max:50',
            'image'       => 'nullable|image|mimes:jpeg,png,jpg,gif,webp|max:2048',
            'duration'    => 'required|string',
            'level'       => 'required|string',
            'author'      => 'nullable|string',
            'desc'        => 'nullable|string',
            'status'      => 'required|string',
        ]);

        $imagePath = null;
        if ($request->hasFile('image')) {
            $imagePath = $request->file('image')->store('courses', 'public');
        }

        DB::table('courses')->insert([
            'title'       => $request->title,
            'course_code' => $request->course_code,
            'image'       => $imagePath,
            'duration'    => $request->duration,
            'level'       => $request->level,
            'author'      => $request->author ?? 'Admin',
            'desc'        => $request->desc,
            'student'     => $request->student ?? 0,
            'rating'      => $request->rating ?? 0.0,
            'badge'       => $request->badge,
            'trending'    => $request->has('trending') ? 1 : 0,
            'status'      => $request->status,
            'created_at'  => now(),
            'updated_at'  => now(),
        ]);

        return redirect()->back()->with('success', 'Course added successfully!');
    }

    // 3. Course එක Update කිරීම (Update)
    public function update(Request $request, $id)
    {
        $request->validate([
            'title'       => 'required|string|max:255',
            'course_code' => 'required|string|max:50',
            'image'       => 'nullable|image|mimes:jpeg,png,jpg,gif,webp|max:2048',
            'duration'    => 'required|string',
            'level'       => 'required|string',
            'status'      => 'required|string',
        ]);

        $course = DB::table('courses')->where('id', $id)->first();

        if (!$course) {
            return redirect()->back()->with('error', 'Course not found!');
        }

        $imagePath = $course->image;
        if ($request->hasFile('image')) {
            if ($course->image && Storage::disk('public')->exists($course->image)) {
                Storage::disk('public')->delete($course->image);
            }
            $imagePath = $request->file('image')->store('courses', 'public');
        }

        DB::table('courses')->where('id', $id)->update([
            'title'       => $request->title,
            'course_code' => $request->course_code,
            'image'       => $imagePath,
            'duration'    => $request->duration,
            'level'       => $request->level,
            'author'      => $request->author,
            'desc'        => $request->desc,
            'badge'       => $request->badge,
            'trending'    => $request->has('trending') ? 1 : 0,
            'status'      => $request->status,
            'updated_at'  => now(),
        ]);

        return redirect()->back()->with('success', 'Course updated successfully!');
    }

    // 4. Course එක Delete කිරීම (Delete)
    public function destroy($id)
    {
        $course = DB::table('courses')->where('id', $id)->first();

        if ($course) {
            if ($course->image && Storage::disk('public')->exists($course->image)) {
                Storage::disk('public')->delete($course->image);
            }
            DB::table('courses')->where('id', $id)->delete();
            return redirect()->back()->with('success', 'Course deleted successfully!');
        }

        return redirect()->back()->with('error', 'Course not found!');
    }
}