<?php

namespace App\Http\Controllers;

use App\Models\Banner;
use App\Models\Category;
use App\Models\Course;
use App\Models\Transaction;
use App\Models\User;
use App\Traits\ApiResponseHelper;
use App\Traits\ImageHelper;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class CourseController extends Controller
{
    use ApiResponseHelper, ImageHelper;


    public function create(User $user)
    {

        $pageConfigs = [
            'pageHeader' => true,
            'showMenu' => true
        ];

        $breadcrumbs = [['link' => '/admin/students/'.$user->id.'/edit', 'name' => 'Courses'], ['name' => 'Add']];
        $categories = Category::all();
        if ($categories->count() == 0){
            return redirect()->back()->with(['error'=>'Please add a course category first.']);
        }

        return view('content.users.courses.create', [
            'pageConfigs' => $pageConfigs,
            'breadcrumbs' => $breadcrumbs,
            'categories' => $categories,
            'user' => $user
        ]);
    }

    public function store(Request $request)
    {
        $request->validate([
            'student_id' => ['required'],
            'category' => ['required'],
            'fee' => ['required'],
            'start_date' => ['required'],
            'end_date' => ['required'],
            'note' => ['nullable'],
        ]);

        try {
            DB::beginTransaction();
            $course = new Course();
            $course->student_id = $request->student_id;
            $course->category_id = $request->category;
            $course->total_fee = $request->fee;
            $course->start_date = $request->start_date;
            $course->end_date = $request->end_date;
            $course->notes = $request->note;
            $course->save();
            DB::commit();
            return redirect()->route('students.edit', $request->student_id)->with([
                'success' => "Course created successfully"
            ]);
        } catch (\Throwable $exception) {
            DB::rollBack();
            return redirect()->back()->with([
                'error' => $exception->getMessage()
            ]);
        }
    }

    public function edit(Course $course)
    {

        $pageConfigs = [
            'pageHeader' => true,
            'showMenu' => true
        ];

        $breadcrumbs = [['link' =>'/admin/students/'.$course->student_id.'/edit', 'name' => 'Courses'], ['name' => 'Edit']];
        $categories = Category::all();
        $transactions = Transaction::where('course_id',$course->id)->get();
        return view('content.users.courses.edit', [
            'pageConfigs' => $pageConfigs,
            'breadcrumbs' => $breadcrumbs,
            'course' => $course,
            'categories' => $categories,
            'transactions'=>$transactions
        ]);
    }

    public function update(Request $request, Course $course)
    {
        $request->validate([
            'category' => ['required'],
            'fee' => ['required'],
            'start_date' => ['required'],
            'end_date' => ['required'],
            'certificate_issued_at' => ['nullable'],
            'note' => ['nullable'],
        ]);
        try {
            DB::beginTransaction();

            $course->category_id = $request->category;
            $course->total_fee = $request->fee;
            $course->start_date = $request->start_date;
            $course->end_date = $request->end_date;
            $course->certificate_issued_at = $request->certificate_issued_at;
            $course->notes = $request->note;
            $course->update();
            DB::commit();
            return redirect()->back()->with([
                'success' => "Course updated successfully"
            ]);
        } catch (\Throwable $exception) {
            DB::rollBack();
            return redirect()->back()->with([
                'error' => $exception->getMessage()
            ]);
        }
    }

    public function destroy(Course $course)
    {

        try {
            DB::beginTransaction();
            if ($course->allTransactions->count() > 0){
               foreach ($course->allTransactions as $transaction){
                   $transaction->delete();
               }
            }
            $course->delete();
            DB::commit();
            return redirect()->back()->with([
                'success' => "Course deleted successfully"
            ]);
        } catch (\Throwable $exception) {
            DB::rollBack();
            return redirect()->back()->with([
                'error' => $exception->getMessage()
            ]);
        }
    }

}