<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Result;
use App\Imports\ResultsImport;
use Maatwebsite\Excel\Facades\Excel;

class AdminResultsController extends Controller
{
    public function index(Request $request)
    {
        $query = Result::query();

        // 1. Student Log ID, Module Code, හෝ Module Name මගින් Search කිරීම
        if ($request->filled('search')) {
            $search = $request->search;
            $query->where(function ($q) use ($search) {
                $q->where('student_log_id', 'like', "%{$search}%")
                  ->orWhere('module_code', 'like', "%{$search}%")
                  ->orWhere('module_name', 'like', "%{$search}%");
            });
        }

        // 2. Academic Year මගින් Filter කිරීම
        if ($request->filled('academic_year')) {
            $query->where('academic_year', 'like', "%{$request->academic_year}%");
        }

        // 3. Pass/Fail Status මගින් Filter කිරීම
        if ($request->filled('status')) {
            $query->where('status', $request->status);
        }

        // Filter වූ Data Pagination (පිටුවකට 15 බැගින්) සමග ලබා ගැනීම
        // (Pagination අවශ්‍ය නැතිනම් ->paginate(15) වෙනුවට ->get() භාවිතා කරන්න)
        $results = $query->orderBy('id', 'desc')->paginate(15)->withQueryString();

        return view('admin.adminresults', compact('results'));
    }

    public function store(Request $request)
    {
        $validated = $request->validate([
            'student_log_id' => 'required|string|max:255',
            'module_code'    => 'required|string|max:255',
            'module_name'    => 'required|string|max:255',
            'academic_year'  => 'required|string|max:255',
            'semester'       => 'required|string|max:255',
            'marks'          => 'required|numeric|min:0|max:100',
            'grade'          => 'required|string|max:10',
            'status'         => 'required|in:Pass,Fail',
        ]);

        Result::create($validated);

        return redirect()->route('admin.results')->with('success', 'Exam result added successfully.');
    }

    public function update(Request $request, $id)
    {
        $validated = $request->validate([
            'student_log_id' => 'required|string|max:255',
            'module_code'    => 'required|string|max:255',
            'module_name'    => 'required|string|max:255',
            'academic_year'  => 'required|string|max:255',
            'semester'       => 'required|string|max:255',
            'marks'          => 'required|numeric|min:0|max:100',
            'grade'          => 'required|string|max:10',
            'status'         => 'required|in:Pass,Fail',
        ]);

        $result = Result::findOrFail($id);
        $result->update($validated);

        return redirect()->route('admin.results')->with('success', 'Exam result updated successfully.');
    }

    public function destroy($id)
    {
        $result = Result::findOrFail($id);
        $result->delete();

        return redirect()->route('admin.results')->with('success', 'Exam result deleted successfully.');
    }

    public function import(Request $request)
    {
        $request->validate([
            'excel_file' => 'required|mimes:xlsx,xls,csv|max:2048'
        ]);

        // Excel file එක Import කිරීම
        Excel::import(new ResultsImport, $request->file('excel_file'));

        // Upload වූ පසු කෙලින්ම Admin Results Table එකට Redirect කිරීම
        return redirect()->route('admin.results')->with('success', 'Excel file imported successfully!');
    }
}