<?php

namespace App\Http\Controllers;

use App\Models\disease;
use App\Models\rule;
use App\Models\symptom;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class RuleController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $rules = Rule::join('diseases', 'rules.disease_id', '=', 'diseases.id')
                    ->join('symptoms', 'rules.symptom_id', '=', 'symptoms.id')
                    ->select('rules.code', 'symptoms.code as codes' , 'diseases.name as disease_name', 'symptoms.name as symptom_name')
                    ->get();

        $rules2 = Symptom::all();
        $diseases = Disease::all();

        $rulesByDisease = [];
        foreach ($diseases as $disease) {
            $rulesByDisease[$disease->id] = Rule::where('disease_id', $disease->id)->pluck('symptom_id')->toArray();
        }

        return view('admin.rule.rule', compact('rules', 'rules2', 'diseases', 'rulesByDisease'));
    }


    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create(Request $request)
    {

    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        $data = $request->validate([
            'rules' => 'required|array',
            'rules.*.code' => 'required|string',
            'rules.*.disease_id' => 'required|integer',
            'rules.*.symptom_id' => 'required|integer',
        ]);

        $errors = [];
        foreach ($data['rules'] as $ruleData) {
            $ruleData['code'] = str_replace('G', 'R', $ruleData['code']);

            $existingRule = Rule::where('disease_id', $ruleData['disease_id'])
                                ->where('symptom_id', $ruleData['symptom_id'])
                                ->first();

            if ($existingRule) {
                $errors[] = "The symptom_id {$ruleData['symptom_id']} already exists for disease_id {$ruleData['disease_id']}.";
                continue;
            }

            $rule = new Rule();
            $rule->code = $ruleData['code'];
            $rule->disease_id = $ruleData['disease_id'];
            $rule->symptom_id = $ruleData['symptom_id'];
            $rule->save();
        }

        if (count($errors) > 0) {
            return response()->json(['success' => false, 'message' => 'Rules gagal disimpan.', 'errors' => $errors]);
        } else {
            return response()->json(['success' => true, 'message' => 'Rules berhasil disimpan.']);
        }
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function deleteUnchecked(Request $request)
    {
        $uncheckedSymptoms = $request->input('unchecked_symptoms');

        try {
            foreach ($uncheckedSymptoms as $symptom) {
                Rule::where('disease_id', $symptom['disease_id'])
                    ->where('symptom_id', $symptom['symptom_id'])
                    ->delete();
            }

            return response()->json(['message' => 'Unchecked symptoms data successfully deleted'], 200);
        } catch (\Exception $e) {
            return response()->json(['error' => $e->getMessage()], 500);
        }
    }
}