package com.ninjaws.quiz.controllers;

import java.util.List;
import java.util.Optional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.ninjaws.quiz.entities.Category;
import com.ninjaws.quiz.models.Answers;
import com.ninjaws.quiz.models.QuizSettings;
import com.ninjaws.quiz.models.Session;
import com.ninjaws.quiz.services.DataService;
import com.ninjaws.quiz.services.QuizService;

@RestController
@RequestMapping("/quiz")
public class QuizController {

    @Autowired
    private QuizService quizService;
    @Autowired
    private DataService dataService;


    /**
     * Start a session
     * @param amount The amount of questsions
     * @param category The desired category (or all)
     * @param difficulty The desired difficulty (or all)
     * @param type The desired type (or both)
     * @return The sessionId, or statusCode 5 when the queue is full
     */
    @GetMapping("/questions")
    public String startSession(
            @RequestParam(required = true) Integer amount,
            @RequestParam(required = false) Integer category,
            @RequestParam(required = false) String difficulty,
            @RequestParam(required = false) String type
    ) {
        QuizSettings quizSettings = new QuizSettings(amount, category, difficulty, type);
        Optional<String> result = quizService.createSession(quizSettings);
        if (result.isPresent()) {
            String jsonString = String.format("{\"statusCode\":0,\"sessionId\":\"%s\"}", result.get());
            return jsonString;
        }
        String jsonString = String.format("{\"statusCode\":5}");
        return jsonString;
    }

    /**
     * Checks if the questions have been retrieved
     * @param sessionId The session that holds the questions
     * @return The Session, or nothing if they are not ready yet
     */
    @GetMapping("/status/{sessionId}")
    public Optional<Session> checkStatus(@PathVariable String sessionId) {
        return quizService.checkSession(sessionId);
    }

    /**
     * Receive the chosen answers, calculate the score, and return it
     * @param answers The chosen answers
     * @return The score
     */
    @PostMapping("/score")
    public String checkAnswers(@RequestBody Answers answers) {
        String jsonString = String.format("{\"score\":\"%s\"}", quizService.getScore(answers));
        return jsonString;
    }

    @GetMapping("/categories")
    public List<Category> getCategories(){
        return dataService.getCategories();
    }
}