using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class ScrollViewScript : MonoBehaviour, IDropHandler {
    public GameObject prefab;
    public Transform contentPanel;
    private bool placeQuestion;
    NewQuestion nq;
    private int newQuestionSiblingIndex;

    // Start is called before the first frame update
    void Start() {
        SetGiventQuestion();
    }

    public void SetGiventQuestion() {
        // if new game, create one question card to start with
        GameObject question = Instantiate(prefab, new Vector2(0, 0), Quaternion.identity) as GameObject;
        QuestionCard questionCard = question.GetComponent<QuestionCard>();
        questionCard.PrepareQuestion("QuestionText", "AnswerText");
        questionCard.GetQuestion(true);
        questionCard.SetQuestionSafe();

        questionCard.transform.SetSiblingIndex(0);
        questionCard.transform.SetParent(contentPanel);
    }

    public void OnDrop(PointerEventData eventData) {
        Draggable d = eventData.pointerDrag.GetComponent<Draggable>();
        if (d == null || !d.gameObject.name.Contains("NewQuestion")) {
            return;
        }
        // Popup modal asking are you sure here or at onDragEnd?
        nq = d.GetComponent<NewQuestion>();
        newQuestionSiblingIndex = d.placeholder.transform.GetSiblingIndex();

        ModalPanel modalPanel = ModalPanel.Instance();
        ModalPanelDetails modalDetails = new ModalPanelDetails { question = "Vill du svara att " + nq.GetQuestionText().text + " hände " + nq.GetAnswerText().text + "?", iconImage = null };
        modalDetails.button1Details = new EventButtonDetails { buttonTitle = "Ja", action = YesFunction };
        modalDetails.button2Details = new EventButtonDetails { buttonTitle = "Nej", action = NoFunction };
        modalPanel.NewChoice(modalDetails);
    }

    // kontrollera om man svarat korrekt, om det är korrekt, visa ny modal med vill du ha ny fråga? om fel, meddela det och avsluta omgång.
    void YesFunction() {
        int correctAnswer = Int32.Parse(nq.answerString);
        Transform questionBefore = null;
        Transform questionAfter = null;
        try {
            questionBefore = contentPanel.GetChild(newQuestionSiblingIndex -1 );
        } catch (UnityException e) { }
        try {
            questionAfter = contentPanel.GetChild(newQuestionSiblingIndex );
        } catch (UnityException e) { }

        QuestionCard test = contentPanel.GetChild(0).GetComponent<QuestionCard>();
        int answerBefore = -1;
        int answerAfter = 999999;
        if (questionBefore != null) {
            answerBefore = Int16.Parse(questionBefore.GetComponent<QuestionCard>().GetAnswerText().text);
        }
        if (questionAfter != null) {
            answerAfter = Int16.Parse(questionAfter.GetComponent<QuestionCard>().GetAnswerText().text);
        }
        if (answerBefore <= correctAnswer && answerAfter >= correctAnswer) { // korrect svar, spara frågan i tidslinjen och prompta ny modal för "Vill du ha en fråga till?" med meddelande om vad som står på spel (olåsta frågor)

            GameObject question = Instantiate(prefab, new Vector2(0, 0), Quaternion.identity) as GameObject;
            QuestionCard questionCard = question.GetComponent<QuestionCard>();

            questionCard.SetAnswerText(nq.answerString);
            questionCard.SetQuestionText(nq.questionString);
            questionCard.questionString = nq.questionString;
            questionCard.answerString = nq.answerString;
            questionCard.categoryString = nq.categoryString;
            questionCard.idString = nq.idString;

            questionCard.transform.SetParent(contentPanel);
            questionCard.transform.SetSiblingIndex(newQuestionSiblingIndex);
        } else { // Visa modal för fel svar och meddela att man svarat fel och förlorat x olåsta frågor.

        }
    }

    void NoFunction() {
    }
}