<?php

class Task implements JsonSerializable
{
    protected string $type; // task type
    protected string $question; // the task title
    protected mixed $player_answer; // answer given by the player
    protected mixed $correct_answer;
    protected float $max_mark; // maximum points that can be collected at this task
    protected bool $is_template; // this task is a template
    protected array $flags; // task flags

    function __construct(string $type, array &$a = null)
    {
        $this->type = $type;
        $this->is_template = $a["is_template"] ?? false;
        $this->max_mark = $a["max_mark"] ?? 1.0;
        $this->question = $a["question"] ?? "";
        $this->flags = $a["flags"] ?? [];
        $this->player_answer = $a["player_answer"] ?? null;
        $this->correct_answer = $a["correct_answer"] ?? null;
    }

    function setQuestion(string $question): void
    {
        $this->question = $question;
    }

    function getQuestion(): string
    {
        return $this->question;
    }

    // save answer
    function saveAnswer(mixed $ans): bool
    {
        $this->player_answer = $ans;
        return true;
    }

    // clear answer
    function clearAnswer(): void
    {
        $this->player_answer = "";
    }

    // set task type
    function setType(string $type): void {
        $this->type = $type;
    }

    // get task type
    function getType(): string
    {
        return $this->type;
    }

    function setMaxMark(float $max_mark): void
    {
        $this->max_mark = $max_mark;
    }

    function getMaxMark(): float
    {
        return $this->max_mark;
    }

    function getMark(): float
    {
        return 1.0;
    }

    function toArray(): array
    {
        $a = [
            "type" => $this->type,
            "question" => $this->question,
            "max_mark" => $this->max_mark,
            "is_template" => $this->is_template,
            "flags" => $this->flags,
            "correct_answer" => $this->correct_answer,
        ];

        if (!$this->isTemplate()) {
            $a["player_answer"] = $this->player_answer;
        }

        return $a;
    }

    function jsonSerialize(): mixed
    {
        return $this->toArray();
    }

    function setTemplate(bool $is_template): void
    {
        $this->is_template = $is_template;
    }

    function isTemplate(): bool
    {
        return $this->is_template;
    }

    function getFlags(): array
    {
        return $this->flags;
    }

    function setFlags(array $flags): void
    {
        $this->flags = $flags;
    }

    function hasFlag(string $flag): bool
    {
        return in_array($flag, $this->flags);
    }

    function getPlayerAnswer(): mixed {
        return $this->player_answer;
    }

//    /* FIXME: ez ugyanaz, mint a saveAnswer() */
//    function setPlayerAnswer(mixed $player_answer): void {
//        $this->player_answer = $player_answer;
//    }

    function setCorrectAnswer(mixed $correct_answer): void
    {
        $this->correct_answer = $correct_answer;
    }

    function getCorrectAnswer(): mixed
    {
        return $this->correct_answer;
    }

    function randomize(): void
    {
        return;
    }
}