//-----------------------------------------------------------------------------
// Game_Follower
//
// The game object class for a follower. A follower is an allied character,
// other than the front character, displayed in the party.
/**
 * The game object class for a follower. A follower is an allied character, other than the front character, displayed in the party.
 *
 * @class
 * @extends Game_Character
 */
function Game_Follower() {
    this.initialize(...arguments);
}

Game_Follower.prototype = Object.create(Game_Character.prototype);
Game_Follower.prototype.constructor = Game_Follower;

Game_Follower.prototype.initialize = function(memberIndex) {
    Game_Character.prototype.initialize.call(this);
    this._memberIndex = memberIndex;
    this.setTransparent($dataSystem.optTransparent);
    this.setThrough(true);
};

/**
 * Refresh the follower
 */
Game_Follower.prototype.refresh = function() {
    const characterName = this.isVisible() ? this.actor().characterName() : "";
    const characterIndex = this.isVisible() ? this.actor().characterIndex() : 0;
    this.setImage(characterName, characterIndex);
};

/**
 * Get the game actor the follower represents
 *
 * @return {Game_Actor} The actor the follower represents
 */
Game_Follower.prototype.actor = function() {
    return $gameParty.battleMembers()[this._memberIndex];
};

/**
 * Check if the follower is visible
 *
 * @return {boolean} True if visible
 */
Game_Follower.prototype.isVisible = function() {
    return this.actor() && $gamePlayer.followers().isVisible();
};

/**
 * Check if the follower is gathered
 *
 * @return {boolean} True if gathered
 */
Game_Follower.prototype.isGathered = function() {
    return !this.isMoving() && this.pos($gamePlayer.x, $gamePlayer.y);
};

Game_Follower.prototype.update = function() {
    Game_Character.prototype.update.call(this);
    this.setMoveSpeed($gamePlayer.realMoveSpeed());
    this.setOpacity($gamePlayer.opacity());
    this.setBlendMode($gamePlayer.blendMode());
    this.setWalkAnime($gamePlayer.hasWalkAnime());
    this.setStepAnime($gamePlayer.hasStepAnime());
    this.setDirectionFix($gamePlayer.isDirectionFixed());
    this.setTransparent($gamePlayer.isTransparent());
};

/**
 * Chase another character object
 *
 * @param {Game_Character} The character to chase
 */
Game_Follower.prototype.chaseCharacter = function(character) {
    const sx = this.deltaXFrom(character.x);
    const sy = this.deltaYFrom(character.y);
    if (sx !== 0 && sy !== 0) {
        this.moveDiagonally(sx > 0 ? 4 : 6, sy > 0 ? 8 : 2);
    } else if (sx !== 0) {
        this.moveStraight(sx > 0 ? 4 : 6);
    } else if (sy !== 0) {
        this.moveStraight(sy > 0 ? 8 : 2);
    }
    this.setMoveSpeed($gamePlayer.realMoveSpeed());
};