/*
    @Packet name                EntityNew
    @Packet identifier          134
    @Description                Holds data about the entity that a player encountered
    @Data                       -
    @Structure                  -
*/

module.exports.player = function (data) {
    const destinationX = data.currentNode[0];
    const destinationY = data.currentNode[1];

    const curHP = data.hp.current;
    const maxHP = data.hp.maximum;
    const x = data.position.x;
    const y = data.position.y;
    const name = data.name;
    const guild = data.guildTag;
    const id = data.id;
    const mapID = data.mapID;
    const speed = data.speed;
    const typeID = data.typeID;
    const textureID = data.textureID;
    const isMoving = data.isMoving;
    const pirateLevel = data.pirateLevel;
    const globalRank = data.globalRank;
    const levelRank = data.levelRank;

    let packetLength = 28 + name.length + (guild ? guild.length : 0) + 1 + 4;
    if (isMoving) packetLength += 4;

    const buffer = new ArrayBuffer(packetLength);
    const view = new DataView(buffer);

    view.setUint8(0, 134); 
    view.setUint8(1, packetLength); 
    view.setUint8(2, typeID); 
    view.setUint32(3, id); 
    view.setUint32(7, curHP); 
    view.setUint32(11, maxHP); 
    view.setUint16(15, x); 
    view.setUint16(17, y); 
    view.setUint16(19, speed); 
    view.setUint8(21, pirateLevel); 
    view.setUint8(22, mapID); 
    view.setUint8(23, textureID); 
    view.setUint8(24, isMoving); 
    view.setUint8(25, globalRank); 
    view.setUint8(26, levelRank); 
    view.setUint8(27, name.length); 
    view.setUint8(28, guild ? guild.length : 0); 

    if (isMoving) {
        view.setUint16(29, destinationX); 
        view.setUint16(31, destinationY); 
    };
    
    const nameBuffer = Buffer.from(name);
    for (const pair of nameBuffer.entries()) {
        const index = pair[0];
        view.setUint8(isMoving ? index + 33 : index + 29, pair[1]);
    };
    
    if (guild) {
        const guildBuffer = Buffer.from(guild);
        for (const pair of guildBuffer.entries()) {
            const index = pair[0];
            view.setUint8(isMoving ? index + 33 + name.length : index + 29 + name.length, pair[1]);
        };

        view.setUint32(isMoving ? guild.length + name.length + 33 : guild.length + name.length + 29, data.guildColor);
    };

    const metadata = [curHP / maxHP, x, y, typeID];

    return {
        buffer,
        metadata
    };
};

module.exports.npc = function (data) {
    const destinationX = data.path[0];
    const destinationY = data.path[1];  

    const { id, speed, size, typeID, entityTypeID, behaviourBits, activeEffectsBits, isAdmiral, isMoving, isSpeedLowered } = data;

    const packetLength = (isMoving ? 31 : 27) + 1;
    const buffer = new ArrayBuffer(packetLength);
    const view = new DataView(buffer);

    const curHP = data.hp.current;
    const maxHP = data.hp.maximum;
    const x = data.position.x;
    const y = data.position.y;

    const intermediatePositionX = 0
    const intermediatePositionY = 0

    view.setUint8(0, 134); 
    view.setUint8(1, packetLength); 
    view.setUint8(2, typeID) 
    view.setUint32(3, id); 
    view.setUint8(7, entityTypeID) 
    view.setUint32(8, curHP); 
    view.setUint32(12, maxHP); 
    view.setUint16(16, x); 
    view.setUint16(18, y); 
    view.setUint16(20, speed); 
    view.setUint8(22, activeEffectsBits); 
    view.setUint8(23, +isMoving);
    view.setUint8(24, +isSpeedLowered);
    view.setUint8(25, +isAdmiral);
    view.setUint8(26, activeEffectsBits);
    view.setUint8(27, size);

    if (isMoving) {
        view.setUint16(28, destinationX); 
        view.setUint16(30, destinationY); 
    };

    const metadata = [curHP / maxHP, x, y, typeID];

    return {
        buffer,
        metadata
    };
}; 

module.exports.monster = function (data) {
    const packetLength = 20 + 1;
    const buffer = new ArrayBuffer(packetLength);
    const view = new DataView(buffer);

    const { typeID, id, position, isAdmiral, entityTypeID, hp } = data;

    view.setUint8(0, 134);
    view.setUint8(1, packetLength);
    view.setUint8(2, typeID);
    view.setUint32(3, id);
    view.setUint8(7, entityTypeID);
    view.setUint8(8, isAdmiral);
    view.setUint32(9, hp.current);
    view.setUint32(13, hp.maximum);
    view.setUint16(17, position.x);
    view.setUint16(19, position.y);

    const metadata = [hp.current / hp.maximum, position.x, position.y, typeID];

    return {
        buffer,
        metadata
    };
};

module.exports.tower = function (data) {
    const packetlength = (data.guildTag ? 23 : 20) + 1 + 4;
    const buffer = new ArrayBuffer(packetlength);
    const view = new DataView(buffer);
    
    const { hp, position, guildTag, id, entityTypeID, typeID, guildColor, order } = data;    

    view.setUint8(0, 134);
    view.setUint8(1, packetlength);
    view.setUint8(2, typeID);
    view.setUint32(3, id);
    view.setUint16(7, position.x);
    view.setUint16(9, position.y);
    view.setUint32(11, hp.current);
    view.setUint32(15, hp.maximum);
    view.setUint8(19, entityTypeID);
    view.setUint8(20, order);

    if (guildTag) {
        const guildBuffer = Buffer.from(guildTag);

        for (const pair of guildBuffer.entries()) {
            const index = pair[0];
            view.setUint8(21 + index, pair[1]);
        };

        view.setUint32(24, guildColor);
    };

    const metadata = [hp.current / hp.maximum, position.x, position.y, typeID];

    return {
        buffer,
        metadata
    };
};

module.exports.collectable = function (data) {
    const packetLength = 11 + 1;
    const buffer = new ArrayBuffer(packetLength);
    const view = new DataView(buffer);

    const { typeID, id, entityTypeID, position } = data;

    view.setUint8(0, 134);
    view.setUint8(1, packetLength);
    view.setUint8(2, typeID);
    view.setUint32(3, id);
    view.setUint8(7, entityTypeID);
    view.setUint16(8, position.x);
    view.setUint16(10, position.y);

    const metadata = [position.x, position.y, typeID];

    return {
        buffer,
        metadata
    };
};