/*
    @Packet name                Reward
    @Packet identifier          131
    @Description                Contains information about rewards the player got
    @Data                       pId
    @Structure                  -
*/

module.exports = {
    init: (isRegular, length) => {
        const maxEntries = Math.floor((255 - (1 + 2)) / 6);
        let submittedLength = length;

        if (length > maxEntries) length = maxEntries;
        submittedLength -= length;

        const offset = 3;
        const packetLength = length * 6 + 1 + 2;
        let i = 0;
        let j = 0;

        const buffer = new ArrayBuffer(packetLength);
        const view = new DataView(buffer);
        view.setUint8(0, 131);
        view.setUint8(1, packetLength);
        view.setUint8(2, isRegular ? 255 : 0);

        const buffers = [buffer];
        const views = [view];

        return {
            update: d => {
                const startIndex = i * 6;
                views[j].setUint8(offset + startIndex, d.categoryID);
                views[j].setUint8(offset + startIndex + 1, d.id);
                views[j].setInt32(offset + startIndex + 2, d.amount);

                i++;

                if (maxEntries === i) {
                    i = 0;
                    j++;
                    
                    if (submittedLength > maxEntries) length = maxEntries;
                    else length = submittedLength;

                    submittedLength -= length
                    if (submittedLength < 0) length = maxEntries + submittedLength;

                    const packetLength = length * 6 + 1 + 2;
                    const buffer = new ArrayBuffer(packetLength);
                    const view = new DataView(buffer);
                    view.setUint8(0, 131);
                    view.setUint8(1, packetLength);
                    view.setUint8(2, isRegular ? 255 : 0);

                    buffers.push(buffer);
                    views.push(view);
                };
            },
            get: () => {
                return buffers;
            }
        };
    }
};