"use strict";
/*jslint vars: true, plusplus: true*/
/*global Agent, Avatar, Script, Entities, Vec3, Quat, print*/
//
//  crowd-agent.js
//  scripts/developer/tests/performance/
//
//  Created by Howard Stearns on 9/29/16.
//  Copyright 2016 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
// See crowd-agent.js

var version = 1;
var label = "summon";
function debug() {
    print.apply(null, [].concat.apply([label, version], [].map.call(arguments, JSON.stringify)));
}
var MINIMUM_AVATARS = 25; // We will summon agents to produce this many total. (Of course, there might not be enough agents.)
var DENSITY = 0.3; // square meters per person. Some say 10 sq ft is arm's length (0.9m^2), 4.5 is crowd (0.4m^2), 2.5 is mosh pit (0.2m^2).
var SOUND_DATA = {url: "http://howard-stearns.github.io/models/sounds/piano1.wav"};
var AVATARS_CHATTERING_AT_ONCE = 4; // How many of the agents should we request to play SOUND at once.
var NEXT_SOUND_SPREAD = 500; // millisecond range of how long to wait after one sound finishes, before playing the next
var ANIMATION_DATA = {
    "url": "http://howard-stearns.github.io/models/resources/avatar/animations/idle.fbx",
    // "url": "http://howard-stearns.github.io/models/resources/avatar/animations/walk_fwd.fbx", // alternative example
    "startFrame": 0.0,
    "endFrame": 300.0,
    "timeScale": 1.0,
    "loopFlag": true
};

var spread = Math.sqrt(MINIMUM_AVATARS * DENSITY); // meters
var turnSpread = 90; // How many degrees should turn from front range over.

function coord() { return (Math.random() * spread) - (spread / 2); }  // randomly distribute a coordinate zero += spread/2.
function contains(array, item) { return array.indexOf(item) >= 0; }
function without(array, itemsToRemove) { return array.filter(function (item) { return !contains(itemsToRemove, item); }); }
function nextAfter(array, id) { // Wrapping next element in array after id.
    var index = array.indexOf(id) + 1;
    return array[(index >= array.length) ? 0 : index];
}

var summonedAgents = [];
var chattering = [];
var MESSAGE_CHANNEL = "io.highfidelity.summon-crowd";
function messageSend(message) {
    Messages.sendMessage(MESSAGE_CHANNEL, JSON.stringify(message));
}
function messageHandler(channel, messageString, senderID) {
    if (channel !== MESSAGE_CHANNEL) {
        return;
    }
    debug('message', channel, messageString, senderID);
    if (MyAvatar.sessionUUID === senderID) { // ignore my own
        return;
    }
    var message = {}, avatarIdentifiers;
    try {
        message = JSON.parse(messageString);
    } catch (e) {
        print(e);
    }
    switch (message.key) {
    case "hello":
        // There can be avatars we've summoned that do not yet appear in the AvatarList.
        avatarIdentifiers = without(AvatarList.getAvatarIdentifiers(), summonedAgents);
        debug('present', avatarIdentifiers, summonedAgents);
        if ((summonedAgents.length + avatarIdentifiers.length) < MINIMUM_AVATARS ) {
            var chatter = chattering.length < AVATARS_CHATTERING_AT_ONCE;
            if (chatter) {
                chattering.push(senderID);
            }
            summonedAgents.push(senderID);
            messageSend({
                key: 'SUMMON',
                rcpt: senderID,
                position: Vec3.sum(MyAvatar.position, {x: coord(), y: 0, z: coord()}),
                orientation: Quat.fromPitchYawRollDegrees(0, Quat.safeEulerAngles(MyAvatar.orientation).y + (turnSpread * (Math.random() - 0.5)), 0),
                soundData: chatter && SOUND_DATA,
                skeletonModelURL: "http://howard-stearns.github.io/models/resources/meshes/defaultAvatar_full.fst",
                animationData: ANIMATION_DATA
            });
        }
        break;
    case "finishedSound": // Give someone else a chance.
        chattering = without(chattering, [senderID]);
        Script.setTimeout(function () {
            messageSend({
                key: 'SUMMON',
                rcpt: nextAfter(without(summonedAgents, chattering), senderID),
                soundData: SOUND_DATA
            });
        }, Math.random() * NEXT_SOUND_SPREAD);
        break;
    case "HELO":
        Window.alert("Someone else is summoning avatars.");
        break;
    default:
        print("crowd-agent received unrecognized message:", messageString);
    }
}
Messages.subscribe(MESSAGE_CHANNEL);
Messages.messageReceived.connect(messageHandler);
Script.scriptEnding.connect(function () {
    debug('stopping agents', summonedAgents);
    summonedAgents.forEach(function (id) { messageSend({key: 'STOP', rcpt: id}); });
    debug('agents stopped');
    Script.setTimeout(function () {
        Messages.messageReceived.disconnect(messageHandler);
        Messages.unsubscribe(MESSAGE_CHANNEL);
        debug('unsubscribed');
    }, 500);
});

messageSend({key: 'HELO'}); // Ask agents to report in now.
Script.setTimeout(function () {
    var total = AvatarList.getAvatarIdentifiers().length;
    if (0 === summonedAgents.length) {
        Window.alert("No agents reported.\n\Please run " + MINIMUM_AVATARS + " instances of\n\
http://cdn.highfidelity.com/davidkelly/production/scripts/tests/performance/crowd-agent.js\n\
on your domain server.");
    } else if (total < MINIMUM_AVATARS) {
        Window.alert("Only " + summonedAgents.length + " of the expected " + (MINIMUM_AVATARS - total) + " agents reported in.");
    }
}, 5000);