"use strict";
/*jslint vars:true, plusplus:true, forin:true*/
/* eslint indent: ["error", 4, { "outerIIFEBody": 0 }] */
//
// generateCubemapImages.js
// 
// **********************
// *****START README*****
// **********************
// Deselect "Developer > Avatar > Draw Mesh" so that your avatar doesn't show
// up in your capture.
//
// Here is the expected layout for the faces in an image with the 1/6 aspect ratio:
//
//         WIDTH
//       <------>
//    ^  +------+
//    |  |      |
//    |  |  +X  |
//    |  |      |
//    H  +------+
//    E  |      |
//    I  |  -X  |
//    G  |      |
//    H  +------+
//    T  |      |
//    |  |  +Y  |
//    |  |      |
//    |  +------+
//    |  |      |
//    |  |  -Y  |
//    |  |      |
//    H  +------+
//    E  |      |
//    I  |  +Z  |
//    G  |      |
//    H  +------+
//    T  |      |
//    |  |  -Z  |
//    |  |      |
//    V  +------+
//
//    FaceWidth = width = height / 6
// **********************
// ******END README******
// **********************
//
// Created by Zach Fox on 2017-08-16
// Copyright 2017 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
//

/*global Tablet, MyAvatar, Window, Menu */

(function() { // BEGIN LOCAL_SCOPE

var counter = 0,
spectatorCameraConfig = Render.getConfig("SecondaryCamera");

function resetAvatarPitchRoll() {
    print("Resetting avatar pitch/yaw/roll...");
    MyAvatar.bodyPitch = 0;
    MyAvatar.bodyYaw = 0;
    MyAvatar.bodyRoll = 0;
    MyAvatar.headPitch = 0;
    MyAvatar.headYaw = 0;
    MyAvatar.headRoll = 0;
}

function cleanup() {
    resetAvatarPitchRoll();
    counter = 0;
}

function snapshotLoop() {
    print("Starting cubemap photo capture!");
    var cameraPitch = -90,
    cameraYaw = 0,
    numSnapsPerRow = [1, 4, 1],
    numSnapsTotal = numSnapsPerRow.reduce(function(pv, cv) { return pv + cv; }, 0),
    currentRowIndex = 0,
    currentRowSnapsTaken = 0;
    
    function tick() {
        spectatorCameraConfig.orientation = Quat.fromPitchYawRollDegrees(cameraPitch, cameraYaw, 0.0);
        
        Script.setTimeout(function() {
            if (counter < numSnapsTotal) {
                print("Taking Snapshot " + (counter + 1) + "/" + numSnapsTotal);
                Window.takeSecondaryCameraSnapshot();
                cameraYaw += 360/numSnapsPerRow[currentRowIndex];
                currentRowSnapsTaken++;
                if (currentRowSnapsTaken === numSnapsPerRow[currentRowIndex]) {
                    currentRowIndex++;
                    currentRowSnapsTaken = 0;
                    cameraYaw = 0;
                    cameraPitch += 180/(numSnapsPerRow.length-1);
                    print("Pitching camera to capture row " + (currentRowIndex + 1));
                }
            } else {
                cleanup();
                return;
            }
            counter++;
            Script.setTimeout(tick, 500);
        }, 500);
    }
    tick();
}

function commenceSnapshotProcess() {
    resetAvatarPitchRoll();
    snapshotLoop();
}

function twirlAvatar(callback) {
    // Spin to load
    print("Spinning avatar to ensure content loaded...");
    resetAvatarPitchRoll();
    var bodyYaw = 0;
    function tick() {
        MyAvatar.bodyYaw = bodyYaw;
        bodyYaw += 15;
        if (bodyYaw >= 360) {
            return callback();
        }
        Script.setTimeout(tick, 90);
    }
    tick();
}

function generateCubemapImages(){
    if (counter > 0) {
        cleanup();
    } else {
        twirlAvatar(commenceSnapshotProcess);
        spectatorCameraConfig.enableSecondaryCameraRenderConfigs(true);
        spectatorCameraConfig.resetSizeSpectatorCamera(2048, 2048);
        spectatorCameraConfig.position = MyAvatar.getHeadPosition();
        spectatorCameraConfig.orientation = {x: 0, y: 0, z: 0, w: 1};
        spectatorCameraConfig.vFoV = 90;
        spectatorCameraConfig.nearClipPlaneDistance = 1.0;
        spectatorCameraConfig.farClipPlaneDistance = 1000.0;
    }
}

//
// Manage the connection between the button and the window.
//
var button;
var buttonName = "CUBEMAP";
var tablet = null;

function startup() {
    tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");
    button = tablet.addButton({
        text: buttonName
    });
    button.clicked.connect(generateCubemapImages);
}

function shutdown() {
    button.clicked.disconnect(generateCubemapImages);
    tablet.removeButton(button);
}

//
// Run the functions.
//
startup();
Script.scriptEnding.connect(shutdown);

}()); // END LOCAL_SCOPE