import * as ImGui_Impl from "./imgui_impl";
import { ImGuiWindow } from "./imgui_impl";
import * as ImGui from "imgui-js";
import { ImGuiIO } from "imgui-js"
import { ImVec4 } from "imgui-js";
import { ImVec2 } from "imgui-js";
import * as PIXI from "pixi.js";
import * as U from "./utils";

async function main(): Promise<void>
{
    console.log("main()");
    await ImGui.default();
    window.requestAnimationFrame(init);
}

const clearColor:ImVec4 = new ImVec4(0.7, 0.9, 1, 1);
function init(): void
{
    console.log("init()");
    console.log("Total allocated space (uordblks) @ _init:", ImGui.bind.mallinfo().uordblks);

    ImGui_Impl.PrePIXIInit();

    let settings = { width: 1, height: 1, antialias: true, backgroundColor: U.vec2col(clearColor) };

    let app : PIXI.Application = new PIXI.Application(settings);

    const output: HTMLElement = document.getElementById("output") || document.body;
    output.appendChild(app.view);
    app.view.tabIndex = 1;
    app.view.style.position = "absolute";
    app.view.style.left = "0px";
    app.view.style.right = "0px";
    app.view.style.top = "0px";
    app.view.style.bottom = "0px";
    app.view.style.width = "100%";
    app.view.style.height = "100%";

    ImGui_Impl.Init(app);

    ImGui.StyleColorsLight();

    ImGui_Impl.CreateDeviceObjects();

    app.ticker.add(
        (deltaTime: number) =>
        {
            const dt: number = deltaTime * 1 / (1000 * PIXI.settings.TARGET_FPMS);

            app.render();
        }
    );


    let resizeFunc = function()
    {
        app.renderer.resize(window.innerWidth, window.innerHeight);
    };

    const imgui: ImGuiWindow = new ImGuiWindow(400, 400, update);
    app.stage.addChild(imgui);

    window.onresize = resizeFunc;
    resizeFunc();
}

let windowOpen: boolean = true;
let text: string = "text";
function update(timeElapsed: number): void
{
    ImGui.SetNextWindowPos(new ImVec2(0, 0));
    ImGui.SetNextWindowSize(new ImVec2(600, 400), ImGui.ImGuiCond.Always);
    ImGui.Begin("Test Window"); 
    if (ImGui.Button("Add Text"))
    {
        text += "A";
    }
    ImGui.Text(text);
    ImGui.End();
}



/*
const gl: WebGLRenderingContext | null = ImGui_Impl.gl;
if (gl) {
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    gl.clearColor(clearColor.x, clearColor.y, clearColor.z, clearColor.w);
    gl.clear(gl.COLOR_BUFFER_BIT);
    //gl.useProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound
}

const ctx: CanvasRenderingContext2D | null = ImGui_Impl.ctx;
if (ctx) {
    // ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
    ctx.fillStyle = `rgba(${clearColor.x * 0xff}, ${clearColor.y * 0xff}, ${clearColor.z * 0xff}, ${clearColor.w})`;
    ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
}
*/

(function()
 {
     if (document.readyState == "complete")
     {
         main();
     }
     else
     {
         window.onload = main;
     }
 })();