import {Logger, logSetup} from "./logger";
import {gateway_connect, GatewayClient} from "./gateway";
import {Player} from "./protocol/player";
import {Planet, PlanetType} from "./protocol/planet";
import {MessageC2SInput, MessageC2SInput_packetInfo} from "./protocol/message_c2s";
import {encode} from "./serde";

logSetup();
const logger = new Logger("client");

export interface GlobalData {
    client: GatewayClient | null,
    players: Player[],
    planets: Planet[],
    me: Player | null,
    canvas: HTMLCanvasElement,
    spritesheet_img: HTMLImageElement | null,
    spritesheet: object | null,
    context: CanvasRenderingContext2D,
    keys: Keys,
    velocity: number
}

export interface Keys {
    up: boolean,
    left: boolean,
    down: boolean,
    right: boolean
}

export const global: GlobalData = {
    client: null,
    players: [],
    planets: [],
    me: null,
    canvas: <HTMLCanvasElement>document.getElementById("canvas"),
    spritesheet_img: null,
    spritesheet: null,
    context: <CanvasRenderingContext2D>(<HTMLCanvasElement>document.getElementById("canvas")).getContext("2d"),
    keys: {
        up: false,
        down: false,
        left: false,
        right: false
    },
    velocity: 0
}

async function client_main(server: string, username: string, texture_quality: string) {
    logger.info("StarKingdoms client - starting");

    logger.info("Loading textures");
    let spritesheet_url = `/assets/dist/spritesheet-${texture_quality}.png`;
    let spritesheet_data_url = `/assets/dist/spritesheet-${texture_quality}.json`;

    let load_textures = new Promise<void>(async (resolve) => {
        const image_promise: Promise<HTMLImageElement> = new Promise((resolve, reject) => {
            const image = document.createElement("img");
            image.src = spritesheet_url;
            image.onload = () => { resolve(image); }
            image.onerror = err => reject(err);
        });
        const dat_promise: Promise<Object> = fetch(spritesheet_data_url).then(res => res.json());
        let image = await image_promise;
        let data = await dat_promise;

        global.spritesheet_img = image;
        global.spritesheet = data;

        resolve();
    });
    await load_textures;

    logger.info("Starting the renderer");


    //let sprite = PIXI.Sprite.from(global.spritesheet?.textures["hearty.png"]);

    global.client = await gateway_connect(server, username);

    global.canvas.width = window.innerWidth;
    global.canvas.height = window.innerHeight;

    window.onresize = () => {
        global.canvas.width = window.innerWidth;
        global.canvas.height = window.innerHeight;
    }

    global.canvas.style.setProperty("background-image", `url("/assets/final/${texture_quality}/starfield.png")`);

    document.onkeydown = (e) => {
        if (e.code == "ArrowLeft" || e.code == "KeyA") { // arrow-left
            global.keys.left = true;
        } else if (e.code == "ArrowRight" || e.code == "KeyD") { // arrow-right
            global.keys.right = true;
        } else if (e.code == "ArrowUp" || e.code == "KeyW") { // arrow-up
            global.keys.up = true;
        } else if (e.code == "ArrowDown" || e.code == "KeyS") { // arrow-down
            global.keys.down = true;
        }

        let msg = MessageC2SInput.encode({
            upPressed: global.keys.up,
            downPressed: global.keys.down,
            leftPressed: global.keys.left,
            rightPressed: global.keys.right
        }).finish();

        global.client?.socket.send(encode(MessageC2SInput_packetInfo.type, msg));
    }
    document.onkeyup = (e) => {
        if (e.code == "ArrowLeft" || e.code == "KeyA") { // arrow-left
            global.keys.left = false;
        } else if (e.code == "ArrowRight" || e.code == "KeyD") { // arrow-right
            global.keys.right = false;
        } else if (e.code == "ArrowUp" || e.code == "KeyW") { // arrow-up
            global.keys.up = false;
        } else if (e.code == "ArrowDown" || e.code == "KeyS") { // arrow-down
            global.keys.down = false;
        }

        let msg = MessageC2SInput.encode({
            upPressed: global.keys.up,
            downPressed: global.keys.down,
            leftPressed: global.keys.left,
            rightPressed: global.keys.right
        }).finish();
        global.client?.socket.send(encode(MessageC2SInput_packetInfo.type, msg));
    }

    let last_time = performance.now();
    let render = (now_time: DOMHighResTimeStamp) => {
        const delta_ms = now_time - last_time;
        last_time = now_time;

        let viewer_size_x = global.canvas.width;
        let viewer_size_y = global.canvas.height;

        global.canvas.style.setProperty("background-position", `${-global.me?.x!}px ${-global.me?.y!}px`);

        global.context.setTransform(1, 0, 0, 1, 0, 0);
        global.context.clearRect(0, 0, viewer_size_x, viewer_size_y);

        // *dont* translate the camera. we're movign everything else around us. cameracentrism.
        // only translation will be to center our core module.
        global.context.translate(viewer_size_x / 2, viewer_size_y / 2);

        if (global.me !== null) {
            document.getElementById("pos").innerText = `Position: ${Math.trunc(global.me.x)}, ${Math.trunc(global.me.y)}`;
        }
        document.getElementById("vel").innerText = `Velocity: ${Math.trunc(global.velocity)}`;

        for (let i = 0; i < global.planets.length; i++) {
            let planet = global.planets[i];
            // @ts-ignore
            let tex = global.spritesheet!["frames"][planet_type_to_tex_id(planet.planetType)];
            global.context.drawImage(global.spritesheet_img!,
                tex.frame.x, // sx
                tex.frame.y, // sy
                tex.frame.w, // sw
                tex.frame.h, // sh
                (planet.x - planet.radius - global.me?.x!), // dx
                (planet.y - planet.radius - global.me?.y!), // dy
                planet.radius * 2, // dw
                planet.radius * 2); // dh

            if (planet.planetType == PlanetType.Moon) {
                if (global.me !== null) {
                    global.context.beginPath();
                    global.context.strokeStyle = "gray";
                    global.context.lineWidth = 5;
                    global.context.moveTo(global.me!.x - global.me!.x, global.me!.y - global.me!.y);
                    global.context.lineTo(planet.x - global.me!.x, planet.y - global.me!.y);
                    global.context.stroke();

                    document.getElementById("pos-moon").innerText = `Relative to Moon: ${Math.trunc(global.me!.x - planet.x)}, ${Math.trunc(global.me!.y - planet.y)}`
                }
            } else if (planet.planetType == PlanetType.Earth) {
                if (global.me !== null) {
                    global.context.beginPath();
                    global.context.strokeStyle = "limegreen";
                    global.context.lineWidth = 5;
                    global.context.moveTo(global.me!.x - global.me!.x, global.me!.y - global.me!.y);
                    global.context.lineTo(planet.x - global.me!.x, planet.y - global.me!.y);
                    global.context.stroke();
                }
            }
        }

        for (let i = 0; i < global.players.length; i++) {
            let player = global.players[i];
            // @ts-ignore
            let tex = global.spritesheet!["frames"]["hearty.png"];

            global.context.save();

            global.context.translate(player.x - global.me!.x, player.y - global.me!.y);

            global.context.textAlign = "center";
            global.context.font = "30px Segoe UI";
            global.context.fillStyle = "white";
            global.context.fillText(player.username, 0, -35);

            global.context.rotate(player.rotation);

            global.context.drawImage(global.spritesheet_img!,
                tex.frame.x, // sx
                tex.frame.y, // sy
                tex.frame.w, // sw
                tex.frame.h, // sh
                -25, -25, 50, 50); // dh

            global.context.restore();
        }

        requestAnimationFrame(render);
    }
    requestAnimationFrame(render);
}

let query = new URLSearchParams(window.location.search);

if (!(query.has("server") || query.has("username") || query.has("textures"))) {
    window.location.href = "/index.html";
}


client_main(query.get("server")!, query.get("username")!, query.get("textures")!).then(() => {});

function planet_type_to_tex_id(ty: PlanetType): string {
    if (ty == PlanetType.Earth) {
        return "earth.png"
    } else if (ty == PlanetType.Moon) {
        return "moon.png"
    }
    return "unknown.png"
}