import type { Client } from "../client.ts";
import { InputManager } from "../input_manager.ts";
import { ClientInventories } from "../inventory.ts";
import { Player } from "./player.ts";

// how often the position goes to the server
const SEND_POSITION_INTERVAL = 1 / 10;

// the player this client controls, like minecraft's LocalPlayer
export class LocalPlayer extends Player {
	client: Client;
	inventories = new ClientInventories();

	move_speed = 4;
	jump_force = 6.7;

	#send_timer = 0;

	constructor(client: Client, id: string, name: string) {
		super(client.level, id, name);
		this.client = client;
	}

	tick(delta: number) {
		if (!this.client.screen) {
			this.#apply_input();
		}
		this.move(delta);
		this.#send_position(delta);
	}

	// turns with the mouse, like minecraft's MouseHandler.turnPlayer
	turn(mouse_dx: number, mouse_dy: number) {
		this.yaw += -mouse_dx * 0.001;
		this.pitch += -mouse_dy * 0.001;

		const limit = Math.PI / 2 - 0.01;
		this.pitch = Math.max(-limit, Math.min(limit, this.pitch));
	}

	// walking relative to where it's looking
	#apply_input() {
		const options = this.client.options;
		let input_x = 0;
		let input_z = 0;

		if (InputManager.is_key_down(options.key_left)) {
			input_x -= 1;
		}
		if (InputManager.is_key_down(options.key_right)) {
			input_x += 1;
		}
		if (InputManager.is_key_down(options.key_forward)) {
			input_z -= 1;
		}
		if (InputManager.is_key_down(options.key_back)) {
			input_z += 1;
		}

		const size = Math.hypot(input_x, input_z);
		if (size > 0) {
			input_x /= size;
			input_z /= size;
		}

		const sin = Math.sin(this.yaw);
		const cos = Math.cos(this.yaw);
		const speed = this.move_speed * (InputManager.is_key_down(options.key_sprint) ? 1.75 : 1);

		this.vx = (sin * input_z + cos * input_x) * speed;
		this.vz = (cos * input_z - sin * input_x) * speed;

		if (InputManager.is_key_down(options.key_jump) && this.on_ground) {
			this.vy += this.jump_force;
		}
	}

	#send_position(delta: number) {
		this.#send_timer += delta;
		if (this.#send_timer < SEND_POSITION_INTERVAL) {
			return;
		}
		this.#send_timer = 0;
		this.client.connection.send({
			type: "move",
			x: this.x,
			y: this.y,
			z: this.z,
			yaw: this.yaw,
			pitch: this.pitch,
		});
	}
}