import { Container, Cursor, ItemData, ItemStack } from "$/common/inventory.ts";
import { PlayerInfo, ScreenLayout } from "$/common/protocol.ts";
import { Tile } from "./world.ts";

export const INVENTORY_SIZE = 9 * 4;
export const CRAFTING_SIZE = 10;

// a screen the server opened for this player, showing a tile's container
export interface OpenScreen {
	tile: Tile;
	container: Container;
	layout: ScreenLayout;
	properties(): Record<string, number>;
}

// what's saved about a player between sessions, by name
export interface SavedPlayer {
	x: number;
	y: number;
	z: number;
	yaw: number;
	pitch: number;
	selected_slot: number;
	inventory: (ItemData | null)[];
}

export class ServerPlayer {
	readonly conn: number;
	readonly id = crypto.randomUUID();
	readonly name: string;

	x = 0;
	y = 100;
	z = 0;
	yaw = 0;
	pitch = 0;

	inventory = new Container(INVENTORY_SIZE);
	crafting = new Container(CRAFTING_SIZE);
	cursor: Cursor = { item: undefined };
	selected_slot = 0;
	screen: OpenScreen | undefined;

	// last json sent for each synced thing, so only changes get sent
	sent = new Map<string, string>();

	constructor(conn: number, name: string) {
		this.conn = conn;
		this.name = name;
	}

	get held_item(): ItemStack | undefined {
		return this.inventory.get_item(this.selected_slot);
	}

	info(): PlayerInfo {
		return { id: this.id, name: this.name, x: this.x, y: this.y, z: this.z, yaw: this.yaw, pitch: this.pitch };
	}

	save(): SavedPlayer {
		return {
			x: this.x,
			y: this.y,
			z: this.z,
			yaw: this.yaw,
			pitch: this.pitch,
			selected_slot: this.selected_slot,
			inventory: this.inventory.to_data(),
		};
	}

	load(saved: SavedPlayer) {
		this.x = saved.x;
		this.y = saved.y;
		this.z = saved.z;
		this.yaw = saved.yaw;
		this.pitch = saved.pitch;
		this.selected_slot = saved.selected_slot;
		this.inventory.load(saved.inventory);
	}
}