extends Node

const WIDTH=1024
const HEIGHT=1024
const GRID_SIZE=float(64.0)
const GRID_COLOR="#000000"
const SHOVEL_DURATION=1

var DebugLabel = null
var HexGrid = null
var HexCell = null
var OceanNavGrid = null
var IslandNavGrid = null

var hex_size = 128
var debug_nav = false

# Called when the node enters the scene tree for the first time.
func _ready():
	HexGrid = preload("../thirdparty/gdhexgrid/HexGrid.gd").new()
	HexGrid.hex_scale = Vector2(hex_size, hex_size)

	OceanNavGrid = preload("../thirdparty/gdhexgrid/HexGrid.gd").new()
	OceanNavGrid.hex_scale = Vector2(hex_size, hex_size)

	IslandNavGrid = preload("../thirdparty/gdhexgrid/HexGrid.gd").new()
	IslandNavGrid.hex_scale = Vector2(hex_size, hex_size)
	
	HexCell = preload("../thirdparty/gdhexgrid/HexCell.gd").new()

	HexTileDrawer.hex_scale = Vector2(hex_size, hex_size)


func ClearDebugLabel():
	if DebugLabel == null:
		return
	
	DebugLabel.text = ""


func DebugLabelAdd(text):
	if DebugLabel == null:
		return
		
	DebugLabel.text = DebugLabel.text + text + "\n"


func ScreenToWorld(pos: Vector2, camera: Camera2D):
	pos = pos - OS.get_window_safe_area().size * 0.5
	return camera.offset + pos * camera.zoom


func ScreenToHex(pos: Vector2, camera: Camera2D):
	return Globals.HexGrid.get_hex_at(ScreenToWorld(pos, camera)).axial_coords


func HexToWorld(coord: Vector2):
	return Globals.HexGrid.get_hex_center(coord)


func WorldToHex(pos: Vector2):
	return Globals.HexGrid.get_hex_at(pos).axial_coords


func WorldToHexCenter(pos: Vector2):
	return Globals.HexGrid.get_hex_center(Globals.HexGrid.get_hex_at(pos).axial_coords)


func WorldToScreen(pos: Vector2, camera: Camera2D):
	return pos * camera.zoom + camera.offset


func WorldLineToHexTiles (start: Vector2, target: Vector2):
	var start_cell = HexCell.new_hex(WorldToHex(start))
	var target_coord = WorldToHex(target)
	var path_cells = start_cell.line_to(target_coord)
	
	var path = []
	for cell in path_cells:
		path.append(HexToWorld(cell.axial_coords))

	return path