require 'point'
require 'config'

-- Point table with grid-based coordinates
---@class GridPoint: Point
GridPoint = Point

-- Convert grid x, y to global x, y
---@return Point
function GridPoint:absolute()
    return Point:new(
        self.x * Config.cellSize,
        self.y * Config.cellSize
    )
end

-- Same as coords, but converted to global coords
---@return number, number
function GridPoint:globalCoords()
    return self.x * Config.cellSize - Config.cellSize / 2,
    self.y * Config.cellSize - Config.cellSize / 2
end

-- Returns local coords from global
---@param point Point
---@return GridPoint
function GridPoint.snapCoords( point )
    local x = math.ceil( point.x / Config.cellSize )
    local y = math.ceil( point.y / Config.cellSize )
    return GridPoint:new( x, y )
end