import "./const.ecal" as const
import "./helper.ecal" as hlp

/*
 newGameWorld creates a new game world datastructure.
*/
func newGameWorld(name) {
    let ret := hlp.copyMap(DefaultGameWorld)

    ret["key"] := name
    ret["kind"] := const.NodeKinds.ConfigurationObject

    return ret
}

DefaultGameWorld := {
    "backdrop" : null,
    "screenWidth" : 640,
    "screenHeight" : 480,
    "screenElementWidth" : 640,
    "screenElementHeight" : 480
}

/*
 newSpriteNode creates a new sprite node datastructure.
*/
func newSpriteNode(id, x, y, dim=20, rot=0, speed=0) {
    let ret := hlp.copyMap(DefaultSpriteState)

    ret["key"] := id
    ret["kind"] := const.NodeKinds.GameWorldObject

    ret["id"] := id
    ret["x"] := x
    ret["y"] := y

    ret["dim"] := dim
    ret["rot"] := rot
    ret["speed"] := speed

    return ret
}

DefaultSpriteState := {

    /* A unique ID */
    "id" : "",

    /* Sprite x position */
    "x" : 20,

    /* Sprite y position */
    "y" : 20,

    /* Dimensions of the sprite (box) */
    "dim" : 20,

    /* Flag if the sprite is moving or static */
    "isMoving" : true,

    /*
     Flag if the sprite is kept in the display or if it should be
     destroyed once it is outside of the visible area
     */
    "displayLoop" : true,

    /* Turning direction (-1 for left, 1 for right, 0 no turning) */
    "dir" : 0,

    /* Angle of rotation */
    "rot" : 0,

    /* Rotation speed for each step (in radians) */
    "rotSpeed" : math.Pi / 180,

    /* Moving direction (1 forward, -1 backwards, 0 no movement) */
    "speed" : 0,

    /* Strafing direction of sprite (-1 left, 1 right, 0 no movement) */
    "strafe" : 0,

    /* Move speed for each step */
    "moveSpeed" : 0.21
}