import type { KeyboardCoordinateGetter } from '@dnd-kit/core'
import { KeyboardCode } from '@dnd-kit/core'
import { size } from '@planview/pv-utilities'

//Multiplier of distance when meta key is pressed
const META_SPEED = 3

/**
 * Function to return `KeyboardCoordinateGetter` to be passed into the keyboard sensor
 */
export const coordinatesFactory =
    (rowHeight: number): KeyboardCoordinateGetter =>
    (event, args) => {
        const { currentCoordinates } = args
        const modifierPressed =
            event.ctrlKey || event.metaKey || event.shiftKey || event.altKey
        const multiplier = modifierPressed ? META_SPEED : 1
        const yDelta = rowHeight * 0.5 * multiplier
        const xDelta = size.small * multiplier

        switch (event.code) {
            case KeyboardCode.Right:
                return {
                    ...currentCoordinates,
                    x: currentCoordinates.x + xDelta,
                }
            case KeyboardCode.Left:
                return {
                    ...currentCoordinates,
                    x: currentCoordinates.x - xDelta,
                }
            case KeyboardCode.Down:
                if (modifierPressed) {
                    event.preventDefault()
                }
                return {
                    ...currentCoordinates,
                    y: currentCoordinates.y + yDelta,
                }
            case KeyboardCode.Up:
                if (modifierPressed) {
                    event.preventDefault()
                }
                return {
                    ...currentCoordinates,
                    y: currentCoordinates.y - yDelta,
                }
        }

        return undefined
    }