leaky-ships/leaky-ships/lib/utils/helpers.ts

import { count } from "@components/Gamefield/Gamefield"
import { Orientation } from "@prisma/client"
import type {
  Hit,
  IndexedPosition,
  Mode,
  PointerProps,
  Position,
  ShipProps,
  Target,
  TargetList,
} from "../../interfaces/frontend"

export function borderCN(count: number, x: number, y: number) {
  if (x === 0) return "left"
  if (y === 0) return "top"
  if (x === count + 1) return "right"
  if (y === count + 1) return "bottom"
  return ""
}
export function cornerCN(count: number, x: number, y: number) {
  if (x === 0 && y === 0) return "left-top-corner"
  if (x === count + 1 && y === 0) return "right-top-corner"
  if (x === 0 && y === count + 1) return "left-bottom-corner"
  if (x === count + 1 && y === count + 1) return "right-bottom-corner"
  return ""
}
export function fieldIndex(count: number, x: number, y: number) {
  return y * (count + 2) + x
}

export const modes: Mode[] = [
  {
    pointerGrid: Array.from(Array(1), () => Array.from(Array(1))),
    type: "missile",
  },
  {
    pointerGrid: Array.from(Array(3), () => Array.from(Array(1))),
    type: "htorpedo",
  },
  {
    pointerGrid: Array.from(Array(1), () => Array.from(Array(3))),
    type: "vtorpedo",
  },
  {
    pointerGrid: Array.from(Array(3), () => Array.from(Array(3))),
    type: "radar",
  },
]

function isBorder(x: number, y: number) {
  return x < 2 || x > count + 1 || y < 2 || y > count + 1
}

export function isAlreadyHit(x: number, y: number, hits: Hit[]) {
  return !!hits.filter((h) => h.x === x && h.y === y).length
}

export function targetList(
  { x: targetX, y: targetY }: Position,
  modeInput: number | string,
): TargetList[] {
  const mode =
    typeof modeInput === "number"
      ? modeInput
      : modes.findIndex((e) => e.type === modeInput)
  if (mode < 0) return []
  const { pointerGrid, type } = modes[mode]
  const xLength = pointerGrid.length
  const yLength = pointerGrid[0].length
  return pointerGrid
    .map((arr, i) => {
      return arr.map((_, i2) => {
        const relativeX = -Math.floor(xLength / 2) + i
        const relativeY = -Math.floor(yLength / 2) + i2
        const x = targetX + (relativeX ?? 0)
        const y = targetY + (relativeY ?? 0)
        return {
          x,
          y,
          type,
          edges: [
            i === 0 ? "left" : "",
            i === xLength - 1 ? "right" : "",
            i2 === 0 ? "top" : "",
            i2 === yLength - 1 ? "bottom" : "",
          ],
        }
      })
    })
    .reduce((prev, curr) => [...prev, ...curr], [])
}

export function overlapsWithAnyBorder(target: Position, mode: number) {
  return !!targetList(target, mode).filter(({ x, y }) => isBorder(x, y)).length
}

export function composeTargetTiles(
  target: Target,
  mode: number,
  hits: Hit[],
): PointerProps[] {
  const { show } = target
  return targetList(target, mode).map((targetItem) => {
    const { x, y } = targetItem
    return {
      ...targetItem,
      show,
      imply: isAlreadyHit(x, y, hits),
    }
  })
}

export const initlialTarget = {
  x: 2,
  y: 2,
  show: false,
  orientation: Orientation.h,
}
export const initlialTargetPreview = {
  x: 2,
  y: 2,
  show: false,
  orientation: Orientation.h,
}
export const initlialMouseCursor = {
  shouldShow: false,
  x: 0,
  y: 0,
}

export const shipProps = (
  ships: ShipProps[],
  mode: number,
  targetPreview: Position & { orientation: Orientation },
) => ({
  size: mode + 2,
  variant:
    ships
      .filter((e) => e.size === mode + 2)
      .sort((a, b) => a.variant - b.variant)
      .reduce((prev, curr) => {
        return curr.variant - prev < 2 ? curr.variant : prev
      }, 0) + 1,
  x:
    targetPreview.orientation === "h"
      ? targetPreview.x - Math.floor((mode + 2) / 2)
      : targetPreview.x,
  y:
    targetPreview.orientation === "v"
      ? targetPreview.y - Math.floor((mode + 2) / 2)
      : targetPreview.y,
  orientation: targetPreview.orientation,
})
export function shipFields(ship: ShipProps, i?: number) {
  let fields: IndexedPosition[] = []
  let borders: IndexedPosition[] = []
  for (
    let x = ship.x;
    x <= (ship.orientation === "h" ? ship.x + ship.size - 1 : ship.x);
    x++
  ) {
    for (
      let y = ship.y;
      y <= (ship.orientation === "v" ? ship.y + ship.size - 1 : ship.y);
      y++
    ) {
      fields.push({ x, y, i })
    }
  }

  for (
    let x = ship.x - 1;
    x <= (ship.orientation === "h" ? ship.x + ship.size : ship.x + 1);
    x++
  ) {
    for (
      let y = ship.y - 1;
      y <= (ship.orientation === "v" ? ship.y + ship.size : ship.y + 1);
      y++
    ) {
      if (isBorder(x, y) || fields.filter((e) => e.x === x && e.y === y).length)
        continue
      borders.push({ x, y, i })
    }
  }
  return { fields, borders }
}

export function intersectingShip(
  ships: ShipProps[],
  ship: ShipProps,
  withBorder?: boolean,
) {
  const thisShip = shipFields(ship)
  const reducedShips = ships.reduce(
    (prev, curr, i) => {
      const { fields, borders } = shipFields(curr, i)
      return {
        fields: [...prev.fields, ...fields],
        borders: [...prev.borders, ...borders],
      }
    },
    { fields: [] as IndexedPosition[], borders: [] as IndexedPosition[] },
  )
  const fields = reducedShips.fields.filter(
    (e) => thisShip.fields.filter((e2) => e2.x === e.x && e2.y === e.y).length,
  )
  const borders = thisShip.fields.filter(
    (e) =>
      reducedShips.borders.filter((e2) => e2.x === e.x && e2.y === e.y).length,
  )
  const isInBorder = thisShip.fields.filter(
    (e) => withBorder && isBorder(e.x, e.y),
  )
  return {
    score: isInBorder.length ? 2 : fields.length || borders.length ? 1 : 0,
    index: fields[0]?.i,
    fields,
    borders,
  }
}