const Player = require('./player.js')
const Board = require('./board.js')
const readline = require('readline')
var prompt = require('prompt-sync')({
  autocomplete: null,
})

var player1 = new Player("Player 1")
var player2 = new Player("Player 2")
var currentPlayer = player1

function gameSetup(player) {
  console.log(`${player.name}, time to place your ships.`)
  for (var el in player.ships) {
    getInput(player.ships[el], player.ships[el].name, player)
  }
}

function getInput(ship, shipName, player) {
  var letter = shipName[0]
  var pair1 = prompt(`Place your ${shipName}, start position `)
  var pair2 = prompt(`Place your ${shipName}, end position `)
  while (!validCoords(pair1, pair2, player, ship)) {
    var pair1 = prompt(`Place your ${shipName}, start position `)
    var pair2 = prompt(`Place your ${shipName}, end position `)
  }
  player.board.placeShip(ship, [pair1, pair2], letter)
}

function validCoords(p1, p2, player, ship) {
  var x1 = parseInt(p1[1])
  var y1 = parseInt(p1[3])
  var x2 = parseInt(p2[1])
  var y2 = parseInt(p2[3])

  // Ensure coordinates in bounds.
  if (x1 < 0 || x2 < 0 || y1 < 0 || y2 < 0) {
    console.log("Coordinates out of bounds")
    return false
  }

  if (x1 > 6 || x2 > 6 || y1 > 6 || y2 > 6) {
    console.log("Coordinates out of bounds")
    return false
  }

  // If both x coords are the same, then the y coords must be different, IE, no diagonal ships.
  if (!(((x1 != x2) && (y1 === y2)) || ((x1 === x2) && (y1 != y2)))) {
    console.log("Ships cannot be placed diagonally.")
    return false

  }

  // Ensure space isn't already populated
  if (x1 != x2) {
    var len = Math.abs(x1 - y1)

    for (var i = x1; i < x2; i++) {
      if (player.board.cells[y1][i] != '~') {
        console.log("A ship already exists there.")
        return false
      }
    }

    // Ensure the distance between the two coordinates is big enough to fit the whole ship.
    if (Math.abs(x1 - x2) != ship.length) {
      console.log("Space is too small or too large to fit ship.")
      return false
    }

  } else {
    var len = Math.abs(y1 - y2)

    for (var i = y1; i < y2; i++) {
      if (player.board.cells[i][x1] != '~') {
        console.log("A ship alredy exists there.")
        return false
      }
    }

    if (Math.abs(y1 - y2) != ship.length) {
      console.log("Space is too small or too large to fit ship.")
      return false
    }

  }
  return true
}

function getAttackCoords() {
  return prompt('Enter attack target in the form [y,x] ')
}

function oppositePlayer() {
  var other = (currentPlayer === player1 ? player2 : player1)
  return other
}

function playGame() {
  while (!currentPlayer.lost()) {
    console.log(`${currentPlayer.name}, it's your turn!`)
    console.log("Your opponent's board:")
    console.log(oppositePlayer().board.obfuscateBoard())
    var attackCoords = getAttackCoords()
    oppositePlayer().board.hit(attackCoords, oppositePlayer())
    currentPlayer = oppositePlayer()
  }
  console.log(`${currentPlayer.name} loses!`)
}

gameSetup(player1)
gameSetup(player2)
playGame()