const WebSocket = require('ws')
const { v4: uuidv4 } = require('uuid')
const puzzles = require('./puzzles.json')
const names = require('./assignedNames.json')
const crypto = require('crypto')

const wss = new WebSocket.Server({ port: 8080 })
const rooms = {} // Stores rooms and their clients
const wheel = [
  'lose a turn',800,350,450,700,300,600,5000,
  300,600,300,500,800,550,400,300,900,500,'spin again',
  900,'Bankrupt',600,400,300
] //represents wheel in wheel of fortune game.
//const wheel = ['spin again','Bankrupt','lose a turn']
function removeProp(obj, prop) {
  obj = JSON.parse(JSON.stringify(obj))
  if(!Array.isArray(prop)){
    if (!Object.hasOwn(obj,prop)) {
      console.error(`the property '${prop}' you are trying to remove doesn't exist on this object!`)
    } else {
      delete obj[prop]
    }
  }
  else {
    for (let i = 0; i < prop.length; i++) {
      const key = prop[i]
      if (!Object.hasOwn(obj, key)) {
        console.error(`The property '${key}' you are trying to remove doesn't exist on this object!`)
      } else {
        delete obj[key]
      }
    }
  }
  return obj
}
//make sure this is run so puzzles are easier to contruct
function checkPuzzleData(puzzles) {
  for(let puzzle in puzzles) {
    let i = puzzle
    puzzle = puzzles[puzzle]
    if (Array.isArray(puzzle.answer)) {
      if (puzzle.answer.length != 4) {
        throw new Error(`
        puzzle at index ${i} doesn't have the correct amount of slots defined. The proper amount of slots is 4, and you have ${puzzle.answer.length}. use "" to denote an empty line.
        `)
      }
      for (let p of puzzle.answer){
        if (p.length > 12) {
          throw new Error(`${p} (${p.length} characters long) is longer than 12 characters. only twelve characters allowed per line`)
        }
      }
    }
    else if (typeof puzzle.answer == 'string') {
      if (puzzle.answer.length > 12) {
        throw new Error(`${puzzle.answer} (${puzzle.answer.length} characters long) is longer than 12 characters. only twelve characters allowed per line`)
      }
    }
  }
}
function getRandomValue(array) {
  const randomIndex = crypto.randomInt(0, array.length)
  return array[randomIndex]
}
function shuffleArray(array) {
  for (let i = array.length - 1; i > 0; i--) {
    // Generate a cryptographically secure random index
    const j = crypto.randomInt(0, i + 1); 
    // Swap elements
    [array[i], array[j]] = [array[j], array[i]]
  }
  return array
}

const DefaultNames = shuffleArray(names)
let NameIndex = 0
function getRandomName() {
  if (NameIndex >= DefaultNames.length) {
    NameIndex = 0
  }else{
    NameIndex++
  }
  //since we've incremented the index but not returned the value, 
  //calculate the index again
  return NameIndex === 0 ? DefaultNames[NameIndex] : DefaultNames[NameIndex-1]
}



function loadCurrentPuzzle(gameStateObject) {
  console.log(gameStateObject)
  let letterArray
  //make sure we only show whats given in the letterArray, and empty values for everything else
  function processPuzzle(letterArray,given) {
    let puzzleArray = []
    for (let letter of letterArray) {
      if (letter == ' ') {
        puzzleArray.push(' ')
        continue
      }
      let letterFound = false
      for (let g of given ) {
        if(g.toUpperCase() == letter.toUpperCase()) {
          puzzleArray.push(g)
          letterFound = true
        }
      }
      if (!letterFound) {puzzleArray.push('')}
    }
    console.log('in loadCurrentPuzzle: ',puzzleArray)
    return puzzleArray
  }
  
  //calculate the puzzle for now we'll just go through however many iterations there are
  //for each slot
  if (Array.isArray(gameStateObject.puzzles[gameStateObject.puzzleLevel].answer)) {
    let formattedPuzzle = []
    for (let i of gameStateObject.puzzles[gameStateObject.puzzleLevel].answer) {
      letterArray = i.split('')
      const given = gameStateObject.puzzles[gameStateObject.puzzleLevel].given
      formattedPuzzle.push(processPuzzle(letterArray,given))
    }
    return {
      'answer':gameStateObject.puzzles[gameStateObject.puzzleLevel].answer,
      'given':gameStateObject.puzzles[gameStateObject.puzzleLevel].given,
      'category':gameStateObject.puzzles[gameStateObject.puzzleLevel].category,
      'puzzle':formattedPuzzle,
    }
  }
  else {
    letterArray = gameStateObject.puzzles[gameStateObject.puzzleLevel].answer.split('')
    const given = gameStateObject.puzzles[gameStateObject.puzzleLevel].given
    gameStateObject.puzzles[gameStateObject.puzzleLevel].puzzle = processPuzzle(letterArray, given)
    //console.log(gameStateObject.puzzles[gameStateObject.puzzleLevel].puzzle);

    return {
      'answer':gameStateObject.puzzles[gameStateObject.puzzleLevel].answer,
      'given':gameStateObject.puzzles[gameStateObject.puzzleLevel].given,
      'category':gameStateObject.puzzles[gameStateObject.puzzleLevel].category,
      'puzzle':gameStateObject.puzzles[gameStateObject.puzzleLevel].puzzle,
    }
  }
}

function checkGuess(letter,gameStateObject) {
  console.log('checkguess: ',gameStateObject,letter)
  const currentPuzzle = gameStateObject.puzzles[gameStateObject.puzzleLevel]

  console.log(currentPuzzle) 
  if (typeof currentPuzzle.answer == 'string') {
    //check if user already guessed one of teh given letters
    if (currentPuzzle.puzzle.find((x)=> x.toUpperCase() == letter.toUpperCase())) {
      console.log('user gave a guess on a given letter...')
      return false
    }
    //first create an indexed hashMap
    let charArray = currentPuzzle.answer.split('')
    let matches = []
    for(const c in charArray) {
      const char = charArray[c]
      if (letter.toUpperCase() == char.toUpperCase()) {
        matches.push({id:c,letter:char})
      }
    }

    //if there are any matches write them to the gameState Object
    if (!matches.length) {
      return false
    }
    else {
      for(const m of matches) {
        gameStateObject.puzzles[gameStateObject.puzzleLevel].puzzle[m.id] = m.letter
      }
      //make sure to check if a win occurred
      // convert the answer string into an array of characters
      let checkAnswer = currentPuzzle.answer.split('')
      if (currentPuzzle.puzzle.every((val,i)=> val.toUpperCase() === checkAnswer[i].toUpperCase())) {
        return 'puzzleSolved'
      }
      console.log('matches found!!!', gameStateObject.puzzles[gameStateObject.puzzleLevel].puzzle)
      return [true, matches.length]
    }
  }
  else if (Array.isArray(currentPuzzle.answer)) {
    //
  }
  else console.error('invalid input to checkGuess() function',currentPuzzle.puzzle[0])

}
//these functions must have both gameStateobject and websockets initialized before use!!!
function rewardUser(gameStateObject,ws) {
  const roomCode = ws.roomCode
  const room = rooms[ws.roomCode]
  //find the current player
  let currentUserTurn = gameStateObject.players[gameStateObject.turn]
  currentUserTurn.win++
  gameStateObject.puzzleLevel++
  
  room.clients.forEach((client) => {
    client.send(JSON.stringify({ 
      type: 'puzzle_solved', roomCode,
      user: currentUserTurn.name 
    }))
  })
}
function changeTurn(gameStateObject,ws) {
  const room = rooms[ws.roomCode]

  if (gameStateObject.turn == gameStateObject.players.length - 1) {
    gameStateObject.turn = 0
  }
  else gameStateObject.turn++

  //alert next user of their turn
  room.clients.forEach((client) => {
    client.send(JSON.stringify(
      { type: 'next_turn',
        user:room.gameState.players[room.gameState.turn].name,
      }))
  })
}
function loadNewPuzzle(gameStateObject,ws) {
  const room = rooms[ws.roomCode]
  const newPuzzle = loadCurrentPuzzle(gameStateObject)
  room.gameState.turnState = 'spin'
  room.gameState.puzzles[room.gameState.puzzleLevel] = newPuzzle
  room.gameState.levelsRemaining = (room.gameState.puzzles.length - 1 - room.gameState.puzzleLevel)

  room.clients.forEach((client) => {
    client.send(JSON.stringify({ 
      type: 'new_puzzle',
      roomCode: ws.roomCode, 
      // eslint-disable-next-line no-undef
      puzzle: removeProp(newPuzzle,'answer'),
      turn:room.gameState.turn,
      turnState:room.gameState.turnState
    }))
  })
}
// function checkIfClientExistsInRoom(ws,room) {
//   console.log(room,ws)
//   //assumes ws message is sent and room code exists
//   for(const c in room.clients) {
//     const client = room.clients[c]
//     if (ws.identifierToken == client.identifierToken && ws.roomCode == client.roomCode) {
//       return true
//     }
//   }
//   return false
// }

checkPuzzleData(puzzles)

// server.js
wss.on('connection', (ws) => {
  ws.on('message', (message) => {
    const data = JSON.parse(message)
    if (data.type === 'change_name') {
      const roomCode = ws.roomCode
      const room = rooms[ws.roomCode]
      console.log(room)
      console.log(room.leader.name,room.clients[0].name)
      console.log(room.clients.filter((i)=> i.name == data.deadName))
      console.log(ws.name,ws.identifierToken)
      //change names in all places.
      //if the leader wants to change their name account for this
      //note this could probably be exploited oneday and break the game but whatever
      //since there is no logging in of users this is bound to happen.

      //find the names by index using the identifier Token which i user can't easily create
      //a name collision.
      const nameToChange = room.clients.findIndex((i)=> i.identifierToken == ws.identifierToken )
      console.log(nameToChange)
      if (nameToChange != -1) {
        room.clients[nameToChange].name = data.newName
      }
      if (room.leader.identifierToken == room.clients[nameToChange].identifierToken) {
        room.leader.name = data.newName
      }
      //if the user is not the leader, in theory just change the name on the clients list
      //not sure if it exists in other places but test and see

      //send name changed event to client, similar to joined room but it will work when people are in game.
      ws.send(JSON.stringify({ 
        type: 'changed_name_you', roomCode,
        isLeader: rooms[roomCode].leader === ws,
        you:data.newName
      }))
      room.clients.forEach((client) => {
        client.send(JSON.stringify({ 
          type: 'changed_name', roomCode,
          isLeader: room.leader === ws ,
          clients: room.clients.map((i)=> i.name),
          leaderName:room.leader.name
        }))
      })

    }
    if (data.type === 'confirm_id') {
      const room = rooms[ws.roomCode]
      const currentUserTurn = room.gameState.players[room.gameState.turn]
      room.gameState.turnState = 'spin'
      if (ws.name == currentUserTurn.name && ws.identifierToken == currentUserTurn.id) {
        ws.send(JSON.stringify({ type:'next_turn_confirmed'}))
      } else ws.send(JSON.stringify({ type:'next_turn_denied'}))
    }
    if (data.type === 'create_room') {
      const roomCode = uuidv4().slice(0, 5)
      ws.name = getRandomName()
      ws.identifierToken = uuidv4().slice(0, 5)
      rooms[roomCode] = { 
        clients: [ws], 
        leader: ws, 
        gameState: {
          started:false,
          puzzles:shuffleArray(puzzles),
          puzzleLevel:0,
          turn:0,
          turnState:null,
          players:[]
        },
      }
      console.log(rooms[roomCode].clients[0].name)
      ws.roomCode = roomCode
      ws.send(JSON.stringify({ type: 'room_created', roomCode,
        isLeader: true,
        leaderName: ws.name,
        clients: rooms[roomCode].clients.map((i)=> i.name),
        you:ws.name
      }))
    }

    if (data.type === 'join_room') {
      const { roomCode } = data
      console.log(rooms)
      console.log(rooms[roomCode],roomCode)

      if (!rooms[roomCode]) {
        ws.send(JSON.stringify({ type: 'error', message: 'Room not found' }))
      }
      else if (rooms[roomCode].gameState.started) {
        ws.send(JSON.stringify({ type: 'error', message: 'Game has already Started!!!' }))
      }
      else {
        ws.name = getRandomName()
        ws.identifierToken = uuidv4().slice(0, 5)
        rooms[roomCode].clients.push(ws)
        ws.roomCode = roomCode
        const room = rooms[ws.roomCode]
        ws.send(JSON.stringify({ 
          type: 'joined_room_you', roomCode,
          isLeader: rooms[roomCode].leader === ws,
          you:ws.name
        }))

        room.clients.forEach((client) => {
          client.send(JSON.stringify({ 
            type: 'joined_room', roomCode,
            isLeader: rooms[roomCode].leader === ws ,
            clients: rooms[roomCode].clients.map((i)=> i.name),
            leaderName:rooms[roomCode].leader.name
          }))
        })
     
       
      }
      //console.log('clients: ',rooms[roomCode].leader.name);
    }

    if (data.type === 'start_game') {
      
      const room = rooms[ws.roomCode]
      if (room.gameState.started) {
        ws.send(JSON.stringify({ type: 'error', message: 'game has already been started' }))
      }
      const currentPuzzle = loadCurrentPuzzle(room.gameState)
      // const clientPuzzle = Object.entries(currentPuzzle).filter(([key])=> key != 'answer')

      room.gameState.started = true
      
      room.gameState.turnState = 'spin'
      room.gameState.puzzles[room.gameState.puzzleLevel] = currentPuzzle
      room.gameState.levelsRemaining = (room.gameState.puzzles.length - 1 - room.gameState.puzzleLevel)
      room.clients.forEach((client)=>{
        room.gameState.players.push({
          id:client.identifierToken,
          name:client.name,
          points:0,
          wins:0
        })
      })
      console.log(room.gameState)
      console.log('game started for:',room)

      if (room && room.leader === ws) {
        room.clients.forEach((client) => {
          client.send(JSON.stringify({ 
            type: 'game_started',
            roomCode: ws.roomCode, 
            // eslint-disable-next-line no-undef
            puzzle: removeProp(currentPuzzle,'answer'),
            turn:room.gameState.turn,
            turnState:room.gameState.turnState
          }))
        })
      } else {
        ws.send(JSON.stringify({ type: 'error', message: 'Only the leader can start the game' }))
      }
    }

    if (data.type === 'spin_wheel' || data.type === 'guess_letter') {
      const room = rooms[ws.roomCode]
      if (room && room.clients.includes(ws)) {
        // Handle spin and guess events
        
        if (data.type === 'spin_wheel') {
          if (room.gameState.turnState === null) {
            ws.send(JSON.stringify({ type: 'error', message: 'the game hasn\'t started yet!' }))
            return
          }else if (ws.identifierToken !== room.gameState.players[room.gameState.turn].id) {
            ws.send(JSON.stringify({ type: 'error', message: 'its not your turn to spin!' }))
            return
          }
          // Simulate a wheel spin result and update room state
          let spinResult = getRandomValue(wheel)
          if (spinResult == 'Bankrupt') {
            room.gameState.players = room.gameState.players.map((player) => {
              return player.id == ws.identifierToken ? {...player, points:0} : player
            })
          }
          if (spinResult == 'spin again') {
            
            room.gameState.players = room.gameState.players.map((player) => {
              return player.id == ws.identifierToken ? {...player, points:player.points + 0, condition:'spin again'} : player
            })
          }
          if (spinResult == 'lose a turn') {
            console.log('lose a turn here ig...?')
            changeTurn(room.gameState,ws)
          }
          room.gameState.players = room.gameState.players.map((player) => {
            return player.id == ws.identifierToken ? {...player, points:player.points + 0} : player
          })
          console.log('players', room.gameState.players)
          room.gameState.spinResult = spinResult
          console.log('spin_result',room.gameState)
          room.clients.forEach((client) =>
            client.send(JSON.stringify({ 
              type: 'spin_result', spinResult, 
              player: ws === room.leader ? 'Leader' : 'Player' 
            }))
          )
        }

        if (data.type === 'guess_letter') {
          if (room.gameState.turnState === null) {
            ws.send(JSON.stringify({ type: 'error', message: 'the game hasn\'t started yet!' }))
            return
          }else if (ws.identifierToken !== room.gameState.players[room.gameState.turn].id) {
            ws.send(JSON.stringify({ type: 'error', message: 'its not your turn to guess!' }))
            return
          }
          room.gameState.turnState = 'guess'
          const { letter } = data
          // Handle guess logic (e.g., check if the letter is in the puzzle)

          const guessResult = checkGuess(letter,room.gameState)

          if (!guessResult) {
            room.gameState.turnState = 'spin'
            //if the player guesses incorrectly, and theres more than one player,
            //its the next players turn
            room.clients.forEach((client) => {
              client.send(JSON.stringify(
                { type: 'guess_result', letter, 
                  correct: guessResult, 
                  player: ws === room.leader ? 'Leader' : 'Player',
                  turnState:room.gameState.turnState
                }))
            })

            changeTurn(room.gameState,ws)

          }
          else if(guessResult === 'puzzleSolved') {
            rewardUser(room.gameState,ws)
            loadNewPuzzle(room.gameState,ws)
          }
          else {
            //the player guessed correctly and its still their turn
            room.gameState.turn = 'spin'
            room.clients.forEach((client) =>
              client.send(JSON.stringify(
                { type: 'guess_result', letter, 
                  correct: guessResult, 
                  player: ws === room.leader ? 'Leader' : 'Player',
                  puzzle: room.gameState.puzzles[room.gameState.puzzleLevel],
                  turn:room.gameState.turn,
                  turnState:room.gameState.turnState
                }))
            )
          }
          
        }
      } else {
        ws.send(JSON.stringify({ type: 'error', message: 'You are not in this room' }))
      }
    }
  })

  ws.on('close', () => {
    if (ws.roomCode && rooms[ws.roomCode]) {
      console.log('closing')
      const room = rooms[ws.roomCode]
      const roomCode = ws.roomCode
      room.clients = room.clients.filter((client) => client !== ws)
      if (room.leader === ws && room.clients.length > 0) {
        console.log('closing within room leader')
        room.leader = room.clients[0]
        room.leader.send(JSON.stringify({ type: 'new_leader' }))
        
      }
      room.clients.forEach((client) =>
        client.send(JSON.stringify({ 
          type: 'joined_room', roomCode,
          isLeader: rooms[roomCode].leader === ws ,
          clients: rooms[roomCode].clients.map((i)=> i.name),
          leaderName:rooms[roomCode].leader.name
        }))
      )
      if (room.clients.length === 0) delete rooms[ws.roomCode]
    }
  })
})


console.log('WebSocket server is running on ws://localhost:8080')

module.exports = {
  DefaultNames,NameIndex,
  getRandomName,getRandomValue,shuffleArray
}