import { computed } from "vue";

function setPoints(page, set){
  let points = [0, 0]; // need to get updated for more player
  let ret;
  const m = page.game.sets.length-1;
  for (const i in page.game.sets) {
    const set = page.game.sets[i];
    const points = legPoints(page, set, set.legs[set.legs.length-1]);
    const winner = getWinner(points, page.legs);
    if (winner > -1)
      points[winner] += 1;
    else
      return points;

    if (set == set){
      return points;
    }
  }
  return points;
}

function legPoints(page, set, leg){
  let points = [0, 0]; // need to get updated for more player
  let ret;
  const m = set.legs.length-1;
  for (const i in set.legs) {
    const l = set.legs[i];
    if (l.visits[l.visits.length-1].toGo === undefined) {
      return points;
    }
    if (l.visits[l.visits.length-1].toGo[0] == 0)
      points[0] += 1;
    else if (l.visits[l.visits.length-1].toGo[1] == 0)
      points[1] += 1;
    if (l == leg){
      return points;
    }
  }
  return points;
}

export const getFinalWinner = (page) => {
  const points = setPoints(page, page.sets[page.sets.length-1]);
  return getWinner(points, page.sets);
};

export function getGameProps(page, current_set, current_leg) {
  const ret = {};

  if (current_set === undefined) {
    current_set = computed(() => {
      if (page.game != undefined) {
        return page.game.sets[page.game.sets.length - 1]
      }
      return undefined;
    });
  }
  ret.current_set = current_set;


  if (current_leg === undefined) {
    current_leg = computed(() => {

      if (current_set.value != undefined) {
        return current_set.value.legs[current_set.value.legs.length - 1]
      }
      return undefined;
    });
  }
  ret.current_leg = current_leg;

  const current_toGo = computed(() => {
    if (current_leg.value != undefined) {
      if (current_leg.value.visits.length < 2) {
        return [page.modus, page.modus]
      } else {
        const end = current_leg.value.visits[current_leg.value.visits.length - 1].toGo;
        if (end) return end;
        return current_leg.value.visits[current_leg.value.visits.length - 2].toGo;
      }
    }
    return [0, 0]; // need to get updated for more player
  });
  ret.current_toGo = current_toGo;



  const current_set_points = computed(() => {
    if (current_set.value != undefined) {
      return setPoints(page, current_set.value);
    }
    return undefined;
  });
  ret.current_set_points = current_set_points;


  const current_leg_points = computed(() => {
    if (current_set.value != undefined || current_leg.value != undefined) {
      return legPoints(page, current_set.value, current_leg.value);
    }
    return undefined;
  });
  ret.current_leg_points = current_leg_points;


  const current_player = computed(() => {
    if (current_leg.value != undefined) {
      const len = current_leg.value.visits.length;
      return current_leg.value.visits[len - 1].player == page.players[1].uuid;
    }
    return undefined;
  });
  ret.current_player = current_player;

  const getVal = (tr) => {
    const val = tr.trim();
    if (val == "") {
      return 0;
    }
    if (val == "SB") {
      return 25;
    }
    if (val == "DB") {
      return 50;
    }
    if (val[0] == "S" || val[0] == "O" || val[0] == "I") {
      return parseFloat(val.substring(1));
    }
    if (val[0] == "D") {
      return 2 * parseFloat(val.substring(1));
    }
    if (val[0] == "T") {
      return 3 * parseFloat(val.substring(1));
    }
    if (val[0] == "M") {
      return 0;
    } else {
      // TODO: Check for Na
      return parseFloat(val);
    }
  }
  const verifySum = (sum) => {
    if (sum > 180 || [179, 178, 176, 175, 173, 172, 169, 166, 163].indexOf(sum) > -1) {
      return -1;
    } else if (current_toGo.value[current_player.value * 1] - sum < 0) {
      return -2;
    } if (current_toGo.value[current_player.value * 1] - sum == 0) {
      // bogey numbers
      if (page.out == "Double" && (sum > 170 || [169, 168, 166, 165, 163, 162, 159].indexOf(sum) > -1)) {
        return -1;
      }
      return 0;
    } else if (current_toGo.value[current_player.value * 1] - sum <= 50) {
      return 1;
    } else if (page.in != "Straight" && current_toGo.value[current_player.value * 1] == page.modus && sum != 0) {
      return 3;
    }
    return 2;
  }
  const checkVisit = (throws) => {
    const tr = throws.split(",");
    let sum = 0;
    tr.forEach((t, i) => {
      sum += getVal(t);
    });
    const res = verifySum(sum);
    return [res, sum];
  }
  ret.checkVisit = checkVisit;

  return ret;
}

function newPlayerStats(player) {
  return {
    player: player.uuid,
    average: [0, 0],
    first9: [0, 0],
    checkouts: [0, 0],
    checkins: [0, 0],
    checkinPoints: [],
    checkoutPoints: [],
    "60+": 0,
    "100+": 0,
    "140+": 0,
    "180": 0
  };
}

function addNewSetStats(stats, players) {
  stats["sets"].push(newStats(players));
  stats["sets"][0]["legs"] = [];
  return stats;
}

function addNewLegStats(stats, players) {
  stats["sets"].at(-1)["legs"].push(newStats(players));
  return stats;
}

function newStats(players) {
  const stats = {
    stats: []
  }
  players.forEach((player, i) => {
    const n = newPlayerStats(player);
    stats.stats.push(n);
  });
  return stats;
}

export function initStats(page) {
  const stats = newStats(page.players);
  stats.sets = [];
  addNewSetStats(stats, page.players);
  addNewLegStats(stats, page.players);
  page.stats = stats;
}

function newVisit(playerUUID, round) {
  return {
    player: playerUUID,
    throws: [],
    visit: round,
    checkoutTries: 0,
    checkinTries: 0,
    numDarts: 0,
  };
}

export function initGame(page) {
  page.game = {
    sets: [{
      points: new Array(page.players.length).fill(0),
      legs: [{
        points: new Array(page.players.length).fill(0),
        visits: [newVisit(page.players[0].uuid, 1)]
      }]
    }]
  }
}

function updateStats(page, visit){
  const playerUUIDs = page.players.map((p) => p.uuid);
  const k = playerUUIDs.indexOf(visit.player);

  const todos = [page.stats["stats"][k]];
  todos.push(page.stats["sets"].at(-1)["stats"][k]);
  todos.push(page.stats["sets"].at(-1)["legs"].at(-1)["stats"][k]);

  todos.forEach((value, i) => {
    todos[i]["average"][0] += visit["sum"];
    todos[i]["average"][1] += visit["numDarts"];
    if (visit["visit"] < 4) {
      todos[i]["first9"][0] += visit["sum"];
      todos[i]["first9"][1] += visit["numDarts"];
    }
    if (visit["toGo"][k] == 0) {
      todos[i]["checkouts"][0] += 1;
      todos[i]["checkoutPoints"].push(visit["sum"]);
    }
    if (visit["checkinTries"] != 0 && visit["sum"] != 0) {
      todos[i]["checkins"][0] += 1;
      todos[i]["checkinPoints"].push(visit["sum"]);
    }
    todos[i]["checkouts"][1] += visit["checkoutTries"];
    todos[i]["checkins"][1] += visit["checkinTries"];
    if (visit["sum"] == 180) {
      todos[i]["180"] += 1;
    } else if (visit["sum"] >= 140) {
      todos[i]["140+"] += 1;
    } else if (visit["sum"] >= 100) {
      todos[i]["100+"] += 1;
    } else if (visit["sum"] >= 60) {
      todos[i]["60+"] += 1;
    }
  });
}

function getWinner(points, mode) {
  const sorted = [...points].map((e,i) => [e,i]).sort((a, b) => b[0] - a[0]);
  const k = points.length;
  const sum = points.reduce((a,c) => a+c, 0);
  if (sum < mode && sorted[0][0] <= mode/k){
    // not over yet
    return -1;
  }
  if (sorted[0][0] == sorted[1][0]){
    // Draw
    return -2;
  }
  // winner id
  return sorted[0][1];
}

export const formatDate = (d) => {
  return `${d.getFullYear()}-${(d.getMonth()+1).toString().padStart(2, '0')}-${d.getDate().toString().padStart(2, '0')} ${d.getHours().toString().padStart(2, '0')}:${d.getMinutes().toString().padStart(2, '0')}`;
};

function addNewSet(page, points){
  const playerUUIDs = page.players.map((p) => p.uuid);
  const set = page.game.sets[page.game.sets.length-1];
  const leg = set.legs[set.legs.length-1];
  const k = playerUUIDs.indexOf(set.legs[0].visits[0].player);
  const p = playerUUIDs[(k+1)%playerUUIDs.length];
  page.game.sets.push({
    // points: [...points],
    legs: [{
        points: Array(playerUUIDs.length).fill(0),
        visits: [newVisit(p, 1)]
      }]
  });
}

function addNewLeg(page){
  const playerUUIDs = page.players.map((p) => p.uuid);
  const set = page.game.sets[page.game.sets.length-1];
  const leg = set.legs[set.legs.length-1];
  const k = playerUUIDs.indexOf(leg.visits[0].player);
  const p = playerUUIDs[(k+1)%playerUUIDs.length];
  page.game.sets[page.game.sets.length-1].legs.push({
    // points: [...points],
    visits: [newVisit(p, 1)]
  });
}

function clearLastVisit(page){
  const set = page.game.sets[page.game.sets.length-1];
  const leg = set.legs[set.legs.length-1];
  const visit = leg.visits[leg.visits.length-1];
  const ret = visit["throws"];
  visit["throws"] = [];
  visit["checkoutTries"] = 0;
  visit["checkinTries"] = 0;
  visit["numDarts"] = 0;
  delete visit["sum"];
  delete visit["toGo"];
  return ret;
}

export function recalcStats(page){
  const set = page.game.sets[page.game.sets.length-1];
  // const leg = set.legs[set.legs.length-1];
  // const visit = leg.visits[leg.visits.length-1];
  initStats(page);
  const lastset = page.game["sets"].length-1;
  page.game["sets"].forEach((set, i) => {
    const lastleg = set.legs.length-1;
    set.legs.forEach((leg, j) => {
      const lastvisit = leg["visits"].length-1;
      leg.visits.forEach((visit, k) => {
        if (!(k == lastvisit && j == lastleg && i == lastset)) {
          updateStats(page, visit);
        }
        if (k == lastvisit && j != lastleg) {
          addNewLegStats(page.stats, page.players);
        }
      });
      if (j == lastleg && i != lastset) {
        addNewSetStats(page.stats, page.players);
      }
    });
  });
}

export function removeLastVisit(page){
  const set = page.game.sets[page.game.sets.length-1];
  const leg = set.legs[set.legs.length-1];
  const visit = leg.visits[leg.visits.length-1];

  // delete last visit.
  leg["visits"].pop();
  if (leg["visits"].length == 0){
    set["legs"].pop();
    if (set["legs"].length == 0){
      page.game["sets"].pop();
      if (page.game["sets"].length == 0){
        initGame(page);
        return;
      }
    }
  }
  // clearLastVisit
  const ret = clearLastVisit(page);
  recalcStats(page);
  return ret;
}

export function storeVisit(page, throws, sum, numDarts, outTries, inTries=0) {
  const set = page.game.sets[page.game.sets.length-1];
  const leg = set.legs[set.legs.length-1];
  const visit = leg.visits[leg.visits.length-1];

  visit["numDarts"] = numDarts;
  visit["throws"] = throws;
  visit["checkoutTries"] = outTries;
  visit["checkinTries"] = inTries;
  visit["sum"] = sum

  const playerUUIDs = page.players.map((p) => p.uuid);
  const k = playerUUIDs.indexOf(visit["player"]);
  let toGo;
  if (leg["visits"].length-2 < 0) {
    toGo = Array(playerUUIDs.length).fill(page.modus);
  } else {
    toGo = [...leg["visits"][leg["visits"].length-2]["toGo"]];
  }
  const rest = toGo[k] - visit["sum"];
  if (rest < 0 || (page.out == "Double" && rest == 1)) {
    visit["sum"] = 0;
  } else {
    toGo[k] = rest;
  }
  visit["toGo"] = toGo;
  if (page.in != "Straight" && page.modus == toGo[k] && visit["sum"] == 0) {
    visit["checkinTries"] = 3;
  }
  // update stats
  updateStats(page, visit);

  let update = [];
  if (rest != 0) {
    // Normal case...next players turn
    const nextPlayer = playerUUIDs[(k+1)%playerUUIDs.length];
    const nVisit = newVisit(nextPlayer, visit["visit"]+1*(leg.visits[0]["player"] == nextPlayer));
    leg.visits.push(nVisit);
  }
  else {
    // rest == 0 leg finished
    const newlegp = legPoints(page, set, leg);
    let winner = getWinner(newlegp, page.legs);
    if (winner == -1) {
      // new Leg
      addNewLeg(page);
      addNewLegStats(page.stats, page.players);
    } else {
      // new set?
      const newsetp = setPoints(page, set);
      winner = getWinner(newsetp, page.sets);
      if (winner == -1) {
        // new Set
        addNewSet(page);
        addNewSetStats(page.stats, page.players);
        addNewLegStats(page.stats, page.players);
      } else {
        // ask for continue or game over
        if (winner == -2) {
          page.stats["winner"] = "DRAW";
        } else {
          page.stats["winner"] = visit["player"];
        }

        page.enddate = formatDate(new Date(Date.now()));
        return [newsetp, newlegp];
      }
    }
  }
  return false;
}

export function endGame(page){
  // const set = page.game.sets[page.game.sets.length-1];
  // const leg = set.legs[set.legs.length-1];
  // const visit = leg.visits[leg.visits.length-1];
  // const winner = getWinner(newsetp, page.sets);
  // set["points"] = newsetp;
  // leg["points"] = newlegp;
}

export function extension(page){
  const set = page.game.sets[page.game.sets.length-1];
  const leg = set.legs[set.legs.length-1];
  // leg["points"] = newlegp;
  // new Leg
  addNewLeg(page);
  addNewLegStats(page.stats, page.players);
}