"use strict";
//collision groups
//   cat.player | cat.map | cat.body | cat.bullet | cat.powerUp | cat.mob | cat.mobBullet | cat.mobShield | cat.phased
const cat = {
  player: 0x1,
  map: 0x10,
  body: 0x100,
  bullet: 0x1000,
  powerUp: 0x10000,
  mob: 0x100000,
  mobBullet: 0x1000000,
  mobShield: 0x10000000,
  phased: 0x100000000,
}

//example  https://landgreen.github.io/sidescroller/index.html?
//          &gun1=minigun&gun2=laser
//          &mod1=laser-bot&mod2=mass%20driver&mod3=overcharge&mod4=laser-bot&mod5=laser-bot&field=phase%20decoherence%20field&difficulty=2
//add ? to end of url then for each power up add
// &gun1=name&gun2=name
// &mod1=laser-bot&mod2=mass%20driver&mod3=overcharge&mod4=laser-bot&mod5=laser-bot
// &field=phase%20decoherence%20field
// &difficulty=2
//use %20 for spaces
//difficulty is 0 easy, 1 normal, 2 hard, 4 why
function getUrlVars() {
  let vars = {};
  window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function (m, k, v) {
    vars[k] = v;
  });
  return vars;
}
window.addEventListener('load', (event) => {
  const set = getUrlVars()
  if (Object.keys(set).length !== 0) {
    build.isURLBuild = true;
    game.startGame()
  }
});

//build build grid display
const build = {
  isURLBuild: false,
  onLoadPowerUps() {
    const set = getUrlVars()
    if (Object.keys(set).length !== 0) {
      for (const property in set) {
        // console.log(`${property}: ${give[property]}`);
        set[property] = set[property].replace(/%20/g, " ")
        if (property.substring(0, 3) === "gun") b.giveGuns(set[property])
        if (property.substring(0, 3) === "mod") b.giveMod(set[property])
        if (property === "field") mech.setField(set[property])
        if (property === "difficulty") {
          game.difficultyMode = Number(set[property])
          document.getElementById("difficulty-select").value = Number(set[property])
        }
        if (property === "level") {
          level.levelsCleared += Number(set[property]);
          level.difficultyIncrease(Number(set[property]) * game.difficultyMode) //increase difficulty based on modes
          spawn.setSpawnList(); //picks a couple mobs types for a themed random mob spawns
          level.onLevel++
        }
      }

      for (let i = 0; i < bullet.length; ++i) Matter.World.remove(engine.world, bullet[i]);
      bullet = []; //remove any bullets that might have spawned from mods
      if (b.inventory.length > 0) {
        b.activeGun = b.inventory[0] //set first gun to active gun
        game.makeGunHUD();
      }
      b.modOnHealthChange();
    }
  },
  pauseGrid() {
    let text = `
    <div class="pause-grid-module">
      <span style="font-size:1.5em;font-weight: 600;">PAUSED</span> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; press P to resume
    </div>
    <div class="pause-grid-module" style = "font-size: 13px;line-height: 120%;padding: 5px;">
      level: ${level.levelsCleared} - ${level.levels[level.onLevel]} (${level.difficultyText()})
      <br>${mob.length} mobs, &nbsp; ${body.length} blocks, &nbsp; ${bullet.length} bullets, &nbsp; ${powerUp.length} power ups
      <br>mouse: (${game.mouseInGame.x.toFixed(1)}, ${game.mouseInGame.y.toFixed(1)}) &nbsp; ${mech.cycle} cycles
      <br>
      <br>health: ${(mech.health*100).toFixed(0)}% &nbsp; energy: ${(mech.energy*100).toFixed(0)}% &nbsp; mass: ${player.mass.toFixed(1)}
      <br>position: (${player.position.x.toFixed(1)}, ${player.position.y.toFixed(1)}) &nbsp; velocity: (${player.velocity.x.toFixed(1)}, ${player.velocity.y.toFixed(1)})
    </div>`;

    let countGuns = 0
    let countMods = 0
    for (let i = 0, len = b.guns.length; i < len; i++) {
      if (b.guns[i].have) {
        text += `<div class="pause-grid-module"><div class="grid-title"><div class="circle-grid gun"></div> &nbsp; ${b.guns[i].name}</div> ${b.guns[i].description}</div>`
        countGuns++
      }
    }
    let el = document.getElementById("pause-grid-left")
    el.style.display = "grid"
    el.innerHTML = text

    text = "";
    text += `<div class="pause-grid-module"><div class="grid-title"><div class="circle-grid field"></div> &nbsp; ${mech.fieldUpgrades[mech.fieldMode].name}</div> ${mech.fieldUpgrades[mech.fieldMode].description}</div>`
    for (let i = 0, len = b.mods.length; i < len; i++) {
      if (b.mods[i].count > 0) {
        if (b.mods[i].count === 1) {
          text += `<div class="pause-grid-module"><div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[i].name}</div> ${b.mods[i].description}</div>`
        } else {
          text += `<div class="pause-grid-module"><div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[i].name} (${b.mods[i].count}x)</div> ${b.mods[i].description}</div>`
        }
        countMods++
      }
    }
    el = document.getElementById("pause-grid-right")
    el.style.display = "grid"
    el.innerHTML = text
    if (countMods > 5 || countGuns > 6) {
      document.body.style.overflowY = "scroll";
      document.body.style.overflowX = "hidden";
    }
  },
  unPauseGrid() {
    document.body.style.overflow = "hidden"
    document.getElementById("pause-grid-left").style.display = "none"
    document.getElementById("pause-grid-right").style.display = "none"
    window.scrollTo(0, 0);
  },
  isCustomSelection: true,
  choosePowerUp(who, index, type) {
    if (type === "gun") {
      let isDeselect = false
      for (let i = 0, len = b.inventory.length; i < len; i++) { //look for selection in inventory
        if (b.guns[b.inventory[i]].name === b.guns[index].name) { //if already clicked, remove gun
          isDeselect = true
          who.classList.remove("build-gun-selected");
          //remove gun
          b.inventory.splice(i, 1)
          b.guns[index].count = 0;
          b.guns[index].have = false;
          if (b.guns[index].ammo != Infinity) b.guns[index].ammo = 0;
          if (b.inventory.length === 0) b.activeGun = null;
          game.makeGunHUD();
          break
        }
      }
      if (!isDeselect) { //add gun
        who.classList.add("build-gun-selected");
        b.giveGuns(index)
      }
    } else if (type === "field") {
      if (mech.fieldMode !== index) {
        document.getElementById("field-" + mech.fieldMode).classList.remove("build-field-selected");
        mech.setField(index)
        who.classList.add("build-field-selected");
      }
    } else if (type === "mod") { //remove mod if you have too many
      if (b.mods[index].count < b.mods[index].maxCount) {
        if (!who.classList.contains("build-mod-selected")) who.classList.add("build-mod-selected");
        b.giveMod(index)
        // if (b.mods[index].count > 1) who.innerHTML = `<div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[index].name} (${b.mods[index].count}x)</div> ${b.mods[index].description}`
      } else {
        b.removeMod(index);
        // who.innerHTML = `<div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[index].name}</div> ${b.mods[index].description}`
        who.classList.remove("build-mod-selected");
      }
    }
    //update mod text //disable not allowed mods
    for (let i = 0, len = b.mods.length; i < len; i++) {
      const modID = document.getElementById("mod-" + i)

      if (b.mods[i].allowed()) {
        if (b.mods[i].count > 1) {
          modID.innerHTML = `<div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[i].name} (${b.mods[i].count}x)</div>${b.mods[i].description}</div>`
        } else {
          modID.innerHTML = `<div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[i].name}</div>${b.mods[i].description}</div>`
        }

        if (modID.classList.contains("build-grid-disabled")) {
          modID.classList.remove("build-grid-disabled");
          modID.setAttribute("onClick", `javascript: build.choosePowerUp(this,${i},'mod')`);
        }
      } else {
        modID.innerHTML = `<div class="grid-title"><div class="circle-grid grey"></div> &nbsp; ${b.mods[i].name}</div><span style="color:#666;"><strong>requires:</strong> ${b.mods[i].requires}</span></div>`
        if (!modID.classList.contains("build-grid-disabled")) {
          modID.classList.add("build-grid-disabled");
          modID.onclick = null
        }
        if (b.mods[i].count > 0) {
          b.removeMod(i)
        }
        if (modID.classList.contains("build-mod-selected")) {
          modID.classList.remove("build-mod-selected");
        }
      }
    }
  },
  populateGrid() {
    let text = `
  <div style="display: flex; justify-content: space-around; align-items: center;">
    <svg class="SVG-button" onclick="build.startBuildRun()" width="115" height="51">
      <g stroke='none' fill='#333' stroke-width="2" font-size="40px" font-family="Ariel, sans-serif">
        <text x="18" y="38">start</text>
      </g>
    </svg>
    <svg class="SVG-button" onclick="build.reset()" width="50" height="25">
      <g stroke='none' fill='#333' stroke-width="2" font-size="17px" font-family="Ariel, sans-serif">
        <text x="5" y="18">reset</text>
      </g>
    </svg>
    <svg class="SVG-button" onclick="build.shareURL()" width="52" height="25">
      <g stroke='none' fill='#333' stroke-width="2" font-size="17px" font-family="Ariel, sans-serif">
        <text x="5" y="18">share</text>
      </g>
    </svg>
  </div>
  <div style="align-items: center; text-align:center; font-size: 1.00em; line-height: 220%;background-color:#c4ccd8;">
    <div>starting level: <input id='starting-level' type="number" step="1" value="0" min="0" max="99"></div>
    <label for="difficulty-select" title="effects: number of mobs, damage done by mobs, damage done to mobs, mob speed, heal effects">difficulty:</label>
    <select name="difficulty-select" id="difficulty-select-custom">
      <option value="0">easy</option>
      <option value="1" selected>normal</option>
      <option value="2">hard</option>
      <option value="4">why...</option>
    </select>
  </div>`
    for (let i = 0, len = mech.fieldUpgrades.length; i < len; i++) {
      text += `<div id ="field-${i}" class="build-grid-module" onclick="build.choosePowerUp(this,${i},'field')"><div class="grid-title"><div class="circle-grid field"></div> &nbsp; ${mech.fieldUpgrades[i].name}</div> ${mech.fieldUpgrades[i].description}</div>`
    }
    for (let i = 0, len = b.guns.length; i < len; i++) {
      text += `<div class="build-grid-module" onclick="build.choosePowerUp(this,${i},'gun')"><div class="grid-title"><div class="circle-grid gun"></div> &nbsp; ${b.guns[i].name}</div> ${b.guns[i].description}</div>`
    }
    for (let i = 0, len = b.mods.length; i < len; i++) {
      if (!b.mods[i].allowed()) { // || b.mods[i].name === "+1 cardinality") { //|| b.mods[i].name === "leveraged investment"
        text += `<div id="mod-${i}" class="build-grid-module build-grid-disabled"><div class="grid-title"><div class="circle-grid grey"></div> &nbsp; ${b.mods[i].name}</div><span style="color:#666;"><strong>requires:</strong> ${b.mods[i].requires}</span></div>`
      } else if (b.mods[i].count > 1) {
        text += `<div id="mod-${i}" class="build-grid-module" onclick="build.choosePowerUp(this,${i},'mod')"><div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[i].name} (${b.mods[i].count}x)</div> ${b.mods[i].description}</div>`
      } else {
        text += `<div id="mod-${i}" class="build-grid-module" onclick="build.choosePowerUp(this,${i},'mod')"><div class="grid-title"><div class="circle-grid mod"></div> &nbsp; ${b.mods[i].name}</div> ${b.mods[i].description}</div>`
      }
    }
    document.getElementById("build-grid").innerHTML = text
    document.getElementById("difficulty-select-custom").value = document.getElementById("difficulty-select").value
    document.getElementById("difficulty-select-custom").addEventListener("input", () => {
      game.difficultyMode = Number(document.getElementById("difficulty-select-custom").value)
      localSettings.difficultyMode = Number(document.getElementById("difficulty-select-custom").value)
      document.getElementById("difficulty-select").value = document.getElementById("difficulty-select-custom").value
      localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
    });
    b.resetModText();
  },
  reset() {
    build.isCustomSelection = true;
    mech.setField(0)

    b.inventory = []; //removes guns and ammo  
    for (let i = 0, len = b.guns.length; i < len; ++i) {
      b.guns[i].count = 0;
      b.guns[i].have = false;
      if (b.guns[i].ammo != Infinity) b.guns[i].ammo = 0;
    }
    b.activeGun = null;
    game.makeGunHUD();

    b.setupAllMods();
    build.populateGrid();
    document.getElementById("field-0").classList.add("build-field-selected");
    document.getElementById("build-grid").style.display = "grid"
  },
  shareURL() {
    // Create a fake textarea
    const textAreaEle = document.createElement('textarea');

    // Reset styles
    textAreaEle.style.border = '0';
    textAreaEle.style.padding = '0';
    textAreaEle.style.margin = '0';

    // Set the absolute position
    // User won't see the element
    textAreaEle.style.position = 'absolute';
    textAreaEle.style.left = '-9999px';
    textAreaEle.style.top = `0px`;

    // Set the value
    textAreaEle.value = build.generateURL();

    // Append the textarea to body
    document.body.appendChild(textAreaEle);

    // Focus and select the text
    textAreaEle.focus();
    textAreaEle.select();

    // Execute the "copy" command
    try {
      document.execCommand('copy');
    } catch (err) {
      // Unable to copy
    } finally {
      // Remove the textarea
      document.body.removeChild(textAreaEle);
    }
    alert('n-gon build URL copied to clipboard.\nPaste into browser address bar.')
  },
  generateURL() {
    let url = "https://landgreen.github.io/sidescroller/index.html?"
    let count = 0;
    for (let i = 0; i < b.guns.length; i++) {
      if (b.guns[i].have) {
        url += `&gun${count}=${encodeURIComponent(b.guns[i].name.trim())}`
        count++
      }
    }
    count = 0;
    for (let i = 0; i < b.mods.length; i++) {
      for (let j = 0; j < b.mods[i].count; j++) {
        url += `&mod${count}=${encodeURIComponent(b.mods[i].name.trim())}`
        count++
      }
    }
    url += `&field=${encodeURIComponent(mech.fieldUpgrades[mech.fieldMode].name.trim())}`
    url += `&difficulty=${game.difficultyMode}`
    url += `&level=${Number(document.getElementById("starting-level").value)}`
    console.log(url)
    return url
  },
  startBuildRun() {
    build.isCustomSelection = false;
    b.modOnHealthChange()

    spawn.setSpawnList(); //gives random mobs,  not starter mobs
    spawn.setSpawnList();
    if (b.inventory.length > 0) {
      b.activeGun = b.inventory[0] //set first gun to active gun
      game.makeGunHUD();
    }

    for (let i = 0; i < bullet.length; ++i) Matter.World.remove(engine.world, bullet[i]);
    bullet = []; //remove any bullets that might have spawned from mods

    const levelsCleared = Number(document.getElementById("starting-level").value)
    level.difficultyIncrease(Math.min(99, levelsCleared * game.difficultyMode)) //increase difficulty based on modes
    level.levelsCleared += levelsCleared;

    document.body.style.cursor = "none";
    document.body.style.overflow = "hidden"
    document.getElementById("build-grid").style.display = "none"
    game.paused = false;
    requestAnimationFrame(cycle);
  }
}

document.getElementById("build-button").addEventListener("click", () => { //setup build run
  build.isURLBuild = false;
  document.getElementById("build-button").style.display = "none";
  const el = document.getElementById("build-grid")
  el.style.display = "grid"
  document.body.style.overflowY = "scroll";
  document.body.style.overflowX = "hidden";
  document.getElementById("info").style.display = 'none'

  level.isBuildRun = true;
  game.startGame(); //starts game, but pauses it
  build.isCustomSelection = true;
  game.paused = true;
  build.reset();
});


//  local storage
let localSettings = JSON.parse(localStorage.getItem("localSettings"));
// console.log(localSettings)
if (localSettings) {
  // game.isBodyDamage = localSettings.isBodyDamage
  // document.getElementById("body-damage").checked = localSettings.isBodyDamage

  game.isEasyToAimMode = localSettings.isEasyToAimMode
  document.getElementById("track-pad-mode").checked = localSettings.isEasyToAimMode

  game.isCommunityMaps = localSettings.isCommunityMaps
  document.getElementById("community-maps").checked = localSettings.isCommunityMaps

  game.difficultyMode = localSettings.difficultyMode
  document.getElementById("difficulty-select").value = localSettings.difficultyMode

  if (localSettings.fpsCapDefault === 'max') {
    game.fpsCapDefault = 999999999;
  } else {
    game.fpsCapDefault = Number(localSettings.fpsCapDefault)
  }
  document.getElementById("fps-select").value = localSettings.fpsCapDefault
} else {
  localSettings = {
    // isBodyDamage: true,
    isEasyToAimMode: false,
    isCommunityMaps: false,
    difficultyMode: '1',
    fpsCapDefault: 'max',
  };
  localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
  // document.getElementById("body-damage").checked = localSettings.isBodyDamage
  document.getElementById("track-pad-mode").checked = localSettings.isEasyToAimMode
  game.isEasyToAimMode = localSettings.isEasyToAimMode
  document.getElementById("community-maps").checked = localSettings.isEasyToAimMode
  game.isCommunityMaps = localSettings.isCommunityMaps
  document.getElementById("difficulty-select").value = localSettings.difficultyMode
  document.getElementById("fps-select").value = localSettings.fpsCapDefault
}

//set up canvas
var canvas = document.getElementById("canvas");
//using "const" causes problems in safari when an ID shares the same name.
const ctx = canvas.getContext("2d");
document.body.style.backgroundColor = "#fff";

//disable pop up menu on right click
document.oncontextmenu = function () {
  return false;
}

function setupCanvas() {
  canvas.width = window.innerWidth;
  canvas.height = window.innerHeight;
  canvas.width2 = canvas.width / 2; //precalculated because I use this often (in mouse look)
  canvas.height2 = canvas.height / 2;
  canvas.diagonal = Math.sqrt(canvas.width2 * canvas.width2 + canvas.height2 * canvas.height2);
  ctx.font = "15px Arial";
  ctx.lineJoin = "round";
  ctx.lineCap = "round";
  // ctx.lineCap='square';
  game.setZoom();
}
setupCanvas();
window.onresize = () => {
  setupCanvas();
};

//mouse move input
document.body.addEventListener("mousemove", (e) => {
  game.mouse.x = e.clientX;
  game.mouse.y = e.clientY;
});

document.body.addEventListener("mouseup", (e) => {
  // game.buildingUp(e); //uncomment when building levels
  // game.mouseDown = false;
  // console.log(e)
  if (e.which === 3) {
    game.mouseDownRight = false;
  } else {
    game.mouseDown = false;
  }
});

document.body.addEventListener("mousedown", (e) => {
  if (e.which === 3) {
    game.mouseDownRight = true;
  } else {
    game.mouseDown = true;
  }
});

document.body.addEventListener("mouseenter", (e) => { //prevents mouse getting stuck when leaving the window
  // game.mouseDown = false;
  // game.mouseDownRight = false;

  if (e.button === 1) {
    game.mouseDown = true;
  } else {
    game.mouseDown = false;
  }

  if (e.button === 3) {
    game.mouseDownRight = true;
  } else {
    game.mouseDownRight = false;
  }
});
document.body.addEventListener("mouseleave", (e) => { //prevents mouse getting stuck when leaving the window
  // game.mouseDown = false;
  // game.mouseDownRight = false;
  // console.log(e)
  if (e.button === 1) {
    game.mouseDown = true;
  } else {
    game.mouseDown = false;
  }

  if (e.button === 3) {
    game.mouseDownRight = true;
  } else {
    game.mouseDownRight = false;
  }
});

//keyboard input
const keys = [];
document.body.addEventListener("keydown", (e) => {
  keys[e.keyCode] = true;
  if (mech.alive) game.keyPress();
});

document.body.addEventListener("keyup", (e) => {
  keys[e.keyCode] = false;
});

document.body.addEventListener("wheel", (e) => {
  if (!game.paused) {
    if (e.deltaY > 0) {
      game.nextGun();
    } else {
      game.previousGun();
    }
  }
}, {
  passive: true
});

document.getElementById("fps-select").addEventListener("input", () => {
  let value = document.getElementById("fps-select").value
  if (value === 'max') {
    game.fpsCapDefault = 999999999;
  } else {
    game.fpsCapDefault = Number(value)
  }
  localSettings.fpsCapDefault = value
  localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
});

// document.getElementById("body-damage").addEventListener("input", () => {
//   game.isBodyDamage = document.getElementById("body-damage").checked
//   localSettings.isBodyDamage = game.isBodyDamage
//   localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
// });

document.getElementById("track-pad-mode").addEventListener("input", () => {
  game.isEasyToAimMode = document.getElementById("track-pad-mode").checked
  localSettings.isEasyToAimMode = game.isEasyToAimMode
  localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
});

document.getElementById("community-maps").addEventListener("input", () => {
  game.isCommunityMaps = document.getElementById("community-maps").checked
  localSettings.isCommunityMaps = game.isCommunityMaps
  localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
});

// difficulty-select-custom event listener is set in build.makeGrid
document.getElementById("difficulty-select").addEventListener("input", () => {
  game.difficultyMode = Number(document.getElementById("difficulty-select").value)
  localSettings.difficultyMode = game.difficultyMode
  localStorage.setItem("localSettings", JSON.stringify(localSettings)); //update local storage
});

//main loop ************************************************************
//**********************************************************************
game.loop = game.normalLoop;

function cycle() {
  if (!game.paused) requestAnimationFrame(cycle);
  const now = Date.now();
  const elapsed = now - game.then; // calc elapsed time since last loop
  if (elapsed > game.fpsInterval) { // if enough time has elapsed, draw the next frame
    game.then = now - (elapsed % game.fpsInterval); // Get ready for next frame by setting then=now.   Also, adjust for fpsInterval not being multiple of 16.67

    game.cycle++; //tracks game cycles
    mech.cycle++; //tracks player cycles  //used to alow time to stop for everything, but the player
    if (game.clearNow) {
      game.clearNow = false;
      game.clearMap();
      level.start();
    }

    game.loop();
    // if (isNaN(mech.health) || isNaN(mech.energy)) {
    //   console.log(`mech.health = ${mech.health}`)
    //   game.paused = true;
    //   game.replaceTextLog = true;
    //   build.pauseGrid()
    //   document.body.style.cursor = "auto";
    //   alert("health is NaN, please report this bug to the discord  \n https://discordapp.com/invite/2eC9pgJ")
    // }
    // for (let i = 0, len = loop.length; i < len; i++) {
    //   loop[i]()
    // }
  }
}