var hell = {

    // Variables
    
    size : 45,
    lavaLakeStep : 0,
    buffers : [[], [], [], [], [], [], []], // The three things buffers
    bufferPosition : 1, // On which buffer is the character (at first in the middle buffer)
    timeSpent : 0, // Increase each cycle
    addRockStep : 0,
    monstersGap : 7, // Gap between the devil and appearing monsters
    step : 0,

    // Functions
    
    onload : function(){
        land.addLand("Hell", this.size, 6, this.load.bind(this), this.getText.bind(this), this.move.bind(this));
    },
    
    move : function(){
        // We increase the lava lake step
        this.lavaLakeStep += 1;
        if(this.lavaLakeStep == 12){
            this.lavaLakeStep = 0;
        }
        
        // We make things move
        for(var i = 0; i < 7; i++){
            if(i != this.bufferPosition){
                if(this.buffers[i][0].type == "mob") this.buffers[i][0] = quest.makeNoneThing();
                for(var j = 1; j < this.size - 1; j++){
                    if(this.buffers[i][j].type == "mob" && this.buffers[i][j-1].type == "none" && this.buffers[i][j].text != " * " && this.buffers[i][j].text != "|-|"){
                        this.buffers[i][j-1] = this.buffers[i][j];
                        this.buffers[i][j] = quest.makeNoneThing();
                    }
                }
                // Clone
                for(var j = this.size-2; j >= 0; j--){
                    if(this.buffers[i][j].text == "\\o/" && this.buffers[i][j].type == "ally" && this.buffers[i][j+1].type == "none" && this.buffers[i][j].text != " * " && this.buffers[i][j].text != "|-|"){
                        this.buffers[i][j+1] = this.buffers[i][j];
                        this.buffers[i][j] = quest.makeNoneThing();
                    }
                }
            }
            else{
                if(quest.things[0].type == "mob") quest.things[0] = quest.makeNoneThing();
                for(var j = 1; j < this.size - 1; j++){
                    if(quest.things[j].type == "mob" && quest.things[j-1].type == "none" && quest.things[j].text != " * " && quest.things[j].text != "|-|"){
                        quest.things[j-1] = quest.things[j];
                        quest.things[j] = quest.makeNoneThing();
                    }
                }
            }
        }
        
        // We check the steps
        switch(this.step){
            case 0: this.checkStep1(); break;
            case 1: this.checkStep2(); break;
            case 2: this.checkStep3(); break;
            case 3: this.checkStep4(); break;
        }
        
        // We add ennemies in the middle buffers
        for(var i = 2; i < 5; i++){
            if(i != this.bufferPosition && this.buffers[i][this.size-this.monstersGap].type == "none"){
                this.buffers[i][this.size-this.monstersGap] = this.makeMiddleCreature();
            }
            else if(i == this.bufferPosition && quest.things[this.size-this.monstersGap].type == "none"){
                quest.things[this.size-this.monstersGap] = this.makeMiddleCreature();
            }
        }
        
        // Idem in the side buffers
        for(var i = 0; i < 2; i++){
            if(i != this.bufferPosition && this.buffers[i][this.size-this.monstersGap].type == "none"){
                this.buffers[i][this.size-this.monstersGap] = this.makeSideCreature();
            }
            else if(i == this.bufferPosition && quest.things[this.size-this.monstersGap].type == "none"){
                quest.things[this.size-this.monstersGap] = this.makeSideCreature();
            }
        }
        
        for(var i = 5; i < 7; i++){
            if(i != this.bufferPosition && this.buffers[i][this.size-this.monstersGap].type == "none"){
                this.buffers[i][this.size-this.monstersGap] = this.makeSideCreature();
            }
            else if(i == this.bufferPosition && quest.things[this.size-this.monstersGap].type == "none"){
                quest.things[this.size-this.monstersGap] = this.makeSideCreature();
            }
        }
        
        // We increase the time spent
        this.timeSpent += 1;
    },
    
    load : function(){
        // We set the first buffer position
        this.bufferPosition = 3;
        
        // We fill buffers
        for(var i = 0; i < 7; i++){
            if(i != this.bufferPosition){
               this.buffers[i] = quest.fillWithNoneThings();
            }
        }
        
        // We add the devil
        quest.things[this.size - 1] = this.makeDevil();
        
        // We add first doors
        quest.things[this.size - 4] = this.makeDoor();
        for(var i = 0; i < 7; i++){
            if(i != 3) this.buffers[i][this.size - 4] = this.makeDoor();
        }
        
        // We add second doors
        quest.things[this.size - 6] = this.makeSpikyDoor();
        for(var i = 0; i < 7; i++){
            if(i != 3 && i != 5) this.buffers[i][this.size - 6] = this.makeSpikyDoor();
        }
        this.buffers[5][this.size - 6] = this.makeDoor();
        
        // We add teleporting gates
        quest.things[this.size - 3] = this.makeTeleportingGate();
        quest.things[this.size - 5] = this.makeTeleportingGate();
        for(var i = 0; i < 7; i++){
            if(i != 3){
                this.buffers[i][this.size - 3] = this.makeTeleportingGate();
                this.buffers[i][this.size - 5] = this.makeTeleportingGate();
            }
        }
        
        // We set the steps
        this.addRockStep = 0;
        this.step = 0;
        
        // We set the time spent
        this.timeSpent = 0;
    },
    
    teleportCharacter : function(gatesIndex){
        var index = quest.getCharacterIndex();
        
        quest.things[0] = quest.things[index];
        quest.things[index] = quest.makeNoneThing();
        
        quest.things[gatesIndex] = quest.makeNoneThing();
        for(var i = 0; i < 7; i++){
            if(i != this.bufferPosition){
                this.buffers[i][gatesIndex] = quest.makeNoneThing();
            }
        }
    },
    
    checkStep1 : function(){
        var index = quest.getCharacterIndex();
        
        if(index >= this.size - 7) this.step = 1;
    },
    
    checkStep2 : function(){
        for(var i = 0; i < 7; i++){
            if((i != this.bufferPosition && this.buffers[i][this.size-5].text != " * ") || (i == this.bufferPosition && quest.things[this.size-5].text != " * ")){
                this.teleportCharacter(this.size-5);
                this.step = 2;
                break;
            }
        }
    },
    
    checkStep3 : function(){
        var index = quest.getCharacterIndex();
        
        if(index >= this.size - 5) this.step = 3;
    },
    
    checkStep4 : function(){
        for(var i = 0; i < 7; i++){
            if((i != this.bufferPosition && this.buffers[i][this.size-3].text != " * ") || (i == this.bufferPosition && quest.things[this.size-3].text != " * ")){
                this.teleportCharacter(this.size-3);
                this.step = 4;
                this.timeSpent = 0;
                break;
            }
        }
    },
    
    goDown : function(){
        var pos = this.bufferPosition;
        
        // If we're questing the hell
        if(quest.weAreQuestingRightNow && land.getLandIndexFromName("Hell") == quest.currentLandIndex){
            // If we're not already at the buffer 2
            if(this.bufferPosition != 6){
                // If we were able to swap, change the buffer position
                if(this.swapBufferAndQuestThings(pos, pos + 1)){
                    this.bufferPosition += 1;
                    this.checkDevil();
                    quest.updateOnPage();
                }
            }
        }
    },
    
    goUp : function(){
        var pos = this.bufferPosition;
        
        // If we're questing the hell
        if(quest.weAreQuestingRightNow && land.getLandIndexFromName("Hell") == quest.currentLandIndex){
            // If we're not already at the buffer 0
            if(this.bufferPosition != 0){
                // If we were able to swap, change the buffer position
                if(this.swapBufferAndQuestThings(pos, pos - 1)){
                    this.bufferPosition -= 1;
                    this.checkDevil();
                    quest.updateOnPage();
                }
            }
        }
    },
    
    swapBufferAndQuestThings : function(now, after){
        var index = quest.getCharacterIndex();
        var character = quest.things[index];

        // If we will be able to move on the "after" buffer, we swap (if we have some hp, too)
        if(this.buffers[after][index].type == "none" && character.hp > 0){
            // We save the quest things in the old buffer
            this.buffers[now] = quest.things.slice(0);
            // We delete the character from the old buffer
            this.buffers[now][index] = quest.makeNoneThing();
            // We put the new buffer into the quest things
            quest.things = this.buffers[after].slice(0);
            // We add the character
            quest.things[index] = character;
            // We return true
            return true;
        }

        // Else we return false
        return false;
    },
    
    checkDevil : function(){
        // If the devil isn't on the line of the character
        if(quest.things[this.size-1].text != "DEV"){
            // We move it
            for(var i = 0; i < 7; i++){
                if(i != this.bufferPosition && this.buffers[i][this.size-1].text == "DEV"){
                    quest.things[this.size-1] = this.buffers[i][this.size-1];
                    this.buffers[i][this.size-1] = quest.makeNoneThing();
                    break;
                }
            }
        }
    },
    
    makeDevil : function(){
        return land.createMob("DEV", 250, 250, "religion", "It's the devil itself !", [drops.createDrop("candies", 100000)]);
    },
    
    makeTeleportingGate : function(){
        return land.createMob(" * ", 120, 120, "none", "A teleporting gate, made by the devil itself.", []);
    },
    
    makeMiddleCreature : function(){
        switch(this.step){
            case 0:
                if(random.oneChanceOutOf(3)){
                    return this.makeDemon();
                }
            break;
            case 2:
                if(random.oneChanceOutOf(4)){
                    return this.makeBanshee();
                }
            break;
            case 3:
                if(random.oneChanceOutOf(3)){
                    return castleKeep.makeFireball();
                }
            break;
            case 4:
                if(this.timeSpent < 50 && this.timeSpent % 2 == 0){
                    return castleStairs.makeGhost();
                }
                else if(this.timeSpent < 70){
                    // nothing
                }
                else if(this.timeSpent < 90){
                    if(random.oneChanceOutOf(5)){
                        return castleKeep.makeFireball();
                    }
                }
                else if(this.timeSpent < 110){
                    if(random.oneChanceOutOf(4)){
                        return castleKeep.makeFireball();
                    }
                }
                else if(this.timeSpent < 130){
                    if(random.oneChanceOutOf(3)){
                        return castleKeep.makeFireball();
                    }
                }
                else if(this.timeSpent < 170){
                    if(random.oneChanceOutOf(2)){
                        return castleKeep.makeFireball();
                    }
                }
                else{
                    return castleKeep.makeFireball();
                }
            break;
        }
        
        return quest.makeNoneThing();
    },
    
    makeSideCreature : function(){
        switch(this.step){
            case 0:
                return this.makeMiddleCreature();
            break;
            case 2:
                if(random.oneChanceOutOf(5)){
                    return castleStairs.makeGhost();
                }
            break;
            case 3:
                if(random.oneChanceOutOf(4)){} // nothing
                else{
                    return castleStairs.makeGhost();
                }
            break;
            case 4:
                return this.makeMiddleCreature();
            break;
        }
        
        return quest.makeNoneThing();
    },
    
    makeDemon : function(){
        return land.createMob("DEM", 90, 90, "demon claws", "A demon.", []);
    },
    
    makeBanshee : function(){
        return land.createMob("BSH", 160, 160, "?", "A banshee, omen of death.", []);
    },
    
    makeDoor : function(){
        return land.createMob("|-|", 300, 300, "none", "A strong door. Hard to break.", []);
    },
    
    makeSpikyDoor : function(){
        return land.createMob("|-|", 300, 300, "spikes", "A strong door. Hard to break. There are spikes on it, it hurts !", []);
    },
    
    getText : function(){
        // Create the text var
        var text = "";

        // Add the i & k instructions
        text += "<span style=\"color:red;\"><b>Press i to go up and k to go down.</b></span> (if it doesn't work, click on the page to gain focus)";
        
        text += "\n";
        
        // Open the span
        text += "<span style=\"font-size:10px;\">";
        
        text += "\n";
        
        // We add buffers
        for(var i = 0; i < 7; i++){
            if(i != this.bufferPosition){
                for(var j = 0; j < this.size; j++){
                    if(this.buffers[i][j].type != "none"){
                        text += this.buffers[i][j].text;
                    }
                    else text += "   ";
                }
            }
            else{
                for(var j = 0; j < this.size; j++){
                    if(quest.things[j].type != "none"){
                        text += quest.things[j].text;
                    }
                    else text += "   ";
                }
            }
        
            text += "\n";
        }
        
        // We make the lava lake
        for(var i = 0; i < Math.floor(this.size/2); i++){
            switch(this.lavaLakeStep){
                case 0: case 1: text += "_.-'-."; break;
                case 2: case 3: text += "._.-'-"; break;
                case 4: case 5: text += "-._.-'"; break;
                case 6: case 7: text += "'-._.-"; break;
                case 8: case 9: text += "-'-._."; break;
                case 10: case 11: text += ".-'-._"; break;
            }
        }
        
        // Close the span
        text += "</span>"
        
        return text;
    }

};