/*
 * This file ("GuiPage.java") is part of the Actually Additions mod for Minecraft.
 * It is created and owned by Ellpeck and distributed
 * under the Actually Additions License to be found at
 * http://ellpeck.de/actaddlicense
 * View the source code at https://github.com/Ellpeck/ActuallyAdditions
 *
 * © 2015-2017 Ellpeck
 */

package de.ellpeck.actuallyadditions.mod.booklet.gui;

import de.ellpeck.actuallyadditions.api.booklet.IBookletChapter;
import de.ellpeck.actuallyadditions.api.booklet.IBookletPage;
import de.ellpeck.actuallyadditions.api.booklet.internal.GuiBookletBase;
import de.ellpeck.actuallyadditions.mod.ActuallyAdditions;
import de.ellpeck.actuallyadditions.mod.booklet.misc.BookletUtils;
import de.ellpeck.actuallyadditions.mod.booklet.page.ItemDisplay;
import de.ellpeck.actuallyadditions.mod.inventory.gui.TexturedButton;
import de.ellpeck.actuallyadditions.mod.util.StringUtil;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.GuiScreen;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.item.ItemStack;
import net.minecraft.util.text.TextFormatting;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

import java.awt.*;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@SideOnly(Side.CLIENT)
public class GuiPage extends GuiBooklet{

    public final IBookletPage[] pages = new IBookletPage[2];
    private final List<ItemDisplay> itemDisplays = new ArrayList<ItemDisplay>();
    private int pageTimer;

    private GuiButton buttonViewOnline;

    public GuiPage(GuiScreen previousScreen, GuiBookletBase parentPage, IBookletPage page1, IBookletPage page2){
        super(previousScreen, parentPage);

        this.pages[0] = page1;
        this.pages[1] = page2;
    }

    @Override
    public void mouseClicked(int mouseX, int mouseY, int mouseButton) throws IOException{
        super.mouseClicked(mouseX, mouseY, mouseButton);

        for(ItemDisplay display : this.itemDisplays){
            display.onMousePress(mouseButton, mouseX, mouseY);
        }

        for(IBookletPage page : this.pages){
            if(page != null){
                page.mouseClicked(this, mouseX, mouseY, mouseButton);
            }
        }
    }

    @Override
    public void mouseReleased(int mouseX, int mouseY, int state){
        super.mouseReleased(mouseX, mouseY, state);

        for(IBookletPage page : this.pages){
            if(page != null){
                page.mouseReleased(this, mouseX, mouseY, state);
            }
        }
    }

    @Override
    public void mouseClickMove(int mouseX, int mouseY, int clickedMouseButton, long timeSinceLastClick){
        super.mouseClickMove(mouseX, mouseY, clickedMouseButton, timeSinceLastClick);

        for(IBookletPage page : this.pages){
            if(page != null){
                page.mouseClickMove(this, mouseX, mouseY, clickedMouseButton, timeSinceLastClick);
            }
        }
    }

    @Override
    public void actionPerformed(GuiButton button) throws IOException{
        if(button == this.buttonViewOnline){
            List<String> links = this.getWebLinks();
            if(Desktop.isDesktopSupported()){
                for(String link : links){
                    try{
                        Desktop.getDesktop().browse(new URI(link));
                    }
                    catch(Exception e){
                        ActuallyAdditions.LOGGER.error("Couldn't open website from Booklet page!", e);
                    }
                }
            }
        }
        else{
            super.actionPerformed(button);

            for(IBookletPage page : this.pages){
                if(page != null){
                    page.actionPerformed(this, button);
                }
            }
        }
    }

    @Override
    public void initGui(){
        this.itemDisplays.clear();
        super.initGui();

        List<String> links = this.getWebLinks();
        if(links != null && !links.isEmpty()){
            this.buttonViewOnline = new TexturedButton(RES_LOC_GADGETS, -782822, this.guiLeft+this.xSize-24, this.guiTop+this.ySize-25, 0, 172, 16, 16, Collections.singletonList(TextFormatting.GOLD+StringUtil.localize("booklet."+ActuallyAdditions.MODID+".onlineButton.name")));
            this.buttonList.add(this.buttonViewOnline);
        }

        for(int i = 0; i < this.pages.length; i++){
            IBookletPage page = this.pages[i];
            if(page != null){
                page.initGui(this, this.guiLeft+6+i*142, this.guiTop+7);
            }
        }
    }

    private List<String> getWebLinks(){
        List<String> links = new ArrayList<String>();

        for(IBookletPage page : this.pages){
            if(page != null){
                String link = page.getWebLink();
                if(link != null && !links.contains(link)){
                    links.add(link);
                }
            }
        }

        return links;
    }

    @Override
    public void updateScreen(){
        super.updateScreen();

        for(int i = 0; i < this.pages.length; i++){
            IBookletPage page = this.pages[i];
            if(page != null){
                page.updateScreen(this, this.guiLeft+6+i*142, this.guiTop+7, this.pageTimer);
            }
        }

        this.pageTimer++;
    }

    @Override
    public void drawScreenPre(int mouseX, int mouseY, float partialTicks){
        super.drawScreenPre(mouseX, mouseY, partialTicks);

        if(this.pages[0] != null){
            IBookletChapter chapter = this.pages[0].getChapter();
            String name = chapter.getLocalizedName();
            this.fontRenderer.drawString(name, this.guiLeft+this.xSize/2-this.fontRenderer.getStringWidth(name)/2, this.guiTop-1, 0xFFFFFF, true);
        }

        for(int i = 0; i < this.pages.length; i++){
            IBookletPage page = this.pages[i];
            if(page != null){
                IBookletChapter chapter = this.pages[i].getChapter();
                String pageStrg = "Page "+(chapter.getPageIndex(this.pages[i])+1)+"/"+chapter.getAllPages().length;
                this.renderScaledAsciiString(pageStrg, this.guiLeft+25+i*136, this.guiTop+this.ySize-7, 0xFFFFFF, false, this.getLargeFontSize());

                GlStateManager.color(1F, 1F, 1F);
                page.drawScreenPre(this, this.guiLeft+6+i*142, this.guiTop+7, mouseX, mouseY, partialTicks);
            }
        }
        for(ItemDisplay display : this.itemDisplays){
            display.drawPre();
        }
    }

    @Override
    public void drawScreenPost(int mouseX, int mouseY, float partialTicks){
        super.drawScreenPost(mouseX, mouseY, partialTicks);

        for(int i = 0; i < this.pages.length; i++){
            IBookletPage page = this.pages[i];
            if(page != null){
                GlStateManager.color(1F, 1F, 1F);
                page.drawScreenPost(this, this.guiLeft+6+i*142, this.guiTop+7, mouseX, mouseY, partialTicks);
            }
        }
        for(ItemDisplay display : this.itemDisplays){
            display.drawPost(mouseX, mouseY);
        }
    }

    @Override
    public void addOrModifyItemRenderer(ItemStack renderedStack, int x, int y, float scale, boolean shouldTryTransfer){
        for(ItemDisplay display : this.itemDisplays){
            if(display.x == x && display.y == y && display.scale == scale){
                display.stack = renderedStack;
                return;
            }
        }

        this.itemDisplays.add(new ItemDisplay(this, x, y, scale, renderedStack, shouldTryTransfer));
    }

    @Override
    public boolean hasPageLeftButton(){
        IBookletPage page = this.pages[0];
        if(page != null){
            IBookletChapter chapter = page.getChapter();
            if(chapter != null){
                return chapter.getPageIndex(page) > 0;
            }
        }
        return false;
    }

    @Override
    public void onPageLeftButtonPressed(){
        IBookletPage page = this.pages[0];
        if(page != null){
            IBookletChapter chapter = page.getChapter();
            if(chapter != null){
                IBookletPage[] pages = chapter.getAllPages();

                int pageNumToOpen = chapter.getPageIndex(page)-1;
                if(pageNumToOpen >= 0 && pageNumToOpen < pages.length){
                    this.mc.displayGuiScreen(BookletUtils.createPageGui(this.previousScreen, this.parentPage, pages[pageNumToOpen]));
                }
            }
        }
    }

    @Override
    public boolean hasPageRightButton(){
        IBookletPage page = this.pages[1];
        if(page != null){
            IBookletChapter chapter = page.getChapter();
            if(chapter != null){
                int pageIndex = chapter.getPageIndex(page);
                int pageAmount = chapter.getAllPages().length;
                return pageIndex+1 < pageAmount;
            }
        }
        return false;
    }

    @Override
    public void onPageRightButtonPressed(){
        IBookletPage page = this.pages[1];
        if(page != null){
            IBookletChapter chapter = page.getChapter();
            if(chapter != null){
                IBookletPage[] pages = chapter.getAllPages();

                int pageNumToOpen = chapter.getPageIndex(page)+1;
                if(pageNumToOpen >= 0 && pageNumToOpen < pages.length){
                    this.mc.displayGuiScreen(BookletUtils.createPageGui(this.previousScreen, this.parentPage, pages[pageNumToOpen]));
                }
            }
        }
    }

    @Override
    public boolean hasBackButton(){
        return true;
    }

    @Override
    public void onBackButtonPressed(){
        if(!isShiftKeyDown()){
            this.mc.displayGuiScreen(this.parentPage);
        }
        else{
            super.onBackButtonPressed();
        }
    }
}