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

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

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.common.ActuallyAdditions;
import de.ellpeck.actuallyadditions.common.booklet.misc.BookletUtils;
import de.ellpeck.actuallyadditions.common.booklet.page.ItemDisplay;
import de.ellpeck.actuallyadditions.common.inventory.gui.TexturedButton;
import de.ellpeck.actuallyadditions.common.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;

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

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

        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();
        }
    }
}