package io.gitlab.jfronny.inceptum.frontend.gui.control;

import imgui.ImGui;
import imgui.flag.ImGuiTableFlags;
import io.gitlab.jfronny.inceptum.Inceptum;
import io.gitlab.jfronny.inceptum.InceptumGui;
import io.gitlab.jfronny.inceptum.frontend.gui.window.edit.InstanceEditWindow;
import io.gitlab.jfronny.inceptum.model.inceptum.InstanceMeta;
import io.gitlab.jfronny.inceptum.util.InstanceLauncher;
import io.gitlab.jfronny.inceptum.util.InstanceLock;
import io.gitlab.jfronny.inceptum.util.Utils;
import io.gitlab.jfronny.inceptum.util.cache.CachingGsonFile;
import io.gitlab.jfronny.inceptum.util.install.Steps;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class InstanceView {
    private static final Map<Path, CachingGsonFile<InstanceMeta>> metas = new HashMap<>();

    public static void draw(List<Path> paths) {
        if (ImGui.beginTable("Instances", 2, ImGuiTableFlags.SizingFixedFit | ImGuiTableFlags.Borders)) {
            for (Path path : paths) {
                if (InstanceLock.isSetupLocked(path)) {
                    ImGui.tableNextColumn();
                    ImGui.text("Setting up");
                    ImGui.tableNextColumn();
                    ImGui.text("This instance is currently being set up");
                    continue;
                }
                if (!Files.exists(path.resolve("instance.json"))) {
                    Utils.LOGGER.error("Invalid instance (doesn't contain instance.json): " + path);
                    continue;
                }
                InstanceMeta instance;
                try {
                    if (!metas.containsKey(path)) metas.put(path, new CachingGsonFile<>(path.resolve("instance.json"), InstanceMeta.class));
                    instance = metas.get(path).get();
                } catch (IOException e) {
                    Utils.LOGGER.error("Could not load instance.json", e);
                    continue;
                }
                ImGui.tableNextColumn();
                boolean runDisabled = false;
                try {
                    if (InstanceLock.isRunningLocked(path))
                        runDisabled = true;
                } catch (IOException e) {
                    continue;
                }
                if (runDisabled) ImGui.beginDisabled();
                if (ImGui.button(path.getFileName().toString())) {
                    try {
                        Steps.reDownload(path, Steps.createProcessState());
                    } catch (IOException e) {
                        Utils.LOGGER.error("Could not redownload instance, trying to start anyways", e);
                    }
                    InstanceLauncher.launchClient(path, instance);
                }
                if (runDisabled) ImGui.endDisabled();
                ImGui.tableNextColumn();
                if (ImGui.button("Edit##" + path)) {
                    try {
                        InceptumGui.open(new InstanceEditWindow(path, instance));
                    } catch (IOException e) {
                        Utils.LOGGER.error("Could not open instance edit window", e);
                    }
                }
            }
            ImGui.endTable();
        }
    }
}