import type { ReactNode } from "react";
import { TFunction, i18n } from "i18next";
import { NavigateFunction } from "react-router";
import { AdminSidebar } from "~/application/sidebar/AdminSidebar";
import { SideBarItem } from "~/application/sidebar/SidebarItem";
import { getUserHasPermission } from "~/utils/helpers/PermissionsHelper";
import { AppLoaderData } from "~/utils/data/useAppData";
import { AppRootData } from "~/utils/data/useRootData";
import { getDocCommands } from "~/utils/services/docsService";
import { appPath } from "~/utils/app/CanonicalUrlUtils";
import { absoluteAdminPath, absoluteAppRootPath, isAbsoluteHttpUrl, type PublicDomainRoutingConfig } from "~/utils/app/CrossHostUrls";
import { filterCommandActions } from "~/services/search/commandSearch";
import { translateLabel } from "~/utils/i18n/translateLabel";

// Registry marker: services/command-registry paths are app-relative for package verification.
export type CommandRegistryLayout = "app" | "admin" | "docs";

export type CommandActionScope = {
  layout: CommandRegistryLayout;
  tenantSlug?: string;
  platform?: boolean;
  adminOnly?: boolean;
  featureFlag?: string;
  permission?: string;
};

export type CommandAction = {
  id: string;
  name: string;
  subtitle?: string;
  keywords?: string;
  shortcut?: string[];
  icon?: ReactNode;
  perform?: (currentAction: CommandAction) => void;
};

export type ScopedCommandAction = CommandAction & {
  scope: CommandActionScope;
};

export type CommandRegistryContext = {
  layout: CommandRegistryLayout;
  t: TFunction;
  i18n?: Pick<i18n, "exists">;
  navigate: NavigateFunction;
  submitLogout?: () => void;
  appData?: AppLoaderData;
  rootData?: AppRootData;
};

export function getCommandRegistryActions(context: CommandRegistryContext): ScopedCommandAction[] {
  const actions = getUnfilteredCommandRegistryActions(context);
  return filterCommandActions({
    actions,
    query: "",
    layout: context.layout,
    tenantSlug: context.appData?.currentTenant?.slug,
    appData: context.appData,
    rootData: context.rootData,
  });
}

function getUnfilteredCommandRegistryActions(context: CommandRegistryContext): ScopedCommandAction[] {
  if (context.layout === "app") {
    return getAppCommandActions(context);
  }
  if (context.layout === "admin") {
    return getAdminCommandActions(context);
  }
  return getDocsCommandActions(context);
}

function getAppCommandActions({ t, i18n, navigate, submitLogout, appData, rootData }: CommandRegistryContext): ScopedCommandAction[] {
  if (!appData || !rootData) {
    return [];
  }

  const tenantSlug = appData.currentTenant.slug;
  const tenantPath = (path?: string) => appPath({ tenantSlug, path, mode: "host-aware" });
  const tenantScope = (metadata?: Omit<CommandActionScope, "layout" | "tenantSlug">): CommandActionScope => ({ layout: "app", tenantSlug, ...metadata });
  const actions: ScopedCommandAction[] = [
    {
      id: "dashboard",
      shortcut: [],
      name: t("app.sidebar.dashboard"),
      keywords: "",
      scope: tenantScope(),
      perform: () => navigate(tenantPath("dashboard")),
    },
  ];

  appData.entities
    .filter((entity) => entity.showInSidebar)
    .forEach((entity) => {
      const permission = typeof entity.name === "string" && entity.name.trim() ? `entity.${entity.name}.view` : undefined;
      actions.push({
        id: "entity-" + entity.name,
        name: translateLabel(t, i18n, entity.titlePlural),
        scope: tenantScope({ permission }),
        perform: () => navigate(tenantPath(entity.slug)),
      });
    });

  actions.push({
    id: "profile",
    shortcut: [],
    name: t("app.commands.profile.title"),
    subtitle: t("app.sidebar.settings"),
    keywords: t("app.commands.profile.description"),
    scope: tenantScope(),
    perform: () => navigate(tenantPath("settings/profile")),
  });

  pushPermissionAction(actions, appData, "app.settings.members.view", {
    id: "members",
    name: t("app.navbar.members"),
    shortcut: [],
    keywords: "",
    subtitle: t("app.sidebar.settings"),
    scope: tenantScope({ permission: "app.settings.members.view" }),
    perform: () => navigate(tenantPath("settings/members")),
  });
  pushPermissionAction(actions, appData, "app.settings.subscription.view", {
    id: "subscription",
    name: t("app.navbar.subscription"),
    shortcut: [],
    keywords: "",
    subtitle: t("app.sidebar.settings"),
    scope: tenantScope({ permission: "app.settings.subscription.view" }),
    perform: () => navigate(tenantPath("settings/subscription")),
  });
  pushPermissionAction(actions, appData, "app.settings.account.view", {
    id: "account",
    name: t("app.navbar.tenant"),
    shortcut: [],
    keywords: "",
    subtitle: t("app.sidebar.settings"),
    scope: tenantScope({ permission: "app.settings.account.view" }),
    perform: () => navigate(tenantPath("settings/account")),
  });

  if (rootData.appConfiguration.app.features.tenantApiKeys) {
    pushPermissionAction(actions, appData, "app.settings.apiKeys.view", {
      id: "apiKeys",
      name: t("models.apiKey.plural"),
      shortcut: [],
      keywords: "",
      subtitle: t("app.sidebar.settings"),
      scope: tenantScope({ featureFlag: "tenantApiKeys", permission: "app.settings.apiKeys.view" }),
      perform: () => navigate(tenantPath("settings/api")),
    });
  }

  if (getUserHasPermission(appData, "app.settings.auditTrails.view")) {
    actions.push({
      id: "auditTrails",
      name: t("models.log.plural"),
      shortcut: [],
      keywords: "",
      subtitle: t("app.sidebar.settings"),
      scope: tenantScope({ permission: "app.settings.auditTrails.view" }),
      perform: () => navigate(tenantPath("settings/logs")),
    });
    actions.push({
      id: "events",
      name: t("models.event.plural"),
      shortcut: [],
      keywords: "",
      subtitle: t("app.sidebar.settings"),
      scope: tenantScope({ permission: "app.settings.auditTrails.view" }),
      perform: () => navigate(tenantPath("settings/logs/events")),
    });
  }

  if (appData.myTenants.length > 0) {
    actions.push({
      id: "switch account",
      shortcut: [],
      name: t("app.commands.tenants.switch"),
      keywords: t("app.commands.tenants.description"),
      scope: { layout: "app", platform: true },
      perform: () => navigateOrAssign(absoluteAppRootPath(rootData.routing), navigate),
    });
  }
  actions.push({
    id: "create account",
    shortcut: [],
    name: t("app.commands.tenants.create"),
    keywords: "",
    scope: { layout: "app", platform: true },
    perform: () => navigateOrAssign(absolutePublicAppPath(rootData.routing, "new-account"), navigate),
  });
  if (appData.user?.admin) {
    actions.push({
      id: "switch to admin",
      shortcut: [],
      name: t("admin.switchToAdmin"),
      keywords: "",
      scope: { layout: "app", platform: true, adminOnly: true },
      perform: () => navigateOrAssign(absoluteAdminPath(rootData.routing, "dashboard"), navigate),
    });
  }
  actions.push({
    id: "logout",
    shortcut: [],
    name: t("app.commands.profile.logout"),
    scope: { layout: "app", platform: true },
    perform: () => submitLogout?.(),
  });
  return actions;
}

function pushPermissionAction(actions: ScopedCommandAction[], appData: AppLoaderData, permission: string, action: ScopedCommandAction) {
  if (getUserHasPermission(appData, permission as never)) {
    actions.push(action);
  }
}

function getAdminCommandActions({ t, navigate, submitLogout, rootData }: CommandRegistryContext): ScopedCommandAction[] {
  if (!rootData) {
    return [];
  }

  const actions = getSidebarCommandActions(AdminSidebar({ t, appConfiguration: rootData.appConfiguration, routing: rootData.routing }), "admin").map(
    (action) => ({
      ...action,
      perform(currentAction: CommandAction) {
        navigateOrAssign(currentAction.id, navigate);
      },
    })
  );
  actions.push({
    id: "create account",
    shortcut: [],
    name: t("app.commands.tenants.create"),
    keywords: "",
    scope: { layout: "admin", platform: true },
    perform: () => navigateOrAssign(absolutePublicAppPath(rootData.routing, "new-account"), navigate),
  });
  actions.push({
    id: "logout",
    shortcut: [],
    name: t("app.commands.profile.logout"),
    scope: { layout: "admin", platform: true },
    perform: () => submitLogout?.(),
  });
  return actions;
}

function navigateOrAssign(target: string, navigate: NavigateFunction) {
  if (isAbsoluteHttpUrl(target) && typeof window !== "undefined") {
    window.location.assign(target);
    return;
  }
  navigate(target);
}

function absolutePublicAppPath(routing: PublicDomainRoutingConfig | undefined, path: string) {
  const appRoot = absoluteAppRootPath(routing);
  const cleanPath = path.replace(/^\/+/, "");
  if (isAbsoluteHttpUrl(appRoot)) {
    return new URL(cleanPath, appRoot).toString();
  }
  return `/${cleanPath}`;
}

function getDocsCommandActions({ navigate }: CommandRegistryContext): ScopedCommandAction[] {
  return getDocCommands().map((action) => ({
    ...action,
    scope: { layout: "docs", platform: true },
    perform(currentAction) {
      navigate(currentAction.id);
    },
  }));
}

export function getSidebarCommandActions(items: SideBarItem[], layout: CommandRegistryLayout): ScopedCommandAction[] {
  const commands: ScopedCommandAction[] = [];
  items.forEach((item) => commands.push(...getCommandsFromSidebarItem(item, layout, [], [])));
  return commands;
}

function getCommandsFromSidebarItem(item: SideBarItem, layout: CommandRegistryLayout, commands: ScopedCommandAction[], parent: string[]) {
  if (item.hidden || item.disabled) {
    return commands;
  }
  const isExpandableOnlyParent = item.isCollapsible && item.items && item.items.length > 0;
  if (item.path && item.title && !isExpandableOnlyParent) {
    let description = item.description ?? "";
    const parentTitles = parent.filter((value) => value);
    if (parentTitles.length > 0) {
      description = parentTitles.join(" / ");
    }
    commands.push({
      id: item.path,
      name: item.title,
      shortcut: [],
      subtitle: description,
      scope: { layout, platform: true, adminOnly: layout === "admin", permission: item.permission },
    });
  }
  item.items?.forEach((subItem) => getCommandsFromSidebarItem(subItem, layout, commands, [...parent, item.title]));
  return commands;
}