import { MenuEntry } from "@islands/KMenu/types.ts";
import { debounce } from "@lib/helpers.ts";
import { getCookie } from "@lib/string.ts";
import { BookResource } from "@lib/marka/schema.ts";

interface HardcoverBook {
  id: string;
  slug: string;
  title: string;
  subtitle?: string;
  author_names: string[];
  series_names?: string[];
  release_year?: string;
  image?: string;
}

export const createNewBook: MenuEntry = {
  title: "Create new book",
  meta: "",
  icon: "IconSquareRoundedPlus",
  cb: (state) => {
    state.menus["input_book"] = {
      title: "Search",
      entries: [],
    };

    state.menus["loading"] = {
      title: "Search",
      entries: [
        {
          title: "Loading",
          icon: "IconLoader2",
          cb() {},
        },
      ],
    };

    state.activeMenu.value = "input_book";
    state.activeState.value = "normal";

    let currentQuery: string;
    const search = debounce(async function search(query: string) {
      try {
        currentQuery = query;
        if (query.length < 2) {
          state.menus["input_book"] = {
            title: "Search",
            entries: [
              {
                title: "Type at least 2 characters...",
                cb: () => {},
              },
            ],
          };
          state.activeMenu.value = "input_book";
          return;
        }

        const response = await fetch("/api/hardcover/query?q=" + encodeURIComponent(query));

        if (!response.ok) {
          throw new Error(await response.text());
        }

        const books = await response.json() as HardcoverBook[];

        if (query !== currentQuery) return;

        if (books.length === 0) {
          state.menus["input_book"] = {
            title: "Search",
            entries: [
              {
                title: "No results found",
                cb: () => {},
              },
            ],
          };
        } else {
          state.menus["input_book"] = {
            title: "Search",
            entries: books.map((b) => {
              return {
                title: `${b.title}${b.release_year ? ` (${b.release_year})` : ""}${b.author_names?.length ? ` - ${b.author_names.join(", ")}` : ""}`,
                  cb: async () => {
                  try {
                    state.activeState.value = "loading";
                    const response = await fetch("/api/books/" + b.id, {
                      method: "POST",
                    });
                    if (!response.ok) {
                      throw new Error(await response.text());
                    }
                    const book = await response.json() as BookResource;
                    unsub();
                    globalThis.location.href = "/books/" + book.name;
                  } catch (_e: unknown) {
                    state.activeState.value = "error";
                    state.loadingText.value = _e instanceof Error ? _e.message : "Unknown error";
                  }
                },
              };
            }),
          };
        }
        state.activeMenu.value = "input_book";
      } catch (_e: unknown) {
        state.activeState.value = "error";
        state.loadingText.value = _e instanceof Error ? _e.message : "Unknown error";
      }
    }, 500);

    const unsub = state.commandInput.subscribe((value) => {
      if (!value) {
        state.menus["input_book"] = {
          title: "Search",
          entries: [],
        };
        state.activeMenu.value = "input_book";
        return;
      }
      state.activeMenu.value = "loading";
      search(value);
    });
  },
  visible: () => {
    if (!getCookie("session_cookie")) return false;
    if (
      !globalThis?.location?.pathname?.includes("book") &&
      globalThis?.location?.pathname !== "/"
    ) return false;
    return true;
  },
};