import dayjs from "dayjs";
import { observer } from "mobx-react-lite";
import { useMemo } from "react";
import MemoView from "@/components/MemoView";
import PagedMemoList from "@/components/PagedMemoList";
import useCurrentUser from "@/hooks/useCurrentUser";
import { viewStore, userStore } from "@/store";
import memoFilterStore from "@/store/memoFilter";
import { State } from "@/types/proto/api/v1/common";
import { Memo } from "@/types/proto/api/v1/memo_service";

// Helper function to extract shortcut ID from resource name
// Format: users/{user}/shortcuts/{shortcut}
const getShortcutId = (name: string): string => {
  const parts = name.split("/");
  return parts.length === 4 ? parts[3] : "";
};

const Home = observer(() => {
  const user = useCurrentUser();
  const selectedShortcut = userStore.state.shortcuts.find((shortcut) => getShortcutId(shortcut.name) === memoFilterStore.shortcut);

  const memoListFilter = useMemo(() => {
    const conditions = [];
    const contentSearch: string[] = [];
    const tagSearch: string[] = [];
    for (const filter of memoFilterStore.filters) {
      if (filter.factor === "contentSearch") {
        contentSearch.push(`"${filter.value}"`);
      } else if (filter.factor === "tagSearch") {
        tagSearch.push(`"${filter.value}"`);
      } else if (filter.factor === "pinned") {
        conditions.push(`pinned == true`);
      } else if (filter.factor === "property.hasLink") {
        conditions.push(`has_link == true`);
      } else if (filter.factor === "property.hasTaskList") {
        conditions.push(`has_task_list == true`);
      } else if (filter.factor === "property.hasCode") {
        conditions.push(`has_code == true`);
      } else if (filter.factor === "displayTime") {
        const filterDate = new Date(filter.value);
        const filterUtcTimestamp = filterDate.getTime() + filterDate.getTimezoneOffset() * 60 * 1000;
        const timestampAfter = filterUtcTimestamp / 1000;
        conditions.push(`display_time_after == ${timestampAfter}`);
        conditions.push(`display_time_before == ${timestampAfter + 60 * 60 * 24}`);
      }
    }
    if (contentSearch.length > 0) {
      conditions.push(`content_search == [${contentSearch.join(", ")}]`);
    }
    if (tagSearch.length > 0) {
      conditions.push(`tag_search == [${tagSearch.join(", ")}]`);
    }
    return conditions.join(" && ");
  }, [user, memoFilterStore.filters, viewStore.state.orderByTimeAsc]);

  return (
    <div className="w-full min-h-full bg-background text-foreground">
      <PagedMemoList
        renderer={(memo: Memo) => <MemoView key={`${memo.name}-${memo.displayTime}`} memo={memo} showVisibility showPinned compact />}
        listSort={(memos: Memo[]) =>
          memos
            .filter((memo) => memo.state === State.NORMAL)
            .sort((a, b) =>
              viewStore.state.orderByTimeAsc
                ? dayjs(a.displayTime).unix() - dayjs(b.displayTime).unix()
                : dayjs(b.displayTime).unix() - dayjs(a.displayTime).unix(),
            )
            .sort((a, b) => Number(b.pinned) - Number(a.pinned))
        }
        owner={user.name}
        orderBy={viewStore.state.orderByTimeAsc ? "display_time asc" : "display_time desc"}
        filter={selectedShortcut?.filter || ""}
        oldFilter={memoListFilter}
      />
    </div>
  );
});

export default Home;
