"use client";

import { useEffect, useState } from "react";
import { PaginatedSeriesGrid } from "@/components/library/PaginatedSeriesGrid";
import { RefreshButton } from "@/components/library/RefreshButton";
import { LibraryHeader } from "@/components/library/LibraryHeader";
import { ErrorMessage } from "@/components/ui/ErrorMessage";
import { PullToRefreshIndicator } from "@/components/common/PullToRefreshIndicator";
import { usePullToRefresh } from "@/hooks/usePullToRefresh";
import { useTranslate } from "@/hooks/useTranslate";
import { OptimizedSkeleton } from "@/components/skeletons/OptimizedSkeletons";
import type { LibraryResponse } from "@/types/library";
import type { KomgaSeries, KomgaLibrary } from "@/types/komga";
import type { UserPreferences } from "@/types/preferences";
import { Container } from "@/components/ui/container";
import { Section } from "@/components/ui/section";
import logger from "@/lib/logger";

interface ClientLibraryPageProps {
  currentPage: number;
  libraryId: string;
  preferences: UserPreferences;
  unreadOnly: boolean;
  search?: string;
  pageSize?: number;
}

const DEFAULT_PAGE_SIZE = 20;

export function ClientLibraryPage({
  currentPage,
  libraryId,
  preferences,
  unreadOnly,
  search,
  pageSize,
}: ClientLibraryPageProps) {
  const { t } = useTranslate();
  const [library, setLibrary] = useState<KomgaLibrary | null>(null);
  const [series, setSeries] = useState<LibraryResponse<KomgaSeries> | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const effectivePageSize = pageSize || preferences.displayMode?.itemsPerPage || DEFAULT_PAGE_SIZE;

  useEffect(() => {
    const abortController = new AbortController();

    const fetchData = async () => {
      setLoading(true);
      setError(null);

      try {
        const params = new URLSearchParams({
          page: String(currentPage - 1),
          size: String(effectivePageSize),
          unread: String(unreadOnly),
        });

        if (search) {
          params.append("search", search);
        }

        const response = await fetch(`/api/komga/libraries/${libraryId}/series?${params}`, {
          signal: abortController.signal,
        });

        if (!response.ok) {
          const errorData = await response.json();
          throw new Error(errorData.error?.code || "SERIES_FETCH_ERROR");
        }

        const data = await response.json();
        setLibrary(data.library);
        setSeries(data.series);
      } catch (err) {
        // Ignore abort errors (caused by StrictMode cleanup)
        if (err instanceof Error && err.name === "AbortError") {
          return;
        }
        logger.error({ err }, "Error fetching library series");
        setError(err instanceof Error ? err.message : "SERIES_FETCH_ERROR");
      } finally {
        if (!abortController.signal.aborted) {
          setLoading(false);
        }
      }
    };

    fetchData();

    return () => {
      abortController.abort();
    };
  }, [libraryId, currentPage, unreadOnly, search, effectivePageSize]);

  const handleRefresh = async (libraryId: string) => {
    try {
      const params = new URLSearchParams({
        page: String(currentPage - 1),
        size: String(effectivePageSize),
        unread: String(unreadOnly),
      });

      if (search) {
        params.append("search", search);
      }

      const response = await fetch(`/api/komga/libraries/${libraryId}/series?${params}`, {
        cache: "reload",
      });

      if (!response.ok) {
        throw new Error("Error refreshing library");
      }

      const data = await response.json();
      setLibrary(data.library);
      setSeries(data.series);

      return { success: true };
    } catch (error) {
      logger.error({ err: error }, "Error during refresh:");
      return { success: false, error: "Error refreshing library" };
    }
  };

  const handleRetry = async () => {
    setError(null);
    setLoading(true);

    try {
      const params = new URLSearchParams({
        page: String(currentPage - 1),
        size: String(effectivePageSize),
        unread: String(unreadOnly),
      });

      if (search) {
        params.append("search", search);
      }

      const response = await fetch(`/api/komga/libraries/${libraryId}/series?${params}`, {
        cache: "reload",
      });

      if (!response.ok) {
        const errorData = await response.json();
        throw new Error(errorData.error?.code || "SERIES_FETCH_ERROR");
      }

      const data = await response.json();
      setLibrary(data.library);
      setSeries(data.series);
    } catch (err) {
      logger.error({ err }, "Error fetching library series");
      setError(err instanceof Error ? err.message : "SERIES_FETCH_ERROR");
    } finally {
      setLoading(false);
    }
  };

  const pullToRefresh = usePullToRefresh({
    onRefresh: async () => {
      await handleRefresh(libraryId);
    },
    enabled: !loading && !error && !!library && !!series,
  });

  if (loading) {
    return (
      <>
        {/* Header skeleton */}
        <div className="relative min-h-[200px] md:h-[200px] w-screen -ml-[calc((100vw-100%)/2)] overflow-hidden mb-8">
          <div className="absolute inset-0 bg-gradient-to-br from-primary/20 via-primary/10 to-background" />
          <div className="relative container mx-auto px-4 py-8 h-full">
            <div className="flex flex-col md:flex-row gap-6 items-center md:items-start h-full">
              <OptimizedSkeleton className="w-[120px] h-[120px] rounded-lg" />
              <div className="flex-1 space-y-3">
                <OptimizedSkeleton className="h-10 w-64" />
                <div className="flex gap-4">
                  <OptimizedSkeleton className="h-8 w-32" />
                  <OptimizedSkeleton className="h-8 w-32" />
                  <OptimizedSkeleton className="h-10 w-10 rounded-full" />
                </div>
              </div>
            </div>
          </div>
        </div>

        <Container>
          {/* Filters */}
          <div className="flex flex-col gap-4 mb-8">
            <div className="flex flex-col sm:flex-row sm:items-center gap-4">
              <div className="w-full">
                <OptimizedSkeleton className="h-10 w-full" />
              </div>
              <div className="flex items-center justify-end gap-2">
                <OptimizedSkeleton className="h-10 w-24" />
                <OptimizedSkeleton className="h-10 w-10 rounded" />
                <OptimizedSkeleton className="h-10 w-10 rounded" />
              </div>
            </div>
          </div>

          {/* Grid */}
          <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-5 gap-4 mb-8">
            {Array.from({ length: effectivePageSize }).map((_, i) => (
              <OptimizedSkeleton key={i} className="aspect-[2/3] w-full rounded-lg" />
            ))}
          </div>

          {/* Pagination */}
          <div className="flex flex-col items-center gap-4 sm:flex-row sm:justify-between">
            <OptimizedSkeleton className="h-5 w-32 order-2 sm:order-1" />
            <OptimizedSkeleton className="h-10 w-64 order-1 sm:order-2" />
          </div>
        </Container>
      </>
    );
  }

  if (error) {
    return (
      <Container>
        <Section
          title={library?.name || t("series.empty")}
          actions={<RefreshButton libraryId={libraryId} refreshLibrary={handleRefresh} />}
        />
        <ErrorMessage errorCode={error} onRetry={handleRetry} />
      </Container>
    );
  }

  if (!library || !series) {
    return (
      <Container>
        <ErrorMessage errorCode="SERIES_FETCH_ERROR" onRetry={handleRetry} />
      </Container>
    );
  }

  return (
    <>
      <PullToRefreshIndicator
        isPulling={pullToRefresh.isPulling}
        isRefreshing={pullToRefresh.isRefreshing}
        progress={pullToRefresh.progress}
        canRefresh={pullToRefresh.canRefresh}
        isHiding={pullToRefresh.isHiding}
      />
      <LibraryHeader
        library={library}
        seriesCount={series.totalElements}
        series={series.content || []}
        refreshLibrary={handleRefresh}
      />
      <Container>
        <PaginatedSeriesGrid
          series={series.content || []}
          currentPage={currentPage}
          totalPages={series.totalPages}
          totalElements={series.totalElements}
          defaultShowOnlyUnread={preferences.showOnlyUnread}
          showOnlyUnread={unreadOnly}
          pageSize={effectivePageSize}
        />
      </Container>
    </>
  );
}