"use client";
import { useMemo, useState } from "react";
import { parseColor } from "react-aria-components";
import { useEntity } from "src/replicache";
import { useColorAttribute, colorToString } from "./useColorAttribute";
import { BaseThemeProvider, CardBorderHiddenContext } from "./ThemeProvider";
import { PubLeafletPublication, PubLeafletThemeColor } from "lexicons/api";
import type * as SiteStandardThemeBasic from "lexicons/api/types/site/standard/theme/basic";
import { resolvePublicationTheme } from "lexicons/src/normalize";
import {
  usePublicationData,
  useNormalizedPublicationRecord,
} from "app/(app)/lish/[did]/[publication]/dashboard/PublicationSWRProvider";
import { blobRefToSrc } from "src/utils/blobRefToSrc";
import { PubThemeDefaults } from "./themeDefaults";

export type PubThemeSource =
  | {
      theme?: PubLeafletPublication.Theme | null;
      basicTheme?: SiteStandardThemeBasic.Main | null;
    }
  | null
  | undefined;

// Default page background for standalone leaflets (matches editor default)
const StandalonePageBackground = "#FFFFFF";
function parseThemeColor(
  c: PubLeafletThemeColor.Rgb | PubLeafletThemeColor.Rgba,
) {
  if (c.$type === "pub.leaflet.theme.color#rgba") {
    return parseColor(`rgba(${c.r}, ${c.g}, ${c.b}, ${c.a / 100})`);
  }
  return parseColor(`rgb(${c.r}, ${c.g}, ${c.b})`);
}

let useColor = (
  theme: PubLeafletPublication.Record["theme"] | null | undefined,
  c: keyof typeof PubThemeDefaults,
) => {
  return useMemo(() => {
    let v = theme?.[c];
    if (isColor(v)) {
      return parseThemeColor(v);
    } else return parseColor(PubThemeDefaults[c]);
  }, [theme?.[c]]);
};
let isColor = (
  c: any,
): c is PubLeafletThemeColor.Rgb | PubLeafletThemeColor.Rgba => {
  return (
    c?.$type === "pub.leaflet.theme.color#rgb" ||
    c?.$type === "pub.leaflet.theme.color#rgba"
  );
};

export function PublicationThemeProviderDashboard(props: {
  children: React.ReactNode;
}) {
  let { data } = usePublicationData();
  let { publication: pub } = data || {};
  const normalizedPub = useNormalizedPublicationRecord();
  return (
    <PublicationThemeProvider
      pub_creator={pub?.identity_did || ""}
      record={normalizedPub}
    >
      <PublicationBackgroundProvider
        record={normalizedPub}
        pub_creator={pub?.identity_did || ""}
      >
        {props.children}
      </PublicationBackgroundProvider>
    </PublicationThemeProvider>
  );
}

export function PublicationBackgroundProvider(props: {
  record?: PubThemeSource;
  pub_creator: string;
  className?: string;
  children: React.ReactNode;
  localBgImage?: string | null;
  localBgImageRepeat?: number | null;
}) {
  let backgroundImage =
    props.localBgImage !== undefined
      ? props.localBgImage
      : props.record?.theme?.backgroundImage?.image?.ref
        ? blobRefToSrc(
            props.record?.theme?.backgroundImage?.image?.ref,
            props.pub_creator,
          )
        : null;

  let backgroundImageRepeat =
    props.localBgImageRepeat !== undefined
      ? !!props.localBgImageRepeat
      : props.record?.theme?.backgroundImage?.repeat;
  let backgroundImageSize =
    (props.localBgImageRepeat !== undefined
      ? props.localBgImageRepeat
      : props.record?.theme?.backgroundImage?.width) || 500;

  return (
    <div
      className={`PubBackgroundWrapper w-full bg-bg-leaflet text-primary h-full flex flex-col bg-cover bg-center bg-no-repeat items-stretch ${props.className}`}
      style={{
        backgroundImage: backgroundImage
          ? `url(${backgroundImage})`
          : undefined,
        backgroundRepeat: backgroundImageRepeat ? "repeat" : "no-repeat",
        backgroundSize: `${backgroundImageRepeat ? `${backgroundImageSize}px` : "cover"}`,
      }}
    >
      {props.children}
    </div>
  );
}
export function PublicationThemeProvider(props: {
  local?: boolean;
  children: React.ReactNode;
  record?: PubThemeSource;
  pub_creator: string;
  isStandalone?: boolean;
}) {
  let theme = usePubTheme(props.record, props.isStandalone);
  let cardBorderHidden = !theme.showPageBackground;
  let hasBackgroundImage = !!props.record?.theme?.backgroundImage?.image?.ref;

  return (
    <CardBorderHiddenContext.Provider value={cardBorderHidden}>
      <BaseThemeProvider
        local={props.local}
        {...theme}
        hasBackgroundImage={hasBackgroundImage}
      >
        {props.children}
      </BaseThemeProvider>
    </CardBorderHiddenContext.Provider>
  );
}

export const usePubTheme = (
  source?: PubThemeSource,
  isStandalone?: boolean,
) => {
  const theme = useMemo(() => resolvePublicationTheme(source), [source]);
  let bgLeaflet = useColor(theme, "backgroundColor");
  let bgPage = useColor(theme, "pageBackground");
  // For standalone documents, use the editor default page background (#FFFFFF)
  // For publications without explicit pageBackground, use bgLeaflet
  if (isStandalone && !theme?.pageBackground) {
    bgPage = parseColor(StandalonePageBackground);
  } else if (theme && !theme.pageBackground) {
    bgPage = bgLeaflet;
  }
  // For standalone documents, default to showing page background
  // For publications, default to hiding it (borderless)
  let showPageBackground = isStandalone
    ? theme?.showPageBackground !== false
    : !!theme?.showPageBackground;
  let pageWidth = theme?.pageWidth;

  let primary = useColor(theme, "primary");

  let accent1 = useColor(theme, "accentBackground");
  let accent2 = useColor(theme, "accentText");

  let highlight1 = useEntity(null, "theme/highlight-1")?.data.value;
  let highlight2 = useColorAttribute(null, "theme/highlight-2");
  let highlight3 = useColorAttribute(null, "theme/highlight-3");

  let headingFontId = theme?.headingFont;
  let bodyFontId = theme?.bodyFont;

  return {
    bgLeaflet,
    bgPage,
    primary,
    accent1,
    accent2,
    highlight1,
    highlight2,
    highlight3,
    showPageBackground,
    pageWidth,
    headingFontId,
    bodyFontId,
  };
};

export const useLocalPubTheme = (
  theme: PubLeafletPublication.Record["theme"] | undefined,
  showPageBackground?: boolean,
) => {
  const pubTheme = usePubTheme({ theme });
  const [localOverrides, setTheme] = useState<Partial<typeof pubTheme>>({});

  const mergedTheme = useMemo(() => {
    let newTheme = {
      ...pubTheme,
      ...localOverrides,
      showPageBackground,
    };

    return {
      ...newTheme,
    };
  }, [pubTheme, localOverrides, showPageBackground]);
  return {
    theme: mergedTheme,
    setTheme,
    resetChanges: () => setTheme({}),
    changes: Object.keys(localOverrides).length > 0,
  };
};
