import { JSX, Match, Show, Switch, splitProps } from "solid-js";

import { Trans } from "@lingui-solid/solid/macro";
import { cva } from "styled-system/css";

import { useClient } from "@revolt/client";
import { useModals } from "@revolt/modal";
import { paramsFromPathname } from "@revolt/routing";
import { useState } from "@revolt/state";
import { Avatar, iconSize } from "@revolt/ui";
import { Invite } from "@revolt/ui/components/features/messaging/elements/Invite";
import { Symbol } from "@revolt/ui/components/utils/Symbol";

import MdChat from "@material-design-icons/svg/outlined/chat.svg?component-solid";
import MdChevronRight from "@material-design-icons/svg/outlined/chevron_right.svg?component-solid";
import MdPeople from "@material-design-icons/svg/outlined/people.svg?component-solid";
// import { determineLink } from "../../../lib/links";
// import { modalController } from "../../../controllers/modals/ModalController";

const link = cva({
  base: {
    cursor: "pointer",
    color: "var(--md-sys-color-primary) !important",
  },
});

const internalLink = cva({
  base: {
    verticalAlign: "bottom",

    gap: "4px",
    paddingLeft: "2px",
    paddingRight: "6px",
    alignItems: "center",
    display: "inline-flex",
    textDecoration: "none !important",

    cursor: "pointer",
    fontWeight: 600,
    borderRadius: "var(--borderRadius-lg)",
    fill: "var(--md-sys-color-on-primary)",
    color: "var(--md-sys-color-on-primary)",
    background: "var(--md-sys-color-primary)",
  },
});

export function RenderAnchor(
  props: { disabled?: boolean } & JSX.AnchorHTMLAttributes<HTMLAnchorElement>,
) {
  /* eslint-disable solid/reactivity */
  /* eslint-disable solid/components-return-once */

  const [localProps, remoteProps] = splitProps(props, [
    "href",
    "target",
    "disabled",
  ]);

  // Handle case where there is no link
  if (!localProps.href) return <span>{remoteProps.children}</span>;

  // Handle links that navigate internally
  try {
    let url = new URL(localProps.href);

    // Remap discover links to native links
    if (url.origin === "https://rvlt.gg" || url.origin === "https://stt.gg") {
      if (/^\/[\w\d]+$/.test(url.pathname)) {
        url = new URL(`/invite${url.pathname}`, location.origin);
      } else if (url.pathname.startsWith("/discover")) {
        url = new URL(url.pathname, location.origin);
      }
    }

    // Determine whether it's in our scope
    if (
      [
        location.origin,
        // legacy
        "https://app.revolt.chat",
        "https://revolt.chat",
        // new
        "https://stoat.chat",
      ].includes(url.origin)
    ) {
      const client = useClient();
      const params = paramsFromPathname(url.pathname);

      if (params.exactChannel) {
        const channel = () => client().channels.get(params.channelId!);

        const internalUrl = () =>
          new URL(
            (channel()!.serverId
              ? `/server/${channel()!.serverId}/channel/${channel()!.id}`
              : `/channel/${channel()!.id}`) +
              (params.exactMessage && params.messageId
                ? `/${params.messageId}`
                : ""),
            location.origin,
          ).toString();

        return (
          <Switch
            fallback={
              <span class={internalLink()}>
                <Symbol>tag</Symbol>
                <Trans>Private Channel</Trans>
              </span>
            }
          >
            <Match when={channel()}>
              <LinkComponent
                class={internalLink()}
                disabled={localProps.disabled}
                href={internalUrl()}
              >
                <Symbol>tag</Symbol>
                {channel()!.name}
                {params.exactMessage && (
                  <>
                    <MdChevronRight {...iconSize("1em")} />
                    <MdChat {...iconSize("1em")} />
                  </>
                )}
              </LinkComponent>
            </Match>
          </Switch>
        );
      } else if (params.exactServer) {
        const server = () => client().servers.get(params.serverId!);
        const internalUrl = () =>
          new URL(`/server/${server()!.id}`, location.origin).toString();

        return (
          <Switch
            fallback={
              <span class={internalLink()}>
                <MdPeople {...iconSize("1em")} />
                <Trans>Unknown Server</Trans>
              </span>
            }
          >
            <Match when={server()}>
              <LinkComponent
                class={internalLink()}
                disabled={localProps.disabled}
                href={internalUrl()}
              >
                <Avatar size={16} src={server()?.iconURL} /> {server()?.name}
              </LinkComponent>
            </Match>
          </Switch>
        );
      } else if (
        params.inviteId &&
        // only display invites if it is just the plain link:
        Array.isArray(remoteProps.children) &&
        remoteProps.children[0] === localProps.href &&
        !localProps.disabled
      ) {
        return <Invite code={params.inviteId} />;
      } else {
        const internalUrl = () =>
          new URL(url.pathname, location.origin).toString();

        return (
          <LinkComponent
            {...remoteProps}
            class={link()}
            disabled={localProps.disabled}
            href={internalUrl()}
          />
        );
      }
    }

    // ... all other links:
    const state = useState();
    const { openModal } = useModals();

    function onHandleWarning(
      event: MouseEvent & { currentTarget: HTMLAnchorElement },
    ) {
      if (event.button === 0 || event.button === 1) {
        event.preventDefault();
        event.stopPropagation();

        openModal({
          type: "link_warning",
          url,
          display: event.currentTarget!.innerText,
        });
      }
    }

    return (
      <Show
        when={state.linkSafety.isTrusted(url)}
        fallback={
          <LinkComponent
            {...remoteProps}
            class={link()}
            disabled={localProps.disabled}
            onClick={onHandleWarning}
            onAuxClick={onHandleWarning}
          />
        }
      >
        <LinkComponent
          {...remoteProps}
          class={link()}
          disabled={localProps.disabled}
          href={localProps.href}
          target={"_blank"}
          rel="noreferrer"
        />
      </Show>
    );

    // eslint-disable-next-line @typescript-eslint/no-unused-vars
  } catch (_) {
    // invalid URL
    return <span>{props.children}</span>;
  }
}

function LinkComponent(
  props: { disabled?: boolean } & JSX.AnchorHTMLAttributes<HTMLAnchorElement>,
) {
  const [localProps, remoteProps] = splitProps(props, ["disabled"]);
  if (localProps.disabled) {
    return <span class={remoteProps.class}>{remoteProps.children}</span>;
  }
  return <a {...remoteProps} />;
}