import { Trans, useLingui } from "@lingui/react/macro";
import type { CapabilityInstall } from "@rakazo/contracts";
import { GITHUB_MCP_SOURCE, GITHUB_TOKEN_URL, isGithubInstall } from "@rakazo/core";
import { Button, buttonVariants, cn, Input } from "@rakazo/ui-web";
import { useState } from "react";
import { rpc } from "../../lib/rpc";

/** GitHub's mark, monochrome like the rest of the app. */
function GithubMark({ className }: { className?: string }) {
  return (
    <svg viewBox="0 0 24 24" fill="currentColor" aria-hidden="true" className={className}>
      <path d="M12 .3a12 12 0 0 0-3.8 23.4c.6.1.8-.3.8-.6v-2.2c-3.3.7-4-1.4-4-1.4-.6-1.4-1.4-1.8-1.4-1.8-1-.7.1-.7.1-.7 1.2.1 1.8 1.2 1.8 1.2 1 1.8 2.8 1.3 3.5 1 0-.8.4-1.3.7-1.6-2.7-.3-5.5-1.3-5.5-6 0-1.2.5-2.3 1.3-3.1-.2-.4-.6-1.6 0-3.2 0 0 1-.3 3.4 1.2a11.5 11.5 0 0 1 6 0c2.3-1.5 3.3-1.2 3.3-1.2.6 1.6.2 2.8.1 3.2.8.8 1.2 1.9 1.2 3.1 0 4.6-2.8 5.6-5.5 5.9.5.4.9 1.1.9 2.2v3.3c0 .3.1.7.8.6A12 12 0 0 0 12 .3" />
    </svg>
  );
}

/**
 * GitHub without a vendor account or an app registration: a token from GitHub's prefilled form
 * connects GitHub's own MCP server for every bot.
 */
export function GithubConnect({
  sources,
  onChanged,
}: {
  sources: CapabilityInstall[];
  onChanged: () => Promise<unknown>;
}) {
  const { t } = useLingui();
  const installed = sources.find(isGithubInstall);
  const [open, setOpen] = useState(false);
  const [token, setToken] = useState("");
  const [pending, setPending] = useState(false);
  const [error, setError] = useState<string | null>(null);

  async function run(task: () => Promise<unknown>) {
    setPending(true);
    setError(null);
    try {
      await task();
      await onChanged();
    } catch (err) {
      setError(err instanceof Error ? err.message : t`Could not connect GitHub`);
    } finally {
      setPending(false);
    }
  }

  return (
    <div data-testid="github-connect" className="mb-6 rounded-xl border border-border px-3 py-2.5">
      <div className="flex items-center gap-3">
        <div className="grid size-9 shrink-0 place-items-center rounded-xl bg-accent text-foreground">
          <GithubMark className="size-5" />
        </div>
        <div className="min-w-0 flex-1 truncate text-ui-body font-medium text-foreground">
          GitHub
        </div>
        {installed ? (
          <>
            <span className="text-ui-body-sm text-muted-foreground">
              <Trans>Connected</Trans>
            </span>
            <Button
              type="button"
              variant="ghost"
              size="sm"
              className="rounded-full"
              disabled={pending}
              onClick={() => void run(() => rpc.capabilities.remove({ id: installed.id }))}
            >
              <Trans>Disconnect</Trans>
            </Button>
          </>
        ) : open ? null : (
          <Button
            type="button"
            variant="secondary"
            size="sm"
            className="rounded-full"
            onClick={() => setOpen(true)}
          >
            <Trans>Connect</Trans>
          </Button>
        )}
      </div>
      {!installed && open ? (
        <form
          className="mt-3 flex flex-col gap-2"
          onSubmit={(event) => {
            event.preventDefault();
            void run(async () => {
              await rpc.capabilities.install({
                kind: "mcp",
                name: "GitHub",
                source: GITHUB_MCP_SOURCE,
                credential: token.trim(),
                config: { preset: "github" },
              });
              setToken("");
              setOpen(false);
            });
          }}
        >
          <a
            href={GITHUB_TOKEN_URL}
            target="_blank"
            rel="noreferrer"
            className={cn(buttonVariants({ variant: "outline" }), "rounded-full")}
          >
            <Trans>Create token on GitHub</Trans>
          </a>
          <div className="flex gap-2">
            <Input
              type="password"
              autoComplete="off"
              value={token}
              onChange={(event) => setToken(event.target.value)}
              aria-label={t`GitHub token`}
              placeholder="ghp_…"
              className="h-10 flex-1 rounded-full px-4"
            />
            <Button type="submit" className="rounded-full" disabled={pending || !token.trim()}>
              {pending ? <Trans>Connecting…</Trans> : <Trans>Connect</Trans>}
            </Button>
          </div>
        </form>
      ) : null}
      {error ? <p className="mt-2 text-ui-body-sm text-destructive">{error}</p> : null}
    </div>
  );
}