# All files / src/components/tools ShellCard.tsx

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     import { useState, type JSX } from "react";
    import { Check, ChevronRight, Loader, X } from "lucide-react";
    import type { ToolCardProps } from "./ToolCardProps.js";
    import { parseShellOutput } from "./parseShellOutput.js";
    import { ICON_SM } from "../../utils/iconSize.js";
    import styles from "./toolCards.module.scss";

    /** Extracts the command string from shell tool args. */
    function getCommand(args: unknown): string {
      if (args === null || args === undefined || typeof args !== "object") {
        return "";
      }
      const a = args as Record<string, unknown>;
      if (typeof a.command === "string") {
        return a.command;
      }
      return "";
    }

    /**
     * Simplifies a shell command for display.
     *
     * Strips PowerShell wrappers like `"C:\\Program Files\\PowerShell\\7\\pwsh.exe" -Command 'inner'`
     * down to just the inner command.
     */
    export function simplifyCommand(cmd: string): string {
      // Match: "...pwsh.exe" -Command 'inner command'
      const pwshMatch = /pwsh(?:\.exe)?["']?\s+-Command\s+'([^']*)'\s*$/i.exec(cmd);
      if (pwshMatch) {
        return pwshMatch[1];
      }
      // Match: "...pwsh.exe" -Command "inner command"
      const pwshMatch2 = /pwsh(?:\.exe)?["']?\s+-Command\s+"([^"]*)"\s*$/i.exec(cmd);
      if (pwshMatch2) {
        return pwshMatch2[1];
      }
      return cmd;
    }

    /** Number of output lines shown when collapsed. */
    const PREVIEW_LINES: number = 3;

    /** Renders a shell command tool call with terminal-style output. */
    export function ShellCard({ tool, args, result, isError }: ToolCardProps): JSX.Element {
      const [expanded, setExpanded] = useState(false);
      const rawCommand = getCommand(args);
      const command = simplifyCommand(rawCommand);
      const inProgress = result === undefined;

      const parsed = result ? parseShellOutput(result) : null;
      const outputLines = parsed?.output.split("\n") ?? [];
      const hasMore = outputLines.length > PREVIEW_LINES;
      const displayLines = expanded ? outputLines : outputLines.slice(0, PREVIEW_LINES);
      const exitCode: number | undefined = parsed?.exitCode;
      const derivedIsError: boolean = isError || (exitCode !== undefined && exitCode !== 0);

      return (
        <div
          className={`${styles.card} ${derivedIsError ? styles.cardRed : styles.cardNeutral}`}
          data-testid="tool-card-shell"
        >
          <div className={styles.header}>
            <span
              className={styles.icon}
              style={{
                color: "var(--text-secondary)",
                fontFamily: "var(--font-mono)",
                fontWeight: "bold",
              }}
            >
              $
            </span>
            <span
              className={styles.fileName}
              style={{ flex: 1, color: "var(--text-primary)" }}
              title={rawCommand !== command ? rawCommand : undefined}
              data-testid="tool-card-command"
            >
              {command}
            </span>
            {exitCode !== undefined && (
              <span
                className={exitCode === 0 ? styles.exitOk : styles.exitError}
                data-testid="tool-card-exit-code"
              >
                {exitCode === 0 ? (
                  <Check size={ICON_SM} aria-hidden="true" />
                ) : (
                  <X size={ICON_SM} aria-hidden="true" />
                )}{" "}
                exit {exitCode}
              </span>
            )}
            {inProgress && (
              <span className={styles.exitPending} data-testid="tool-card-pending">
                <Loader size={ICON_SM} aria-hidden="true" />
              </span>
            )}
          </div>

          {!inProgress && parsed && parsed.output.length > 0 && (
            <>
              <pre className={styles.pre} data-testid="tool-card-output">
                {displayLines.join("\n")}
              </pre>
              {hasMore && (
                <button
                  type="button"
                  className={styles.bodyToggle}
                  onClick={() => {
                    setExpanded((v) => !v);
                  }}
                  aria-expanded={expanded}
                  data-testid="tool-card-toggle"
                >
                  <span
                    className={`${styles.chevron} ${expanded ? styles.chevronExpanded : ""}`}
                    aria-hidden="true"
                  >
                    <ChevronRight size={ICON_SM} />
                  </span>
                  {expanded ? "collapse" : `${outputLines.length - PREVIEW_LINES} more lines`}
                </button>
              )}
            </>
          )}
        </div>
      );
    }