import type { CommandRunResult } from "./types";

const DEFAULT_OUTPUT_LIMIT = 4000;

export function truncateOutput(output: string, limit = DEFAULT_OUTPUT_LIMIT): string {
  const normalized = output.trim();
  if (normalized.length <= limit) return normalized;
  return `${normalized.slice(0, limit)}\n… output truncated (${normalized.length - limit} more characters)`;
}

export function commandOutput(result: Pick<CommandRunResult, "stdout" | "stderr">): string {
  return truncateOutput([result.stdout, result.stderr].filter((part) => part.trim().length > 0).join("\n"));
}

export function formatWarnings(title: string, warnings: string[]): string {
  if (warnings.length === 0) return "";
  return `${title}:\n\n${warnings.map((warning) => `⚠️ ${warning}`).join("\n")}`;
}

export function formatCommandIssue(toolId: string, action: string, result: CommandRunResult): string {
  const output = commandOutput(result);
  const suffix = result.killed ? " (killed/timeout)" : "";
  if (!output) return `⚠️ ${toolId} ${action} failed with exit code ${result.code}${suffix}`;
  return `⚠️ ${toolId} ${action} failed with exit code ${result.code}${suffix}:\n${output}`;
}

export function formatDiagnosticOutput(toolId: string, output: string): string {
  const compact = truncateOutput(output);
  if (!compact) return `⚠️ ${toolId} found issues`;
  return `⚠️ ${toolId} found issues:\n${compact}`;
}

export function hasIssueOutput(output: string): boolean {
  return output.includes("⚠️");
}

export function joinSections(title: string, lines: string[]): string {
  const nonEmpty = lines.filter((line) => line.trim().length > 0);
  if (nonEmpty.length === 0) return "";
  return `${title}:\n\n${nonEmpty.join("\n")}`;
}