import type { FileChange, TaskSummary } from "./git.ts";
import { sanitizeTerminalText } from "./patch.ts";

export function fileIcon(status: FileChange["status"]): string {
  if (status === "A") return "+";
  if (status === "D") return "-";
  return "~";
}

export function fileCounts(file: FileChange): string {
  if (file.binary) return "(binary)";
  return `+${file.insertions} -${file.deletions}`;
}

export function displayPath(file: string): string {
  return /[\u0000-\u001f\u007f-\u009f]/.test(file)
    ? sanitizeTerminalText(JSON.stringify(file))
    : file;
}

export function formatSummary(
  summary: TaskSummary,
  expanded: boolean,
  expandHint = "F6 for details",
): string {
  const fileWord = summary.files.length === 1 ? "file" : "files";
  const header = `${summary.files.length} ${fileWord} changed  +${summary.totalInsertions} -${summary.totalDeletions}`;

  if (!expanded) {
    return `${header}  (${expandHint})`;
  }

  const details = summary.files.map(
    (file) => `${fileIcon(file.status)} ${displayPath(file.file)}  ${fileCounts(file)}`,
  );
  return [header, ...details].join("\n");
}