export interface ConfigValidationIssue {
  code: string;
  message: string;
  path: string;
}

export function dedupeIssues(issues: ConfigValidationIssue[]): ConfigValidationIssue[] {
  const seen = new Set<string>();
  const result: ConfigValidationIssue[] = [];
  for (const item of issues) {
    const key = `${item.code}:${item.path}:${item.message}`;
    if (seen.has(key)) continue;
    seen.add(key);
    result.push(item);
  }
  return result;
}

export function formatConfigIssues(issues: ConfigValidationIssue[]): string {
  return issues.map(formatConfigIssue).join("\n");
}

export function issue(code: string, path: string, message: string): ConfigValidationIssue {
  return { code, message, path };
}

export function joinPath(base: string, key: string): string {
  if (base === "") return key;
  if (key.startsWith("[")) return `${base}${key}`;
  return `${base}.${key}`;
}

export function renderPath(path: string): string {
  return path === "" ? "配置文件" : path;
}

export function throwConfigIssues(issues: ConfigValidationIssue[]): never {
  throw new Error(formatConfigIssues(issues));
}

function formatConfigIssue(i: ConfigValidationIssue): string {
  return `${renderPath(i.path)} ${i.message}`;
}