import type { CommandOutput, OutputFormat, Writer } from "./types.js";

function renderText(payload: CommandOutput<unknown>) {
  const data = payload.data as Record<string, unknown>;

  if (Array.isArray(data?.issues)) {
    return data.issues
      .map((issue) => {
        const item = issue as Record<string, string>;
        return `${item.key} [${item.status}] ${item.issueType} - ${item.summary}`;
      })
      .join("\n");
  }

  if (data?.issue && typeof data.issue === "object") {
    const issue = data.issue as Record<string, string>;
    return [
      issue.key,
      `${issue.issueType} | ${issue.status}`,
      issue.summary,
      issue.url,
    ].join("\n");
  }

  if (Array.isArray(data?.transitions)) {
    return data.transitions
      .map((transition) => {
        const item = transition as Record<string, string>;
        return `${item.id} ${item.name} -> ${item.toStatus}`;
      })
      .join("\n");
  }

  return JSON.stringify(payload, null, 2);
}

export function writeOutput(
  writer: Writer,
  payload: CommandOutput<unknown>,
  format: OutputFormat = "json",
) {
  const body = format === "text" ? renderText(payload) : JSON.stringify(payload, null, 2);
  writer.write(`${body}\n`);
}