/**
 * Patch: fall back to createFile when the PUT (update) itself returns Not Found.
 *
 * Problem: patch-store-github-update-fallback catches "Not Found" in the READ
 * step (sha = undefined → createFile). But if the file exists during the read
 * (sha obtained) and then disappears before the PUT (race condition, or any
 * other Gitea edge case), the PUT returns 404 and the outer catch block throws
 * "Could not update file" with no recovery path.
 *
 * Fix: in the PUT catch block, if the error includes "Not Found", fall back to
 * createFile() just as the read-step fallback does.
 *
 * Note: renames `const message` inside the catch to `const updateMsg` to avoid
 * a TDZ conflict — the outer `message` (commit message from function params)
 * needs to be accessible in the new if-branch.
 */

import { readFile, writeFile, access } from "node:fs/promises";

const TARGET = "node_modules/@indiekit/store-github/index.js";
const MARKER = "// [patch] store-github-put-fallback";

const OLD_CATCH = `    } catch (error) {
      const message = crudErrorMessage({
        error,
        operation: "update",
        filePath,
        repo,
        branch,
      });
      debug(message);
      throw new Error(message);
    }`;

const NEW_CATCH = `    } catch (error) {
      if (error.message && error.message.includes("Not Found")) { ${MARKER}
        // File disappeared between read and write — fall back to create
        debug(\`File \${filePath} not found during PUT in repo \${repo} — falling back to createFile\`);
        return this.createFile(filePath, content, { message });
      }
      const updateMsg = crudErrorMessage({ ${MARKER}
        error,
        operation: "update",
        filePath,
        repo,
        branch,
      });
      debug(updateMsg);
      throw new Error(updateMsg);
    }`;

async function exists(p) {
  try { await access(p); return true; } catch { return false; }
}

if (!(await exists(TARGET))) {
  console.log(`[postinstall] store-github-put-fallback: target not found, skipping`);
  process.exit(0);
}

const source = await readFile(TARGET, "utf8");

if (source.includes(MARKER)) {
  console.log("[postinstall] store-github-put-fallback: already patched");
  process.exit(0);
}

if (!source.includes(OLD_CATCH)) {
  console.warn("[postinstall] store-github-put-fallback: PUT catch snippet not found — skipping");
  process.exit(0);
}

await writeFile(TARGET, source.replace(OLD_CATCH, NEW_CATCH), "utf8");
console.log(`[postinstall] store-github-put-fallback: patched ${TARGET}`);