import { strict as assert } from "node:assert";
import { mkdtempSync, readFileSync, rmSync, writeFileSync, existsSync, mkdirSync } from "node:fs";
import { tmpdir } from "node:os";
import { join, resolve, dirname } from "node:path";
import {
  stripThinkBlocks,
  extractAssistantText,
  materializeReasoningTargets,
} from "./reasoning-materialize.mjs";

assert.equal(stripThinkBlocks("<think>secret</think>\n{\"a\":1}"), "{\"a\":1}");
assert.equal(
  extractAssistantText({
    type: "message_end",
    message: { role: "assistant", content: [{ type: "text", text: "<think>x</think>\n{\"ok\":true}" }] },
  }),
  "<think>x</think>\n{\"ok\":true}",
);
assert.equal(extractAssistantText({ type: "message_end", message: { role: "user", content: [{ type: "text", text: "no" }] } }), "");

const dir = mkdtempSync(join(tmpdir(), "pi-reason-mat-"));
try {
  const written = materializeReasoningTargets({
    workspace: dir,
    targets: ["narrative.md"],
    assistantText: "<think>ignore</think>\n{\"schema_kind\":\"change_report_narrative_v1\"}",
    existsSync,
    readFileSync,
    writeFileSync,
    mkdirSync,
    resolve,
    dirname,
  });
  assert.deepEqual(written, ["narrative.md"]);
  assert.equal(readFileSync(join(dir, "narrative.md"), "utf8"), "{\"schema_kind\":\"change_report_narrative_v1\"}");

  // Existing non-empty target must not be overwritten.
  writeFileSync(join(dir, "keep.md"), "kept", "utf8");
  const again = materializeReasoningTargets({
    workspace: dir,
    targets: ["keep.md"],
    assistantText: "overwrite?",
    existsSync,
    readFileSync,
    writeFileSync,
    mkdirSync,
    resolve,
    dirname,
  });
  assert.deepEqual(again, []);
  assert.equal(readFileSync(join(dir, "keep.md"), "utf8"), "kept");
} finally {
  rmSync(dir, { recursive: true, force: true });
}

console.log("reasoning-materialize.test.mjs PASS");