"""Codex CLI: `codex exec --json ... -o last.md -` (stdin prompt), resume with `codex exec resume <thread>`.
Thread id comes from the `thread.started` event in events.jsonl; the last message from last.md."""
import json

from .base import ExecResult, RunnerExecutor


class CodexExecutor(RunnerExecutor):
    stdout_name = "events.jsonl"

    def collect(self, handle):
        t, d = self.transport, handle["run_dir"]
        last = t.read_text(t.join(d, "last.md")) or ""
        thread = handle.get("thread_id")
        line = t.grep_first(t.join(d, "events.jsonl"), "thread.started")
        if line:
            try:
                thread = json.loads(line).get("thread_id") or thread
            except ValueError:
                pass
        tail = (self.stderr_tail(handle) + "\n" + t.tail(t.join(d, "events.jsonl"), 1)[-600:]).strip()
        return ExecResult(last.strip(), self.exit_code(handle), thread,
                          self.logs(handle, "events.jsonl", "stderr.txt", "last.md"), tail)