import sys
from pathlib import Path

_EXAMPLES_ROOT = Path(__file__).resolve().parents[1]
if str(_EXAMPLES_ROOT) not in sys.path:
    sys.path.insert(0, str(_EXAMPLES_ROOT))

from _bootstrap import ensure_local_sdk_src, runtime_config

ensure_local_sdk_src()

from openai_codex import (
    Codex,
)
from openai_codex.types import (
    ThreadTokenUsageUpdatedNotification,
    TurnCompletedNotification,
)

print("Codex mini CLI. Type /exit to quit.")


def _format_usage(usage: object) -> str:
    last = usage.last
    total = usage.total
    return (
        "usage>\n"
        f"  last: input={last.input_tokens} output={last.output_tokens} reasoning={last.reasoning_output_tokens} total={last.total_tokens} cached={last.cached_input_tokens}\n"
        f"  total: input={total.input_tokens} output={total.output_tokens} reasoning={total.reasoning_output_tokens} total={total.total_tokens} cached={total.cached_input_tokens}"
    )


with Codex(config=runtime_config()) as codex:
    thread = codex.thread_start(model="gpt-5.4", config={"model_reasoning_effort": "high"})
    print("Thread:", thread.id)

    while True:
        try:
            user_input = input("you> ").strip()
        except EOFError:
            break

        if not user_input:
            continue
        if user_input in {"/exit", "/quit"}:
            break

        turn = thread.turn(user_input)
        usage = None
        status = None
        error = None

        print("assistant> ", end="", flush=True)
        for event in turn.stream():
            payload = event.payload
            if event.method == "item/agentMessage/delta":
                delta = payload.delta
                if delta:
                    print(delta, end="", flush=True)
                continue
            if isinstance(payload, ThreadTokenUsageUpdatedNotification):
                usage = payload.token_usage
                continue
            if isinstance(payload, TurnCompletedNotification):
                status = payload.turn.status
                error = payload.turn.error

        print()
        if status is None:
            raise RuntimeError("stream ended without turn/completed")
        if usage is None:
            raise RuntimeError("stream ended without token usage")

        status_text = status.value
        print(f"assistant.status> {status_text}")
        if status_text == "failed":
            print("assistant.error>", error)

        print(_format_usage(usage))
