"""Test the environment with multiple LLMs and capture detailed logs.

Usage:
    python scripts/test_multi_model.py
"""
from __future__ import annotations

import asyncio
import os
import sys
import time
from dataclasses import dataclass
from typing import Any

from dotenv import load_dotenv
load_dotenv()

# Add repo root so `import inference` (root-level module) resolves.
_REPO_ROOT = os.path.join(os.path.dirname(__file__), "..")
if _REPO_ROOT not in sys.path:
    sys.path.insert(0, _REPO_ROOT)

from openai import OpenAI
from inference import (
    get_model_action,
    parse_action,
    serialize_observation,
    action_to_str,
    SYSTEM_PROMPT,
)
from triagesieve_env.models import (
    ActionType,
    TriageSieveAction,
    TriageSieveObservation,
)
from triagesieve_env.server.triagesieve_env_environment import TriageSieveEnvironment


HF_TOKEN = os.getenv("HF_TOKEN")
BASE_URL = os.getenv("API_BASE_URL", "https://router.huggingface.co/v1")

MODELS = [
    "Qwen/Qwen2.5-72B-Instruct",
    "meta-llama/Llama-3.3-70B-Instruct",
    "Qwen/Qwen2.5-7B-Instruct",
]

DIFFICULTIES = ["easy", "medium", "hard"]
SEED = 42
MAX_STEPS = {"easy": 8, "medium": 14, "hard": 20}


def run_episode(
    client: OpenAI,
    model_name: str,
    seed: int,
    difficulty: str,
    max_steps: int,
) -> dict[str, Any]:
    """Run one episode synchronously, capturing detailed logs."""
    env = TriageSieveEnvironment()
    obs = env.reset(seed=seed, difficulty=difficulty, mode="eval_strict")

    steps = []
    last_reward = 0.0
    episode_done = False

    for step_num in range(1, max_steps + 1):
        if episode_done or obs.action_budget_remaining <= 0:
            break

        obs_text = serialize_observation(obs)

        # Call LLM
        user_content = f"Step {step_num} | Last reward: {last_reward:.2f}\n\n{obs_text}"
        try:
            completion = client.chat.completions.create(
                model=model_name,
                messages=[
                    {"role": "system", "content": SYSTEM_PROMPT},
                    {"role": "user", "content": user_content},
                ],
                temperature=0.0,
                max_tokens=512,
                stream=False,
            )
            raw_response = (completion.choices[0].message.content or "").strip()
        except Exception as exc:
            raw_response = ""
            print(f"    [LLM ERROR] step {step_num}: {exc}")

        # Parse action
        action = parse_action(raw_response)
        parse_ok = action is not None
        if action is None:
            action = TriageSieveAction(action_type=ActionType.SKIP_TURN, metadata={})

        # Step environment
        obs = env.step(action)
        reward = obs.reward if obs.reward is not None else 0.0
        episode_done = obs.done

        error_str = None if obs.last_action_result == "ok" else obs.last_action_result

        steps.append({
            "step": step_num,
            "raw_llm": raw_response[:120],
            "parsed": parse_ok,
            "action": action_to_str(action),
            "reward": reward,
            "done": episode_done,
            "error": error_str,
            "budget_left": obs.action_budget_remaining,
        })

        last_reward = reward

    # Send finish if not done
    if not episode_done:
        obs = env.step(TriageSieveAction(action_type=ActionType.FINISH_EPISODE, metadata={}))
        reward = obs.reward if obs.reward is not None else 0.0
        steps.append({
            "step": len(steps) + 1,
            "raw_llm": "(auto)",
            "parsed": True,
            "action": "finish_episode",
            "reward": reward,
            "done": True,
            "error": None,
            "budget_left": obs.action_budget_remaining,
        })

    final_score = steps[-1]["reward"] if steps else 0.0

    return {
        "model": model_name,
        "difficulty": difficulty,
        "seed": seed,
        "final_score": final_score,
        "total_steps": len(steps),
        "parse_failures": sum(1 for s in steps if not s["parsed"]),
        "invalid_actions": sum(1 for s in steps if s["error"] is not None),
        "steps": steps,
    }


def print_episode(result: dict[str, Any]) -> None:
    """Print a formatted episode trace."""
    model_short = result["model"].split("/")[-1]
    print(f"\n{'='*80}")
    print(f"  Model: {model_short}  |  Difficulty: {result['difficulty']}  |  Seed: {result['seed']}")
    print(f"{'='*80}")

    for s in result["steps"]:
        parse_marker = "OK" if s["parsed"] else "PARSE_FAIL"
        err = f" ERR: {s['error']}" if s["error"] else ""
        print(
            f"  Step {s['step']:>2}: [{parse_marker:>10}] {s['action']:<40} "
            f"reward={s['reward']:+.3f}{err}"
        )
        if not s["parsed"] and s["raw_llm"] != "(auto)":
            # Show what the LLM actually said
            print(f"           LLM said: {s['raw_llm'][:100]}")

    score = result["final_score"]
    pf = result["parse_failures"]
    ia = result["invalid_actions"]
    print(f"\n  Final Score: {score:.4f}  |  Parse Failures: {pf}  |  Invalid Actions: {ia}")
    status = "GOOD" if score >= 0.5 else ("OK" if score > 0 else "BAD")
    print(f"  Verdict: {status}")


def main() -> None:
    if not HF_TOKEN:
        print("ERROR: HF_TOKEN not set")
        sys.exit(1)

    all_results = []

    for model_name in MODELS:
        client = OpenAI(base_url=BASE_URL, api_key=HF_TOKEN)
        model_short = model_name.split("/")[-1]

        for diff in DIFFICULTIES:
            print(f"\n>>> Running {model_short} / {diff} / seed={SEED} ...", flush=True)
            start = time.time()
            result = run_episode(
                client=client,
                model_name=model_name,
                seed=SEED,
                difficulty=diff,
                max_steps=MAX_STEPS[diff],
            )
            elapsed = time.time() - start
            result["elapsed_s"] = elapsed
            all_results.append(result)
            print_episode(result)
            print(f"  Time: {elapsed:.1f}s")

    # Summary table
    print(f"\n\n{'='*80}")
    print("SUMMARY")
    print(f"{'='*80}")
    print(f"  {'Model':<35} {'Diff':<8} {'Score':>8} {'Steps':>6} {'Parse':>6} {'Invalid':>8} {'Time':>6}")
    print(f"  {'-'*35} {'-'*8} {'-'*8} {'-'*6} {'-'*6} {'-'*8} {'-'*6}")
    for r in all_results:
        model_short = r["model"].split("/")[-1][:35]
        print(
            f"  {model_short:<35} {r['difficulty']:<8} {r['final_score']:>8.4f} "
            f"{r['total_steps']:>6} {r['parse_failures']:>6} {r['invalid_actions']:>8} "
            f"{r['elapsed_s']:>5.1f}s"
        )


if __name__ == "__main__":
    main()