import asyncio
import math
import os
import sys
import textwrap
from typing import List, Optional

from dotenv import load_dotenv
from openai import OpenAI

# Add parent directory to path so ShopManagerEng is importable as a package
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from ShopManagerEng.client import JewelryShopEnv
from ShopManagerEng.models import JewelryAction

load_dotenv()

IMAGE_NAME = os.getenv("IMAGE_NAME")
API_KEY = os.getenv("HF_TOKEN") or os.getenv("API_KEY")

API_BASE_URL = os.getenv("API_BASE_URL", "https://router.huggingface.co/v1")
# MODEL_NAME = os.getenv("MODEL_NAME", "Qwen/Qwen2.5-72B-Instruct")
MODEL_NAME = os.getenv("MODEL_NAME", "meta-llama/Llama-3.3-70B-Instruct")
TASK_NAME = os.getenv("JEWELRY_ENV_TASK", "jewelry-shop")
BENCHMARK = os.getenv("JEWELRY_ENV_BENCHMARK", "jewelry_shop_benchmark")
MAX_STEPS = 15
TEMPERATURE = 0.7
MAX_TOKENS = 150
SUCCESS_SCORE_THRESHOLD = 0.01


SYSTEM_PROMPT = textwrap.dedent(
    """
    You are an expert agent running a jewelry shop. Maximize profit across 3 phases.

    ## Phase 1: MARKET (buy/wait)
    Gold prices fluctuate ±10% each round (up to 3 rounds).
    - Analyze the price trend from the history.
    - If the price DROPPED from the previous round, it might drop further → consider waiting.
    - If the price ROSE or you're on the last round → buy now.
    - Reserve enough cash for labor ($100-$300 depending on product).
    - Respond: "buy X.XX" (to buy X.XX oz of gold) or "wait" (to see next price).

    ## Phase 2: WAREHOUSE (choose product)
    You see demand levels for each product. Pick the HIGHEST demand product
    that you can afford to craft (enough gold + cash for labor).
    Products: ring (1oz + $200), necklace (2oz + $300), bracelet (0.5oz + $100).
    - Respond: "ring", "necklace", or "bracelet"

    ## Phase 3: SHOWROOM (negotiate)
    A customer offers a price. Your goal is to sell at maximum profit.
    - Counter-offer to drive the price up (customer raises 5% each round, max 5 rounds).
    - Accept when the offer is good (round >= 3 or offer > 1.3× cost).
    - NEVER reject.
    - Respond: "I accept" or a counter like "How about $X?"

    CRITICAL: Respond with ONLY the action value. No explanations.
    """
).strip()


# ── LOGGING ────────────────────────────────────

def log_start(task: str, env: str, model: str) -> None:
    print(f"[START] task={task} env={env} model={model}", flush=True)


def log_step(step: int, action: str, reward: float, done: bool, error: Optional[str]) -> None:
    error_val = error if error else "null"
    done_val = str(done).lower()
    print(
        f"[STEP] step={step} action={action} reward={reward:.2f} done={done_val} error={error_val}",
        flush=True,
    )


def log_end(success: bool, steps: int, score: float, rewards: List[float]) -> None:
    rewards_str = ",".join(f"{r:.2f}" for r in rewards)
    print(f"[END] success={str(success).lower()} steps={steps} score={score:.3f} rewards={rewards_str}", flush=True)


# ── PROMPT BUILDING ────────────────────────────

def build_user_prompt(step: int, obs, last_reward: float, history: List[str]) -> str:
    history_block = "\n".join(history[-4:]) if history else "None"

    if obs.phase == "market":
        prices = obs.gold_price_history
        trend = ""
        if len(prices) >= 2:
            if prices[-1] < prices[-2]:
                trend = "FALLING ↓ (might keep dropping, consider waiting)"
            else:
                trend = "RISING ↑ (buy now before it gets more expensive)"

        rounds_left = obs.max_market_rounds - obs.market_round
        # Suggest buy quantity that reserves $300 for labor (max labor cost)
        reserve = 300.0
        if obs.gold_price > 0:
            raw_qty = (obs.cash - reserve) / obs.gold_price
            suggested_qty = math.floor(raw_qty * 100) / 100
            suggested_qty = max(suggested_qty, 0.01)
        else:
            suggested_qty = 1.0

        phase_hint = (
            f"Price history: {prices}. Trend: {trend}. "
            f"Rounds left: {rounds_left}. "
            f"If buying, suggested qty: {suggested_qty} oz (reserves $300 for labor). "
            f"Respond: 'buy {suggested_qty}' or 'wait'"
        )

    elif obs.phase == "warehouse":
        demand = obs.demand
        best_product = max(demand, key=demand.get) if demand else "ring"
        phase_hint = (
            f"Demand: ring={demand.get('ring', 0):.0%}, "
            f"necklace={demand.get('necklace', 0):.0%}, "
            f"bracelet={demand.get('bracelet', 0):.0%}. "
            f"Highest demand: {best_product}. "
            f"You have {obs.gold_oz}oz gold and ${obs.cash} cash. "
            f"Respond with EXACTLY: {best_product}"
        )

    elif obs.phase == "showroom":
        margin = ""
        if obs.current_offer and obs.cost_basis > 0:
            margin_pct = ((obs.current_offer - obs.cost_basis) / obs.cost_basis) * 100
            margin = f"Margin: {margin_pct:+.1f}%. "

        should_accept = False
        if obs.negotiation_round >= 4:
            should_accept = True
        if obs.current_offer and obs.cost_basis > 0 and obs.current_offer > obs.cost_basis * 1.3:
            should_accept = True

        if should_accept:
            phase_hint = (
                f"Cost: ${obs.cost_basis}. Offer: ${obs.current_offer}. {margin}"
                f"Round {obs.negotiation_round}/5. "
                f"Respond with EXACTLY: I accept"
            )
        else:
            # Vary counter-offers per round
            counter_msgs = [
                "I need a better price for this quality piece",
                "That's too low, this craftsmanship deserves more",
                f"How about ${round(obs.cost_basis * 1.4, 2)}?",
                f"I can't go below ${round(obs.cost_basis * 1.3, 2)}",
            ]
            msg = counter_msgs[min(obs.negotiation_round, len(counter_msgs) - 1)]
            phase_hint = (
                f"Cost: ${obs.cost_basis}. Offer: ${obs.current_offer}. {margin}"
                f"Round {obs.negotiation_round}/5. "
                f"DO NOT ACCEPT. Counter-offer. "
                f"Respond with EXACTLY: {msg}"
            )
    else:
        phase_hint = ""

    return textwrap.dedent(
        f"""
        Step: {step} | Phase: {obs.phase} | Last reward: {last_reward:.2f}
        Cash: ${obs.cash} | Gold: {obs.gold_oz}oz | Rings: {obs.inventory}
        Gold Price: ${obs.gold_price}/oz
        Env Message: {obs.message}

        {phase_hint}

        History: {history_block}
        """
    ).strip()


# ── ACTION PARSING ─────────────────────────────

def get_action_from_text(phase: str, text: str) -> tuple[JewelryAction, str]:
    text = text.strip().replace("`", "").strip(' \t\n\r"\'')

    if phase == "market":
        lower = text.lower()
        if lower.startswith("buy"):
            # Extract quantity from "buy 2.5" or "buy2.5"
            qty_str = lower.replace("buy", "").strip()
            try:
                qty = float(qty_str)
            except ValueError:
                qty = 1.0
            return JewelryAction(market_action="buy", gold_qty=qty), f"buy {qty}"
        elif "wait" in lower:
            return JewelryAction(market_action="wait"), "wait"
        else:
            # Try to parse as a number (assumed buy)
            try:
                qty = float(text)
                return JewelryAction(market_action="buy", gold_qty=qty), f"buy {qty}"
            except ValueError:
                return JewelryAction(market_action="wait"), "wait"

    elif phase == "warehouse":
        lower = text.lower()
        for product in ["necklace", "bracelet", "ring"]:
            if product in lower:
                return JewelryAction(product_choice=product), product
        return JewelryAction(product_choice="ring"), "ring"

    elif phase == "showroom":
        return JewelryAction(message=text), text

    return JewelryAction(), text


def get_model_action(client: OpenAI, step: int, obs, last_reward: float, history: List[str]) -> tuple[JewelryAction, str]:
    user_prompt = build_user_prompt(step, obs, last_reward, history)
    try:
        completion = client.chat.completions.create(
            model=MODEL_NAME,
            messages=[
                {"role": "system", "content": SYSTEM_PROMPT},
                {"role": "user", "content": user_prompt},
            ],
            temperature=TEMPERATURE,
            max_tokens=MAX_TOKENS,
            stream=False,
        )
        text = (completion.choices[0].message.content or "").strip()
        return get_action_from_text(obs.phase, text)
    except Exception as exc:
        print(f"[DEBUG] Model request failed: {exc}", flush=True)
        # Fallback actions
        if obs.phase == "market":
            return JewelryAction(market_action="buy", gold_qty=1.0), "buy 1.0"
        elif obs.phase == "warehouse":
            return JewelryAction(product_choice="ring"), "ring"
        else:
            return JewelryAction(message="I accept"), "I accept"



# ── SINGLE EPISODE RUNNER ──────────────────────

async def run_episode(client: OpenAI, task_name: str, env_name: str, base_url: str) -> float:
    """Run a single episode and return the final score."""
    history: List[str] = []
    rewards: List[float] = []
    steps_taken = 0
    score = 0.0
    success = False

    log_start(task=task_name, env=env_name, model=MODEL_NAME)

    try:
        env = JewelryShopEnv(base_url=base_url)

        result = await env.reset()
        obs = result.observation
        last_reward = 0.0

        for step in range(1, MAX_STEPS + 1):
            if result.done:
                break

            action, raw_action_str = get_model_action(client, step, obs, last_reward, history)
            current_phase = obs.phase

            result = await env.step(action)
            obs = result.observation

            reward = result.reward or 0.0
            done = result.done
            error = None

            rewards.append(reward)
            steps_taken = step
            last_reward = reward

            log_step(step=step, action=raw_action_str.replace('\n', ' '), reward=reward, done=done, error=error)
            history.append(f"Step {step} ({current_phase}): {raw_action_str!r} -> reward {reward:+.2f}")

            if done:
                break

        if rewards:
            score = rewards[-1]
        else:
            score = 0.0

        score = min(max(score, 0.0), 1.0)
        success = score >= SUCCESS_SCORE_THRESHOLD

    finally:
        try:
            await env.close()
        except Exception as e:
            print(f"[DEBUG] env.close() error: {e}", flush=True)
        log_end(success=success, steps=steps_taken, score=score, rewards=rewards)

    return score


# ── MAIN ───────────────────────────────────────

TASKS = [
    {"id": "market_timing", "env": "jewelry_shop_benchmark"},
    {"id": "demand_crafter", "env": "jewelry_shop_benchmark"},
    {"id": "profit_negotiator", "env": "jewelry_shop_benchmark"},
]

async def main() -> None:
    client = OpenAI(base_url=API_BASE_URL, api_key=API_KEY)
    # base_url = os.getenv("ENV_BASE_URL", "http://localhost:8000")
    base_url = os.getenv("ENV_BASE_URL", "https://huggingface.co/spaces/hard007ik/ShopManagerEng")

    for task in TASKS:
        await run_episode(client, task["id"], task["env"], base_url)


if __name__ == "__main__":
    asyncio.run(main())