#!/usr/bin/env python3
"""
TeamForge Baseline Inference
Runs a language-model agent through all TeamForge tasks.

Usage:
    export GROQ_API_KEY=gsk_...
    export API_BASE_URL=https://api.groq.com/openai/v1
    export MODEL_NAME=llama3-8b-8192

    python baseline_inference.py [--task TASK_ID] [--seed 42]

Outputs structured logs: [START] [STEP] [ACTION] [OBS] [END]
"""

from __future__ import annotations

import argparse
import json
import os
import sys
import time
from typing import Any, Dict, List, Optional

from openai import OpenAI

# Local imports
from environment import TeamForgeEnv
from models import (
    Action,
    Commit,
    EditFile,
    GenerateReview,
    Observation,
    PlanStep,
    RequestIteration,
    RunLint,
    RunTests,
    SelfReflect,
)
from tasks import ALL_TASK_IDS


# ─────────────────────────────────────────────
# CONFIGURATION
# ─────────────────────────────────────────────

API_BASE_URL = os.getenv("API_BASE_URL", "https://api.groq.com/openai/v1")
MODEL_NAME = os.getenv("MODEL_NAME", "llama3-8b-8192")
GROQ_API_KEY = os.getenv("GROQ_API_KEY", "")
OPENAI_API_KEY = GROQ_API_KEY
MAX_RETRIES = 3
TEMPERATURE = 0.2


# ─────────────────────────────────────────────
# SYSTEM PROMPT
# ─────────────────────────────────────────────

SYSTEM_PROMPT = """
You are TeamForge — an autonomous AI software engineer.
You work in structured phases: PLAN → CODE → TEST → REVIEW → REFLECT.

At each step, you receive an observation (current repo state, test results, lint output)
and must return exactly ONE action as a JSON object.

Available action types and their required fields:

1. plan_step:
   {"type": "plan_step", "step_number": <int>, "description": "<str>", "estimated_effort": "low|medium|high"}

2. edit_file:
   {"type": "edit_file", "file_path": "<str>", "content": "<full file content>", "reason": "<str>"}

3. run_tests:
   {"type": "run_tests", "timeout_seconds": 30}

4. run_lint:
   {"type": "run_lint", "fix": false}

5. generate_review:
   {"type": "generate_review", "focus_areas": ["correctness", "style", "performance"], "review_text": "<detailed review>"}

6. commit:
   {"type": "commit", "message": "<conventional commit message>"}

7. self_reflect:
   {"type": "self_reflect", "what_went_well": "<str>", "what_to_improve": "<str>"}

8. request_iteration:
   {"type": "request_iteration", "reason": "<str>", "target_issues": ["<issue1>", "<issue2>"]}

Rules:
- NEVER modify test files (files whose path contains "test")
- Always plan first (at least 2 plan_step actions)
- After fixing code, always run_tests before committing
- Always generate_review before final commit
- Return ONLY the JSON object, no markdown, no explanation
""".strip()


# ─────────────────────────────────────────────
# AGENT
# ─────────────────────────────────────────────

class TeamForgeAgent:
    """LLM-powered agent that drives the TeamForge environment."""

    def __init__(self, client: OpenAI):
        self.client = client
        self.history: List[Dict[str, str]] = []

    def reset(self) -> None:
        self.history = []

    def act(self, obs: Observation) -> Optional[Action]:
        """Given an observation, call the LLM and parse the action."""
        user_message = self._obs_to_prompt(obs)
        self.history.append({"role": "user", "content": user_message})

        for attempt in range(MAX_RETRIES):
            try:
                response = self.client.chat.completions.create(
                    model=MODEL_NAME,
                    messages=[
                        {"role": "system", "content": SYSTEM_PROMPT},
                        *self.history,
                    ],
                    temperature=TEMPERATURE,
                    max_tokens=2000,
                )
                content = response.choices[0].message.content.strip()
                self.history.append({"role": "assistant", "content": content})

                action = self._parse_action(content)
                return action

            except Exception as exc:
                print(f"[WARN] LLM call attempt {attempt+1} failed: {exc}")
                time.sleep(2 ** attempt)

        return None

    def _obs_to_prompt(self, obs: Observation) -> str:
        """Convert observation to a compact text prompt."""
        lines = [
            f"## Task: {obs.task_id} ({obs.difficulty.value})",
            f"Step {obs.step_number}/{obs.max_steps} | Phase: {obs.phase.value}",
            f"Cumulative reward: {obs.cumulative_reward:.3f}",
            "",
            f"### Task Description\n{obs.task_description[:600]}",
            "",
        ]

        # Last action result
        if obs.last_action_type:
            lines += [
                f"### Last Action: {obs.last_action_type} → {obs.last_action_status.value}",
                f"```\n{obs.last_action_output[:800]}\n```",
                "",
            ]

        # Test results
        if obs.test_results:
            tr = obs.test_results
            lines += [
                f"### Tests: {tr.passed} passed / {tr.failed} failed / {tr.errors} errors",
                f"```\n{tr.output[:600]}\n```",
                "",
            ]

        # Lint
        if obs.lint_results:
            lr = obs.lint_results
            lines += [
                f"### Lint: {lr.violations} violations (score={lr.score:.2f})",
            ]

        # Repo files (show names + first 200 chars of each)
        lines.append("### Repo Files")
        for f in obs.repo_files[:8]:
            lines.append(f"**{f.path}** ({f.size_bytes} bytes)")
            if f.size_bytes < 4000:
                lines.append(f"```python\n{f.content[:800]}\n```")

        # Plan so far
        if obs.plan:
            lines.append(f"### Plan ({len(obs.plan)} steps)")
            for step in obs.plan[-3:]:
                lines.append(f"  {step.step_number}. {step.description}")

        lines.append("\n### What is your next action? Return ONLY a JSON object.")
        return "\n".join(lines)

    def _parse_action(self, text: str) -> Optional[Action]:
        """Parse LLM output as an Action model."""
        # Strip markdown fences if present
        text = text.strip()
        if text.startswith("```"):
            lines = text.split("\n")
            text = "\n".join(lines[1:-1] if lines[-1].strip() == "```" else lines[1:])

        data = json.loads(text)
        action_type = data.get("type")

        dispatch = {
            "plan_step": PlanStep,
            "edit_file": EditFile,
            "run_tests": RunTests,
            "run_lint": RunLint,
            "generate_review": GenerateReview,
            "commit": Commit,
            "self_reflect": SelfReflect,
            "request_iteration": RequestIteration,
        }

        cls = dispatch.get(action_type)
        if cls is None:
            print(f"[WARN] Unknown action type: {action_type}")
            return None

        return cls(**data)


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

def run_episode(
    env: TeamForgeEnv,
    agent: TeamForgeAgent,
    task_id: str,
    verbose: bool = True,
) -> Dict[str, Any]:
    """Run a single episode and return results."""
    agent.reset()
    obs = env.reset(task_id)
    episode_log = []

    print(f"\n{'='*60}")
    print(f"[START] task={task_id} | model={MODEL_NAME}")
    print(f"{'='*60}")

    episode_log.append({
        "event": "START",
        "task_id": task_id,
        "model": MODEL_NAME,
    })

    while not obs.done:
        action = agent.act(obs)
        if action is None:
            print("[ERROR] Agent returned no action. Stopping.")
            break

        if verbose:
            print(f"[STEP {obs.step_number + 1}] action={action.type}")

        obs = env.step(action)

        step_log = {
            "event": "STEP",
            "step": obs.step_number,
            "action_type": obs.last_action_type,
            "action_status": obs.last_action_status.value,
            "reward": obs.reward,
            "cumulative_reward": obs.cumulative_reward,
            "tests_passed": obs.test_results.passed if obs.test_results else 0,
            "tests_failed": obs.test_results.failed if obs.test_results else 0,
            "done": obs.done,
        }
        episode_log.append(step_log)

        if verbose:
            print(
                f"  reward={obs.reward:.4f} cum={obs.cumulative_reward:.4f} "
                f"tests={step_log['tests_passed']}p/{step_log['tests_failed']}f "
                f"done={obs.done}"
            )

    # Grade the episode
    result = env.grade()

    print(f"\n{'='*60}")
    print(f"[END] task={task_id}")
    print(f"  final_score     = {result.final_score:.4f}")
    print(f"  test_pass_rate  = {result.test_pass_rate:.4f}")
    print(f"  lint_score      = {result.lint_score:.4f}")
    print(f"  efficiency      = {result.efficiency_score:.4f}")
    print(f"  review_quality  = {result.review_quality:.4f}")
    print(f"  passed          = {result.passed}")
    print(f"{'='*60}\n")

    episode_log.append({
        "event": "END",
        "task_id": task_id,
        "final_score": result.final_score,
        "test_pass_rate": result.test_pass_rate,
        "lint_score": result.lint_score,
        "efficiency_score": result.efficiency_score,
        "review_quality": result.review_quality,
        "passed": result.passed,
        "total_steps": result.total_steps,
    })

    return {
        "task_id": task_id,
        "result": result.model_dump(),
        "log": episode_log,
    }


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

def main():
    parser = argparse.ArgumentParser(description="TeamForge Baseline Inference")
    parser.add_argument(
        "--task",
        choices=ALL_TASK_IDS + ["all"],
        default="all",
        help="Task ID to run, or 'all'",
    )
    parser.add_argument("--seed", type=int, default=42)
    parser.add_argument("--output", type=str, default="results.json")
    parser.add_argument("--verbose", action="store_true", default=True)
    args = parser.parse_args()

    if not OPENAI_API_KEY or OPENAI_API_KEY.startswith("sk-placeholder"):
        print("[ERROR] Set OPENAI_API_KEY environment variable.")
        sys.exit(1)

    client = OpenAI(api_key=GROQ_API_KEY, base_url=API_BASE_URL)
    env = TeamForgeEnv(log_dir="logs/")
    agent = TeamForgeAgent(client)

    tasks_to_run = ALL_TASK_IDS if args.task == "all" else [args.task]
    all_results = []

    for task_id in tasks_to_run:
        result = run_episode(env, agent, task_id, verbose=args.verbose)
        all_results.append(result)

    # Save results
    with open(args.output, "w") as f:
        json.dump(all_results, f, indent=2)
    print(f"\nResults saved to {args.output}")

    # Summary
    print("\n─── SUMMARY ───────────────────────────────────────────────")
    for r in all_results:
        res = r["result"]
        status = "✓ PASS" if res["passed"] else "✗ FAIL"
        print(
            f"{status} {r['task_id']:40s} "
            f"score={res['final_score']:.4f} "
            f"steps={res['total_steps']}"
        )


if __name__ == "__main__":
    main()