"""Round 2 task generation and distribution script."""
import json
from datetime import datetime

import httpx

from instructor.database import Database
from instructor.task_templates import TaskTemplateManager
from shared.config import settings
from shared.logger import setup_logger
from shared.models import Attachment, TaskRequest
from shared.utils import generate_nonce

logger = setup_logger(__name__)


class Round2TaskGenerator:
    """Generate and send round 2 tasks to students."""

    def __init__(self) -> None:
        """Initialize task generator."""
        self.db = Database()
        self.template_manager = TaskTemplateManager()

    def get_round1_repos(self) -> list[dict]:
        """Get all round 1 repository submissions.

        Returns:
            List of repo dictionaries
        """
        repos = []
        session = self.db.get_session()
        try:
            round1_repos = session.query(self.db.Repo).filter_by(round=1).all()
            repos = [repo.to_dict() for repo in round1_repos]
        finally:
            session.close()

        logger.info(f"Found {len(repos)} round 1 repos")
        return repos

    def generate_round2_task(self, repo: dict) -> tuple[TaskRequest, dict]:
        """Generate round 2 task for a repo.

        Args:
            repo: Round 1 repo submission

        Returns:
            Tuple of (task_request, submission_data) or None if skipped
        """
        email = repo["email"]
        task_id = repo["task"]

        # Check if round 2 task already exists
        if self.db.task_exists(email, task_id, round=2):
            logger.info(f"Round 2 task already exists for {email}/{task_id}, skipping")
            return None

        # Get the round 1 task to find the template
        session = self.db.get_session()
        try:
            round1_task = (
                session.query(self.db.Task)
                .filter_by(email=email, task=task_id, round=1)
                .first()
            )

            if not round1_task:
                logger.warning(f"No round 1 task found for {email}/{task_id}")
                return None

            # Extract template ID from task ID
            template_id = task_id.rsplit("-", 1)[0]

            # Generate round 2 task from same template
            task_data = self.template_manager.generate_task(
                email, template_id=template_id, round_num=2
            )

            # Create task request
            nonce = generate_nonce()
            attachments = [Attachment(**att) for att in task_data["attachments"]]

            task_request = TaskRequest(
                email=email,
                secret=round1_task.secret,
                task=task_id,  # Keep same task ID
                round=2,
                nonce=nonce,
                brief=task_data["brief"],
                checks=task_data["checks"],
                evaluation_url=settings.evaluation_api_url,
                attachments=attachments,
            )

            submission_data = {"endpoint": round1_task.endpoint, "secret": round1_task.secret}

            logger.info(f"Generated round 2 task for {email}: {task_id}")
            return task_request, submission_data

        except Exception as e:
            logger.error(f"Error generating round 2 task for {email}/{task_id}: {e}")
            return None
        finally:
            session.close()

    async def send_task_request(
        self, task_request: TaskRequest, submission: dict
    ) -> int:
        """Send task request to student endpoint.

        Args:
            task_request: Task request to send
            submission: Submission data with endpoint

        Returns:
            HTTP status code
        """
        endpoint = submission["endpoint"]
        logger.info(f"Sending round 2 task to {endpoint}")

        try:
            async with httpx.AsyncClient(timeout=30.0) as client:
                response = await client.post(
                    endpoint,
                    json=task_request.model_dump(),
                    headers={"Content-Type": "application/json"},
                )

                status_code = response.status_code
                logger.info(
                    f"Round 2 task sent to {endpoint}: "
                    f"status {status_code}, response: {response.text[:200]}"
                )

                return status_code

        except Exception as e:
            logger.error(f"Failed to send round 2 task to {endpoint}: {e}")
            return 0

    def save_task_record(
        self, task_request: TaskRequest, submission: dict, status_code: int
    ) -> None:
        """Save task record to database.

        Args:
            task_request: Task request
            submission: Submission data
            status_code: HTTP status code from response
        """
        task_data = {
            "timestamp": datetime.utcnow(),
            "email": task_request.email,
            "task": task_request.task,
            "round": task_request.round,
            "nonce": task_request.nonce,
            "brief": task_request.brief,
            "attachments": json.dumps([att.model_dump() for att in task_request.attachments]),
            "checks": json.dumps(task_request.checks),
            "evaluation_url": task_request.evaluation_url,
            "endpoint": submission["endpoint"],
            "statuscode": status_code,
            "secret": submission["secret"],
        }

        self.db.add_task(task_data)
        logger.info(f"Saved round 2 task record: {task_request.task}")

    async def process_repo(self, repo: dict) -> None:
        """Process a single repo for round 2.

        Args:
            repo: Repo submission data
        """
        try:
            # Generate task
            result = self.generate_round2_task(repo)
            if result is None:
                return  # Already processed or error

            task_request, submission = result

            # Send task
            status_code = await self.send_task_request(task_request, submission)

            # Save record
            self.save_task_record(task_request, submission, status_code)

            if status_code == 200:
                logger.info(f"Successfully sent round 2 task to {repo['email']}")
            else:
                logger.warning(
                    f"Failed to send round 2 task to {repo['email']}: status {status_code}"
                )

        except Exception as e:
            logger.error(f"Error processing repo {repo['task']}: {e}", exc_info=True)

    async def run(self) -> None:
        """Run round 2 task generation."""
        logger.info("Starting round 2 task generation")

        # Get round 1 repos
        repos = self.get_round1_repos()

        if not repos:
            logger.error("No round 1 repos to process")
            return

        # Process each repo
        for repo in repos:
            await self.process_repo(repo)

        logger.info("Round 2 task generation complete")


async def main():
    """Main entry point."""
    generator = Round2TaskGenerator()
    await generator.run()


if __name__ == "__main__":
    import asyncio

    asyncio.run(main())