"""Instructor API endpoint for receiving repo submissions."""
from datetime import datetime

from fastapi import FastAPI, HTTPException
from fastapi.responses import JSONResponse

from instructor.database import Database
from shared.logger import setup_logger
from shared.models import RepoSubmission

logger = setup_logger(__name__)

app = FastAPI(
    title="LLM Code Deployment - Instructor API",
    description="API endpoint for receiving and validating repo submissions",
    version="1.0.0",
)

# Initialize database
db = Database()


@app.on_event("startup")
async def startup_event():
    """Create database tables on startup."""
    db.create_tables()
    logger.info("Database initialized")


@app.post("/api/evaluate")
async def evaluate_submission(submission: RepoSubmission) -> JSONResponse:
    """Receive and validate repo submission.

    Args:
        submission: Repository submission from student

    Returns:
        HTTP 200 on success, HTTP 400 on validation failure
    """
    logger.info(
        f"Received submission: {submission.email}, "
        f"task {submission.task}, round {submission.round}"
    )

    # Validate submission against task record
    task = db.get_task_by_nonce(submission.nonce)

    if not task:
        logger.error(f"Invalid nonce: {submission.nonce}")
        raise HTTPException(status_code=400, detail="Invalid nonce")

    # Validate fields match
    if task.email != submission.email:
        logger.error(f"Email mismatch: expected {task.email}, got {submission.email}")
        raise HTTPException(status_code=400, detail="Email mismatch")

    if task.task != submission.task:
        logger.error(f"Task mismatch: expected {task.task}, got {submission.task}")
        raise HTTPException(status_code=400, detail="Task mismatch")

    if task.round != submission.round:
        logger.error(f"Round mismatch: expected {task.round}, got {submission.round}")
        raise HTTPException(status_code=400, detail="Round mismatch")

    # Check if already submitted
    try:
        existing = db.get_session().query(db.Repo).filter_by(nonce=submission.nonce).first()
        if existing:
            logger.warning(f"Duplicate submission for nonce {submission.nonce}")
            return JSONResponse(
                status_code=200,
                content={
                    "status": "duplicate",
                    "message": "Submission already received",
                },
            )
    finally:
        db.get_session().close()

    # Add to repos table
    try:
        repo = db.add_repo(
            {
                "timestamp": datetime.utcnow(),
                "email": submission.email,
                "task": submission.task,
                "round": submission.round,
                "nonce": submission.nonce,
                "repo_url": submission.repo_url,
                "commit_sha": submission.commit_sha,
                "pages_url": submission.pages_url,
            }
        )

        logger.info(
            f"Added repo submission: {submission.task}, round {submission.round}, "
            f"repo {submission.repo_url}"
        )

        return JSONResponse(
            status_code=200,
            content={
                "status": "success",
                "message": "Submission received and queued for evaluation",
                "repo_id": repo.id,
            },
        )

    except Exception as e:
        logger.error(f"Failed to add repo submission: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail="Internal server error")


@app.get("/api/submissions/{email}")
async def get_submissions(email: str) -> JSONResponse:
    """Get all submissions for an email.

    Args:
        email: Student email

    Returns:
        List of submissions
    """
    repos = db.get_repos(email=email)
    return JSONResponse(content=[repo.to_dict() for repo in repos])


@app.get("/api/results/{email}")
async def get_results(email: str) -> JSONResponse:
    """Get all evaluation results for an email.

    Args:
        email: Student email

    Returns:
        List of evaluation results
    """
    results = db.get_results(email=email)
    return JSONResponse(content=[result.to_dict() for result in results])


@app.get("/health")
async def health_check() -> JSONResponse:
    """Health check endpoint.

    Returns:
        Health status
    """
    return JSONResponse(
        content={
            "status": "healthy",
            "timestamp": datetime.utcnow().isoformat(),
        }
    )


if __name__ == "__main__":
    import uvicorn

    from shared.config import settings

    logger.info(f"Starting Instructor API on port {settings.instructor_api_port}")
    uvicorn.run(
        "instructor.api:app",
        host="0.0.0.0",
        port=settings.instructor_api_port,
        reload=True,
    )