import os
from fastapi import FastAPI, UploadFile, File, Form, HTTPException
from fastapi.responses import JSONResponse
from dotenv import load_dotenv

from .core.analyzer import quick_analyze
from .core.reviewer import review_single_file
from .utils.file_utils import save_upload_temp, read_file_text
from .models.schemas import ReviewResponse

load_dotenv()
app = FastAPI(title="Code Review Agent v0.1", description="Single-file code review using MiniMax-M2 (Ollama).")

@app.post("/review/file", response_model=ReviewResponse)
async def review_file(file: UploadFile = File(...), persona: str = Form("general")):
    if not file.filename:
        raise HTTPException(status_code=400, detail="Missing filename")
    temp_path = save_upload_temp(file)
    code = read_file_text(temp_path)
    ext = os.path.splitext(file.filename)[1].lower()
    language = "python" if ext in (".py",) else "unknown"
    analyzer_evidence = quick_analyze(temp_path, language)
    review = review_single_file(temp_path, file.filename, code, analyzer_evidence, persona=persona)
    try: os.remove(temp_path)
    except OSError: pass
    return JSONResponse(status_code=200, content=review.dict())

@app.get("/health")
async def health():
    return {"status": "ok", "model": os.getenv("OLLAMA_MODEL", "Minimax-M2"), "engine": "Ollama"}

@app.get("/")
async def root():
    return {
        "message": "Welcome to Code Review Agent v0.1",
        "usage": {
            "endpoint": "/review/file",
            "method": "POST",
            "params": {"file": "upload your source file", "persona": "general|security|performance|style"},
            "example": "curl -F 'file=@example.py' -F 'persona=security' http://localhost:8080/review/file"
        }
    }