from fastapi import FastAPI, HTTPException, Query
from fastapi.middleware.cors import CORSMiddleware
import uvicorn
import os
from typing import List, Dict, Any, Optional
from db.wiki_db_sqlite import WikiDBSqlite

app = FastAPI(title="Wiki API Server")

# Add CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Global database connection
db = None

@app.on_event("startup")
async def startup_db_client():
    global db
    db_path = os.environ.get("WIKI_DB_PATH")
    if not db_path:
        raise ValueError("WIKI_DB_PATH environment variable not set")
    db = WikiDBSqlite(db_path)

@app.get("/article_count")
async def get_article_count() -> Dict[str, int]:
    """Get the number of articles in the database"""
    return {"count": db.get_article_count()}

@app.get("/article_titles")
async def get_article_titles() -> Dict[str, List[str]]:
    """Get all article titles"""
    return {"titles": db.get_all_article_titles()}

@app.get("/article")
async def get_article(title: str = Query(..., description="Article title")) -> Dict[str, Any]:
    """Get article data by title"""
    article = db.get_article(title)
    if not article:
        raise HTTPException(status_code=404, detail=f"Article '{title}' not found")
    return article

@app.get("/article_exists")
async def article_exists(title: str = Query(..., description="Article title")) -> Dict[str, bool]:
    """Check if an article exists"""
    return {"exists": db.article_exists(title)}

@app.get("/article_text")
async def get_article_text(title: str = Query(..., description="Article title")) -> Dict[str, str]:
    """Get the text of an article"""
    if not db.article_exists(title):
        raise HTTPException(status_code=404, detail=f"Article '{title}' not found")
    return {"text": db.get_article_text(title)}

@app.get("/article_links")
async def get_article_links(title: str = Query(..., description="Article title")) -> Dict[str, List[str]]:
    """Get the links of an article"""
    if not db.article_exists(title):
        raise HTTPException(status_code=404, detail=f"Article '{title}' not found")
    return {"links": db.get_article_links(title)}

if __name__ == "__main__":
    uvicorn.run("api_server:app", host="0.0.0.0", port=8000, reload=True)