from fastapi import FastAPI, Request, File, UploadFile, HTTPException, Form, Query
from fastapi.responses import HTMLResponse, JSONResponse, FileResponse, RedirectResponse
from fastapi.staticfiles import StaticFiles
from jinja2 import Environment, FileSystemLoader, select_autoescape
from custom_logger import logger_config
from image.image_base import ImageBase
from pydantic import BaseModel
from image.converter import Converter
from image.remove_metadata import RemoveMetadata
from image.remove_background import RemoveBackground
from PDF.images_to_pdf import ImagesToPDF
import mimetypes
import os

app = FastAPI(title="Tools Collection", description="Collection of utility tools")

# Startup event to cleanup old files
@app.on_event("startup")
async def startup_cleanup():
    """Run cleanup of files older than 2 days on server startup"""
    try:
        image_base = ImageBase()
        deleted_count = image_base.cleanup_old_files(max_age_days=2)
        if deleted_count > 0:
            logger_config.info(f"Startup cleanup: Removed {deleted_count} old file(s)")
        else:
            logger_config.info("Startup cleanup: No old files to remove")
    except Exception as e:
        logger_config.warning(f"Startup cleanup failed: {e}")

# Mount static/image at /image
app.mount("/image/javascript", StaticFiles(directory="image/javascript"), name="image")

# Templates
template_dirs = [".", "./image"]
env = Environment(
    loader=FileSystemLoader(template_dirs),
    autoescape=select_autoescape(['html', 'xml'])
)

# Available features
FEATURES = {
    "image": {
        "name": "Image Tools",
        "description": "HEIC to PNG/JPG conversion and metadata removal",
        "icon": "🖼️",
        "features": ["convert", "remove_metadata", "remove_background"],
        "folder": "image",
        "tags": ["image", "heic", "png", "jpg", "convert", "metadata"]
    },
    "pdf": {
        "name": "PDF Tools", 
        "description": "Convert images to PDF, merge PDFs, and more",
        "icon": "📄",
        "features": ["images_to_pdf"],
        "folder": "pdf",
        "tags": ["pdf", "merge", "convert", "images", "document"]
    },

    "video": {
        "name": "Video Tools",
        "description": "Video player with playlist management - add videos and convert via ⋮ menu",
        "icon": "🎬",
        "features": ["player"],
        "folder": "video",
        "tags": ["video", "player", "media", "watch", "convert", "playlist"]
    }
}

# Routes
@app.get("/", response_class=HTMLResponse)
async def index(request: Request):
    template = env.get_template("index.html")  # From tool/
    html_content = template.render(request=request)
    return HTMLResponse(content=html_content)

@app.get("/image/convert", response_class=HTMLResponse)
async def image_tools(request: Request):
    template = env.get_template("image/convert.html")  # From tool/image/
    html_content = template.render(request=request)
    return HTMLResponse(content=html_content)

@app.get("/image/remove_metadata", response_class=HTMLResponse)
async def image_tools(request: Request):
    template = env.get_template("image/remove_metadata.html")  # From tool/image/
    html_content = template.render(request=request)
    return HTMLResponse(content=html_content)

@app.get("/image/remove_background", response_class=HTMLResponse)
async def image_tools(request: Request):
    template = env.get_template("image/remove_background.html")  # From tool/image/
    html_content = template.render(request=request)
    return HTMLResponse(content=html_content)

@app.get("/video/player")
async def video_player():
    return RedirectResponse(url="https://jebin2.github.io/JellyJump/player.html", status_code=302)

@app.get("/pdf/images_to_pdf", response_class=HTMLResponse)
async def pdf_images_to_pdf(request: Request):
    template = env.get_template("PDF/images_to_pdf.html")
    html_content = template.render(request=request)
    return HTMLResponse(content=html_content)

@app.post("/pdf/upload")
async def upload_pdf_image(
    id: str = Form(...),
    image: UploadFile = File(...)
):
    try:
        converter = ImagesToPDF()
        contents = await image.read()
        converter.upload(id, contents)
        
        return JSONResponse({
            "success": True,
            "message": "Image uploaded successfully"
        })
    except Exception as e:
        logger_config.error(f"Upload failed: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

@app.post("/pdf/convert")
async def convert_images_to_pdf(
    ids: str = Form(...),
    output_name: str = Form("output.pdf")
):
    try:
        # Parse comma-separated IDs
        image_ids = [id.strip() for id in ids.split(',') if id.strip()]
        
        converter = ImagesToPDF()
        output_path = converter.convert_to_pdf(image_ids, output_name)
        
        if output_path is None:
            raise ValueError("PDF conversion failed")
        
        return JSONResponse({
            "success": True,
            "message": "PDF created successfully",
            "new_filename": output_path.split("/")[-1]
        })
    except Exception as e:
        logger_config.error(f"PDF conversion failed: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

@app.get("/pdf/download")
async def download_pdf(id: str = Query(...)):
    try:
        converter = ImagesToPDF()
        file_path = f"{converter.output_dir}/{id}"
        if os.path.exists(file_path):
            media_type, _ = mimetypes.guess_type(file_path)
            return FileResponse(
                path=file_path,
                media_type=media_type or "application/pdf",
                filename=id
            )
        raise HTTPException(status_code=404, detail="File not found")
    except Exception as e:
        logger_config.error(f"Download failed: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

@app.post("/image/upload")
async def upload_image(
    id: str = Form(...),
    image: UploadFile = File(...)
):
    try:
        image_base = ImageBase()
        image_base.upload(id, image)
        
        # Return success response
        return JSONResponse({
            "success": True,
            "message": "Image uploaded successfully"
        })
    
    except ValueError as ve:
        logger_config.error(f"Validation error: {str(ve)}")
        raise HTTPException(
            status_code=400,
            detail=str(ve)
        )
    except Exception as e:
        logger_config.error(f"Unexpected error during upload: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=f"Internal server error: {str(e)}"
        )

@app.post("/image/convert")
async def convert_image(
    id: str = Form(...),
    to_format: str = Form(...),
    quality: int = Form(100),
    scale: float = Form(1.0)
):
    try:
        # Check if input is SVG - PIL cannot read SVG files
        if id.lower().endswith('.svg'):
            raise ValueError("SVG files cannot be converted. SVG is only available as an output format.")
        
        converter = Converter()
        output_path = converter.convert_image(id, to_format, quality=quality, scale=scale)
        
        # Check if conversion failed
        if output_path is None:
            raise ValueError("Image conversion failed. The file may be corrupted or in an unsupported format.")
        
        # Return success response
        return JSONResponse({
            "success": True,
            "message": "Image converted successfully",
            "new_filename": output_path.split("/")[-1]
        })
    
    except ValueError as ve:
        logger_config.error(f"Validation error: {str(ve)}")
        raise HTTPException(
            status_code=400,
            detail=str(ve)
        )
    except Exception as e:
        logger_config.error(f"Unexpected error during upload: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=f"Internal server error: {str(e)}"
        )

@app.post("/image/remove_metadata")
async def remove_metadata(
    id: str = Form(...)
):
    try:
        # Check if input is SVG - PIL cannot read SVG files
        if id.lower().endswith('.svg'):
            raise ValueError("SVG files cannot be processed. SVG is a vector format without embedded metadata.")
        
        removeMetadata = RemoveMetadata()
        output_path, metadata = removeMetadata.process(id)
        
        # Check if processing failed
        if output_path is None:
            raise ValueError("Metadata removal failed. The file may be corrupted or in an unsupported format.")
        
        # Return success response
        return JSONResponse({
            "success": True,
            "message": "Metadata removed successfully",
            "new_filename": output_path.split("/")[-1],
            "other_info": metadata
        })
    
    except ValueError as ve:
        logger_config.error(f"Validation error: {str(ve)}")
        raise HTTPException(
            status_code=400,
            detail=str(ve)
        )
    except Exception as e:
        logger_config.error(f"Unexpected error during remove_metadata: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=f"Internal server error: {str(e)}"
        )

@app.post("/image/remove_background")
async def remove_background(
    id: str = Form(...)
):
    try:
        removeBackground = RemoveBackground()
        output_path = removeBackground.process(id)
        
        # Return success response
        return JSONResponse({
            "success": True,
            "message": "Image uploaded successfully",
            "new_filename": output_path.split("/")[-1]
        })
    
    except ValueError as ve:
        logger_config.error(f"Validation error: {str(ve)}")
        raise HTTPException(
            status_code=400,
            detail=str(ve)
        )
    except Exception as e:
        logger_config.error(f"Unexpected error during remove_background: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=f"Internal server error: {str(e)}"
        )

@app.get("/image/download")
async def download_converted_image(
    id: str = Query(...)
):
    try:
        image_base = ImageBase()
        file_path = image_base.download_url(id)
        
        mime_type, _ = mimetypes.guess_type(file_path)

        return FileResponse(file_path, media_type=mime_type, filename=id)

    except ValueError as ve:
        logger_config.error(f"Validation error: {str(ve)}")
        raise HTTPException(
            status_code=400,
            detail=str(ve)
        )
    except Exception as e:
        logger_config.error(f"Unexpected error during upload: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=f"Internal server error: {str(e)}"
        )

class DeleteRequest(BaseModel):
    ids: list[str]

@app.post("/image/delete")
async def delete_images(request: DeleteRequest):
    try:
        image_base = ImageBase()
        image_base.delete(request.ids)
        
        # Return success response
        return JSONResponse({
            "success": True,
            "message": "Image deleted successfully"
        })
    
    except ValueError as ve:
        logger_config.error(f"Validation error: {str(ve)}")
        raise HTTPException(
            status_code=400,
            detail=str(ve)
        )
    except Exception as e:
        logger_config.error(f"Unexpected error during upload: {str(e)}")
        raise HTTPException(
            status_code=500,
            detail=f"Internal server error: {str(e)}"
        )

@app.get("/api/features")
async def get_features():
    """Get available features"""
    return {"features": FEATURES}

@app.get("/api/search")
async def search_features(q: str = ""):
    """Search features by name, description, or tags"""
    if not q:
        return {"features": FEATURES}
    
    q = q.lower()
    filtered_features = {}
    
    for key, feature in FEATURES.items():
        # Search in name, description, and tags
        search_text = f"{feature['name']} {feature['description']} {' '.join(feature.get('tags', []))}".lower()
        if q in search_text:
            filtered_features[key] = feature
    
    return {"features": filtered_features}

@app.get("/api/status")
async def get_feature_status():
    """Get feature status"""
    features_status = {}
    for key in FEATURES.keys():
        features_status[key] = {
            "feature_name": None,
            "is_busy": False,
            "process_id": None
        }
    
    return features_status

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