from fastapi import FastAPI as FastAPIApp, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
import uvicorn
import os
from hand import Hand
from typing import List, Optional

app = FastAPIApp()
hand = Hand()

class InputData(BaseModel):
    text: str
    bias: Optional[float] = 0.75
    style: Optional[int] = 9
    stroke_colors: Optional[List[str]] = ['black']
    stroke_widths: Optional[List[float]] = [2]

def validate_input(data: InputData):
    if len(data.text) > 75:
        raise ValueError("Text must be 75 characters or less")
    if not (0.5 <= data.bias <= 1.0):
        raise ValueError("Bias must be between 0.5 and 1.0")
    if not (0 <= data.style <= 12):
        raise ValueError("Style must be between 0 and 12")
    if len(data.stroke_colors) != len(data.text.split('\n')):
        raise ValueError("Number of stroke colors must match number of lines")
    if len(data.stroke_widths) != len(data.text.split('\n')):
        raise ValueError("Number of stroke widths must match number of lines")

@app.post("/synthesize")
def synthesize(data: InputData):
    try:
        validate_input(data)
        lines = data.text.split('\n')
        biases = [data.bias] * len(lines)
        styles = [data.style] * len(lines)
        
        hand.write(
            filename='img/output.svg',
            lines=lines,
            biases=biases,
            styles=styles,
            stroke_colors=data.stroke_colors,
            stroke_widths=data.stroke_widths
        )
        return {"result": "Handwriting synthesized successfully", "output_file": "img/output.svg"}
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))

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