from fastapi import FastAPI
from fastapi.responses import Response
from PIL import Image, ImageDraw, ImageFont
import io
import textwrap

app = FastAPI()

@app.get("/")
def home():
    return {
        "creator": "Muhammad Farel",
        "endpoint": "/ustadz?text=halo"
    }

@app.get("/ustadz")
def ustadz(text: str = "Contoh Soalan"):

    img = Image.open("template.jpg").convert("RGB")
    draw = ImageDraw.Draw(img)

    width, height = img.size

    # area kotak putih (sesuaikan kalau perlu)
    box_x1 = 200
    box_y1 = 150
    box_x2 = width - 200
    box_y2 = 450

    box_width = box_x2 - box_x1
    box_height = box_y2 - box_y1

    # cari font terbesar yang muat
    font_size = 80

    while font_size > 20:

        font = ImageFont.truetype("DejaVuSans-Bold.ttf", font_size)

        lines = textwrap.wrap(text, width=25)

        total_height = 0

        for line in lines:
            bbox = draw.textbbox((0,0), line, font=font)
            total_height += bbox[3] - bbox[1] + 10

        if total_height <= box_height:
            break

        font_size -= 2

    # posisi tengah vertikal
    y = box_y1 + (box_height - total_height) / 2

    for line in lines:

        bbox = draw.textbbox((0,0), line, font=font)
        text_width = bbox[2] - bbox[0]

        x = box_x1 + (box_width - text_width) / 2

        draw.text((x,y), line, fill="black", font=font)

        y += (bbox[3] - bbox[1]) + 10

    buffer = io.BytesIO()
    img.save(buffer, format="PNG")

    return Response(buffer.getvalue(), media_type="image/png")