import gradio as gr
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from PIL import Image
from io import BytesIO
import tempfile
import time
import os

def render_fullpage_screenshot(html_code):
    tmp_file = tempfile.NamedTemporaryFile(suffix=".html", delete=False)
    tmp_path = tmp_file.name
    tmp_file.write(html_code.encode('utf-8'))
    tmp_file.close()

    options = Options()
    options.add_argument("--headless")
    options.add_argument("--no-sandbox")
    options.add_argument("--disable-dev-shm-usage")
    options.add_argument("--force-device-scale-factor=1")

    try:
        driver = webdriver.Chrome(options=options)
        driver.set_window_size(1200, 800)
        driver.get("file://" + tmp_path)

        # ページロード待機
        WebDriverWait(driver, 10).until(
            EC.presence_of_element_located((By.TAG_NAME, "body"))
        )
        time.sleep(2)

        # 固定要素を強制的に「static」にして、重複しにくくする
        driver.execute_script(
            """
            const elems = document.querySelectorAll('*');
            for (const e of elems) {
                const style = window.getComputedStyle(e);
                if (style.position === 'fixed' || style.position === 'sticky') {
                    e.style.position = 'static';
                }
            }
            """
        )
        time.sleep(1)

        # ページ高さを取得
        viewport_height = driver.execute_script("return window.innerHeight")
        scroll_height = driver.execute_script("return document.body.scrollHeight")

        images = []
        current_position = 0

        while True:
            # スクリーンショット
            png = driver.get_screenshot_as_png()
            img = Image.open(BytesIO(png))
            images.append(img)

            # 最下部まで行ったら終了
            if current_position + viewport_height >= scroll_height:
                break

            # 次のスクロール位置へ移動
            current_position += viewport_height
            driver.execute_script(f"window.scrollTo(0, {current_position})")
            time.sleep(1)

        # 縦方向に結合
        total_width = max(img.width for img in images)
        total_height = sum(img.height for img in images)
        full_screenshot = Image.new('RGB', (total_width, total_height))

        current_y = 0
        for img in images:
            full_screenshot.paste(img, (0, current_y))
            current_y += img.height

    except Exception as e:
        return Image.new('RGB', (1, 1), color=(0, 0, 0))

    finally:
        driver.quit()
        if os.path.exists(tmp_path):
            os.remove(tmp_path)

    return full_screenshot

iface = gr.Interface(
    fn=render_fullpage_screenshot,
    inputs=gr.Textbox(lines=15, label="HTMLコード入力"),
    outputs=gr.Image(type="pil", label="フルページスクリーンショット"),
    title="Scrolling Screenshot (Remove Fixed Elements)",
    description="固定要素をstaticに変更して、重複を防ぎつつページ全体をキャプチャします。"
)

if __name__ == "__main__":
    iface.launch()