import PySimpleGUI as sg
from PIL import Image, ImageDraw, ImageFilter, ImageFont, ImageOps
from io import BytesIO

# Globals 


def update_image(original, title, subtitle):
    """Render new title and title preview
    renders text on full sized slide
    make half sized copy for preview and fill top/bottom with white.
    """
    image = original
    font1 = ImageFont.truetype('tahomabd.ttf', 50)
    font2 = ImageFont.truetype('tahomabd.ttf', 38)
    draw = ImageDraw.Draw(image)
    draw.text((20,520), title, (255,255,255), font=font1)
    draw.text((20,588), subtitle, (255,255,255), font=font2)
    return image

def update_thumbnail(image):
    """genreate thumbnail from original image"""
    """454-720 scales to 227-360"""
    scaled = image.resize((720, 360))
    # white = (255, 255, 255, 255)
    # ImageDraw.floodfill(scaled, (5, 5), value=white)
    # ImageDraw.floodfill(scaled, (5, 355), value=white)
    thumbnail = scaled.crop((0, 255, 719, 359))
    return thumbnail


def build_layout(title, subtitle, thumbnail):
    control_col = sg.Column([
        [
            sg.Frame('Title',
                     layout = [[sg.Input(title, key = '-TITLE-')]]
                    )],
        [
            sg.Frame('subtitle',
                     layout = [[sg.Input(subtitle, key = '-SUBTITLE-')]]
                    )],
        [
            sg.Button('Save image', key= '-SAVE-')],
    ])

    bio = BytesIO()
    thumbnail.save(bio, format = 'PNG')
    image_col = sg.Column([[sg.Image(data=bio.getvalue(), key = '-IMAGE-')]])
    layout = [[control_col,image_col]]
    return layout

def main():
    title = 'Pastor Shane Wallis'
    subtitle = 'Bible Stduy Wednesday June 1st, 2022'
    image_path = 'blank_title.png'
    original = Image.open(image_path)
    image = update_image(original, title, subtitle)
    thumbnail = update_thumbnail(image)

    layout = build_layout(title, subtitle, thumbnail)
    window = sg.Window('Harvest Christian Assembly Message Title', layout)

    while True:
        event, values = window.read(timeout=50)
        if event == sg.WIN_CLOSED:
            break

        if event == "-SAVE-":
            save_path = sg.popup_get_file('Save',
                                          save_as = True,
                                          no_window = True) + '.png'
            image.save(save_path, 'PNG')

    window.close()

if __name__ == "__main__":
    main()