#
# Copyright 2016 The BigDL Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# This file is adapted from
# https://github.com/oobabooga/text-generation-webui/blob/main/extensions/gallery/script.py


from pathlib import Path

import gradio as gr

from modules.html_generator import get_image_cache
from modules.shared import gradio, settings


cards = []


def generate_css():
    css = """
      .highlighted-border {
        border-color: rgb(249, 115, 22) !important;
      }

      .character-gallery > .gallery {
        margin: 1rem 0;
        display: grid !important;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        grid-column-gap: 0.4rem;
        grid-row-gap: 1.2rem;
      }

      .character-gallery > .label {
        display: none !important;
      }

      .character-gallery button.gallery-item {
        display: contents;
      }

      .character-container {
        cursor: pointer;
        text-align: center;
        position: relative;
        opacity: 0.85;
      }

      .character-container:hover {
        opacity: 1;
      }

      .character-container .placeholder, .character-container img {
        width: 150px;
        height: 200px;
        background-color: gray;
        object-fit: cover;
        margin: 0 auto;
        border-radius: 1rem;
        border: 3px solid white;
        box-shadow: 3px 3px 6px 0px rgb(0 0 0 / 50%);
      }

      .character-name {
        margin-top: 0.3rem;
        display: block;
        font-size: 1.2rem;
        font-weight: 600;
        overflow-wrap: anywhere;
      }
    """
    return css


def generate_html():
    global cards
    cards = []
    # Iterate through files in image folder
    for file in sorted(Path("characters").glob("*")):
        if file.suffix in [".json", ".yml", ".yaml"]:
            character = file.stem
            container_html = '<div class="character-container">'
            image_html = "<div class='placeholder'></div>"

            for path in [Path(f"characters/{character}.{extension}") for extension in ['png', 'jpg', 'jpeg']]:
                if path.exists():
                    image_html = f'<img src="file/{get_image_cache(path)}">'
                    break

            container_html += f'{image_html} <span class="character-name">{character}</span>'
            container_html += "</div>"
            cards.append([container_html, character])

    return cards


def filter_cards(filter_str=''):
    if filter_str == '':
        return cards

    filter_upper = filter_str.upper()
    return [k for k in cards if filter_upper in k[1].upper()]


def select_character(evt: gr.SelectData):
    return (evt.value[1])


def custom_js():
    path_to_js = Path(__file__).parent.resolve() / 'script.js'
    return open(path_to_js, 'r').read()


def ui():
    with gr.Accordion("Character gallery", open=settings["gallery-open"], elem_id='gallery-extension'):
        gr.HTML(value="<style>" + generate_css() + "</style>")
        with gr.Row():
            filter_box = gr.Textbox(label='', placeholder='Filter', lines=1, max_lines=1, container=False, elem_id='gallery-filter-box')
            gr.ClearButton(filter_box, value='🗑️', elem_classes='refresh-button')
            update = gr.Button("Refresh", elem_classes='refresh-button')

        gallery = gr.Dataset(
            components=[gr.HTML(visible=False)],
            label="",
            samples=generate_html(),
            elem_classes=["character-gallery"],
            samples_per_page=settings["gallery-items_per_page"]
        )

    filter_box.change(lambda: None, None, None, _js=f'() => {{{custom_js()}; gotoFirstPage()}}').success(
        filter_cards, filter_box, gallery).then(
        lambda x: gr.update(elem_classes='highlighted-border' if x != '' else ''), filter_box, filter_box, show_progress=False)

    update.click(generate_html, [], None).success(
        filter_cards, filter_box, gallery)

    gallery.select(select_character, None, gradio['character_menu'])