app.py

import gradio as gr
import pandas as pd
from huggingface_hub import HfApi, hf_hub_download, upload_file
import os
from datetime import datetime
from dotenv import load_dotenv
import re
from gradio_htmlplus import HTMLPlus

load_dotenv()

# CONFIGURATION
DATASET_REPO_ID = "elismasilva/hackathon-builders-choice"
PROJECTS_FILE = "projects.csv"
VOTES_FILE = "votes.csv"
HF_TOKEN = os.getenv("HF_TOKEN")
api = HfApi(token=HF_TOKEN)

# Hackathon Structure
TRACKS = ["Track 1: Building MCP", "Track 2: MCP in Action"]
CATEGORIES = ["Enterprise", "Consumer", "Creative"]
LEADERBOARD_VIEWS = [
    "Track 1 (Overall)",
    "Track 2 (Enterprise)",
    "Track 2 (Consumer)",
    "Track 2 (Creative)",
]


# DATA HANDLING FUNCTIONS
def load_data(filename, repo_id):
    try:
        filepath = hf_hub_download(
            repo_id=repo_id, filename=filename, repo_type="dataset", token=HF_TOKEN
        )
        return pd.read_csv(filepath, dtype={"track": str, "category": str})
    except Exception:
        if filename == PROJECTS_FILE:
            return pd.DataFrame(
                columns=[
                    "space_url",
                    "video_url",
                    "track",
                    "category",
                    "submitted_by",
                    "timestamp",
                ]
            )
        elif filename == VOTES_FILE:
            return pd.DataFrame(
                columns=["space_url", "voted_by", "track", "category", "timestamp"]
            )
        return pd.DataFrame()


def save_data(df, filename, repo_id, commit_message):
    temp_path = f"./{filename}"
    df.to_csv(temp_path, index=False)
    upload_file(
        path_or_fileobj=temp_path,
        path_in_repo=filename,
        repo_id=repo_id,
        repo_type="dataset",
        token=HF_TOKEN,
        commit_message=commit_message,
    )
    os.remove(temp_path)


# --- CORE LOGIC ---


def get_username(request: gr.Request):
    return (
        request.request.session.get("oauth_info", {})
        .get("userinfo", {})
        .get("preferred_username")
    )


def parse_view_to_context(filter_view: str):
    if "Track 1" in filter_view:
        return TRACKS[0], "Overall"
    if "Track 2" in filter_view:
        if "Enterprise" in filter_view:
            return TRACKS[1], "Enterprise"
        if "Consumer" in filter_view:
            return TRACKS[1], "Consumer"
        if "Creative" in filter_view:
            return TRACKS[1], "Creative"
    return None, None


def render_leaderboard(request: gr.Request, filter_view: str):
    username = get_username(request)
    projects_df = load_data(PROJECTS_FILE, DATASET_REPO_ID)
    votes_df = load_data(VOTES_FILE, DATASET_REPO_ID)
    vote_context_str = f"ℹ️ Your vote will be cast in the **'{filter_view}'** context."

    if projects_df.empty:
        return (
            "<h3>No projects submitted yet.</h3>",
            gr.update(choices=[], value=None),
            vote_context_str,
            gr.update(visible=False),
        )

    track_filter, category_filter = parse_view_to_context(filter_view)
    display_df = pd.DataFrame()

    if track_filter == TRACKS[0]:
        track1_projects = projects_df[
            projects_df["track"].str.contains(TRACKS[0], na=False)
        ].copy()
        if not track1_projects.empty:
            track1_projects["display_category"] = track1_projects[
                "category"
            ].str.replace(";", " | ")
            track1_votes = votes_df[
                (votes_df["track"] == TRACKS[0]) & (votes_df["category"] == "Overall")
            ]
            vote_counts = (
                track1_votes.groupby("space_url").size().reset_index(name="votes")
            )
            display_df = pd.merge(
                track1_projects, vote_counts, on="space_url", how="left"
            ).fillna(0)
    elif track_filter == TRACKS[1]:
        projects_df["track"] = projects_df["track"].str.split(";")
        exploded_tracks = projects_df.explode("track")
        exploded_tracks["category"] = exploded_tracks["category"].str.split(";")
        exploded_projects = exploded_tracks.explode("category")
        track2_filtered = exploded_projects[
            (exploded_projects["track"] == track_filter)
            & (exploded_projects["category"] == category_filter)
        ]
        if not track2_filtered.empty:
            context_votes = votes_df[
                (votes_df["track"] == track_filter)
                & (votes_df["category"] == category_filter)
            ]
            vote_counts = (
                context_votes.groupby("space_url").size().reset_index(name="votes")
            )
            display_df = pd.merge(
                track2_filtered, vote_counts, on="space_url", how="left"
            ).fillna(0)
            display_df["display_category"] = display_df["category"]

    if display_df.empty:
        return (
            f"<h3>No projects submitted for '{filter_view}' yet.</h3>",
            gr.update(choices=[], value=None),
            vote_context_str,
            gr.update(visible=False),
        )

    display_df["votes"] = display_df["votes"].astype(int)
    display_df["rank"] = (
        display_df["votes"].rank(method="dense", ascending=False).astype(int)
    )
    display_df = display_df.sort_values(
        by=["rank", "space_url"], ascending=True
    ).reset_index(drop=True)

    html = "<div>"
    trophies = {1: "🥇", 2: "🥈", 3: "🥉"}
    for _, row in display_df.iterrows():
        rank_num = row["rank"]
        rank_display = trophies.get(rank_num, f"<b>#{rank_num}</b>")
        space_name = re.sub(r"https://huggingface.co/spaces/", "", row["space_url"])
        category_text = row["display_category"]
        submitter_name = row["submitted_by"]

        video_link_html = ""
        if pd.notna(row["video_url"]) and str(row["video_url"]).strip() and str(row["video_url"]).strip() != '0':
            video_link_html = (
                f' | <a href="{row["video_url"]}" target="_blank">🎬 Video</a>'
            )

        action_button_html = ""
        if username and row["submitted_by"] == username:
            action_button_html = f'<a href="#" class="edit-button" data-url="{row["space_url"]}" style="text-decoration: none; font-size: 20px; margin-left: 15px;" title="Edit this project">✏️</a>'

        html += f"""
        <div style="display: flex; align-items: center; padding: 12px; border-bottom: 1px solid #eee; gap: 15px;" data-space-url="{row['space_url']}">
            <div style="font-size: 24px; width: 50px;">{rank_display}</div>
            <div style="flex-grow: 1;">
                <div style="font-weight: bold; font-size: 16px;">{space_name} <span style="font-weight: normal; color: #888; font-size: 14px;">({submitter_name})</span></div>
                <div style="font-size: 12px; color: #555;">
                    <a href="{row["space_url"]}" target="_blank">🚀 Space</a>
                    {video_link_html}
                     | <span style="color: #777;">Track: {row["track"].split(';')[0].split(':')[0]} | Categories: {category_text}</span>
                </div>
            </div>
            <div style="font-size: 20px; font-weight: bold; color: #3B82F6;">{row["votes"]} votes</div>
            {action_button_html}
        </div>
        """
    html += "</div>"

    project_urls = display_df["space_url"].unique().tolist()
    return (
        html,
        gr.update(choices=project_urls, value=None),
        vote_context_str,
        gr.update(visible=False),
    )


def submit_project(
    request: gr.Request, space_url, video_url, selected_tracks, selected_categories
):
    username = get_username(request)
    if not username:
        gr.Info("Error: You must be logged in to submit a project.")
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()

    if not all([space_url, selected_tracks, selected_categories]):
        gr.Info(
            "Error: Space URL, at least one Track, and at least one Category are required."
        )
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()

    if not "huggingface.co/spaces/" in space_url:
        gr.Info("Error: Please enter a valid Hugging Face Space URL.")
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()

    projects_df = load_data(PROJECTS_FILE, DATASET_REPO_ID)
    if space_url in projects_df["space_url"].values:
        gr.Info("Error: This project has already been submitted.")
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()

    tracks_str = ";".join(selected_tracks)
    categories_str = ";".join(selected_categories)
    new_project = pd.DataFrame(
        [
            {
                "space_url": space_url,
                "video_url": video_url,
                "track": tracks_str,
                "category": categories_str,
                "submitted_by": username,
                "timestamp": datetime.now().isoformat(),
            }
        ]
    )
    updated_projects = pd.concat([projects_df, new_project], ignore_index=True)
    save_data(
        updated_projects,
        PROJECTS_FILE,
        DATASET_REPO_ID,
        f"Project submitted by {username}",
    )
    gr.Info(f"✅ Success! Project '{space_url.split('/')[-1]}' submitted.")
    html, dropdown, context, edit_box_visibility = render_leaderboard(
        request, LEADERBOARD_VIEWS[0]
    )
    return f"Last action: Success.", html, dropdown, context


def cast_vote(request: gr.Request, project_to_vote, filter_view):
    username = get_username(request)
    if not username:
        gr.Info("Error: You must be logged in to vote.")
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()  # Return 4 values
    if not project_to_vote:
        gr.Info("Error: Please select a project to vote for.")
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()  # Return 4 values

    votes_df = load_data(VOTES_FILE, DATASET_REPO_ID)
    vote_track, vote_category = parse_view_to_context(filter_view)
    existing_vote = votes_df[
        (votes_df["space_url"] == project_to_vote)
        & (votes_df["voted_by"] == username)
        & (votes_df["track"] == vote_track)
        & (votes_df["category"] == vote_category)
    ]
    if not existing_vote.empty:
        gr.Info(
            f"Notice: You have already voted for this project in the '{filter_view}' context."
        )
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()  # Return 4 values

    new_vote = pd.DataFrame(
        [
            {
                "space_url": project_to_vote,
                "voted_by": username,
                "track": vote_track,
                "category": vote_category,
                "timestamp": datetime.now().isoformat(),
            }
        ]
    )
    updated_votes = pd.concat([votes_df, new_vote], ignore_index=True)
    save_data(updated_votes, VOTES_FILE, DATASET_REPO_ID, f"Vote cast by {username}")
    gr.Info(
        f"✅ Vote successfully cast for '{project_to_vote.split('/')[-1]}' in '{filter_view}'!"
    )

    html, dropdown, context, _ = render_leaderboard(request, filter_view)

    return f"Last action: Success.", html, dropdown, context


def edit_project(
    request: gr.Request,
    old_space_url: str,
    new_space_url: str,
    new_video_url: str,
    filter_view: str,
):
    username = get_username(request)
    if not username:
        gr.Info("Error: Authentication failed. Please log in again.")
        return gr.skip(), gr.skip(), gr.skip(), gr.update(visible=False)
    projects_df = load_data(PROJECTS_FILE, DATASET_REPO_ID)
    votes_df = load_data(VOTES_FILE, DATASET_REPO_ID)
    project_index = projects_df[
        (projects_df["space_url"] == old_space_url)
        & (projects_df["submitted_by"] == username)
    ].index
    if project_index.empty:
        gr.Info(
            "Error: You do not have permission to edit this project, or it no longer exists."
        )
        return gr.skip(), gr.skip(), gr.skip(), gr.update(visible=False)
    projects_df.loc[project_index, "space_url"] = new_space_url
    projects_df.loc[project_index, "video_url"] = new_video_url
    save_data(
        projects_df,
        PROJECTS_FILE,
        DATASET_REPO_ID,
        f"Project edited by {username}: {old_space_url} -> {new_space_url}",
    )
    if old_space_url != new_space_url:
        votes_df.loc[votes_df["space_url"] == old_space_url, "space_url"] = (
            new_space_url
        )
        save_data(
            votes_df,
            VOTES_FILE,
            DATASET_REPO_ID,
            f"Vote URLs updated for project edit by {username}",
        )
    gr.Info("✅ Project URLs updated successfully! Votes have been preserved.")
    html, dropdown, context, _ = render_leaderboard(request, filter_view)
    return "Project edited.", html, dropdown, context, gr.update(visible=False)


# --- THEME ---
theme = gr.themes.Default(
    primary_hue="blue", secondary_hue="yellow", neutral_hue="neutral"
).set(
    body_background_fill="*neutral_100",
    body_background_fill_dark="*neutral_800",
    body_text_color="*neutral_700",
    body_text_color_dark="*neutral_200",
    body_text_size="1.1em",
    code_background_fill="*neutral_100",
    code_background_fill_dark="*neutral_800",
    shadow_drop="2px 2px 4px *neutral_400",
    block_label_background_fill="*neutral_100",
    block_label_background_fill_dark="*neutral_800",
    block_label_text_color="*neutral_700",
    block_label_text_color_dark="*neutral_200",
    block_title_text_color="*primary_700",
    block_title_text_color_dark="*primary_300",
    panel_background_fill="*neutral_50",
    panel_background_fill_dark="*neutral_900",
    panel_border_color="*neutral_200",
    panel_border_color_dark="*neutral_700",
    checkbox_border_color="*neutral_300",
    checkbox_border_color_dark="*neutral_600",
    input_background_fill="white",
    input_background_fill_dark="*neutral_800",
    input_border_color="*neutral_300",
    input_border_color_dark="*neutral_600",
    slider_color="*primary_500",
    slider_color_dark="*primary_400",
    button_primary_background_fill="*primary_600",
    button_primary_background_fill_dark="*primary_500",
    button_primary_background_fill_hover="*primary_700",
    button_primary_background_fill_hover_dark="*primary_600",
    button_primary_text_color="white",
    button_primary_text_color_dark="white",
    button_secondary_background_fill="*secondary_400",
    button_secondary_background_fill_dark="*secondary_500",
    button_secondary_background_fill_hover="*secondary_500",
    button_secondary_background_fill_hover_dark="*secondary_600",
    button_secondary_text_color="*neutral_700",
    button_secondary_text_color_dark="*neutral_200",
    button_cancel_background_fill="*neutral_200",
    button_cancel_background_fill_dark="*neutral_700",
    button_cancel_background_fill_hover="*neutral_300",
    button_cancel_background_fill_hover_dark="*neutral_600",
    button_cancel_text_color="*neutral_700",
    button_cancel_text_color_dark="*neutral_200",
)

# --- GRADIO INTERFACE ---
with gr.Blocks(theme=theme, title="Hackathon Builders' Choice") as app:
    gr.Markdown("# 🏆 Hackathon Builders' Choice")
    gr.Markdown("An unofficial poll for participants to appreciate each other's work. Log in to submit your project and vote!") 
    gr.LoginButton()

    with gr.Tabs() as tabs:
        with gr.TabItem("🏆 Leaderboard & Vote", id=0):
            leaderboard_filter = gr.Radio(
                LEADERBOARD_VIEWS,
                label="Select Leaderboard View",
                value=LEADERBOARD_VIEWS[0],
            )
            with gr.Group(visible=False) as edit_group:
                gr.Markdown("### Edit Project URLs")
                edit_old_url = gr.Textbox(label="Original Space URL", interactive=False)
                edit_new_url = gr.Textbox(label="New Space URL")
                edit_new_video_url = gr.Textbox(label="New Video URL")
                with gr.Row():
                    save_edit_button = gr.Button("Save Changes", variant="primary")
                    cancel_edit_button = gr.Button("Cancel")

            with gr.Row():
                with gr.Column(scale=2):
                    leaderboard_html = HTMLPlus(
                        "Please log in to load...", selectable_elements=[".edit-button"]
                    )
                with gr.Column(scale=1):
                    gr.Markdown("### Cast Your Vote")
                    vote_context_display = gr.Markdown()
                    vote_status = gr.Markdown()
                    project_dropdown = gr.Dropdown(
                        label="Select a Project to Vote For", interactive=True
                    )
                    vote_button = gr.Button(
                        "👍 Vote for Selected Project", variant="primary"
                    )

        with gr.TabItem("🚀 Submit Your Project", id=1):
            gr.Markdown("### Register Your Project")
            submission_status = gr.Markdown()
            space_url_input = gr.Textbox(
                label="Your Hugging Face Space URL",
                placeholder="https://huggingface.co/spaces/...",
            )
            # NEW: Video URL now has "(Optional)" in the label
            video_url_input = gr.Textbox(
                label="Your Demo Video URL (Optional)",
                placeholder="https://www.youtube.com/watch?v=...",
            )
            track_checkboxes = gr.CheckboxGroup(TRACKS, label="Select Your Track(s)")
            category_checkboxes = gr.CheckboxGroup(
                CATEGORIES, label="Select Your Category(s)"
            )
            submit_button = gr.Button("Submit Project", variant="primary")

    # --- Event Handling ---
    def handle_page_load(request: gr.Request, filter_view: str):
        username = get_username(request)
        if username:
            gr.Info(f"Welcome, {username}!")
        return render_leaderboard(request, filter_view)

    def cancel_edit():
        return gr.update(visible=False), "", "", ""

    def handle_leaderboard_click(evt: gr.SelectData):
        if evt.index == ".edit-button":
            project_to_edit_url = evt.value.get("url")
            if project_to_edit_url:
                projects_df = load_data(PROJECTS_FILE, DATASET_REPO_ID)
                project_data = projects_df[
                    projects_df["space_url"] == project_to_edit_url
                ].iloc[0]
                return (
                    gr.update(visible=True),
                    project_data["space_url"],
                    project_data["space_url"],
                    project_data["video_url"],
                )
        return gr.skip(), gr.skip(), gr.skip(), gr.skip()

    app.load(
        fn=handle_page_load,
        inputs=[leaderboard_filter],
        outputs=[leaderboard_html, project_dropdown, vote_context_display, edit_group],
    )
    leaderboard_filter.change(
        fn=render_leaderboard,
        inputs=[leaderboard_filter],
        outputs=[leaderboard_html, project_dropdown, vote_context_display, edit_group],
    )
    submit_button.click(
        fn=submit_project,
        inputs=[
            space_url_input,
            video_url_input,
            track_checkboxes,
            category_checkboxes,
        ],
        outputs=[
            submission_status,
            leaderboard_html,
            project_dropdown,
            vote_context_display,
        ],
    )
    vote_button.click(
        fn=cast_vote,
        inputs=[project_dropdown, leaderboard_filter],
        outputs=[vote_status, leaderboard_html, project_dropdown, vote_context_display],
    )

    leaderboard_html.select(
        fn=handle_leaderboard_click,
        outputs=[edit_group, edit_old_url, edit_new_url, edit_new_video_url],
    )

    save_edit_button.click(
        fn=edit_project,
        inputs=[edit_old_url, edit_new_url, edit_new_video_url, leaderboard_filter],
        outputs=[
            submission_status,
            leaderboard_html,
            project_dropdown,
            vote_context_display,
            edit_group,
        ],
    )
    cancel_edit_button.click(
        fn=cancel_edit,
        outputs=[edit_group, edit_old_url, edit_new_url, edit_new_video_url],
    )

app.launch()