import gradio as gr
from gradio_leaderboard import Leaderboard, ColumnFilter, SelectColumns
import pandas as pd
from apscheduler.schedulers.background import BackgroundScheduler
from huggingface_hub import snapshot_download
from src.about import CITATION_BUTTON_LABEL, CITATION_BUTTON_TEXT, EVALUATION_QUEUE_TEXT, INTRODUCTION_TEXT, LLM_BENCHMARKS_TEXT, TITLE
from src.tasks import TASK_DESCRIPTIONS, MEASURE_DESCRIPTION
from src.display.css_html_js import custom_css
from src.display.utils import BENCHMARK_COLS, COLS, EVAL_COLS, EVAL_TYPES, AutoEvalColumn, ModelType, fields, WeightType, Precision
from src.envs import API, EVAL_REQUESTS_PATH, EVAL_RESULTS_PATH, QUEUE_REPO, REPO_ID, RESULTS_REPO, TOKEN
from src.populate import get_evaluation_queue_df, get_leaderboard_df
from src.submission.submit import add_new_eval


# Define task metadata (icons, names, descriptions)
TASK_METADATA = {
    "TE": {"icon": "📊", "name": "Textual Entailment", "tooltip": ""},
    "SA": {"icon": "😃", "name": "Sentiment Analysis", "tooltip": ""},
    "HS": {"icon": "⚠️", "name": "Hate Speech", "tooltip": ""},
    "AT": {"icon": "🏥", "name": "Admission Test", "tooltip": ""},
    "WIC": {"icon": "🔤", "name": "Word in Context", "tooltip": ""},
    "FAQ": {"icon": "❓", "name": "Frequently Asked Questions", "tooltip": ""},
    "LS": {"icon": "🔄", "name": "Lexical Substitution", "tooltip": ""},
    "SU": {"icon": "📝", "name": "Summarization", "tooltip": ""},
    "NER": {"icon": "🏷️", "name": "Named Entity Recognition", "tooltip": ""},
    "REL": {"icon": "🔗", "name": "Relation Extraction", "tooltip": ""},
}

def restart_space():
    """Restart the Hugging Face space."""
    API.restart_space(repo_id=REPO_ID)

# Helper function for leaderboard initialization
def init_leaderboard(dataframe, default_selection=None, hidden_columns=None):
    """Initialize and return a leaderboard."""
    if dataframe is None or dataframe.empty:
        raise ValueError("Leaderboard DataFrame is empty or None.")

    return Leaderboard(
        value=dataframe,
        datatype=[c.type for c in fields(AutoEvalColumn)],
        select_columns=SelectColumns(
            default_selection=default_selection or [c.name for c in fields(AutoEvalColumn) if c.displayed_by_default],
            cant_deselect=[c.name for c in fields(AutoEvalColumn) if c.never_hidden],
            label="Select Columns to Display:",
        ),
        search_columns=[AutoEvalColumn.model.name, AutoEvalColumn.license.name],
        hide_columns=hidden_columns or [c.name for c in fields(AutoEvalColumn) if c.hidden],
        filter_columns=[
            ColumnFilter(AutoEvalColumn.fewshot_type.name, type="checkboxgroup", label="N-Few-Shot Learning (FS)"),
            ColumnFilter(AutoEvalColumn.params.name, type="slider", min=0, max=150, label="Select the number of parameters (B)"),
        ],
        bool_checkboxgroup_label="Hide models",
        interactive=False,
    )


def download_snapshot(repo, local_dir):
    """Try to download a snapshot from Hugging Face Hub."""
    try:
        print(f"Downloading from {repo} to {local_dir}...")
        snapshot_download(repo_id=repo, local_dir=local_dir, repo_type="dataset", tqdm_class=None, etag_timeout=30, token=TOKEN)
    except Exception as e:
        print(f"Error downloading {repo}: {e}")
        restart_space()


# Initialize the app by downloading snapshots
download_snapshot(QUEUE_REPO, EVAL_REQUESTS_PATH)
download_snapshot(RESULTS_REPO, EVAL_RESULTS_PATH)

# Load leaderboard data
LEADERBOARD_DF = get_leaderboard_df(EVAL_RESULTS_PATH, EVAL_REQUESTS_PATH, COLS, BENCHMARK_COLS)
finished_eval_queue_df, running_eval_queue_df, pending_eval_queue_df = get_evaluation_queue_df(EVAL_REQUESTS_PATH, EVAL_COLS)

# Prepare the main interface
demo = gr.Blocks(css=custom_css)
with demo:
    gr.HTML(TITLE)
    gr.Markdown(INTRODUCTION_TEXT, elem_classes="markdown-text")

    with gr.Tabs(elem_classes="tab-buttons") as tabs:
        # Main leaderboard tab
        with gr.TabItem("🏅 EVALITA-LLM Benchmark"):

            leaderboard = init_leaderboard(
                LEADERBOARD_DF,
                default_selection=['FS', 'Model', "Avg. Combined Performance ⬆️", "TE", "SA", "HS", "AT", "WIC", "FAQ", "LS", "SU", "NER", "REL"],
                hidden_columns=[col for col in LEADERBOARD_DF.columns if col not in ['FS', 'Model', "Avg. Combined Performance ⬆️", "TE", "SA", "HS", "AT", "WIC", "FAQ", "LS", "SU", "NER", "REL"]]
            )

        # About tab
        with gr.TabItem("📝 About"):
            gr.Markdown(LLM_BENCHMARKS_TEXT, elem_classes="markdown-text")

        # Task-specific leaderboards
        for task, metadata in TASK_METADATA.items():
            with gr.TabItem(f"{metadata['icon']}{task}"):

                task_description = TASK_DESCRIPTIONS.get(task, "Description not available.")
                gr.Markdown(task_description, elem_classes="markdown-text")

                leaderboard = init_leaderboard(
                    LEADERBOARD_DF.rename(columns={f"{task} Prompt Average": "Prompt Average", f"{task} Best Prompt": "Best Prompt", f"{task} Best Prompt Id": "Best Prompt Id", task: "Combined Performance"}),
                    default_selection=['FS', 'Model', 'Combined Performance', 'Prompt Average', 'Best Prompt', 'Best Prompt Id'],
                    hidden_columns=[col for col in LEADERBOARD_DF.columns if col not in ['FS', 'Model', 'Combined Performance', 'Prompt Average', 'Best Prompt', 'Best Prompt Id']]
                )

    # Citation section
    with gr.Accordion("📙 Citation", open=False):
        gr.Textbox(value=CITATION_BUTTON_TEXT, label=CITATION_BUTTON_LABEL, lines=20, elem_id="citation-button", show_copy_button=True)

# Background job to restart space
scheduler = BackgroundScheduler()
scheduler.add_job(restart_space, "interval", seconds=1800)
scheduler.start()

# Launch the app with concurrent queueing
demo.queue(default_concurrency_limit=40).launch()