import gradio as gr
from typing import TypedDict, List, Optional
import os
import pandas as pd

from climateqa.engine.talk_to_data.main import ask_drias
from climateqa.engine.talk_to_data.config import DRIAS_MODELS, DRIAS_UI_TEXT

class DriasUIElements(TypedDict):
    tab: gr.Tab
    details_accordion: gr.Accordion
    examples_hidden: gr.Textbox
    examples: gr.Examples
    drias_direct_question: gr.Textbox
    result_text: gr.Textbox
    table_names_display: gr.DataFrame
    query_accordion: gr.Accordion
    drias_sql_query: gr.Textbox
    chart_accordion: gr.Accordion
    model_selection: gr.Dropdown
    drias_display: gr.Plot
    table_accordion: gr.Accordion
    drias_table: gr.DataFrame
    pagination_display: gr.Markdown
    prev_button: gr.Button
    next_button: gr.Button


async def ask_drias_query(query: str, index_state: int, user_id: str):
    result = await ask_drias(query, index_state, user_id)
    return result


def show_results(sql_queries_state, dataframes_state, plots_state):
    if not sql_queries_state or not dataframes_state or not plots_state:
        # If all results are empty, show "No result"
        return (
            gr.update(visible=True),
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=False),
        )
    else:
        # Show the appropriate components with their data
        return (
            gr.update(visible=False),
            gr.update(visible=True),
            gr.update(visible=True),
            gr.update(visible=True),
            gr.update(visible=True),
            gr.update(visible=True),
            gr.update(visible=True),
            gr.update(visible=True),
        )


def filter_by_model(dataframes, figures, index_state, model_selection):
    df = dataframes[index_state]
    if df.empty:
        return df, None
    if "model" not in df.columns:
        return df, figures[index_state](df)
    if model_selection != "ALL":
        df = df[df["model"] == model_selection]
        if df.empty:
            return df, None
    figure = figures[index_state](df)
    return df, figure


def update_pagination(index, sql_queries):
    pagination = f"{index + 1}/{len(sql_queries)}" if sql_queries else ""
    return pagination


def show_previous(index, sql_queries, dataframes, plots):
    if index > 0:
        index -= 1
    return (
        sql_queries[index],
        dataframes[index],
        plots[index](dataframes[index]),
        index,
    )


def show_next(index, sql_queries, dataframes, plots):
    if index < len(sql_queries) - 1:
        index += 1
    return (
        sql_queries[index],
        dataframes[index],
        plots[index](dataframes[index]),
        index,
    )


def display_table_names(table_names):
    return [table_names]


def on_table_click(evt: gr.SelectData, table_names, sql_queries, dataframes, plots):
    index = evt.index[1]
    figure = plots[index](dataframes[index])
    return (
        sql_queries[index],
        dataframes[index],
        figure,
        index,
    )


def create_drias_ui() -> DriasUIElements:
    """Create and return all UI elements for the DRIAS tab."""
    with gr.Tab("France - Talk to DRIAS", elem_id="tab-vanna", id=6) as tab:
        with gr.Accordion(label="Details") as details_accordion:
            gr.Markdown(DRIAS_UI_TEXT)
            
        # Add examples for common questions
        examples_hidden = gr.Textbox(visible=False, elem_id="drias-examples-hidden")
        examples = gr.Examples(
            examples=[
                ["What will the temperature be like in Paris?"],
                ["What will be the total rainfall in France in 2030?"],
                ["How frequent will extreme events be in Lyon?"],
                ["Comment va évoluer la température en France entre 2030 et 2050 ?"]
            ],
            label="Example Questions",
            inputs=[examples_hidden],
            outputs=[examples_hidden],
        )
        
        with gr.Row():
            drias_direct_question = gr.Textbox(
                label="Direct Question",
                placeholder="You can write direct question here",
                elem_id="direct-question",
                interactive=True,
            )

        result_text = gr.Textbox(
            label="", elem_id="no-result-label", interactive=False, visible=True
        )

        table_names_display = gr.DataFrame(
            [], label="List of relevant indicators", headers=None, interactive=False, elem_id="table-names", visible=False
        )

        with gr.Accordion(label="SQL Query Used", visible=False) as query_accordion:
            drias_sql_query = gr.Textbox(
                label="", elem_id="sql-query", interactive=False
            )

        with gr.Accordion(label="Chart", visible=False) as chart_accordion:
            model_selection = gr.Dropdown(
                label="Model", choices=DRIAS_MODELS, value="ALL", interactive=True
            )
            drias_display = gr.Plot(elem_id="vanna-plot")

        with gr.Accordion(
            label="Data used", open=False, visible=False
        ) as table_accordion:
            drias_table = gr.DataFrame([], elem_id="vanna-table")

        pagination_display = gr.Markdown(
            value="", visible=False, elem_id="pagination-display"
        )

        with gr.Row():
            prev_button = gr.Button("Previous", visible=False)
            next_button = gr.Button("Next", visible=False)

        return DriasUIElements(
            tab=tab,
            details_accordion=details_accordion,
            examples_hidden=examples_hidden,
            examples=examples,
            drias_direct_question=drias_direct_question,
            result_text=result_text,
            table_names_display=table_names_display,
            query_accordion=query_accordion,
            drias_sql_query=drias_sql_query,
            chart_accordion=chart_accordion,
            model_selection=model_selection,
            drias_display=drias_display,
            table_accordion=table_accordion,
            drias_table=drias_table,
            pagination_display=pagination_display,
            prev_button=prev_button,
            next_button=next_button
        )



def setup_drias_events(ui_elements: DriasUIElements, share_client=None, user_id=None) -> None:
    """Set up all event handlers for the DRIAS tab."""
    # Create state variables
    sql_queries_state = gr.State([])
    dataframes_state = gr.State([])
    plots_state = gr.State([])
    index_state = gr.State(0)
    table_names_list = gr.State([])
    user_id = gr.State(user_id)

    # Handle example selection
    ui_elements["examples_hidden"].change(
        lambda x: (gr.Accordion(open=False), gr.Textbox(value=x)),
        inputs=[ui_elements["examples_hidden"]],
        outputs=[ui_elements["details_accordion"], ui_elements["drias_direct_question"]]
    ).then(
        ask_drias_query,
        inputs=[ui_elements["examples_hidden"], index_state, user_id],
        outputs=[
            ui_elements["drias_sql_query"],
            ui_elements["drias_table"],
            ui_elements["drias_display"],
            sql_queries_state,
            dataframes_state,
            plots_state,
            index_state,
            table_names_list,
            ui_elements["result_text"],
        ],
    ).then(
        show_results,
        inputs=[sql_queries_state, dataframes_state, plots_state],
        outputs=[
            ui_elements["result_text"],
            ui_elements["query_accordion"],
            ui_elements["table_accordion"],
            ui_elements["chart_accordion"],
            ui_elements["prev_button"],
            ui_elements["next_button"],
            ui_elements["pagination_display"],
            ui_elements["table_names_display"],
        ],
    ).then(
        update_pagination,
        inputs=[index_state, sql_queries_state],
        outputs=[ui_elements["pagination_display"]],
    ).then(
        display_table_names,
        inputs=[table_names_list],
        outputs=[ui_elements["table_names_display"]],
    )

    # Handle direct question submission
    ui_elements["drias_direct_question"].submit(
        lambda: gr.Accordion(open=False),
        inputs=None,
        outputs=[ui_elements["details_accordion"]]
    ).then(
        ask_drias_query,
        inputs=[ui_elements["drias_direct_question"], index_state, user_id],
        outputs=[
            ui_elements["drias_sql_query"],
            ui_elements["drias_table"],
            ui_elements["drias_display"],
            sql_queries_state,
            dataframes_state,
            plots_state,
            index_state,
            table_names_list,
            ui_elements["result_text"],
        ],
    ).then(
        show_results,
        inputs=[sql_queries_state, dataframes_state, plots_state],
        outputs=[
            ui_elements["result_text"],
            ui_elements["query_accordion"],
            ui_elements["table_accordion"],
            ui_elements["chart_accordion"],
            ui_elements["prev_button"],
            ui_elements["next_button"],
            ui_elements["pagination_display"],
            ui_elements["table_names_display"],
        ],
    ).then(
        update_pagination,
        inputs=[index_state, sql_queries_state],
        outputs=[ui_elements["pagination_display"]],
    ).then(
        display_table_names,
        inputs=[table_names_list],
        outputs=[ui_elements["table_names_display"]],
    )

    # Handle model selection change
    ui_elements["model_selection"].change(
        filter_by_model,
        inputs=[dataframes_state, plots_state, index_state, ui_elements["model_selection"]],
        outputs=[ui_elements["drias_table"], ui_elements["drias_display"]],
    )

    # Handle pagination buttons
    ui_elements["prev_button"].click(
        show_previous,
        inputs=[index_state, sql_queries_state, dataframes_state, plots_state],
        outputs=[ui_elements["drias_sql_query"], ui_elements["drias_table"], ui_elements["drias_display"], index_state],
    ).then(
        update_pagination,
        inputs=[index_state, sql_queries_state],
        outputs=[ui_elements["pagination_display"]],
    )

    ui_elements["next_button"].click(
        show_next,
        inputs=[index_state, sql_queries_state, dataframes_state, plots_state],
        outputs=[ui_elements["drias_sql_query"], ui_elements["drias_table"], ui_elements["drias_display"], index_state],
    ).then(
        update_pagination,
        inputs=[index_state, sql_queries_state],
        outputs=[ui_elements["pagination_display"]],
    )

    # Handle table selection
    ui_elements["table_names_display"].select(
        fn=on_table_click,
        inputs=[table_names_list, sql_queries_state, dataframes_state, plots_state],
        outputs=[ui_elements["drias_sql_query"], ui_elements["drias_table"], ui_elements["drias_display"], index_state],
    ).then(
        update_pagination,
        inputs=[index_state, sql_queries_state],
        outputs=[ui_elements["pagination_display"]],
    )

def create_drias_tab(share_client=None, user_id=None):
    """Create the DRIAS tab with all its components and event handlers."""
    ui_elements = create_drias_ui()
    setup_drias_events(ui_elements, share_client=share_client, user_id=user_id)