import json
from datetime import datetime, timezone
from pathlib import Path

import gradio as gr
from huggingface_hub import snapshot_download
from loguru import logger
from pydantic import BaseModel, Field

from envs import API, REPO_ID, USERS_PATH, USERS_REPO
from formatting import styled_error, styled_message, styled_warning

css = """
:root {
    color-scheme: light !important;
    --block-border-width: 0 !important;
    --section-header-text-weight: 600 !important;
    --section-header-text-size: 14px !important;
    --input-radius: var(--radius-xl) !important;
    --font-mono: "Space Mono", monospace !important;
    --text-sm: 12px !important;
    --text-md: 14px !important;
    --text-lg: 16px !important;
    --input-text-size: var(--text-sm) !important;
    --body-text-size: 14px !important;
    --input-background-fill-focus: var(--secondary-300) !important;

    // Button Colors
    --button-primary-background-fill: var(--primary-800) !important;
    --button-secondary-background-fill: var(--secondary-600) !important;
    --checkbox-label-text-color: var(--body-text-color) !important;


    --card-bg-color: #fcecd4;
    --card-btn-color: #D4E4FC;
    --card-btn-color-hover: #7DAEF6;
    --answer-bg-color: #f0f8ff;
    --hover-border-color: #121212;
}

:root .dark {
    color-scheme: dark !important;
    --block-border-width: 0 !important;
    --section-header-text-weight: 600 !important;
    --section-header-text-size: 14px !important;
    --input-radius: var(--radius-xl) !important;
    --font-mono: "Space Mono", monospace !important;
    --text-sm: 12px !important;
    --text-md: 14px !important;
    --text-lg: 16px !important;
    --input-text-size: var(--text-sm) !important;
    --body-text-size: 14px !important;

    --button-primary-background-fill: var(--neutral-100) !important;
    --button-secondary-background-fill: var(--secondary-300) !important;
    --button-primary-text-color: black !important;
    --button-secondary-text-color: black !important;
    --checkbox-label-text-color: var(--body-text-color) !important;

    --card-bg-color: #383127;
    --answer-bg-color: #1a2b3c;
    --hover-border-color: #ffffff;
}

.gradio-app {

}
.warning-header {
    color: red;
}

.neutral-header {
    color: blue;
}

.success-header {
    color: green;
}

.gradio-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 8px;
}
"""


def restart_space():
    API.restart_space(repo_id=REPO_ID)


def download_dataset_snapshot(repo_id, local_dir):
    try:
        logger.info(f"Downloading dataset snapshot from {repo_id} to {local_dir}")
        snapshot_download(
            repo_id=repo_id,
            local_dir=local_dir,
            repo_type="dataset",
            tqdm_class=None,
        )
    except Exception as e:
        logger.error(f"Error downloading dataset snapshot from {repo_id} to {local_dir}: {e}. Restarting space.")
        API.restart_space(repo_id=repo_id)


download_dataset_snapshot(USERS_REPO, USERS_PATH)


class User(BaseModel):
    """
    Represents a user in the competition system, formatted for HuggingFace datasets.
    """

    username: str = Field(description="HuggingFace username of the user")
    name: str = Field(description="Full name of the user")
    email: str = Field(description="Contact email of the user")
    affiliation: str = Field(description="Affiliation of the user")


def create_user(
    username: str,
    name: str,
    email: str,
    affiliation: str,
    profile: gr.OAuthProfile | None,
) -> User:
    """
    Create a user for a tossup model.

    Args:
        name: Display name of the submission
        description: Detailed description of what the submission does
        user_email: Email of the user who created the submission
        workflow: The workflow configuration for the tossup model

    Returns:
        Submission object if successful, None if validation fails
    """
    # Create the submission
    dt = datetime.now(timezone.utc)
    submission = User(
        username=username,
        name=name,
        email=email,
        affiliation=affiliation,
        created_at=dt.isoformat(),
    )

    return submission


def get_user(username: str) -> User | None:
    """
    Get a user from the registered users dataset.
    """
    out_path = Path(f"{USERS_PATH}/{username}.json")
    if not out_path.exists():
        return None
    with out_path.open("r") as f:
        user_dict = json.load(f)
    return User.model_validate(user_dict)


def is_user_logged_in(profile: gr.OAuthProfile | None) -> bool:
    """
    Check if a user is logged in.
    """
    return profile is not None


def user_signup(
    name: str,
    email: str,
    affiliation: str,
    profile: gr.OAuthProfile | None = None,
) -> User:
    """
    Sign up for the competition.
    """
    if profile is None:
        return styled_error("Please sign in using your HuggingFace account to register for the competition.")
    try:
        username = profile.username
        user = get_user(username)
        new_user = create_user(
            username=username,
            name=name,
            email=email,
            affiliation=affiliation,
            profile=profile,
        )
        # Convert to dictionary format
        user_dict = new_user.model_dump()

        # Upload to HuggingFace dataset
        updated = bool(user)
        API.upload_file(
            path_or_fileobj=json.dumps(user_dict, indent=2).encode(),
            path_in_repo=f"{username}.json",
            repo_id=USERS_REPO,
            repo_type="dataset",
            commit_message=f"{'Update' if updated else 'Add'} user {username}",
        )

        return styled_message(
            f"Successfully {'updated' if updated else 'registered'} user {username} for the competition!<br>"
        )

    except Exception as e:
        logger.exception(e)
        return styled_error(
            "Error registering for the competition. Please try again later, or contact the organizers at <br><a href='mailto:qanta-challenge@googlegroups.com'>qanta-challenge@googlegroups.com</a>."
        )


def load_user_info(profile: gr.OAuthProfile | None):
    if profile is None:
        return (
            gr.update(interactive=False),
            gr.update(interactive=False),
            gr.update(interactive=False),
            gr.update(interactive=False),
            gr.update(
                value="<h2 class='warning-header'>Please sign in using your HuggingFace account to register for the competition.</h2>",
            ),
        )
    user = get_user(profile.username)
    if user is None:
        return (
            gr.update(interactive=True),
            gr.update(interactive=True),
            gr.update(interactive=True),
            gr.update(interactive=True, value="Register"),
            gr.update(
                value="<h2 class='neutral-header'>Fill in your details below to register for the competition.</h2>",
            ),
        )
    return (
        gr.update(interactive=True, value=user.name),
        gr.update(interactive=True, value=user.email),
        gr.update(interactive=True, value=user.affiliation),
        gr.update(interactive=True, value="Update Information"),
        gr.update(
            value="<h2 class='success-header'>You are already registered! You can update your details below.</h2>",
        ),
    )


with gr.Blocks(title="Register - QANTA 2025 Quizbowl System Submission", css=css) as demo:
    gr.Markdown("# Register for QANTA 2025 Quizbowl System Submission")
    with gr.Row():
        with gr.Column():
            # HuggingFace Login Button
            hf_login_btn = gr.LoginButton(scale=1)
            header = gr.HTML("<h2>Fill in your details below</h2>")

            # Registration form
            name = gr.Textbox(label="Full Name", placeholder="Enter your full name")
            email = gr.Textbox(label="Contact Email", placeholder="Enter your email")
            affiliation = gr.Textbox(
                label="Affiliation",
                placeholder="Enter your organization or institution",
            )

            submit_btn = gr.Button("Register")
            status = gr.Markdown()

            submit_btn.click(
                fn=user_signup,
                inputs=[name, email, affiliation],
                outputs=[status],
            )

    demo.load(
        load_user_info,
        inputs=[],
        outputs=[name, email, affiliation, submit_btn, header],
    )

demo.queue(default_concurrency_limit=40).launch()