"""Submission tab – lets registered teams upload results."""

import gradio as gr
from utils import add_submission, load_registrations


def _submit(team_name: str, method: str, score_str: str, file):
    team_name = team_name.strip()
    method    = method.strip()

    if not team_name or not method or score_str == "":
        return gr.update(value="⚠️ All fields are required.", visible=True)

    # Check the team is registered
    df = load_registrations()
    if df.empty or not (df["team_name"] == team_name).any():
        return gr.update(
            value="⚠️ Team not found. Please register first.", visible=True
        )

    try:
        score     = float(score_str)
        file_name = file.name if file else ""
        add_submission(team_name, method, score, file_name)
        return gr.update(
            value=f"✅ Submission recorded for **{team_name}** (score: {score:.4f}).",
            visible=True,
        )
    except ValueError:
        return gr.update(value="⚠️ Score must be a number.", visible=True)
    except Exception as exc:
        return gr.update(value=f"❌ Submission failed: {exc}", visible=True)


def build_submission_tab() -> None:
    gr.Markdown("## Submit your results")
    gr.Markdown(
        "Your team must be registered before submitting. "
        "Enter the **exact** team name used during registration."
    )

    with gr.Row():
        with gr.Column():
            team_name = gr.Textbox(label="Team name",   placeholder="Team Awesome")
            method    = gr.Textbox(label="Method name", placeholder="BERT + SVM")
            score     = gr.Textbox(label="Score",       placeholder="0.9142")
            file      = gr.File(label="Result file (optional)")
            submit    = gr.Button("Submit", variant="primary")

    status = gr.Markdown(visible=False)

    submit.click(
        fn=_submit,
        inputs=[team_name, method, score, file],
        outputs=status,
    )