from __future__ import annotations

import gradio as gr

from pipelines import ask, build_kb, summarize
from policy import DEFAULT_POLICY


def create_interface() -> gr.Blocks:
    with gr.Blocks(title="CreditCopilot — RAG for Loan Docs") as demo:
        gr.Markdown(
            "# 🧠 CreditCopilot\nRetrieval-augmented assistant that summarizes loan documents, checks policy rules, and suggests next actions."
        )

        with gr.Row():
            with gr.Column(scale=1):
                files = gr.Files(label="Upload loan PDFs", file_count="multiple", file_types=[".pdf"])
                policy = gr.Code(value=DEFAULT_POLICY, language="yaml", label="Policy rules (YAML)")
                build_btn = gr.Button("Build knowledge base", variant="primary")
                build_status = gr.Markdown()

                sum_btn = gr.Button("Quick summarize")
                sum_out = gr.Textbox(label="Portfolio-ready summary", lines=8)

            with gr.Column(scale=2):
                question = gr.Textbox(
                    label="Ask a question (e.g., What are the key risks and missing docs?)", lines=2
                )
                ask_btn = gr.Button("Ask")
                answer = gr.Markdown(label="Answer")
                policy_report = gr.Code(label="Policy check report (JSON)")
                actions = gr.Markdown(label="Suggested next actions")

        build_btn.click(build_kb, [files, policy], [build_status, policy])
        ask_btn.click(ask, [question, policy], [answer, policy_report, actions])
        sum_btn.click(summarize, None, sum_out)

    return demo