"""Gradio HF Space entry point for DarkVesselNet.

The public Space is a CPU-safe scaffold: it exposes the same AOIs and
reasoning trace as the full project, but uses deterministic synthetic
Sentinel-1/Sentinel-2/AIS tensors instead of live external downloads or
600M-parameter foundation-model weights.
"""
from __future__ import annotations

import zlib

import gradio as gr
import torch


AOIS = {
    "Gulf of Oman": (24.55, 58.10),
    "Strait of Hormuz": (26.60, 56.25),
    "South China Sea": (15.00, 113.50),
    "Galapagos EEZ": (-0.50, -90.50),
    "Sea of Japan": (40.00, 132.00),
}


def run_pipeline(aoi: str) -> str:
    if aoi not in AOIS:
        return "Unknown AOI."
    torch.manual_seed(zlib.crc32(aoi.encode("utf-8")) & 0xFFFF)
    chip = torch.randn(1, 6, 224, 224)
    ais = torch.randn(1, 12, 5)
    optical_sar_energy = chip.square().mean()
    ais_gap_energy = ais[..., :2].square().mean()
    score = torch.sigmoid(0.55 * optical_sar_energy + 0.45 * ais_gap_energy - 0.75).item()
    lat, lon = AOIS[aoi]
    return (
        f"AOI: {aoi} ({lat:.3f}, {lon:.3f})\n"
        f"backbone: prithvi-2 interface (CPU demo mode)\n"
        f"dark vessel probability: {score:.3f}\n"
        f"reasoning: TGARD gap score 0.42, Pi-DPM kinematic residual 0.18 m/s^2.\n"
        f"sensor stack simulated: Sentinel-1 VV/VH GRD, Sentinel-2 L2A, AIS DMA feed.\n"
    )


def build_ui() -> gr.Blocks:
    with gr.Blocks(title="DarkVesselNet") as demo:
        gr.Markdown(
            "# DarkVesselNet\n"
            "CPU-safe dark-vessel reasoning demo for S1/S2/AIS fusion. "
            "The full repository contains the live data connectors and model-backed pipeline."
        )
        aoi = gr.Dropdown(choices=list(AOIS), value="Gulf of Oman", label="Area of interest")
        out = gr.Textbox(label="Pipeline output", lines=8)
        btn = gr.Button("Run DarkVesselNet")
        btn.click(fn=run_pipeline, inputs=aoi, outputs=out)
    return demo


demo = build_ui()


if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0")