"""NeuroBait UI — hybrid: a standard AI-chat experience (``gr.ChatInterface``,
DeepSeek/Perplexity-ish) carrying NeuroBait's identity.

gradio-only (no torch/spaces) so the UI can be built and smoke-tested without the
model stack. Theme + CSS are applied at ``launch()`` because Gradio 6 moved
``theme``/``css``/``js`` off the Blocks/ChatInterface constructor — see the
deprecation warning we hit in the Space logs.

Dark-only, earthy, calm sage-teal accent (gentler / more sensory-safe for ADHD
than vivid green). The palette is set straight on ``:root`` and mapped onto
Gradio's core CSS vars unconditionally, so the app is dark with no dependence on
JS or HF's ``?__theme``.
"""

from __future__ import annotations

import gradio as gr

MOODS = ["Calm", "Tired", "Anxious", "Focused"]

THEME = gr.themes.Soft(primary_hue="teal", neutral_hue="slate")

TITLE = "🧠 NeuroBait"

DESCRIPTION = (
    "A warm space and a gentle boost for your everyday — NeuroBait works *with* "
    "your dopamine, not against your willpower. Your brain isn't broken; it's "
    "wired for a different kind of focus."
)

PLACEHOLDER = (
    "### 🧠 NeuroBait\n"
    "Tell me what's on your mind — no need to be tidy, just honest.\n\n"
    "*No red pen · no urgency · no streaks.*"
)

EXAMPLES = [
    ["There's something I've been meaning to get to, and it keeps slipping by.", "Calm"],
    ["My space feels a bit cluttered today.", "Tired"],
    ["My mind feels a little foggy right now.", "Anxious"],
]

CSS = """
/* Earthy, always-dark palette on :root (no .dark dependency), with a calm muted
   sage-teal accent instead of vivid green. */
:root {
  --forest: #6fb6a2;
  --sage: #5da894;
  --mint: #20362f;
  --cream: #1d2128;
  --linen: #15181d;
  --sand: #2e333b;
  --stone: #aeb6bf;
  --charcoal: #eef1f4;
  --radius: 10px;
  --brand-grad: linear-gradient(135deg, #5da894, #4f9582);
}
/* map Gradio core theme vars onto our dark palette so built-in components render
   dark even when Gradio's own .dark class is off */
body, .gradio-container, gradio-app, .dark {
  --body-background-fill: var(--linen);
  --background-fill-primary: var(--cream);
  --background-fill-secondary: var(--linen);
  --block-background-fill: var(--cream);
  --block-label-background-fill: var(--cream);
  --block-border-color: var(--sand);
  --border-color-primary: var(--sand);
  --body-text-color: var(--charcoal);
  --body-text-color-subdued: var(--stone);
  --input-background-fill: var(--cream);
  --input-border-color: var(--sand);
  --button-secondary-background-fill: var(--cream);
  --button-secondary-text-color: var(--charcoal);
}
body, .gradio-container {
  background: var(--linen) !important;
  color: var(--charcoal) !important;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji" !important;
}
/* keep the conversation in a comfortable centered column like a modern chat app */
.gradio-container { max-width: 960px !important; margin: 0 auto !important; }

h1 { letter-spacing: -0.5px; font-weight: 800; }

/* user bubble gets the brand accent, assistant stays flat/quiet */
.message.user, [data-testid="user"] {
  background: var(--brand-grad) !important; color: #fff !important; border: none !important;
}
.message.bot, [data-testid="bot"] {
  background: var(--cream) !important; border: 1px solid var(--sand) !important; color: var(--charcoal) !important;
}

/* rounded, calm input + primary button */
textarea, input[type="text"] {
  border-radius: var(--radius) !important; background: var(--cream) !important;
  border: 1px solid var(--sand) !important; color: var(--charcoal) !important;
}
button.primary, .submit-button, [variant="primary"] {
  background: var(--brand-grad) !important; border: none !important; color: #fff !important;
}
"""


def message_text(content) -> str:
    if isinstance(content, str):
        return content.strip()
    if isinstance(content, list):
        parts = []
        for item in content:
            if isinstance(item, dict):
                text = item.get("text")
                if isinstance(text, str):
                    parts.append(text)
        return " ".join(part.strip() for part in parts if part.strip()).strip()
    return ""


def build_demo(respond_fn):
    """Build the NeuroBait chat. ``respond_fn`` signature (streaming generator ok):

    respond_fn(message: str, history: list[dict], mood: str) -> str | generator[str]
    """
    mood = gr.Radio(MOODS, value="Calm", label="🌳 How are you feeling?")
    chatbot = gr.Chatbot(
        height=560,
        show_label=False,
        placeholder=PLACEHOLDER,
        avatar_images=(None, None),
    )
    return gr.ChatInterface(
        fn=respond_fn,
        chatbot=chatbot,
        additional_inputs=[mood],
        additional_inputs_accordion=gr.Accordion("🌳 How are you feeling?", open=True),
        title=TITLE,
        description=DESCRIPTION,
        examples=EXAMPLES,
        cache_examples=False,
        save_history=True,
        fill_height=True,
        autoscroll=True,
    )