from __future__ import annotations

import os
import threading

import gradio as gr

from src.llm.gemma_client import should_startup_warmup, warmup_model_cache
from src.services.customization_service import customize_presentation


_WARMUP_STATE = {"status": "idle", "message": "Warmup not started."}


def _run_startup_warmup() -> None:
    try:
        backend = os.getenv("MODEL_BACKEND", "transformers")
        _WARMUP_STATE["status"] = "running"
        _WARMUP_STATE["message"] = f"Startup warmup running for backend: {backend}"
        result = warmup_model_cache(backend=backend)
        _WARMUP_STATE["status"] = "done"
        _WARMUP_STATE["message"] = f"Startup warmup complete. {result}"
    except Exception as exc:  # pragma: no cover - best-effort startup hook
        _WARMUP_STATE["status"] = "error"
        _WARMUP_STATE["message"] = f"Startup warmup failed: {exc}"


def _start_warmup_if_needed() -> None:
    if not should_startup_warmup():
        _WARMUP_STATE["status"] = "disabled"
        _WARMUP_STATE["message"] = "Startup warmup disabled by environment policy."
        return

    thread = threading.Thread(target=_run_startup_warmup, daemon=True, name="startup-warmup")
    thread.start()


_start_warmup_if_needed()


EXAMPLE_PROMPTS = [
    "5-slide investor update: company vision, product roadmap, Q3 milestones, team traction, and next-quarter asks. Professional tone.",
    "3-slide executive summary on AI workflow automation for operations leaders. Concise bullets, business-friendly language.",
    "6-slide product launch deck: problem statement, solution overview, key features, competitive landscape, go-to-market strategy, and call to action.",
    "4-slide team onboarding overview: company culture, tools and processes, 30-60-90 day plan, and key contacts.",
]

CSS = """
/* ── page background ── */
.gradio-container {
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%) !important;
    min-height: 100vh;
    font-family: 'Inter', system-ui, sans-serif;
}

/* ── hero header ── */
.slidegent-hero {
    text-align: center;
    padding: 2.5rem 1rem 1.5rem;
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    margin-bottom: 1.5rem;
}
.slidegent-hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(90deg, #818cf8, #c084fc, #fb7185);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.4rem;
    letter-spacing: -1px;
}
.slidegent-hero p {
    color: #94a3b8;
    font-size: 1.05rem;
    margin: 0;
}
.slidegent-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(99,102,241,0.15);
    border: 1px solid rgba(99,102,241,0.35);
    border-radius: 9999px;
    padding: 0.25rem 0.85rem;
    font-size: 0.78rem;
    color: #a5b4fc;
    margin-top: 0.75rem;
    text-decoration: none;
}

/* ── panels ── */
.panel-card {
    background: rgba(255,255,255,0.04) !important;
    border: 1px solid rgba(255,255,255,0.08) !important;
    border-radius: 16px !important;
    padding: 1.5rem !important;
    backdrop-filter: blur(8px);
}

/* ── labels ── */
label span, .gr-form label {
    color: #cbd5e1 !important;
    font-weight: 500 !important;
    font-size: 0.88rem !important;
    letter-spacing: 0.02em !important;
}

/* ── file upload & textbox borders ── */
.gr-file, .gr-textbox textarea, input[type=text], textarea {
    background: rgba(15,15,30,0.6) !important;
    border: 1px solid rgba(99,102,241,0.3) !important;
    border-radius: 10px !important;
    color: #e2e8f0 !important;
}
.gr-file:hover, textarea:focus {
    border-color: rgba(99,102,241,0.7) !important;
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15) !important;
}

/* ── generate button ── */
#generate-btn {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%) !important;
    border: none !important;
    border-radius: 12px !important;
    color: white !important;
    font-size: 1rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.03em !important;
    padding: 0.85rem 2rem !important;
    transition: all 0.2s ease !important;
    box-shadow: 0 4px 20px rgba(99,102,241,0.4) !important;
    width: 100% !important;
}
#generate-btn:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 6px 28px rgba(99,102,241,0.55) !important;
}
#generate-btn:active {
    transform: translateY(0) !important;
}

/* ── example buttons ── */
.gr-examples button {
    background: rgba(99,102,241,0.1) !important;
    border: 1px solid rgba(99,102,241,0.25) !important;
    border-radius: 8px !important;
    color: #a5b4fc !important;
    font-size: 0.8rem !important;
    transition: all 0.15s !important;
}
.gr-examples button:hover {
    background: rgba(99,102,241,0.22) !important;
    border-color: rgba(99,102,241,0.5) !important;
}

/* ── output download area ── */
.output-area {
    border: 1px dashed rgba(99,102,241,0.35) !important;
    border-radius: 14px !important;
    background: rgba(99,102,241,0.05) !important;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ── how-it-works row ── */
.how-step {
    text-align: center;
    padding: 1rem;
}
.how-step .icon { font-size: 2rem; margin-bottom: 0.4rem; }
.how-step .title { color: #e2e8f0; font-weight: 600; font-size: 0.9rem; }
.how-step .desc { color: #64748b; font-size: 0.78rem; margin-top: 0.2rem; }

/* ── footer ── */
.slidegent-footer {
    text-align: center;
    padding: 1.5rem 0 0.5rem;
    color: #475569;
    font-size: 0.8rem;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 2rem;
}
.slidegent-footer a { color: #818cf8; text-decoration: none; }
.slidegent-footer a:hover { text-decoration: underline; }
"""


def run_pipeline(template_file, prompt_text):
    return customize_presentation(template_file, prompt_text)


with gr.Blocks(
    title="Slidegent — AI Presentation Generator",
    css=CSS,
    theme=gr.themes.Base(
        primary_hue=gr.themes.colors.indigo,
        secondary_hue=gr.themes.colors.purple,
        neutral_hue=gr.themes.colors.slate,
        font=gr.themes.GoogleFont("Inter"),
    ).set(
        body_background_fill="#0f0f1a",
        block_background_fill="rgba(255,255,255,0.03)",
        block_border_color="rgba(255,255,255,0.08)",
        block_label_text_color="#94a3b8",
        input_background_fill="rgba(15,15,30,0.6)",
        input_border_color="rgba(99,102,241,0.3)",
        button_primary_background_fill="linear-gradient(135deg, #6366f1, #8b5cf6)",
        button_primary_text_color="white",
    ),
) as demo:

    # ── Hero ──────────────────────────────────────────────────────────────────
    gr.HTML("""
    <div class="slidegent-hero">
        <h1>✦ Slidegent</h1>
        <p>Upload your branded template · describe what you need · download a polished deck</p>
        <a class="slidegent-badge" href="https://huggingface.co/build-small-hackathon" target="_blank">
            🏕️ Build Small Hackathon 2026
        </a>
    </div>
    """)

    # ── How it works ──────────────────────────────────────────────────────────
    gr.HTML("""
    <div style="display:grid;grid-template-columns:repeat(3,1fr);gap:0.5rem;margin-bottom:1.5rem;">
        <div class="how-step">
            <div class="icon">📁</div>
            <div class="title">1 · Upload template</div>
            <div class="desc">Any .pptx — your brand colors, fonts and layout</div>
        </div>
        <div class="how-step">
            <div class="icon">✍️</div>
            <div class="title">2 · Describe your deck</div>
            <div class="desc">Topic, tone, number of slides — plain English</div>
        </div>
        <div class="how-step">
            <div class="icon">⚡</div>
            <div class="title">3 · Download</div>
            <div class="desc">Gemma 4 12B generates slides styled to your template</div>
        </div>
    </div>
    """)

    # ── Main inputs ───────────────────────────────────────────────────────────
    with gr.Row(equal_height=True):
        with gr.Column(scale=1, elem_classes="panel-card"):
            gr.Markdown("### 📎 Your Template")
            template_input = gr.File(
                label="Upload .pptx template",
                file_types=[".pptx"],
                height=140,
            )
            gr.Markdown(
                "<span style='color:#64748b;font-size:0.78rem;'>The app reads your template's fonts, colors and layout — and mirrors them in the output.</span>"
            )

        with gr.Column(scale=2, elem_classes="panel-card"):
            gr.Markdown("### 💬 What do you need?")
            prompt_input = gr.Textbox(
                label="Describe your presentation",
                lines=5,
                placeholder="e.g. 5-slide investor update: company vision, product roadmap, Q3 milestones, team traction, and next-quarter asks. Professional tone.",
            )
            gr.Examples(
                examples=[[p] for p in EXAMPLE_PROMPTS],
                inputs=[prompt_input],
                label="✨ Quick examples — click to fill",
                examples_per_page=4,
            )

    # ── Action & output ───────────────────────────────────────────────────────
    with gr.Row():
        with gr.Column():
            generate_btn = gr.Button(
                "⚡ Generate Presentation",
                variant="primary",
                elem_id="generate-btn",
            )

    with gr.Row():
        with gr.Column(elem_classes="output-area"):
            output_file = gr.File(
                label="⬇️  Your generated presentation",
                interactive=False,
            )

    generate_btn.click(
        fn=run_pipeline,
        inputs=[template_input, prompt_input],
        outputs=[output_file],
    )

    # ── Footer ────────────────────────────────────────────────────────────────
    gr.HTML("""
    <div class="slidegent-footer">
        Powered by <strong style="color:#a5b4fc">google/gemma-4-12b-it</strong> on ZeroGPU &nbsp;·&nbsp;
        <a href="https://www.loom.com/share/d7e25c7a114b4deda6b8de63abcba6a7" target="_blank">▶ Demo video</a> &nbsp;·&nbsp;
        <a href="https://www.linkedin.com/posts/jmsegui_buildsmallhackathon-huggingface-opensource-share-7472435145162080257-qxf5/" target="_blank">LinkedIn post</a> &nbsp;·&nbsp;
        <a href="https://huggingface.co/build-small-hackathon" target="_blank">Build Small Hackathon</a>
    </div>
    """)


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