"""Custom Gradio theme and CSS for the Pigeon Pea Pangenome Atlas.

Provides a premium botanical/academic visual identity with forest-green
primary color, gold accents, and clean card-based layouts.

Exports
-------
get_theme()   – returns the configured ``gr.themes.Base`` instance.
build_theme() – alias kept for backward compatibility.
CUSTOM_CSS    – CSS string passed to ``demo.launch(css=...)`` (Gradio 6.x).
"""

import gradio as gr

# =====================================================================
# Gradio theme
# =====================================================================

def get_theme() -> gr.themes.Base:
    """Return a Gradio theme object with the Atlas visual identity.

    * Primary hue  : forest green (#2E7D32)
    * Secondary hue: gold (#D4A017)
    * Neutral hue  : warm gray
    * Border radius: 12px containers, 8px buttons
    * Font         : system sans-serif stack
    """
    theme = gr.themes.Base(
        primary_hue=gr.themes.colors.green,
        secondary_hue=gr.themes.colors.amber,
        neutral_hue=gr.themes.Color(
            name="warmgray",
            c50="#FAFAF5",
            c100="#F5F5F0",
            c200="#E8E8E0",
            c300="#D4D4CC",
            c400="#A8A8A0",
            c500="#787870",
            c600="#5C5C55",
            c700="#45453F",
            c800="#2E2E28",
            c900="#1A1A15",
            c950="#0D0D0A",
        ),
        font=[
            "-apple-system",
            "BlinkMacSystemFont",
            "Segoe UI",
            "Roboto",
            "Helvetica Neue",
            "Arial",
            "sans-serif",
        ],
        font_mono=[
            "SF Mono",
            "SFMono-Regular",
            "ui-monospace",
            "Menlo",
            "monospace",
        ],
    ).set(
        # Page
        body_background_fill="#FAFAF5",
        body_text_color="#1A1A1A",

        # Containers / blocks
        block_background_fill="#FFFFFF",
        block_border_width="0px",
        block_border_color="transparent",
        block_radius="12px",
        block_shadow="0 2px 8px rgba(0,0,0,0.06)",

        # Buttons
        button_primary_background_fill="linear-gradient(135deg, #2E7D32, #43A047)",
        button_primary_background_fill_hover="linear-gradient(135deg, #256b29, #388E3C)",
        button_primary_text_color="white",
        button_primary_border_color="transparent",
        button_secondary_background_fill="transparent",
        button_secondary_border_color="#2E7D32",
        button_secondary_text_color="#2E7D32",
        button_large_radius="8px",
        button_small_radius="8px",

        # Inputs
        input_radius="8px",
        input_border_color="#E0E0E0",
        input_background_fill="#FFFFFF",

        # Spacing
        layout_gap="16px",

        # Shadows
        shadow_spread="0px",
    )
    return theme


# Backward-compatible alias so existing ``from ui.theme import build_theme``
# continues to work without changes.
build_theme = get_theme


# =====================================================================
# Custom CSS
# =====================================================================

CUSTOM_CSS = """
/* =================================================================
   Pigeon Pea Pangenome Atlas — Custom CSS
   =================================================================
   Class reference (keep in sync with Python HTML builders):
     Page        : body overrides
     Cards       : .metric-card, .gene-card-panel
     Hero        : .hero-header, .hero-stat, .hero-subtitle
     Badges      : .gene-badge-core, .gene-badge-shell, .gene-badge-cloud
     Backpack    : .backpack-chip, .backpack-chip-core/shell/cloud
     Stepper     : .progress-stepper, .step-complete, .step-current, .step-future
     Buttons     : .btn-primary, .btn-secondary
     Legacy      : .quest-badge, .badge-core/shell/cloud, .gene-card,
                   .presence-barcode, .stat-card, .achievement-badge
   ================================================================= */

/* ---- Page-level overrides ---- */
body,
.gradio-container {
    background: #FAFAF5 !important;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
}

/* Remove default Gradio container borders */
.gradio-container .gr-box,
.gradio-container .gr-panel {
    border: none !important;
}

/* ---- Card styling ---- */
.gr-block,
.gr-panel,
.gr-group {
    background: #FFFFFF;
    border-radius: 16px !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* ---- Tabs — underline style ---- */
.tabs > .tab-nav {
    border-bottom: 2px solid #E0E0E0 !important;
    background: transparent !important;
}
.tabs > .tab-nav > button {
    border: none !important;
    border-radius: 0 !important;
    background: transparent !important;
    padding: 10px 20px !important;
    font-size: 14px;
    font-weight: 500;
    color: #757575;
    transition: color 0.2s, border-color 0.2s;
    position: relative;
}
.tabs > .tab-nav > button.selected {
    color: #2E7D32 !important;
    font-weight: 600;
    border-bottom: 3px solid #2E7D32 !important;
}
.tabs > .tab-nav > button:hover {
    color: #2E7D32;
}

/* ---- Hero header ---- */
.hero-header {
    background: #1a2332;
    color: #FFFFFF !important;
    padding: 40px 48px;
    border-radius: 16px;
    margin-bottom: 24px;
}
.hero-header h1 {
    margin: 0 0 8px 0;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #FFFFFF !important;
}
.hero-subtitle {
    font-size: 16px;
    color: #94a3b8 !important;
    margin-bottom: 28px;
    line-height: 1.5;
}
.hero-stat {
    display: inline-block;
    text-align: center;
    margin-right: 48px;
    vertical-align: top;
}
.hero-stat .stat-number {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: #FFFFFF !important;
    line-height: 1.1;
}
.hero-stat .stat-label {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: #94a3b8 !important;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 6px;
}

/* ---- Metric cards ---- */
.metric-card {
    background: #FFFFFF;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 24px;
    border-top: 3px solid #2E7D32;
    text-align: center;
    transition: box-shadow 0.2s;
}
.metric-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.10);
}
.metric-card.amber {
    border-top-color: #F9A825;
}
.metric-card.red {
    border-top-color: #C62828;
}
.metric-card.blue {
    border-top-color: #1565C0;
}
.metric-value {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    line-height: 1.1;
    margin-bottom: 4px;
}
.metric-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: #757575;
}

/* ---- Gene card side panel ---- */
.gene-card-panel {
    background: #FFFFFF;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 20px;
    border-left: 3px solid #2E7D32;
}

/* Gene classification badges */
.gene-badge-core {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: #2E7D32;
    color: #FFFFFF;
}
.gene-badge-shell {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: #F9A825;
    color: #333333;
}
.gene-badge-cloud {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: #C62828;
    color: #FFFFFF;
}

/* ---- Backpack chips ---- */
.backpack-chip {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    margin: 2px 4px;
    vertical-align: middle;
}
.backpack-chip-core {
    background: #E8F5E9;
    color: #2E7D32;
    border: 1px solid #C8E6C9;
}
.backpack-chip-shell {
    background: #FFF8E1;
    color: #F9A825;
    border: 1px solid #FFECB3;
}
.backpack-chip-cloud {
    background: #FFEBEE;
    color: #C62828;
    border: 1px solid #FFCDD2;
}

/* ---- Progress stepper ---- */
.progress-stepper {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 16px 0;
}
.progress-stepper .step {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #757575;
    padding: 0 16px;
    position: relative;
}
.progress-stepper .step::after {
    content: "";
    position: absolute;
    right: -2px;
    width: 24px;
    height: 2px;
    background: #E0E0E0;
}
.progress-stepper .step:last-child::after {
    display: none;
}
.progress-stepper .step .dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}
/* Completed step: filled green circle with checkmark */
.step-complete .dot {
    background: #2E7D32;
    color: #FFFFFF;
}
.step-complete {
    color: #2E7D32;
    font-weight: 500;
}
/* Current step: green ring, bold label */
.step-current .dot {
    background: transparent;
    border: 2.5px solid #2E7D32;
    color: #2E7D32;
}
.step-current {
    color: #2E7D32;
    font-weight: 700;
}
/* Future step: gray dimmed circle */
.step-future .dot {
    background: #E0E0E0;
    color: #9E9E9E;
}
.step-future {
    color: #9E9E9E;
}

/* ---- Buttons ---- */
.btn-primary {
    display: inline-block;
    padding: 10px 24px;
    background: linear-gradient(135deg, #2E7D32, #43A047);
    color: #FFFFFF !important;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, box-shadow 0.2s;
    text-decoration: none;
}
.btn-primary:hover {
    opacity: 0.92;
    box-shadow: 0 4px 12px rgba(46,125,50,0.25);
}
.btn-secondary {
    display: inline-block;
    padding: 10px 24px;
    background: transparent;
    color: #2E7D32 !important;
    border: 2px solid #2E7D32;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
}
.btn-secondary:hover {
    background: #E8F5E9;
}

/* ---- Hide Gradio footer / reduce noise ---- */
footer {
    display: none !important;
}
.gradio-container .gr-padded {
    padding: 12px !important;
}

/* Clean accordion styling */
.gr-accordion {
    border: 1px solid #E0E0E0 !important;
    border-radius: 12px !important;
    box-shadow: none !important;
}
.gr-accordion > .label-wrap {
    padding: 12px 16px !important;
}

/* ---- Legacy classes (backward compat) ---- */
.quest-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.85em;
    font-weight: 600;
    margin: 2px 4px;
}
.badge-core { background: #2E7D32; color: white; }
.badge-shell { background: #F9A825; color: #333; }
.badge-cloud { background: #C62828; color: white; }

.gene-card {
    border: 2px solid #2E7D32;
    border-radius: 12px;
    padding: 16px;
    background: #FFFFFF;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.presence-barcode span {
    display: inline-block;
    width: 3px;
    height: 20px;
    margin: 0;
}
.presence-barcode .present { background: #2E7D32; }
.presence-barcode .absent { background: #E0E0E0; }

.stat-card {
    text-align: center;
    padding: 20px;
    border-radius: 12px;
    background: #FFFFFF;
    border-top: 3px solid #2E7D32;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.stat-card .stat-value {
    font-size: 1.8em;
    font-weight: 700;
    color: #2E7D32;
}
.stat-card .stat-label {
    font-size: 0.85em;
    color: #757575;
}

.achievement-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    background: linear-gradient(135deg, #D4A017, #F9A825);
    color: #333;
    font-weight: 600;
    margin: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
"""