"""
SAE Feature Explorer — Bokeh server entry point.

Launch with:  bokeh serve scripts/explorer --port 5006 --args --data ...

Layout:
  Upper workspace  — active steering & composition
    left  : example presets sidebar
    center: patch explorer | active features tile strip | DynaDiff controls & output
  ── dashed divider ──────────────────────────────────────────────────────────
  Lower workspace  — feature search & analysis
    left  : CLIP search input + result cards
    center: feature activation MEI grid
    right : feature naming + cortical profile + SAE summary
"""

import os
import random
import sys

sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', '..', 'src'))

# ---------------------------------------------------------------------------
# Multi-session fix: Bokeh re-executes main.py for every new browser session
# but Python caches imported submodules.  Modules that create Bokeh model
# instances at import time (widgets, all panels) must be cleared so each
# session gets fresh instances.  Data/logic modules (state, datasets, brain,
# inference, rendering) are deliberately kept cached.
# ---------------------------------------------------------------------------
_pkg_dir = os.path.dirname(os.path.abspath(__file__))
_keep_stems = frozenset(
    ['state', 'datasets', 'args', 'brain', 'inference', 'rendering',
     'steering_logic', 'feature_logic', 'feature_list_logic',
     'clip_search_logic', '__init__'])


def _clear_widget_modules():
    for _k in list(sys.modules.keys()):
        _m = sys.modules.get(_k)
        if _m is None:
            continue
        _f = getattr(_m, '__file__', None) or ''
        if not _f.startswith(_pkg_dir) or _k == __name__:
            continue
        if os.path.basename(_f).split('.')[0] in _keep_stems:
            continue
        if '.' in _k:
            _par = sys.modules.get(_k.rsplit('.', 1)[0])
            if _par is not None:
                try:
                    delattr(_par, _k.rsplit('.', 1)[1])
                except AttributeError:
                    pass
        del sys.modules[_k]


_clear_widget_modules()
del _clear_widget_modules, _pkg_dir, _keep_stems

from bokeh.io import curdoc
from bokeh.layouts import column, row
from bokeh.models import Div

# ── Global CSS theme ──────────────────────────────────────────────
_theme_css = Div(text="""<style>
:root {
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --card-border: #e2e5ea;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff4ff;
  --text-primary: #1a1d23;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --destructive: #dc2626;
  --success: #059669;
  --warning: #d97706;
  --section-header: 600;
  --radius: 8px;
  --radius-sm: 6px;
}
body, .bk-root {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif !important;
  background: var(--bg) !important;
  color: var(--text-primary);
}
/* Card container utility */
.sae-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 14px 16px;
}
.sae-card-header {
  font-size: 13px;
  font-weight: var(--section-header);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 10px 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--card-border);
}
/* Section header */
.sae-section-title {
  font-size: 15px;
  font-weight: var(--section-header);
  color: var(--text-primary);
  margin: 0 0 8px 0;
}
/* Feature number badge */
.sae-feat-num {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 11px;
  color: var(--text-muted);
  background: #f3f4f6;
  padding: 1px 5px;
  border-radius: 3px;
}
/* Primary button override */
.bk-btn-primary {
  background-color: var(--accent) !important;
  border-color: var(--accent) !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 500 !important;
  font-size: 13px !important;
}
.bk-btn-primary:hover {
  background-color: var(--accent-hover) !important;
  border-color: var(--accent-hover) !important;
}
/* Success button override */
.bk-btn-success {
  background-color: var(--accent) !important;
  border-color: var(--accent) !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 500 !important;
  font-size: 13px !important;
}
.bk-btn-success:hover {
  background-color: var(--accent-hover) !important;
  border-color: var(--accent-hover) !important;
}
/* Warning (secondary) button override */
.bk-btn-warning {
  background-color: transparent !important;
  border: 1.5px solid var(--card-border) !important;
  color: var(--text-secondary) !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 500 !important;
  font-size: 13px !important;
}
.bk-btn-warning:hover {
  background-color: #f9fafb !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
/* Light button */
.bk-btn-light {
  border-radius: var(--radius-sm) !important;
  font-size: 13px !important;
  font-weight: 500 !important;
}
/* Default button */
.bk-btn-default {
  border-radius: var(--radius-sm) !important;
  font-size: 13px !important;
}
/* Slider labels */
.bk-Slider .bk-slider-title {
  font-size: 12px !important;
  color: var(--text-secondary) !important;
  font-weight: 500 !important;
}
/* Text inputs */
.bk-input {
  border-radius: var(--radius-sm) !important;
  border-color: var(--card-border) !important;
  font-size: 13px !important;
}
.bk-input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px var(--accent-light) !important;
}
.bk-input-group > label {
  font-size: 12px !important;
  font-weight: 500 !important;
  color: var(--text-secondary) !important;
}
/* DataTable styling */
.bk-data-table {
  border-radius: var(--radius) !important;
  overflow: hidden;
}
/* Patch figure */
.bk-Figure {
  border-radius: var(--radius) !important;
  overflow: hidden;
}
</style>""", visible=False)

from .datasets import load_all_datasets
from .state import _all_datasets, active_ds
if not _all_datasets:
    load_all_datasets()

from .brain import HAS_DYNADIFF
from .widgets import make_collapsible
from . import widgets

from .panels import feature as feature_panel
from .panels import feature_list as flist_panel
from .panels import steering as steer_panel
from .panels import clip_search as clip_panel
from .panels import examples as examples_panel

from .inference import warmup_gpu_runner


# ---------- SAE Summary div ----------

def _make_summary_html() -> str:
    ds = active_ds()
    n_umap_act     = int(ds['live_mask'].sum())
    n_truly_active = int((ds['freq'] > 0).sum())
    n_dead         = ds['d_model'] - n_truly_active
    tok_label      = f"{ds['patch_grid']}×{ds['patch_grid']} = {ds['patch_grid']**2} patches"
    backbone_label = ds.get('backbone', 'dinov2').upper()
    sae_url        = ds.get('sae_url')
    dl_row         = (f'<tr><td style="padding-right:12px;font-weight:500">SAE weights</td>'
                      f'<td><a href="{sae_url}" download style="color:#2563eb;text-decoration:none;'
                      f'font-weight:500">⬇ Download</a></td></tr>'
                      if sae_url else '')
    return f"""
<div class="sae-card" style="margin-bottom:8px;">
<div class="sae-card-header">SAE Summary</div>
<table style="font-size:13px;line-height:1.7;color:#4b5563">
<tr><td style="padding-right:12px;font-weight:500">Active model</td><td><b style="color:#2563eb">{ds['label']}</b></td></tr>
<tr><td style="padding-right:12px;font-weight:500">Backbone</td><td>{backbone_label}</td></tr>
<tr><td style="padding-right:12px;font-weight:500">Dictionary size</td><td>{ds['d_model']:,}</td></tr>
<tr><td style="padding-right:12px;font-weight:500">Active (fired ≥1)</td><td>{n_truly_active:,} ({100*n_truly_active/ds['d_model']:.1f}%)</td></tr>
<tr><td style="padding-right:12px;font-weight:500">Dead</td><td>{n_dead:,} ({100*n_dead/ds['d_model']:.1f}%)</td></tr>
<tr><td style="padding-right:12px;font-weight:500">Images</td><td>{ds['n_images']:,}</td></tr>
<tr><td style="padding-right:12px;font-weight:500">Tokens/image</td><td>{tok_label}</td></tr>
{dl_row}
</table>
</div>"""

summary_div = Div(text=_make_summary_html(), width=600)


# ---------- Global feature navigation callbacks ----------

def _on_go_click():
    try:
        feat = int(widgets.feature_input.value)
        if 0 <= feat < active_ds()['d_model']:
            feature_panel.select_and_display(feat)
        else:
            feature_panel.stats_div.text = (
                f"<h3>Feature {feat} out of range (0–{active_ds()['d_model']-1})</h3>")
    except ValueError:
        feature_panel.stats_div.text = "<h3>Please enter a valid integer</h3>"

widgets.go_button.on_click(_on_go_click)


def _on_random():
    active = active_ds()['active_feats']
    if not active:
        return
    feat = random.choice(active)
    widgets.feature_input.value = str(feat)
    feature_panel.select_and_display(feat)

widgets.random_btn.on_click(_on_random)


# ---------- JS bridge for gallery / active-feature tile clicks ----------
# Installed once at document_ready so all gallery HTML tiles can call back.
# We extend the bridge JS with the patch-load bridge widget reference.

from bokeh.models import CustomJS as _CustomJS
_full_bridge_js = _CustomJS(
    args=dict(
        feat_inp=flist_panel.gallery_bridge_input,
        page_inp=flist_panel.gallery_page_input,
        patch_inp=steer_panel.patch_load_bridge,
    ),
    code="""
        window._sae_select_feature = function(feat_idx) {
            feat_inp.value = String(feat_idx) + '|' + Date.now();
        };
        window._sae_gallery_page = function(page_num) {
            page_inp.value = String(page_num) + '|' + Date.now();
        };
        window._sae_load_patch_image = function(img_idx) {
            patch_inp.value = String(img_idx) + '|' + Date.now();
        };
    """,
)
curdoc().js_on_event('document_ready', _full_bridge_js)


# ============================================================
# UPPER WORKSPACE — Active Steering & Composition
# ============================================================

# Left sidebar: example presets
_upper_left = column(
    examples_panel.examples_panel,
    width=210,
    styles={"border-right": "1px solid var(--card-border, #e2e5ea)",
            "padding-right": "10px", "margin-right": "8px",
            "min-height": "400px"},
)

# Patch column: GT brain above, then patch explorer
_patch_header = Div(
    text='<div class="sae-card-header" style="border-bottom:none">GT Brain Response</div>',
    width=410,
)
_patch_col = column(
    _patch_header,
    steer_panel.gt_brain_div,
    steer_panel.patch_explorer_panel,
    styles={"background": "var(--card-bg, #fff)",
            "border": "1px solid var(--card-border, #e2e5ea)",
            "border-radius": "8px", "padding": "12px",
            "box-shadow": "0 1px 3px rgba(0,0,0,0.06)"},
)

# Active features column: steering sum brain above, then feature tiles
_active_header = Div(
    text='<div class="sae-card-header" style="border-bottom:none">Steering Direction</div>',
    width=460,
)
_active_features_header = Div(
    text='<div class="sae-card-header" style="border-bottom:none;margin-top:8px">'
         'Active Features</div>',
    width=460,
)
_active_column = column(
    _active_header,
    steer_panel.steer_brain_div,
    _active_features_header,
    steer_panel.active_features_div,
    width=460,
    styles={"background": "var(--card-bg, #fff)",
            "border": "1px solid var(--card-border, #e2e5ea)",
            "border-radius": "8px", "padding": "12px",
            "box-shadow": "0 1px 3px rgba(0,0,0,0.06)"},
)

# DynaDiff column: steered brain above output + controls
if HAS_DYNADIFF:
    _dd_controls_header = Div(
        text='<div class="sae-card-header" style="border-bottom:none">'
             'Expected Steered Brain</div>',
        width=480,
    )
    _dd_run_header = Div(
        text='<div class="sae-card-header" style="border-bottom:none;margin-top:8px">'
             'Brain Steering</div>',
        width=480,
    )
    _dd_controls = column(
        _dd_controls_header,
        steer_panel.steered_brain_div,
        _dd_run_header,
        steer_panel.dynadiff_panel,
        width=480,
        styles={"background": "var(--card-bg, #fff)",
                "border": "1px solid var(--card-border, #e2e5ea)",
                "border-radius": "8px", "padding": "12px",
                "box-shadow": "0 1px 3px rgba(0,0,0,0.06)"},
    )
else:
    _dd_controls = Div(text="", width=1)

_upper_center = row(
    _patch_col,
    _active_column,
    _dd_controls,
    styles={"gap": "12px"},
)

upper_workspace = row(_upper_left, _upper_center)


# ============================================================
# DIVIDER
# ============================================================

divider = Div(
    text="<hr style='border:none;border-top:1px solid #e2e5ea;margin:16px 0'>",
    width=1500,
)


# ============================================================
# LOWER WORKSPACE — Feature Search & Analysis
# ============================================================

# Left: CLIP search + gallery
if not clip_panel.clip_unavailable:
    _clip_row = row(
        clip_panel.clip_query_input,
        clip_panel.clip_search_btn,
        styles={"margin-bottom": "6px", "align-items": "end"},
    )
else:
    _clip_row = Div(
        text="<i style='color:var(--text-muted, #9ca3af);font-size:11px'>"
             "CLIP search unavailable</i>",
        width=300,
    )

_search_header = Div(
    text='<div class="sae-card-header" style="border-bottom:none">'
         'Feature Search</div>',
    width=300,
)

_clip_results = clip_panel.clip_results_div if not clip_panel.clip_unavailable else Div(text="", width=1)

lower_left = column(
    _search_header,
    _clip_row,
    _clip_results,
    # flist_panel.sort_select,   # re-enable for CLIP × φ sort
    flist_panel.gallery_div,
    flist_panel.gallery_bridge_input,
    flist_panel.gallery_page_input,
    width=340,
    styles={"background": "var(--card-bg, #fff)",
            "border": "1px solid var(--card-border, #e2e5ea)",
            "border-radius": "8px", "padding": "12px",
            "box-shadow": "0 1px 3px rgba(0,0,0,0.06)",
            "margin-right": "12px"},
)

# Center: feature name + Add to Steer + labeler + MEI gallery
_zoom_controls = row(
    widgets.zoom_slider, widgets.heatmap_alpha_slider,
    styles={"gap": "16px", "padding": "4px 0 8px 0"},
)
_feature_header_row = row(
    feature_panel.stats_div,
    feature_panel.add_steer_btn,
    styles={"align-items": "center"},
)

_labeler_row = row(
    flist_panel.gemini_btn, flist_panel.gemini_status_div,
    styles={"align-items": "center", "margin-bottom": "4px"},
)

lower_center = column(
    feature_panel.status_div,
    _feature_header_row,
    flist_panel.name_input,
    _labeler_row,
    _zoom_controls,
    feature_panel.top_heatmap_div,
    width=700,
    styles={"background": "var(--card-bg, #fff)",
            "border": "1px solid var(--card-border, #e2e5ea)",
            "border-radius": "8px", "padding": "14px 16px",
            "box-shadow": "0 1px 3px rgba(0,0,0,0.06)"},
)

# Right: brain profile + summary
lower_right = column(
    feature_panel.brain_div,
    make_collapsible("SAE Summary", summary_div),
    width=580,
    styles={"background": "var(--card-bg, #fff)",
            "border": "1px solid var(--card-border, #e2e5ea)",
            "border-radius": "8px", "padding": "14px 16px",
            "box-shadow": "0 1px 3px rgba(0,0,0,0.06)",
            "margin-left": "12px"},
)

lower_workspace = row(lower_left, lower_center, lower_right)


# ============================================================
# ROOT LAYOUT
# ============================================================

layout = column(_theme_css, upper_workspace, divider, lower_workspace,
                steer_panel.patch_load_bridge,
                styles={"padding": "12px"})
curdoc().add_root(layout)
curdoc().title = "SAE Feature Explorer"

print("Explorer app ready!")

warmup_gpu_runner()