"""
APIClient - Agent - Central Theme Engine
All styling lives here in the global QSS.
UI widgets use setObjectName() selectors - never inline setStyleSheet() for static colors.
Only truly dynamic values (per-request method color, status badge) stay inline.
"""
from PyQt6.QtGui import QColor, QPalette
from PyQt6.QtWidgets import QApplication


# ── Color Palettes ────────────────────────────────────────────────────────────

class DarkColors:
    BG_DARKEST   = "#0D0D0D"
    BG_SIDEBAR   = "#111111"
    BG_MAIN      = "#181818"
    BG_PANEL     = "#1E1E1E"
    BG_ELEVATED  = "#242424"
    BG_INPUT     = "#2A2A2A"
    BG_HOVER     = "#303030"
    BG_SELECTED  = "#383838"

    BORDER       = "#2C2C2C"
    BORDER_FOCUS = "#505050"

    TEXT_PRIMARY   = "#E4E4E4"
    TEXT_SECONDARY = "#8A8A8A"
    TEXT_MUTED     = "#505050"
    TEXT_DISABLED  = "#3A3A3A"

    ACCENT         = "#E05C2C"
    ACCENT_HOVER   = "#F06030"
    ACCENT_PRESSED = "#C04C20"
    ACCENT_SUBTLE  = "#2A1208"

    SUCCESS = "#3FB950"
    WARNING = "#D29922"
    ERROR   = "#F85149"
    INFO    = "#58A6FF"

    METHOD_GET     = "#61AFFE"
    METHOD_POST    = "#49CC90"
    METHOD_PUT     = "#FCA130"
    METHOD_PATCH   = "#50E3C2"
    METHOD_DELETE  = "#F93E3E"
    METHOD_HEAD    = "#9012FE"
    METHOD_OPTIONS = "#0D5AA7"

    STATUS_1XX = "#8C8C8C"
    STATUS_2XX = "#3FB950"
    STATUS_3XX = "#D29922"
    STATUS_4XX = "#F85149"
    STATUS_5XX = "#FF4444"


class LightColors:
    BG_DARKEST   = "#E2E2E2"
    BG_SIDEBAR   = "#ECECEC"
    BG_MAIN      = "#F2F2F2"
    BG_PANEL     = "#FFFFFF"
    BG_ELEVATED  = "#E8E8E8"
    BG_INPUT     = "#FFFFFF"
    BG_HOVER     = "#DCDCDC"
    BG_SELECTED  = "#D0D0D0"

    BORDER       = "#D0D0D0"
    BORDER_FOCUS = "#A0A0A0"

    TEXT_PRIMARY   = "#1A1A1A"
    TEXT_SECONDARY = "#555555"
    TEXT_MUTED     = "#999999"
    TEXT_DISABLED  = "#BBBBBB"

    ACCENT         = "#C94A14"
    ACCENT_HOVER   = "#E05520"
    ACCENT_PRESSED = "#A83C0E"
    ACCENT_SUBTLE  = "#FDEEE6"

    SUCCESS = "#1A7F37"
    WARNING = "#7A5800"
    ERROR   = "#C01020"
    INFO    = "#0550AE"

    METHOD_GET     = "#0550AE"
    METHOD_POST    = "#1A7F37"
    METHOD_PUT     = "#7A3800"
    METHOD_PATCH   = "#116329"
    METHOD_DELETE  = "#C01020"
    METHOD_HEAD    = "#6639BA"
    METHOD_OPTIONS = "#0550AE"

    STATUS_1XX = "#777777"
    STATUS_2XX = "#1A7F37"
    STATUS_3XX = "#7A5800"
    STATUS_4XX = "#C01020"
    STATUS_5XX = "#C01020"


# ── Active palette (module-level singleton) ───────────────────────────────────
Colors = DarkColors
_is_dark = True


def method_color(method: str) -> str:
    return {
        "GET":     Colors.METHOD_GET,
        "POST":    Colors.METHOD_POST,
        "PUT":     Colors.METHOD_PUT,
        "PATCH":   Colors.METHOD_PATCH,
        "DELETE":  Colors.METHOD_DELETE,
        "HEAD":    Colors.METHOD_HEAD,
        "OPTIONS": Colors.METHOD_OPTIONS,
    }.get(method.upper(), Colors.TEXT_SECONDARY)


def status_color(code: int) -> str:
    if code < 200: return Colors.STATUS_1XX
    if code < 300: return Colors.STATUS_2XX
    if code < 400: return Colors.STATUS_3XX
    if code < 500: return Colors.STATUS_4XX
    return Colors.STATUS_5XX


# ── Global Stylesheet ─────────────────────────────────────────────────────────
# Everything static lives here. Object names are the API between theme and UI.

def _build_stylesheet(C) -> str:
    return f"""

/* ════════════════════════════════════════════════════════
   BASE
════════════════════════════════════════════════════════ */
QWidget {{
    background-color: {C.BG_MAIN};
    color: {C.TEXT_PRIMARY};
    font-family: "Segoe UI", "SF Pro Text", "Inter", "Helvetica Neue", sans-serif;
    font-size: 13px;
    border: none;
    outline: none;
}}
QMainWindow, QDialog {{
    background-color: {C.BG_PANEL};
}}

/* ════════════════════════════════════════════════════════
   SCROLLBARS
════════════════════════════════════════════════════════ */
QScrollBar:vertical {{
    background: transparent; width: 8px; margin: 0;
}}
QScrollBar::handle:vertical {{
    background: {C.BORDER_FOCUS}; border-radius: 4px; min-height: 28px;
}}
QScrollBar::handle:vertical:hover {{ background: {C.TEXT_MUTED}; }}
QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {{ height: 0; }}
QScrollBar:horizontal {{
    background: transparent; height: 8px; margin: 0;
}}
QScrollBar::handle:horizontal {{
    background: {C.BORDER_FOCUS}; border-radius: 4px; min-width: 28px;
}}
QScrollBar::handle:horizontal:hover {{ background: {C.TEXT_MUTED}; }}
QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {{ width: 0; }}

/* ════════════════════════════════════════════════════════
   SPLITTER
════════════════════════════════════════════════════════ */
QSplitter::handle {{ background: {C.BORDER}; }}
QSplitter::handle:horizontal {{ width: 1px; }}
QSplitter::handle:vertical   {{ height: 1px; }}

/* ════════════════════════════════════════════════════════
   MENU
════════════════════════════════════════════════════════ */
QMenuBar {{
    background-color: {C.BG_DARKEST};
    color: {C.TEXT_SECONDARY};
    border-bottom: 1px solid {C.BORDER};
    padding: 2px 4px;
    spacing: 4px;
}}
QMenuBar::item {{
    background: transparent; padding: 4px 10px; border-radius: 4px;
}}
QMenuBar::item:selected, QMenuBar::item:pressed {{
    background-color: {C.BG_ELEVATED}; color: {C.TEXT_PRIMARY};
}}
QMenu {{
    background-color: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 6px;
    padding: 4px;
}}
QMenu::item {{ padding: 7px 28px 7px 12px; border-radius: 4px; }}
QMenu::item:selected {{ background-color: {C.BG_HOVER}; }}
QMenu::item:disabled {{ color: {C.TEXT_MUTED}; }}
QMenu::separator {{ height: 1px; background: {C.BORDER}; margin: 4px 8px; }}

/* ════════════════════════════════════════════════════════
   INPUTS
════════════════════════════════════════════════════════ */
QLineEdit {{
    background-color: {C.BG_INPUT};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    padding: 6px 10px;
    selection-background-color: {C.ACCENT};
}}
QLineEdit:focus {{
    border: 1px solid {C.BORDER_FOCUS};
    background-color: {C.BG_ELEVATED};
}}
QLineEdit:disabled {{
    color: {C.TEXT_DISABLED};
    background-color: {C.BG_MAIN};
}}
QLineEdit::placeholder {{ color: {C.TEXT_MUTED}; }}

QTextEdit, QPlainTextEdit {{
    background-color: {C.BG_INPUT};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    padding: 6px;
    selection-background-color: {C.ACCENT};
}}
QTextEdit:focus, QPlainTextEdit:focus {{
    border: 1px solid {C.BORDER_FOCUS};
}}

QSpinBox {{
    background-color: {C.BG_INPUT};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    padding: 5px 8px;
}}
QSpinBox:focus {{ border-color: {C.BORDER_FOCUS}; }}
QSpinBox::up-button, QSpinBox::down-button {{
    background: {C.BG_ELEVATED};
    border: none;
    width: 18px;
}}
QSpinBox::up-button:hover, QSpinBox::down-button:hover {{
    background: {C.BG_HOVER};
}}

/* ════════════════════════════════════════════════════════
   COMBOBOX
════════════════════════════════════════════════════════ */
QComboBox {{
    background-color: {C.BG_INPUT};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    padding: 5px 10px;
    min-width: 80px;
}}
QComboBox:hover {{ border-color: {C.BORDER_FOCUS}; }}
QComboBox:focus {{ border-color: {C.BORDER_FOCUS}; }}
QComboBox::drop-down {{ border: none; width: 20px; subcontrol-origin: padding; }}
QComboBox::down-arrow {{ width: 10px; height: 10px; }}
QComboBox QAbstractItemView {{
    background-color: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 4px;
    selection-background-color: {C.BG_SELECTED};
    outline: none;
    padding: 2px;
}}

/* ════════════════════════════════════════════════════════
   CHECKBOX
════════════════════════════════════════════════════════ */
QCheckBox {{
    color: {C.TEXT_SECONDARY};
    spacing: 6px;
    background: transparent;
}}
QCheckBox::indicator {{
    width: 14px; height: 14px;
    border: 1px solid {C.BORDER_FOCUS};
    border-radius: 3px;
    background: {C.BG_INPUT};
}}
QCheckBox::indicator:checked {{
    background: {C.ACCENT}; border-color: {C.ACCENT};
}}

/* ════════════════════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════════════════ */
QPushButton {{
    background-color: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    padding: 6px 14px;
    font-weight: 500;
}}
QPushButton:hover {{
    background-color: {C.BG_HOVER};
    border-color: {C.BORDER_FOCUS};
}}
QPushButton:pressed {{ background-color: {C.BG_SELECTED}; }}
QPushButton:disabled {{ color: {C.TEXT_MUTED}; border-color: {C.BORDER}; }}

QPushButton#accent {{
    background-color: {C.ACCENT};
    color: #FFFFFF;
    border: none;
    font-weight: 600;
}}
QPushButton#accent:hover   {{ background-color: {C.ACCENT_HOVER}; }}
QPushButton#accent:pressed {{ background-color: {C.ACCENT_PRESSED}; }}
QPushButton#accent:disabled {{
    background-color: {C.ACCENT_SUBTLE};
    color: {C.TEXT_MUTED};
}}

QPushButton#ghost {{
    background: transparent;
    border: none;
    color: {C.TEXT_SECONDARY};
    padding: 4px 8px;
    border-radius: 4px;
}}
QPushButton#ghost:hover {{
    color: {C.TEXT_PRIMARY};
    background-color: {C.BG_HOVER};
}}
QPushButton#ghost:pressed {{ background-color: {C.BG_SELECTED}; }}

QPushButton#danger {{
    background-color: transparent;
    color: {C.ERROR};
    border: 1px solid {C.ERROR};
}}
QPushButton#danger:hover {{ background-color: {C.ACCENT_SUBTLE}; }}

QPushButton#sendBtn {{
    background-color: {C.ACCENT};
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px 22px;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.3px;
}}
QPushButton#sendBtn:hover   {{ background-color: {C.ACCENT_HOVER}; }}
QPushButton#sendBtn:pressed {{ background-color: {C.ACCENT_PRESSED}; }}
QPushButton#sendBtn:disabled {{
    background-color: {C.ACCENT_SUBTLE};
    color: {C.TEXT_MUTED};
}}

/* ════════════════════════════════════════════════════════
   TABS
════════════════════════════════════════════════════════ */
QTabWidget::pane {{
    border: none;
    background-color: {C.BG_PANEL};
}}
QTabBar {{ background: transparent; }}
QTabBar::tab {{
    background: transparent;
    color: {C.TEXT_SECONDARY};
    border: none;
    border-bottom: 2px solid transparent;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 500;
}}
QTabBar::tab:selected {{
    color: {C.TEXT_PRIMARY};
    border-bottom: 2px solid {C.ACCENT};
}}
QTabBar::tab:hover:!selected {{
    color: {C.TEXT_PRIMARY};
    background-color: {C.BG_HOVER};
    border-radius: 4px 4px 0 0;
}}
QTabBar::close-button {{
    subcontrol-position: right;
    border-radius: 3px;
    margin: 3px 2px;
    padding: 0;
    width: 14px;
    height: 14px;
}}

/* Request/Response inner tab bars sit on BG_MAIN strip */
QTabWidget#innerTabs QTabBar {{
    background: {C.BG_MAIN};
    border-bottom: 1px solid {C.BORDER};
}}

/* Top workspace tab bar (HTTP / WebSocket / Mock Server) */
QTabWidget#workspaceTabs QTabBar::tab {{
    background: {C.BG_DARKEST};
    color: {C.TEXT_SECONDARY};
    border: none;
    border-right: 1px solid {C.BORDER};
    padding: 10px 20px;
    font-size: 12px;
    font-weight: 600;
    border-bottom: none;
    border-top: 2px solid transparent;
}}
QTabWidget#workspaceTabs QTabBar::tab:selected {{
    background: {C.BG_MAIN};
    color: {C.TEXT_PRIMARY};
    border-top: 2px solid {C.ACCENT};
}}
QTabWidget#workspaceTabs QTabBar::tab:hover:!selected {{
    background: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
}}

/* ════════════════════════════════════════════════════════
   TABLES
════════════════════════════════════════════════════════ */
QTableWidget {{
    background-color: {C.BG_PANEL};
    alternate-background-color: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: none;
    gridline-color: {C.BORDER};
    selection-background-color: {C.BG_SELECTED};
    selection-color: {C.TEXT_PRIMARY};
}}
QTableWidget::item {{
    padding: 5px 8px;
    border-bottom: 1px solid {C.BORDER};
}}
QTableWidget::item:selected {{
    background-color: {C.BG_SELECTED};
    color: {C.TEXT_PRIMARY};
}}
QHeaderView::section {{
    background-color: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: none;
    border-bottom: 1px solid {C.BORDER};
    border-right: 1px solid {C.BORDER};
    padding: 6px 8px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}}
QHeaderView::section:last {{ border-right: none; }}

/* ════════════════════════════════════════════════════════
   TREE
════════════════════════════════════════════════════════ */
QTreeWidget {{
    background-color: {C.BG_SIDEBAR};
    color: {C.TEXT_PRIMARY};
    border: none;
    outline: none;
    show-decoration-selected: 1;
}}
QTreeWidget::item {{
    padding: 4px 4px;
    border-radius: 3px;
}}
QTreeWidget::item:selected {{
    background-color: {C.BG_SELECTED};
    color: {C.TEXT_PRIMARY};
}}
QTreeWidget::item:hover:!selected {{ background-color: {C.BG_HOVER}; }}
QTreeWidget::branch {{ background: {C.BG_SIDEBAR}; }}

/* ════════════════════════════════════════════════════════
   LIST
════════════════════════════════════════════════════════ */
QListWidget {{
    background-color: {C.BG_PANEL};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    outline: none;
}}
QListWidget::item {{ padding: 8px 10px; border-radius: 3px; }}
QListWidget::item:selected {{
    background-color: {C.BG_SELECTED}; color: {C.TEXT_PRIMARY};
}}
QListWidget::item:hover:!selected {{ background-color: {C.BG_HOVER}; }}

/* ════════════════════════════════════════════════════════
   SIDEBAR LIST (no border, flush)
════════════════════════════════════════════════════════ */
QListWidget#sidebarList {{
    background: {C.BG_SIDEBAR};
    border: none;
    border-radius: 0;
}}
QListWidget#sidebarList::item {{
    padding: 10px 14px;
    border-bottom: 1px solid {C.BORDER};
    border-radius: 0;
    font-size: 13px;
}}
QListWidget#sidebarList::item:selected {{
    background: {C.BG_SELECTED}; color: {C.TEXT_PRIMARY};
}}
QListWidget#sidebarList::item:hover:!selected {{ background: {C.BG_HOVER}; }}

/* ════════════════════════════════════════════════════════
   STATUS BAR
════════════════════════════════════════════════════════ */
QStatusBar {{
    background-color: {C.BG_DARKEST};
    color: {C.TEXT_SECONDARY};
    border-top: 1px solid {C.BORDER};
    font-size: 11px;
    padding: 0 8px;
}}
QStatusBar::item {{ border: none; }}

/* ════════════════════════════════════════════════════════
   PROGRESS BAR
════════════════════════════════════════════════════════ */
QProgressBar {{
    background-color: {C.BG_ELEVATED};
    border: 1px solid {C.BORDER};
    border-radius: 4px;
    height: 6px;
    text-align: center;
    color: transparent;
}}
QProgressBar::chunk {{
    background-color: {C.ACCENT}; border-radius: 4px;
}}

/* ════════════════════════════════════════════════════════
   GROUP BOX
════════════════════════════════════════════════════════ */
QGroupBox {{
    color: {C.TEXT_SECONDARY};
    border: 1px solid {C.BORDER};
    border-radius: 6px;
    margin-top: 8px;
    padding: 8px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}}
QGroupBox::title {{
    subcontrol-origin: margin; left: 10px; padding: 0 4px;
}}

/* ════════════════════════════════════════════════════════
   TOOLTIP
════════════════════════════════════════════════════════ */
QToolTip {{
    background-color: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 4px;
    padding: 5px 8px;
    font-size: 12px;
}}

/* ════════════════════════════════════════════════════════
   DIALOG BUTTON BOX
════════════════════════════════════════════════════════ */
QDialogButtonBox QPushButton {{ min-width: 80px; }}

/* ════════════════════════════════════════════════════════
   FRAME SEPARATORS
════════════════════════════════════════════════════════ */
QFrame[frameShape="4"], QFrame[frameShape="5"] {{
    background-color: {C.BORDER};
    border: none;
    max-height: 1px;
    max-width: 1px;
}}

/* ════════════════════════════════════════════════════════
   ── NAMED WIDGET RULES (setObjectName API) ──
════════════════════════════════════════════════════════ */

/* Top brand / env bar */
QWidget#envBar {{
    background-color: {C.BG_DARKEST};
    border-bottom: 1px solid {C.BORDER};
}}
QLabel#brandName {{
    color: {C.ACCENT};
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 2px;
    background: transparent;
}}
QLabel#brandSub {{
    color: {C.TEXT_MUTED};
    font-size: 11px;
    font-weight: 500;
    background: transparent;
}}
QLabel#envChip {{
    color: {C.TEXT_MUTED};
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    background: transparent;
}}

/* Sidebar */
QWidget#sidebar {{
    background-color: {C.BG_SIDEBAR};
    border-right: 1px solid {C.BORDER};
}}
QWidget#sidebarHeader {{
    background-color: {C.BG_SIDEBAR};
    border-bottom: 1px solid {C.BORDER};
}}
QWidget#sidebarSearch {{
    background-color: {C.BG_SIDEBAR};
}}

/* URL bar strip */
QWidget#urlBarStrip {{
    background-color: {C.BG_MAIN};
    border-bottom: 1px solid {C.BORDER};
}}
QLineEdit#urlBar {{
    background-color: {C.BG_INPUT};
    border: 1.5px solid {C.BORDER};
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 13px;
    font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
    color: {C.TEXT_PRIMARY};
}}
QLineEdit#urlBar:focus {{
    border-color: {C.ACCENT};
    background-color: {C.BG_ELEVATED};
}}

/* Method combo (color set inline per method, only layout here) */
QComboBox#methodCombo {{
    font-weight: 800;
    font-size: 12px;
    border-radius: 6px;
    padding: 8px 10px;
    min-width: 100px;
    border: 1px solid {C.BORDER};
    background-color: {C.BG_INPUT};
}}
QComboBox#methodCombo:hover {{ border-color: {C.BORDER_FOCUS}; }}
QComboBox#methodCombo QAbstractItemView {{
    background: {C.BG_ELEVATED};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    selection-background-color: {C.BG_SELECTED};
}}

/* Inner request/response tab strip */
QWidget#tabStrip {{
    background-color: {C.BG_MAIN};
    border-bottom: 1px solid {C.BORDER};
}}

/* Response top bar */
QWidget#responseBar {{
    background-color: {C.BG_MAIN};
    border-top: 1px solid {C.BORDER};
    border-bottom: 1px solid {C.BORDER};
}}
QLabel#responseTitle {{
    color: {C.TEXT_MUTED};
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.2px;
    background: transparent;
}}
QLabel#metaLabel {{
    color: {C.TEXT_MUTED};
    font-size: 11px;
    background: transparent;
    padding: 0 6px;
}}

/* Section/panel headers used in dialogs */
QWidget#panelHeader {{
    background-color: {C.BG_ELEVATED};
    border-bottom: 1px solid {C.BORDER};
}}
QWidget#panelFooter {{
    background-color: {C.BG_ELEVATED};
    border-top: 1px solid {C.BORDER};
}}
QWidget#sectionHeader {{
    background-color: {C.BG_SIDEBAR};
    border-bottom: 1px solid {C.BORDER};
}}
QWidget#panelBody {{
    background-color: {C.BG_PANEL};
}}

/* Labels inside panels */
QLabel#panelTitle {{
    font-size: 14px;
    font-weight: 700;
    color: {C.TEXT_PRIMARY};
    background: transparent;
}}
QLabel#sectionLabel {{
    color: {C.TEXT_MUTED};
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    background: transparent;
}}
QLabel#hintText {{
    color: {C.TEXT_MUTED};
    font-size: 11px;
    background: transparent;
}}
QLabel#fieldLabel {{
    color: {C.TEXT_SECONDARY};
    font-size: 12px;
    background: transparent;
}}

/* Body/code editors */
QTextEdit#codeEditor {{
    background-color: {C.BG_PANEL};
    color: {C.TEXT_PRIMARY};
    border: none;
    padding: 8px;
    font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
    font-size: 11px;
}}

/* Loading overlay */
QWidget#loadingOverlay {{
    background-color: {C.BG_PANEL};
}}
QLabel#loadingLabel {{
    color: {C.TEXT_MUTED};
    font-size: 13px;
    background: transparent;
}}

/* Search in response bar */
QLineEdit#searchBar {{
    background: {C.BG_INPUT};
    border: 1px solid {C.BORDER};
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 12px;
    color: {C.TEXT_PRIMARY};
}}
QLineEdit#searchBar:focus {{ border-color: {C.BORDER_FOCUS}; }}

/* Sidebar filter input */
QLineEdit#filterInput {{
    background: {C.BG_ELEVATED};
    border: 1px solid {C.BORDER};
    border-radius: 4px;
    padding: 5px 8px;
    font-size: 12px;
    color: {C.TEXT_PRIMARY};
}}
QLineEdit#filterInput:focus {{ border-color: {C.BORDER_FOCUS}; }}

/* WebSocket / Mock status indicator labels */
QLabel#statusOk {{
    color: {C.SUCCESS};
    font-size: 12px;
    font-weight: 600;
    background: transparent;
}}
QLabel#statusWarn {{
    color: {C.WARNING};
    font-size: 12px;
    font-weight: 600;
    background: transparent;
}}
QLabel#statusErr {{
    color: {C.ERROR};
    font-size: 12px;
    font-weight: 600;
    background: transparent;
}}

/* Auth "none" hint */
QLabel#authNone {{
    color: {C.TEXT_MUTED};
    padding: 12px;
    background: transparent;
}}

/* Sidebar panel (environment dialog left pane, etc.) */
QWidget#sidebarPanel {{
    background-color: {C.BG_SIDEBAR};
}}

/* Custom tab close button */
QPushButton#tabCloseBtn {{
    background: transparent;
    border: none;
    border-radius: 3px;
    color: {C.TEXT_MUTED};
    font-size: 14px;
    font-weight: 700;
    padding: 0;
}}
QPushButton#tabCloseBtn:hover {{
    background-color: {C.ERROR};
    color: #FFFFFF;
}}

/* AI Assistant panel */
QWidget#aiPanel {{
    background-color: {C.BG_PANEL};
}}
QTextEdit#aiOutput {{
    background-color: {C.BG_INPUT};
    color: {C.TEXT_PRIMARY};
    border: 1px solid {C.BORDER};
    border-radius: 5px;
    padding: 8px;
    font-size: 12px;
}}
QLabel#aiStatusLabel {{
    color: {C.TEXT_MUTED};
    font-size: 11px;
    background: transparent;
}}

/* ── AI Chat Panel ─────────────────────────────────────── */
QWidget#aiChatPanel {{
    background-color: {C.BG_SIDEBAR};
    border-left: 1px solid {C.BORDER};
}}
QWidget#aiChatHeader {{
    background-color: {C.BG_ELEVATED};
    border-bottom: 1px solid {C.BORDER};
}}
QLabel#aiChatTitle {{
    color: {C.ACCENT};
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: transparent;
}}
QWidget#chatArea {{
    background-color: {C.BG_SIDEBAR};
}}
QFrame#userBubble {{
    background-color: {C.ACCENT_SUBTLE};
    border: 1px solid {C.BORDER};
    border-left: 3px solid {C.ACCENT};
    border-radius: 6px;
    margin: 0px;
}}
QFrame#aiBubble {{
    background-color: {C.BG_ELEVATED};
    border: 1px solid {C.BORDER};
    border-radius: 6px;
    margin: 0px;
}}
QLabel#chatRoleLabel {{
    font-size: 10px;
    font-weight: 700;
    color: {C.TEXT_MUTED};
    background: transparent;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}}
QLabel#chatMessageText {{
    color: {C.TEXT_PRIMARY};
    background: transparent;
    font-size: 12px;
    line-height: 1.6;
}}
QWidget#chatInputArea {{
    background-color: {C.BG_ELEVATED};
    border-top: 1px solid {C.BORDER};
}}
QTextEdit#chatInput {{
    background-color: {C.BG_INPUT};
    border: 1px solid {C.BORDER};
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12px;
    color: {C.TEXT_PRIMARY};
}}
QTextEdit#chatInput:focus {{
    border-color: {C.ACCENT};
}}
QWidget#quickActions {{
    background-color: {C.BG_MAIN};
    border-top: 1px solid {C.BORDER};
    border-bottom: 1px solid {C.BORDER};
}}
QPushButton#qaBtn {{
    background-color: {C.BG_INPUT};
    border: 1px solid {C.BORDER};
    border-radius: 10px;
    padding: 2px 8px;
    font-size: 11px;
    color: {C.TEXT_SECONDARY};
    font-weight: 500;
}}
QPushButton#qaBtn:hover {{
    background-color: {C.BG_HOVER};
    border-color: {C.ACCENT};
    color: {C.TEXT_PRIMARY};
}}
QFrame#applyBlock {{
    background-color: {C.BG_PANEL};
    border: 1px solid {C.BORDER};
    border-left: 3px solid {C.ACCENT};
    border-radius: 4px;
}}
QTextEdit#applyCode {{
    background-color: transparent;
    border: none;
    padding: 4px;
    font-size: 10px;
    font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
    color: {C.TEXT_SECONDARY};
}}

"""


def _apply_palette(app: QApplication, C):
    palette = QPalette()
    palette.setColor(QPalette.ColorRole.Window,          QColor(C.BG_MAIN))
    palette.setColor(QPalette.ColorRole.WindowText,      QColor(C.TEXT_PRIMARY))
    palette.setColor(QPalette.ColorRole.Base,            QColor(C.BG_INPUT))
    palette.setColor(QPalette.ColorRole.AlternateBase,   QColor(C.BG_ELEVATED))
    palette.setColor(QPalette.ColorRole.Text,            QColor(C.TEXT_PRIMARY))
    palette.setColor(QPalette.ColorRole.PlaceholderText, QColor(C.TEXT_MUTED))
    palette.setColor(QPalette.ColorRole.Button,          QColor(C.BG_ELEVATED))
    palette.setColor(QPalette.ColorRole.ButtonText,      QColor(C.TEXT_PRIMARY))
    palette.setColor(QPalette.ColorRole.Highlight,       QColor(C.ACCENT))
    palette.setColor(QPalette.ColorRole.HighlightedText, QColor("#FFFFFF"))
    palette.setColor(QPalette.ColorRole.Link,            QColor(C.INFO))
    palette.setColor(QPalette.ColorRole.ToolTipBase,     QColor(C.BG_ELEVATED))
    palette.setColor(QPalette.ColorRole.ToolTipText,     QColor(C.TEXT_PRIMARY))
    app.setPalette(palette)


def apply(app: QApplication, dark: bool = True):
    global Colors, _is_dark
    _is_dark = dark
    Colors = DarkColors if dark else LightColors
    app.setStyle("Fusion")
    _apply_palette(app, Colors)
    app.setStyleSheet(_build_stylesheet(Colors))


def toggle(app: QApplication) -> bool:
    """Toggle dark/light theme. Returns True if now dark."""
    global _is_dark
    apply(app, dark=not _is_dark)
    return _is_dark


def is_dark() -> bool:
    return _is_dark


def restyle(widget, obj_name: str) -> None:
    """Change a widget's objectName and force Qt to re-evaluate CSS rules."""
    widget.setObjectName(obj_name)
    widget.style().unpolish(widget)
    widget.style().polish(widget)