import { CSSProperties } from "react";

/**
 * Design tokens - centralized values for consistency.
 */
const tokens = {
  // Font families
  fontSans: "'DM Sans', system-ui, sans-serif",
  fontSerif: "'Instrument Serif', Georgia, serif",
  fontMono: "'DM Mono', monospace",

  // Colors
  white: "#fff",
  textPrimary: "#fff",
  textSecondary: "rgba(255, 255, 255, 0.7)",
  textMuted: "rgba(255, 255, 255, 0.5)",
  textDim: "rgba(255, 255, 255, 0.4)",
  textDisabled: "rgba(255, 255, 255, 0.3)",

  // Accent colors
  accent: "#a78bfa",
  accentIndigo: "rgba(99, 102, 241, 0.9)",
  accentIndigoMuted: "rgba(129, 140, 248, 0.9)",

  // Status colors
  success: "rgba(34, 197, 94, 0.9)",
  successBg: "rgba(34, 197, 94, 0.2)",
  successBorder: "rgba(34, 197, 94, 0.3)",
  error: "#f87171",
  errorBg: "rgba(239, 68, 68, 0.15)",
  errorBorder: "rgba(239, 68, 68, 0.3)",

  // Surfaces
  surfaceBg: "rgba(255, 255, 255, 0.03)",
  surfaceBorder: "rgba(255, 255, 255, 0.08)",
  surfaceHover: "rgba(255, 255, 255, 0.05)",
  inputBg: "rgba(255, 255, 255, 0.05)",
  inputBorder: "rgba(255, 255, 255, 0.1)",

  // Gradients
  pageGradient: "linear-gradient(135deg, #0f0f23 0%, #1a1a3e 50%, #2d1b4e 100%)",
  primaryGradient: "linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%)",

  // Shadows
  cardShadow: "0 25px 50px -12px rgba(0, 0, 0, 0.5)",
  buttonShadow: "0 4px 14px rgba(99, 102, 241, 0.4)",

  // Border radius
  radiusSm: "6px",
  radiusMd: "8px",
  radiusLg: "12px",
  radiusXl: "16px",
  radius2xl: "20px",
  radius3xl: "24px",
} as const;

type StyleRecord = Record<string, CSSProperties>;

// =============================================================================
// Layout Styles
// =============================================================================

export const layoutStyles: StyleRecord = {
  /** Full-page main container with gradient background */
  main: {
    minHeight: "100vh",
    background: tokens.pageGradient,
    display: "flex",
    flexDirection: "column",
  },
  /** Centered loading indicator */
  loader: {
    flex: 1,
    display: "flex",
    alignItems: "center",
    justifyContent: "center",
    fontFamily: tokens.fontSans,
    color: tokens.textMuted,
    fontSize: "1.125rem",
  },
  /** Content area - centered (for cards/forms) */
  contentCentered: {
    flex: 1,
    display: "flex",
    alignItems: "center",
    justifyContent: "center",
    padding: "2rem",
  },
  /** Content area - scrollable (for tables/lists) */
  contentScrollable: {
    flex: 1,
    padding: "2rem",
    overflowY: "auto",
  },
  /** Max-width container for page content */
  pageContainer: {
    maxWidth: "1200px",
    margin: "0 auto",
    width: "100%",
  },
};

// =============================================================================
// Header Styles (for nav/app header - used by Header component)
// =============================================================================

export const headerStyles: StyleRecord = {
  header: {
    padding: "1.5rem 2rem",
    borderBottom: `1px solid ${tokens.surfaceBorder}`,
    display: "flex",
    justifyContent: "space-between",
    alignItems: "center",
  },
  nav: {
    display: "flex",
    alignItems: "center",
    gap: "0.75rem",
  },
  navLink: {
    fontFamily: tokens.fontSans,
    color: tokens.textMuted,
    fontSize: "0.875rem",
    textDecoration: "none",
    transition: "color 0.2s",
  },
  navDivider: {
    color: "rgba(255, 255, 255, 0.2)",
    fontSize: "0.75rem",
  },
  navCurrent: {
    fontFamily: tokens.fontSans,
    color: tokens.accent,
    fontSize: "0.875rem",
    fontWeight: 600,
  },
  userInfo: {
    display: "flex",
    alignItems: "center",
    gap: "1rem",
  },
  userEmail: {
    fontFamily: tokens.fontSans,
    color: "rgba(255, 255, 255, 0.6)",
    fontSize: "0.875rem",
  },
  logoutBtn: {
    fontFamily: tokens.fontSans,
    padding: "0.5rem 1rem",
    fontSize: "0.875rem",
    fontWeight: 500,
    background: tokens.surfaceHover,
    color: tokens.textSecondary,
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusMd,
    cursor: "pointer",
    transition: "all 0.2s",
  },
};

// =============================================================================
// Typography Styles
// =============================================================================

export const typographyStyles: StyleRecord = {
  /** Large page title - serif font */
  pageTitle: {
    fontFamily: tokens.fontSerif,
    fontSize: "2rem",
    fontWeight: 400,
    color: tokens.white,
    margin: 0,
    letterSpacing: "-0.02em",
  },
  /** Page subtitle text */
  pageSubtitle: {
    fontFamily: tokens.fontSans,
    color: tokens.textMuted,
    marginTop: "0.5rem",
    fontSize: "0.95rem",
  },
  /** Section title - uppercase, smaller */
  sectionTitle: {
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    fontWeight: 600,
    color: "rgba(255, 255, 255, 0.8)",
    margin: 0,
    textTransform: "uppercase",
    letterSpacing: "0.05em",
  },
  /** Section title - muted variant */
  sectionTitleMuted: {
    fontFamily: tokens.fontSans,
    fontSize: "1.1rem",
    fontWeight: 500,
    color: tokens.textMuted,
    marginBottom: "1rem",
  },
  /** Section hint text */
  sectionHint: {
    fontFamily: tokens.fontSans,
    fontSize: "0.8rem",
    color: tokens.textDim,
    margin: 0,
  },
};

// =============================================================================
// Card Styles
// =============================================================================

export const cardStyles: StyleRecord = {
  /** Standard card container */
  card: {
    background: tokens.surfaceBg,
    backdropFilter: "blur(10px)",
    border: `1px solid ${tokens.surfaceBorder}`,
    borderRadius: tokens.radius3xl,
    padding: "2.5rem",
    boxShadow: tokens.cardShadow,
  },
  /** Card header section */
  cardHeader: {
    marginBottom: "2rem",
  },
  /** Card title - serif, large */
  cardTitle: {
    fontFamily: tokens.fontSerif,
    fontSize: "2rem",
    fontWeight: 400,
    color: tokens.white,
    margin: 0,
    letterSpacing: "-0.02em",
  },
  /** Card subtitle */
  cardSubtitle: {
    fontFamily: tokens.fontSans,
    color: tokens.textMuted,
    marginTop: "0.5rem",
    fontSize: "0.95rem",
  },
  /** Smaller table/section card */
  tableCard: {
    background: tokens.surfaceBg,
    backdropFilter: "blur(10px)",
    border: `1px solid ${tokens.surfaceBorder}`,
    borderRadius: tokens.radius2xl,
    padding: "1.5rem",
    boxShadow: tokens.cardShadow,
  },
};

// =============================================================================
// Table Styles
// =============================================================================

export const tableStyles: StyleRecord = {
  tableHeader: {
    display: "flex",
    justifyContent: "space-between",
    alignItems: "center",
    marginBottom: "1rem",
    flexWrap: "wrap",
    gap: "1rem",
  },
  tableTitle: {
    fontFamily: tokens.fontSerif,
    fontSize: "1.5rem",
    fontWeight: 400,
    color: tokens.white,
    margin: 0,
  },
  totalCount: {
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    color: tokens.textDim,
  },
  tableWrapper: {
    overflowX: "auto",
  },
  table: {
    width: "100%",
    borderCollapse: "collapse",
    fontFamily: tokens.fontSans,
  },
  th: {
    textAlign: "left",
    padding: "0.75rem 1rem",
    fontSize: "0.75rem",
    fontWeight: 600,
    color: tokens.textDim,
    textTransform: "uppercase",
    letterSpacing: "0.05em",
    borderBottom: `1px solid ${tokens.surfaceBorder}`,
  },
  tr: {
    borderBottom: "1px solid rgba(255, 255, 255, 0.04)",
  },
  td: {
    padding: "0.875rem 1rem",
    fontSize: "0.875rem",
    color: tokens.textSecondary,
  },
  tdMono: {
    padding: "0.875rem 1rem",
    fontSize: "0.875rem",
    color: tokens.white,
    fontFamily: tokens.fontMono,
  },
  tdNum: {
    padding: "0.875rem 1rem",
    fontSize: "0.875rem",
    color: "rgba(255, 255, 255, 0.9)",
    fontFamily: tokens.fontMono,
  },
  tdDate: {
    padding: "0.875rem 1rem",
    fontSize: "0.75rem",
    color: tokens.textDim,
  },
  emptyRow: {
    padding: "2rem 1rem",
    textAlign: "center",
    color: tokens.textDisabled,
    fontSize: "0.875rem",
  },
  errorRow: {
    padding: "2rem 1rem",
    textAlign: "center",
    color: tokens.error,
    fontSize: "0.875rem",
  },
};

// =============================================================================
// Pagination Styles
// =============================================================================

export const paginationStyles: StyleRecord = {
  pagination: {
    display: "flex",
    justifyContent: "center",
    alignItems: "center",
    gap: "1rem",
    marginTop: "1rem",
    paddingTop: "1rem",
    borderTop: "1px solid rgba(255, 255, 255, 0.06)",
  },
  pageBtn: {
    fontFamily: tokens.fontSans,
    padding: "0.5rem 1rem",
    fontSize: "1rem",
    background: tokens.surfaceHover,
    color: tokens.textSecondary,
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusMd,
    cursor: "pointer",
    transition: "all 0.2s",
  },
  pageInfo: {
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    color: tokens.textMuted,
  },
};

// =============================================================================
// Form/Input Styles
// =============================================================================

export const formStyles: StyleRecord = {
  form: {
    display: "flex",
    flexDirection: "column",
    gap: "1.25rem",
  },
  field: {
    display: "flex",
    flexDirection: "column",
    gap: "0.5rem",
  },
  label: {
    fontFamily: tokens.fontSans,
    color: tokens.textSecondary,
    fontSize: "0.875rem",
    fontWeight: 500,
  },
  input: {
    fontFamily: tokens.fontSans,
    padding: "0.875rem 1rem",
    fontSize: "1rem",
    background: tokens.inputBg,
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusLg,
    color: tokens.white,
    outline: "none",
    transition: "border-color 0.2s, box-shadow 0.2s",
  },
  inputError: {
    border: `1px solid ${tokens.errorBorder}`,
    boxShadow: `0 0 0 2px ${tokens.errorBg}`,
  },
  inputReadOnly: {
    background: "rgba(255, 255, 255, 0.02)",
    color: tokens.textMuted,
    cursor: "not-allowed",
  },
  textarea: {
    fontFamily: tokens.fontSans,
    width: "100%",
    padding: "0.75rem",
    background: tokens.inputBg,
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusMd,
    color: tokens.white,
    fontSize: "0.875rem",
    minHeight: "80px",
    resize: "vertical" as const,
  },
  select: {
    fontFamily: tokens.fontSans,
    fontSize: "0.9rem",
    padding: "0.75rem",
    background: tokens.inputBg,
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusMd,
    color: tokens.white,
    cursor: "pointer",
  },
  hint: {
    fontFamily: tokens.fontSans,
    fontSize: "0.75rem",
    color: tokens.textDim,
    fontStyle: "italic",
  },
  errorText: {
    fontFamily: tokens.fontSans,
    fontSize: "0.75rem",
    color: "#fca5a5",
  },
  error: {
    fontFamily: tokens.fontSans,
    fontSize: "0.75rem",
    color: "#fca5a5",
    marginTop: "0.25rem",
  },
  section: {
    marginBottom: "2rem",
  },
  sectionTitle: {
    fontFamily: tokens.fontSans,
    fontSize: "1rem",
    fontWeight: 600,
    color: tokens.textSecondary,
    marginBottom: "1.25rem",
    marginTop: 0,
  },
  actions: {
    display: "flex",
    justifyContent: "flex-end",
    marginTop: "2rem",
    paddingTop: "1.5rem",
    borderTop: `1px solid ${tokens.surfaceBorder}`,
  },
  charCount: {
    fontFamily: tokens.fontSans,
    fontSize: "0.75rem",
    color: tokens.textDim,
    textAlign: "right" as const,
    marginTop: "0.25rem",
  },
  charCountWarning: {
    color: tokens.error,
  },
};

// =============================================================================
// Button Styles
// =============================================================================

export const buttonStyles: StyleRecord = {
  /** Primary action button with gradient */
  primaryButton: {
    fontFamily: tokens.fontSans,
    padding: "1rem",
    fontSize: "1rem",
    fontWeight: 600,
    background: tokens.primaryGradient,
    color: tokens.white,
    border: "none",
    borderRadius: tokens.radiusLg,
    cursor: "pointer",
    transition: "transform 0.2s, box-shadow 0.2s",
    boxShadow: tokens.buttonShadow,
  },
  /** Secondary/cancel button */
  secondaryButton: {
    fontFamily: tokens.fontSans,
    fontSize: "0.85rem",
    padding: "0.6rem 1rem",
    background: tokens.surfaceHover,
    color: tokens.textSecondary,
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusMd,
    cursor: "pointer",
    transition: "all 0.2s",
  },
  /** Accent button (indigo tinted) */
  accentButton: {
    fontFamily: tokens.fontSans,
    fontSize: "0.9rem",
    fontWeight: 500,
    padding: "0.75rem 1.5rem",
    background: "rgba(99, 102, 241, 0.3)",
    color: tokens.white,
    border: "1px solid rgba(99, 102, 241, 0.5)",
    borderRadius: tokens.radiusMd,
    cursor: "pointer",
  },
  /** Danger/destructive button */
  dangerButton: {
    fontFamily: tokens.fontSans,
    fontSize: "0.75rem",
    padding: "0.4rem 0.75rem",
    background: tokens.errorBg,
    color: "rgba(239, 68, 68, 0.9)",
    border: `1px solid ${tokens.errorBorder}`,
    borderRadius: tokens.radiusSm,
    cursor: "pointer",
  },
  /** Disabled button modifier */
  buttonDisabled: {
    opacity: 0.5,
    cursor: "not-allowed",
    boxShadow: "none",
  },
  /** Primary button alias (for backwards compatibility) */
  primary: {
    fontFamily: tokens.fontSans,
    padding: "1rem",
    fontSize: "1rem",
    fontWeight: 600,
    background: tokens.primaryGradient,
    color: tokens.white,
    border: "none",
    borderRadius: tokens.radiusLg,
    cursor: "pointer",
    transition: "transform 0.2s, box-shadow 0.2s",
    boxShadow: tokens.buttonShadow,
  },
  /** Disabled button alias (for backwards compatibility) */
  disabled: {
    opacity: 0.5,
    cursor: "not-allowed",
    boxShadow: "none",
  },
};

// =============================================================================
// Badge/Status Styles
// =============================================================================

export const badgeStyles: StyleRecord = {
  /** Base badge style */
  badge: {
    fontFamily: tokens.fontSans,
    fontSize: "0.7rem",
    fontWeight: 500,
    padding: "0.25rem 0.5rem",
    borderRadius: "4px",
    textTransform: "uppercase",
    display: "inline-block",
  },
  /** Ready/primary status */
  badgeReady: {
    background: "rgba(99, 102, 241, 0.2)",
    color: tokens.accentIndigoMuted,
  },
  /** Success/spent status */
  badgeSuccess: {
    background: tokens.successBg,
    color: tokens.success,
  },
  /** Error/revoked status */
  badgeError: {
    background: "rgba(239, 68, 68, 0.2)",
    color: "rgba(239, 68, 68, 0.9)",
  },
  /** Booked/active status */
  badgeBooked: {
    background: "rgba(99, 102, 241, 0.15)",
    color: tokens.accentIndigoMuted,
  },
};

// =============================================================================
// Banner/Alert Styles
// =============================================================================

export const bannerStyles: StyleRecord = {
  errorBanner: {
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    padding: "1rem",
    background: tokens.errorBg,
    border: `1px solid ${tokens.errorBorder}`,
    borderRadius: tokens.radiusMd,
    color: tokens.error,
    marginBottom: "1rem",
  },
  successBanner: {
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    padding: "1rem",
    background: "rgba(34, 197, 94, 0.15)",
    border: `1px solid ${tokens.successBorder}`,
    borderRadius: tokens.radiusMd,
    color: "#4ade80",
    marginBottom: "1rem",
  },
  /** Success banner alias (for backwards compatibility) */
  success: {
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    padding: "1rem",
    background: "rgba(34, 197, 94, 0.15)",
    border: `1px solid ${tokens.successBorder}`,
    borderRadius: tokens.radiusMd,
    color: "#4ade80",
    marginBottom: "1rem",
  },
};

// =============================================================================
// Modal Styles
// =============================================================================

export const modalStyles: StyleRecord = {
  modalOverlay: {
    position: "fixed",
    top: 0,
    left: 0,
    right: 0,
    bottom: 0,
    background: "rgba(0, 0, 0, 0.7)",
    display: "flex",
    alignItems: "center",
    justifyContent: "center",
    zIndex: 1000,
  },
  modal: {
    background: "#1a1a3e",
    border: `1px solid ${tokens.inputBorder}`,
    borderRadius: tokens.radiusXl,
    padding: "2rem",
    width: "90%",
    maxWidth: "400px",
    boxShadow: tokens.cardShadow,
  },
  modalTitle: {
    fontFamily: tokens.fontSerif,
    fontSize: "1.5rem",
    fontWeight: 400,
    color: tokens.white,
    margin: "0 0 1.5rem 0",
  },
  modalError: {
    fontFamily: tokens.fontSans,
    fontSize: "0.85rem",
    padding: "0.75rem",
    background: tokens.errorBg,
    border: `1px solid ${tokens.errorBorder}`,
    borderRadius: tokens.radiusMd,
    color: tokens.error,
    marginBottom: "1rem",
  },
  modalActions: {
    display: "flex",
    justifyContent: "space-between",
    alignItems: "center",
    gap: "1rem",
  },
  modalActionsRight: {
    display: "flex",
    gap: "0.75rem",
  },
};

// =============================================================================
// Toast Styles
// =============================================================================

export const toastStyles: StyleRecord = {
  toast: {
    position: "fixed",
    top: "1.5rem",
    right: "1.5rem",
    padding: "1rem 1.5rem",
    borderRadius: tokens.radiusLg,
    fontFamily: tokens.fontSans,
    fontSize: "0.875rem",
    fontWeight: 500,
    zIndex: 1000,
    boxShadow: "0 10px 25px rgba(0, 0, 0, 0.3)",
  },
  toastSuccess: {
    background: "rgba(34, 197, 94, 0.9)",
    color: tokens.white,
  },
  toastError: {
    background: "rgba(239, 68, 68, 0.9)",
    color: tokens.white,
  },
};

// =============================================================================
// Trade Card Styles (shared between trades and admin/trades pages)
// =============================================================================

export const tradeCardStyles: StyleRecord = {
  /** Container for list of trade cards */
  tradeList: {
    display: "flex",
    flexDirection: "column",
    gap: "0.75rem",
  },
  /** Individual trade card */
  tradeCard: {
    background: tokens.surfaceBg,
    border: `1px solid ${tokens.surfaceBorder}`,
    borderRadius: tokens.radiusLg,
    padding: "1.25rem",
    transition: "all 0.2s",
  },
  /** Trade card header - flex row for info + actions */
  tradeHeader: {
    display: "flex",
    justifyContent: "space-between",
    alignItems: "flex-start",
    gap: "1rem",
  },
  /** Left side info container */
  tradeInfo: {
    display: "flex",
    flexDirection: "column",
    gap: "0.25rem",
  },
  /** Trade date/time display */
  tradeTime: {
    fontFamily: tokens.fontSans,
    fontSize: "1rem",
    fontWeight: 500,
    color: tokens.white,
    marginBottom: "0.5rem",
  },
  /** Trade amount details row */
  tradeDetails: {
    display: "flex",
    alignItems: "center",
    gap: "0.5rem",
    flexWrap: "wrap",
  },
  /** BUY/SELL direction badge (base - color applied inline) */
  directionBadge: {
    fontFamily: tokens.fontSans,
    fontSize: "0.7rem",
    fontWeight: 600,
    padding: "0.2rem 0.5rem",
    borderRadius: "4px",
    textTransform: "uppercase",
  },
  /** EUR amount display */
  amount: {
    fontFamily: tokens.fontMono,
    fontSize: "0.95rem",
    color: tokens.white,
    fontWeight: 500,
  },
  /** Arrow between EUR and sats */
  arrow: {
    color: tokens.textDisabled,
    fontSize: "0.8rem",
  },
  /** Sats amount in Bitcoin orange */
  satsAmount: {
    fontFamily: tokens.fontMono,
    fontSize: "0.9rem",
    color: "#f7931a", // Bitcoin orange
  },
  /** Rate info row */
  rateRow: {
    display: "flex",
    alignItems: "center",
    gap: "0.5rem",
    marginTop: "0.25rem",
    flexWrap: "wrap",
  },
  /** Rate label text */
  rateLabel: {
    fontFamily: tokens.fontSans,
    fontSize: "0.75rem",
    color: tokens.textDim,
  },
  /** Rate value in monospace */
  rateValue: {
    fontFamily: tokens.fontMono,
    fontSize: "0.8rem",
    color: tokens.textSecondary,
  },
  /** Button group container */
  buttonGroup: {
    display: "flex",
    gap: "0.5rem",
  },
  /** Empty state for no trades */
  emptyState: {
    fontFamily: tokens.fontSans,
    color: tokens.textDim,
    textAlign: "center" as const,
    padding: "3rem",
  },
};

// =============================================================================
// Misc Utility Styles
// =============================================================================

export const utilityStyles: StyleRecord = {
  /** Horizontal divider */
  divider: {
    height: "1px",
    background: tokens.surfaceBorder,
    margin: "0.75rem 0",
  },
  /** Empty state container */
  emptyState: {
    fontFamily: tokens.fontSans,
    color: tokens.textDim,
    textAlign: "center" as const,
    padding: "1rem 0",
  },
  /** Read-only badge for form labels */
  readOnlyBadge: {
    fontSize: "0.7rem",
    fontWeight: 500,
    color: tokens.textDim,
    background: tokens.surfaceBorder,
    padding: "0.15rem 0.5rem",
    borderRadius: "4px",
    textTransform: "uppercase",
    letterSpacing: "0.05em",
  },
  /** Flex row with gap */
  buttonRow: {
    display: "flex",
    gap: "0.75rem",
  },
  /** Filter group container */
  filterGroup: {
    display: "flex",
    alignItems: "center",
    gap: "1rem",
  },
};

// =============================================================================
// Combined sharedStyles (backwards compatible export)
// =============================================================================

/**
 * @deprecated Use individual style exports (layoutStyles, cardStyles, etc.) for better tree-shaking.
 * This combined export is maintained for backwards compatibility during migration.
 */
export const sharedStyles: StyleRecord = {
  // Layout
  main: layoutStyles.main,
  loader: layoutStyles.loader,
  content: layoutStyles.contentCentered,

  // Header
  header: headerStyles.header,
  nav: headerStyles.nav,
  navLink: headerStyles.navLink,
  navDivider: headerStyles.navDivider,
  navCurrent: headerStyles.navCurrent,
  userInfo: headerStyles.userInfo,
  userEmail: headerStyles.userEmail,
  logoutBtn: headerStyles.logoutBtn,

  // Common
  errorBanner: bannerStyles.errorBanner,
  cancelButton: buttonStyles.secondaryButton,
  emptyState: utilityStyles.emptyState,
};