import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';

/// Tokens de marque ETM PowerSync — source de vérité unique.
class EtmTokens {
  EtmTokens._();

  // ── Couleurs de marque (spec Dashboard v4) ────────────────────────────────
  static const Color brand       = Color(0xFF31A3DD);
  static const Color solar       = Color(0xFFFEC113);
  static const Color solarDark   = Color(0xFFFFCB33);
  static const Color eco         = Color(0xFF28A06A);
  static const Color ecoDark     = Color(0xFF33B87A);
  static const Color heat        = Color(0xFFEF8B2A);
  static const Color water       = Color(0xFF31A3DD);
  static const Color gridColor   = Color(0xFF8A98A3);
  static const Color importColor = Color(0xFFE8806F);

  // ── Legacy (compatibilité existante) ─────────────────────────────────────
  static const Color navy     = Color(0xFF0D2B3B);
  static const Color navy2    = Color(0xFF10384C);
  static const Color blue     = Color(0xFF31A3DD);
  static const Color amber    = Color(0xFFFEC113);
  static const Color green    = Color(0xFF1DB86A);
  static const Color greenDark= Color(0xFF159C58);
  static const Color orange   = Color(0xFFE8923A);
  static const Color danger   = Color(0xFFE8423F);

  // ── Couleurs de flux ──────────────────────────────────────────────────────
  static const Color solToHouse  = Color(0xFFB8C34D);
  static const Color solToEcs    = Color(0xFF31A3DD);
  static const Color solToVe     = Color(0xFF28A06A);
  static const Color solToBatt   = Color(0xFF7FCF72);
  static const Color solToGrid   = Color(0xFFFEC113);
  static const Color battToHouse = Color(0xFF2F6FB0);
  static const Color gridToHouse = Color(0xFFE8806F);

  // ── Neutres light ─────────────────────────────────────────────────────────
  static const Color ink  = navy;
  static const Color muted= Color(0xFF5D6F7B);
  static const Color faint= Color(0xFF8B9AA4);
  static const Color line = Color(0xFFE4EAEE);
  static const Color bg   = Color(0xFFEEF2F5);
  static const Color bg2  = Color(0xFFE4EAEE);
  static const Color card = Color(0xFFFFFFFF);

  // ── Neutres dark ──────────────────────────────────────────────────────────
  static const Color bgDark      = Color(0xFF06141D);
  static const Color bg2Dark     = Color(0xFF0A1F2B);
  static const Color surfaceDark = Color(0xFF0D2B3B);
  static const Color inkDark     = Color(0xFFEAF3F7);
  static const Color mutedDark   = Color(0xFF9BB0BC);
  static const Color faintDark   = Color(0xFF6C8493);

  // ── Soft fills (legacy light) ─────────────────────────────────────────────
  static const Color greenSoft = Color(0xFFE7F8EF);
  static const Color blueSoft  = Color(0xFFE9F5FB);
  static const Color amberSoft = Color(0xFFFFF6DD);

  // ── Rayons ────────────────────────────────────────────────────────────────
  static const double radius     = 16;
  static const double radiusLg   = 22;
  static const double radiusCard = 20;
  static const double radiusCtrl = 13;
  static const double radiusPill = 30;

  // ── Context-aware ─────────────────────────────────────────────────────────
  static bool _isDark(BuildContext c) =>
      Theme.of(c).brightness == Brightness.dark;

  static Color bgOf(BuildContext c)      => _isDark(c) ? bgDark      : bg;
  static Color bg2Of(BuildContext c)     => _isDark(c) ? bg2Dark     : bg2;
  static Color surfaceOf(BuildContext c) => _isDark(c) ? surfaceDark : card;
  static Color inkOf(BuildContext c)     => _isDark(c) ? inkDark     : ink;
  static Color mutedOf(BuildContext c)   => _isDark(c) ? mutedDark   : muted;
  static Color faintOf(BuildContext c)   => _isDark(c) ? faintDark   : faint;
  static Color ecoOf(BuildContext c)     => _isDark(c) ? ecoDark     : eco;
  static Color solarOf(BuildContext c)   => _isDark(c) ? solarDark   : solar;

  static Color lineOf(BuildContext c) => _isDark(c)
      ? const Color(0xFFFFFFFF).withValues(alpha: 0.09)
      : navy.withValues(alpha: 0.10);

  static Color lineStrongOf(BuildContext c) => _isDark(c)
      ? const Color(0xFFFFFFFF).withValues(alpha: 0.16)
      : navy.withValues(alpha: 0.16);

  // ── Typographie ───────────────────────────────────────────────────────────
  static TextStyle sans({
    double size = 14,
    FontWeight weight = FontWeight.w400,
    Color color = ink,
    double? height,
    double? letterSpacing,
  }) =>
      GoogleFonts.ibmPlexSans(
        fontSize: size,
        fontWeight: weight,
        color: color,
        height: height,
        letterSpacing: letterSpacing,
      );

  static TextStyle mono({
    double size = 14,
    FontWeight weight = FontWeight.w600,
    Color color = ink,
  }) =>
      GoogleFonts.ibmPlexMono(
        fontSize: size,
        fontWeight: weight,
        color: color,
        fontFeatures: const [FontFeature.tabularFigures()],
      );

  static TextStyle sectionLabel() => sans(
        size: 12,
        weight: FontWeight.w600,
        color: faint,
        letterSpacing: 1.2,
      );

  // ── Ombres ────────────────────────────────────────────────────────────────
  static List<BoxShadow> get cardShadow => [
        BoxShadow(
          color: navy.withValues(alpha: 0.04),
          blurRadius: 2,
          offset: const Offset(0, 1),
        ),
        BoxShadow(
          color: navy.withValues(alpha: 0.06),
          blurRadius: 30,
          offset: const Offset(0, 10),
        ),
      ];

  static List<BoxShadow> cardShadowOf(BuildContext c) => _isDark(c)
      ? []
      : cardShadow;
}