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

import '../../../constant/colors.dart';

/// ─────────────────────────────────────────────────────────────────────────
///  Route Planner — Design System
///
///  A single source of truth for the visual language of the ride-planning
///  surface. Inspired by best-in-class ride-hailing apps: calm neutrals,
///  a strong navy primary, and semantic colors for the route timeline
///  (origin = green, stops = amber/violet, destination = red).
///
///  This file is pure presentation. It never touches controllers.
/// ─────────────────────────────────────────────────────────────────────────
class RP {
  RP._();

  // ── Radii ──────────────────────────────────────────────────────────────
  static const double rSheet = 28;
  static const double rCard = 20;
  static const double rField = 16;
  static const double rChip = 14;
  static const double rPill = 999;

  // ── Motion ─────────────────────────────────────────────────────────────
  static const Duration fast = Duration(milliseconds: 180);
  static const Duration medium = Duration(milliseconds: 360);
  static const Curve ease = Curves.easeOutCubic;

  // ── Semantic route colors ──────────────────────────────────────────────
  static const Color origin = Color(0xFF16A34A); // green — pickup / start
  static const Color destination = Color(0xFFEF4444); // red — drop-off
  static const Color stop1 = Color(0xFFF59E0B); // amber — first stop
  static const Color stop2 = Color(0xFF7C3AED); // violet — second stop
  static Color get brand => AppColor.primaryColor;

  static Color stopColor(int index) => index == 0 ? stop1 : stop2;

  // ── Surfaces (theme-aware) ─────────────────────────────────────────────
  static bool get isDark => Get.isDarkMode;

  static Color get sheet =>
      isDark ? const Color(0xFF1C1D21) : const Color(0xFFFFFFFF);
  static Color get sheetElevated =>
      isDark ? const Color(0xFF26272C) : const Color(0xFFFFFFFF);
  static Color get fieldFill =>
      isDark ? const Color(0xFF2A2B31) : const Color(0xFFF4F5F7);
  static Color get chipFill =>
      isDark ? const Color(0xFF2A2B31) : const Color(0xFFF1F3F6);
  static Color get divider =>
      isDark ? const Color(0xFF33343A) : const Color(0xFFECEEF1);

  // ── Text ───────────────────────────────────────────────────────────────
  static Color get textStrong =>
      isDark ? const Color(0xFFF5F6F8) : const Color(0xFF10131A);
  static Color get textBody =>
      isDark ? const Color(0xFFC7CAD1) : const Color(0xFF3A3F4A);
  static Color get textMuted =>
      isDark ? const Color(0xFF8A8E98) : const Color(0xFF8B9099);

  // ── Elevation ──────────────────────────────────────────────────────────
  static List<BoxShadow> get sheetShadow => [
        BoxShadow(
          color: Colors.black.withValues(alpha: isDark ? 0.45 : 0.12),
          blurRadius: 40,
          spreadRadius: -6,
          offset: const Offset(0, -8),
        ),
        BoxShadow(
          color: Colors.black.withValues(alpha: isDark ? 0.30 : 0.06),
          blurRadius: 14,
          spreadRadius: -4,
          offset: const Offset(0, -2),
        ),
      ];

  static List<BoxShadow> get cardShadow => [
        BoxShadow(
          color: Colors.black.withValues(alpha: isDark ? 0.35 : 0.08),
          blurRadius: 24,
          spreadRadius: -8,
          offset: const Offset(0, 8),
        ),
      ];

  static List<BoxShadow> glow(Color c, {double intensity = 0.35}) => [
        BoxShadow(
          color: c.withValues(alpha: intensity),
          blurRadius: 16,
          spreadRadius: -2,
          offset: const Offset(0, 4),
        ),
      ];

  // ── Text styles ────────────────────────────────────────────────────────
  static TextStyle get title => TextStyle(
        fontSize: 18,
        fontWeight: FontWeight.w800,
        letterSpacing: -0.4,
        color: textStrong,
      );

  static TextStyle get sectionLabel => TextStyle(
        fontSize: 12.5,
        fontWeight: FontWeight.w700,
        letterSpacing: 0.4,
        color: textMuted,
      );

  static TextStyle get fieldValue => TextStyle(
        fontSize: 15,
        fontWeight: FontWeight.w700,
        color: textStrong,
      );

  static TextStyle get fieldHint => TextStyle(
        fontSize: 15,
        fontWeight: FontWeight.w600,
        color: textMuted,
      );

  static TextStyle get body => TextStyle(
        fontSize: 13.5,
        fontWeight: FontWeight.w500,
        color: textBody,
      );

  // ── Reusable pieces ────────────────────────────────────────────────────
  /// A short grabber handle used at the top of sheets.
  static Widget grabber() => Container(
        width: 42,
        height: 5,
        decoration: BoxDecoration(
          color: isDark ? Colors.white24 : Colors.black12,
          borderRadius: BorderRadius.circular(RP.rPill),
        ),
      );
}