import 'dart:ui';

import 'package:flutter/material.dart';

import '../../app/theme.dart';

/// A blurred surface for stable application chrome only.
///
/// Keep this out of scrollable content. Diagnostic rows and metric panels use
/// [InstrumentPanel], which has the same visual language without creating a
/// compositing layer per item.
class FrostedChrome extends StatelessWidget {
  const FrostedChrome({
    required this.child,
    super.key,
    this.borderRadius = BorderRadius.zero,
  });

  final Widget child;
  final BorderRadius borderRadius;

  @override
  Widget build(BuildContext context) {
    final highContrast = MediaQuery.maybeOf(context)?.highContrast ?? false;
    final surface = _SurfaceFrame(
      borderRadius: borderRadius,
      chrome: true,
      opaque: highContrast,
      child: child,
    );
    if (highContrast) {
      return surface;
    }

    return ClipRRect(
      borderRadius: borderRadius,
      child: BackdropFilter(
        filter: ImageFilter.blur(sigmaX: 20, sigmaY: 20),
        child: surface,
      ),
    );
  }
}

/// An opaque, high-legibility panel for operational data and event rows.
class InstrumentPanel extends StatelessWidget {
  const InstrumentPanel({
    required this.child,
    super.key,
    this.borderRadius = const BorderRadius.all(Radius.circular(12)),
    this.accent,
  });

  final Widget child;
  final BorderRadius borderRadius;
  final Color? accent;

  @override
  Widget build(BuildContext context) => _SurfaceFrame(
    borderRadius: borderRadius,
    accent: accent,
    opaque: true,
    child: child,
  );
}

class _SurfaceFrame extends StatelessWidget {
  const _SurfaceFrame({
    required this.child,
    required this.borderRadius,
    this.chrome = false,
    this.opaque = false,
    this.accent,
  });

  final Widget child;
  final BorderRadius borderRadius;
  final bool chrome;
  final bool opaque;
  final Color? accent;

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final dark = scheme.brightness == Brightness.dark;
    final opacity = opaque ? 0xf6 : (dark ? 0xbf : 0xd9);
    final top = dark
        ? Color.fromARGB(
            opacity,
            chrome ? 12 : 16,
            chrome ? 17 : 23,
            chrome ? 14 : 18,
          )
        : Color.fromARGB(opacity, 255, 255, 255);
    final bottom = dark
        ? Color.fromARGB(opacity, 8, 11, 9)
        : Color.fromARGB(opacity, 244, 248, 244);
    final border =
        accent?.withValues(alpha: 0.74) ??
        scheme.outline.withValues(alpha: dark ? 0.92 : 0.82);

    return DecoratedBox(
      decoration: BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topLeft,
          end: Alignment.bottomRight,
          colors: [top, bottom],
        ),
        border: Border.all(color: border),
        borderRadius: borderRadius,
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: dark ? 0.18 : 0.06),
            blurRadius: 18,
            offset: const Offset(0, 8),
          ),
        ],
      ),
      child: child,
    );
  }
}

/// The static canvas behind Ground Suite's chrome and instrument surfaces.
class AppCanvas extends StatelessWidget {
  const AppCanvas({required this.child, super.key});

  final Widget child;

  @override
  Widget build(BuildContext context) {
    final dark = Theme.of(context).brightness == Brightness.dark;
    final base = dark ? const Color(0xff080b09) : const Color(0xfff3f6f3);
    final primaryHaze = (dark ? accentGreen : const Color(0xff087a3b))
        .withValues(alpha: dark ? 0.075 : 0.05);

    return ColoredBox(
      color: base,
      child: Stack(
        children: [
          Positioned(
            top: -250,
            right: -200,
            child: IgnorePointer(child: _Haze(color: primaryHaze)),
          ),
          Positioned(
            bottom: -330,
            left: -260,
            child: IgnorePointer(
              child: _Haze(color: primaryHaze.withValues(alpha: 0.55)),
            ),
          ),
          Positioned.fill(child: child),
        ],
      ),
    );
  }
}

class _Haze extends StatelessWidget {
  const _Haze({required this.color});

  final Color color;

  @override
  Widget build(BuildContext context) => Container(
    width: 600,
    height: 600,
    decoration: BoxDecoration(
      shape: BoxShape.circle,
      gradient: RadialGradient(colors: [color, Colors.transparent]),
    ),
  );
}

class ConsoleLabel extends StatelessWidget {
  const ConsoleLabel(this.text, {super.key, this.color});

  final String text;
  final Color? color;

  @override
  Widget build(BuildContext context) => Text(
    text.toUpperCase(),
    style: Theme.of(context).textTheme.labelSmall?.copyWith(
      color: color ?? Theme.of(context).colorScheme.onSurfaceVariant,
      fontFamily: 'monospace',
      fontWeight: FontWeight.w700,
      letterSpacing: 1.25,
    ),
  );
}

class StatusBadge extends StatelessWidget {
  const StatusBadge({required this.label, super.key, this.color});

  final String label;
  final Color? color;

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final tone = color ?? scheme.onSurfaceVariant;
    return DecoratedBox(
      decoration: BoxDecoration(
        color: tone.withValues(alpha: 0.11),
        border: Border.all(color: tone.withValues(alpha: 0.45)),
        borderRadius: BorderRadius.circular(7),
      ),
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 5),
        child: ConsoleLabel(label, color: tone),
      ),
    );
  }
}