import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:flutterflow_ui/flutterflow_ui.dart';
import 'package:vbvs_app/common/util/FitTool.dart';
import 'package:vbvs_app/common/util/MyUtils.dart';
import 'package:intl/intl.dart';

class SnoreChartContainer extends StatelessWidget {
  final List<dynamic> snoreValues;
  final List<dynamic> barData;
  final List<dynamic> showLabel;
  final int startTime;
  final int endTime;

  const SnoreChartContainer({
    required this.snoreValues,
    required this.barData,
    required this.showLabel,
    required this.startTime,
    required this.endTime,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    // barData.add({
    //   "type": 6,
    //   "et": 1765291778963,
    //   "st": 1765289341000,
    // });
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        SnoreBarOverlay(
          barData: barData,
          showLabel: showLabel,
          startTime: startTime,
          endTime: endTime,
        ),
        Container(height: 32.rpx),
        Container(
          height: 23.rpx,
          child: SnoreWaveform(
            snoreValues: snoreValues,
            startTime: startTime,
            endTime: endTime,
          ),
        ),
      ],
    );
  }
}

class SnoreBarOverlay extends StatelessWidget {
  final List<dynamic> barData;
  final List<dynamic> showLabel;
  final int startTime;
  final int endTime;

  const SnoreBarOverlay({
    required this.barData,
    required this.showLabel,
    required this.startTime,
    required this.endTime,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    const double barHeight = 50;
    return SizedBox(
      height: barHeight,
      child: CustomPaint(
        size: Size(double.infinity, barHeight),
        painter: SnoreBarPainter(
          barData: barData,
          showLabel: showLabel,
          startTime: startTime,
          endTime: endTime,
        ),
      ),
    );
  }
}

class SnoreBarPainter extends CustomPainter {
  final List<dynamic> barData;
  final List<dynamic> showLabel;
  final int startTime;
  final int endTime;

  SnoreBarPainter({
    required this.barData,
    required this.showLabel,
    required this.startTime,
    required this.endTime,
  });

  @override
  void paint(Canvas canvas, Size size) {
    final double width = size.width;
    final double height = size.height;
    final double pixelPerMs = width / (endTime - startTime);

    for (var item in barData) {
      final int st = item['st'];
      final int et = item['et'];
      final int type = item['type'];
      int heightInit = 1;

      final match = showLabel.firstWhere(
        (e) => e['type'] == type,
        orElse: () => null,
      );

      Color barColor = Colors.transparent;
      if (match != null) {
        final dynamic colorStr = match['color'];
        if (colorStr != null && colorStr.toString().isNotEmpty) {
          barColor = stringToColor(colorStr);
        }
      }

      final Paint barPaint = Paint()
        ..color = barColor
        ..style = PaintingStyle.fill;

      final double leftX = (st - startTime) * pixelPerMs;
      final double rightX = (et - startTime) * pixelPerMs;
      final double barWidth = rightX - leftX;

      //rem 深睡 中
      //浅睡 低
      //其他 高
      if (type == 1) {
        heightInit = 1;
      } else if (type == 2 || type == 6) {
        heightInit = 2;
      } else {
        heightInit = 3;
      }
      final double barHeight = (heightInit + 5).toDouble() * 8;
      final double top = height - barHeight;

      final rect = Rect.fromLTWH(leftX, top, barWidth, barHeight);
      canvas.drawRect(rect, barPaint);
    }
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => true;
}

class SnoreWaveform extends StatelessWidget {
  final List<dynamic> snoreValues;
  final int startTime;
  final int endTime;

  const SnoreWaveform({
    required this.snoreValues,
    required this.startTime,
    required this.endTime,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: 150,
      child: CustomPaint(
        size: Size(double.infinity, 150),
        painter: SnoreWaveformPainter(
          snoreValues: snoreValues,
          startTime: startTime,
          endTime: endTime,
        ),
      ),
    );
  }
}

class SnoreWaveformPainter extends CustomPainter {
  final List<dynamic> snoreValues;
  final int startTime;
  final int endTime;

  SnoreWaveformPainter({
    required this.snoreValues,
    required this.startTime,
    required this.endTime,
  });

  @override
  void paint(Canvas canvas, Size size) {
    final double width = size.width;
    final double height = size.height;
    final double centerY = height / 2;
    final double totalDuration = (endTime - startTime).toDouble();
    final double pixelPerMs = width / totalDuration;

    final Paint wavePaint = Paint()
      ..color = stringToColor("#8E7DEF").withOpacity(0.8)
      ..strokeWidth = 1.5
      ..style = PaintingStyle.stroke;

    final Path upperPath = Path();
    final Path lowerPath = Path();

    double maxValue = snoreValues.fold<double>(0, (prev, e) {
      final value = e["value"]?.toDouble() ?? 0;
      return value > prev ? value : prev;
    });

    final double maxWaveHeight = height * 1;
    final double scaleY = maxValue > 0 ? (maxWaveHeight / maxValue) : 1;

    for (int i = 0; i < snoreValues.length; i++) {
      final timestamp = snoreValues[i]["st"];
      final value = snoreValues[i]["value"]?.toDouble() ?? 0;

      final x = (timestamp - startTime) * pixelPerMs;
      final y = centerY - value * scaleY;
      final yMirror = centerY + value * scaleY;

      if (i == 0) {
        upperPath.moveTo(x, y);
        lowerPath.moveTo(x, yMirror);
      } else {
        upperPath.lineTo(x, y);
        lowerPath.lineTo(x, yMirror);
      }
    }

    canvas.drawPath(upperPath, wavePaint);
    canvas.drawPath(lowerPath, wavePaint);

    final Paint axisPaint = Paint()
      ..color = Colors.grey.withOpacity(0.6)
      ..strokeWidth = 0.5;
    canvas.drawLine(Offset(0, centerY), Offset(width, centerY), axisPaint);

    final textPainter = TextPainter(
      textAlign: TextAlign.center,
      textDirection: ui.TextDirection.ltr,
    );

    final int hourMs = 60 * 60 * 1000;
    final int totalHours = (endTime - startTime) ~/ hourMs;

    // 1. 始终显示开始时间
    double x = 0;
    DateTime startDt = DateTime.fromMillisecondsSinceEpoch(startTime);
    String label = DateFormat('HH:mm').format(startDt);

    textPainter.text = TextSpan(
      text: label,
      style: TextStyle(fontSize: 10, color: Colors.grey),
    );
    textPainter.layout();
    textPainter.paint(
      canvas,
      Offset(x - textPainter.width / 2, height + 2),
    );

    // 2. 决定显示策略
    if (totalHours <= 8) {
      // 小时间段：显示所有整点小时
      for (int t = startTime + hourMs; t < endTime; t += hourMs) {
        x = (t - startTime) * pixelPerMs;
        DateTime dt = DateTime.fromMillisecondsSinceEpoch(t);

        // 判断是否接近边界（30分钟内不显示）
        if (t - startTime < 30 * 60 * 1000 || endTime - t < 30 * 60 * 1000) {
          continue;
        }

        label = dt.hour == 0 ? "0" : "${dt.hour}";

        textPainter.text = TextSpan(
          text: label,
          style: TextStyle(fontSize: 10, color: Colors.grey),
        );
        textPainter.layout();
        textPainter.paint(
          canvas,
          Offset(x - textPainter.width / 2, height + 2),
        );
      }
    } else {
      // 长时间段：使用自适应间隔
      int labelInterval = (totalHours / 6).ceil();

      // 计算第一个标签位置（对齐整点）
      int firstLabelMs =
          ((startTime ~/ (labelInterval * hourMs))) * labelInterval * hourMs;
      if (firstLabelMs <= startTime) {
        firstLabelMs += labelInterval * hourMs;
      }

      // 绘制中间标签
      for (int t = firstLabelMs; t < endTime; t += labelInterval * hourMs) {
        // 跳过太接近边界的时间点（1小时内不显示）
        if (t - startTime < hourMs || endTime - t < hourMs) continue;

        x = (t - startTime) * pixelPerMs;
        DateTime dt = DateTime.fromMillisecondsSinceEpoch(t);
        label = dt.hour == 0 ? "0" : "${dt.hour}";

        textPainter.text = TextSpan(
          text: label,
          style: TextStyle(fontSize: 10, color: Colors.grey),
        );
        textPainter.layout();
        textPainter.paint(
          canvas,
          Offset(x - textPainter.width / 2, height + 2),
        );
      }
    }

    // 3. 始终显示结束时间
    x = (endTime - startTime) * pixelPerMs;
    DateTime endDt = DateTime.fromMillisecondsSinceEpoch(endTime);
    label = DateFormat('HH:mm').format(endDt);

    textPainter.text = TextSpan(
      text: label,
      style: TextStyle(fontSize: 10, color: Colors.grey),
    );
    textPainter.layout();
    textPainter.paint(
      canvas,
      Offset(x - textPainter.width / 2, height + 2),
    );
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => true;
}