using System;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using TabletTester2025.Models;

namespace TabletTester2025
{
    public partial class SettingsWindow : Window
    {
        public SettingsWindow()
        {
            InitializeComponent();
            LoadSettings();
        }

        private void LoadSettings()
        {
            var p = App.CurrentPharmaParams;
            HardnessMinBox.Text = p.HardnessMin_N.ToString();
            HardnessMaxBox.Text = p.HardnessMax_N.ToString();
            HardnessCountBox.Text = p.HardnessTestCount.ToString();
            FriabilityRpmBox.Text = p.FriabilityTargetRpm.ToString();
            FriabilityTimeBox.Text = ResolveFriabilityTargetTimeMin(p).ToString("0.###");
            FriabilityRoundsBox.Text = CalculateFriabilityRounds(
                ResolveFriabilityTargetTimeMin(p),
                p.FriabilityTargetRpm > 0 ? p.FriabilityTargetRpm : 25).ToString();
            FriabilityMaxLossBox.Text = p.FriabilityMaxLossPercent.ToString();
            SelectDisintegrationDosageForm(p.DisintegrationDosageForm);
            DisintegrationMaxSecBox.Text = p.DisintegrationMaxSeconds.ToString();
            DisintegrationSpeedBox.Text = p.DisintegrationSpeedRpm.ToString();
            DisintegrationTempBox.Text = p.DisintegrationTemperatureC.ToString();
            DissolutionMinPercentBox.Text = p.DissolutionMinPercentAt30min.ToString();
            DissolutionTempBox.Text = p.DissolutionTemperatureC.ToString();
            Dissolution1TimeBox.Text = p.Dissolution1TimeMin.ToString();
            Dissolution2TimeBox.Text = p.Dissolution2TimeMin.ToString();
            Dissolution1IntervalBox.Text = p.Dissolution1SampleIntervalMin.ToString();
            Dissolution2IntervalBox.Text = p.Dissolution2SampleIntervalMin.ToString();
            SampleTimesBox.Text = string.Join(",", p.DissolutionSampleTimes);
        }

        private void SaveButton_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var p = App.CurrentPharmaParams;
                p.HardnessMin_N = double.Parse(HardnessMinBox.Text);
                p.HardnessMax_N = double.Parse(HardnessMaxBox.Text);
                p.HardnessTestCount = int.Parse(HardnessCountBox.Text);
                p.FriabilityTargetRpm = double.Parse(FriabilityRpmBox.Text);
                p.FriabilityTargetTimeMin = double.Parse(FriabilityTimeBox.Text);
                p.FriabilityTargetRounds = CalculateFriabilityRounds(p.FriabilityTargetTimeMin, p.FriabilityTargetRpm);
                p.FriabilityMaxLossPercent = double.Parse(FriabilityMaxLossBox.Text);
                p.DisintegrationDosageForm = GetSelectedDisintegrationDosageForm();
                p.DisintegrationMaxSeconds = int.Parse(DisintegrationMaxSecBox.Text);
                p.DisintegrationSpeedRpm = double.Parse(DisintegrationSpeedBox.Text);
                p.DisintegrationTemperatureC = double.Parse(DisintegrationTempBox.Text);
                p.DissolutionMinPercentAt30min = double.Parse(DissolutionMinPercentBox.Text);
                p.DissolutionTemperatureC = double.Parse(DissolutionTempBox.Text);
                p.Dissolution1TimeMin = int.Parse(Dissolution1TimeBox.Text);
                p.Dissolution2TimeMin = int.Parse(Dissolution2TimeBox.Text);
                p.Dissolution1SampleIntervalMin = double.Parse(Dissolution1IntervalBox.Text);
                p.Dissolution2SampleIntervalMin = double.Parse(Dissolution2IntervalBox.Text);
                p.DissolutionSampleTimes = SampleTimesBox.Text
                    .Split(',', StringSplitOptions.RemoveEmptyEntries)
                    .Select(s => int.Parse(s.Trim()))
                    .ToArray();

                ValidateParameters(p);
                App.SaveCurrentPharmaParameters();

                MessageBox.Show("参数已保存并立即生效", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
                DialogResult = true;
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show($"输入格式错误: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        private void CancelButton_Click(object sender, RoutedEventArgs e)
        {
            DialogResult = false;
            Close();
        }

        private void DisintegrationDosageFormBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (DisintegrationDosageFormBox.SelectedItem is ComboBoxItem item && item.Tag is string seconds)
                DisintegrationMaxSecBox.Text = seconds;
        }

        private void FriabilityCalculationBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (FriabilityRoundsBox == null)
                return;

            if (int.TryParse(FriabilityTimeBox?.Text, out int timeMin)
                && int.TryParse(FriabilityRpmBox?.Text, out int rpm)
                && timeMin > 0
                && rpm > 0)
            {
                FriabilityRoundsBox.Text = CalculateFriabilityRounds(timeMin, rpm).ToString();
            }
            else
            {
                FriabilityRoundsBox.Text = "";
            }
        }

        private void SelectDisintegrationDosageForm(string dosageForm)
        {
            foreach (ComboBoxItem item in DisintegrationDosageFormBox.Items)
            {
                if (string.Equals(item.Content?.ToString(), dosageForm, StringComparison.OrdinalIgnoreCase))
                {
                    DisintegrationDosageFormBox.SelectedItem = item;
                    return;
                }
            }

            DisintegrationDosageFormBox.SelectedIndex = 0;
        }

        private string GetSelectedDisintegrationDosageForm()
        {
            return DisintegrationDosageFormBox.SelectedItem is ComboBoxItem item
                ? item.Content?.ToString() ?? "普通片"
                : "普通片";
        }

        private static void ValidateParameters(PharmaParameters p)
        {
            if (p.HardnessMin_N < 0 || p.HardnessMax_N <= p.HardnessMin_N)
                throw new InvalidOperationException("硬度内控上限必须大于下限。");
            if (p.HardnessTestCount <= 0)
                throw new InvalidOperationException("硬度测试次数必须大于0。");
            if (p.FriabilityTargetRpm <= 0 || p.FriabilityTargetTimeMin <= 0 || p.FriabilityTargetRounds <= 0 || p.FriabilityMaxLossPercent <= 0)
                throw new InvalidOperationException("脆碎度参数必须大于0。");
            if (p.DisintegrationMaxSeconds <= 0 || p.DisintegrationSpeedRpm <= 0 || p.DisintegrationTemperatureC <= 0)
                throw new InvalidOperationException("崩解参数必须大于0。");
            if (p.DissolutionMinPercentAt30min < 0 || p.DissolutionMinPercentAt30min > 150)
                throw new InvalidOperationException("溶出度Q值应在0到150之间。");
            if (p.DissolutionTemperatureC <= 0 || p.Dissolution1TimeMin <= 0 || p.Dissolution2TimeMin <= 0)
                throw new InvalidOperationException("溶出温度和运行时间必须大于0。");
            if (p.Dissolution1SampleIntervalMin <= 0 || p.Dissolution2SampleIntervalMin <= 0)
                throw new InvalidOperationException("溶出取样间隔必须大于0。");
            if (p.DissolutionSampleTimes == null || p.DissolutionSampleTimes.Length == 0 || p.DissolutionSampleTimes.Any(t => t <= 0))
                throw new InvalidOperationException("溶出取样时间点必须为大于0的分钟数。");
        }

        private static double ResolveFriabilityTargetTimeMin(PharmaParameters p)
        {
            if (p.FriabilityTargetTimeMin > 0)
                return p.FriabilityTargetTimeMin;

            double rpm = p.FriabilityTargetRpm > 0 ? p.FriabilityTargetRpm : 25;
            if (p.FriabilityTargetRounds > 0 && rpm > 0)
                return p.FriabilityTargetRounds / rpm;

            return 4.0;
        }

        private static int CalculateFriabilityRounds(double timeMin, double rpm)
        {
            if (timeMin <= 0 || rpm <= 0)
                return 0;

            return Math.Max(1, (int)Math.Round(timeMin * rpm, MidpointRounding.AwayFromZero));
        }
    }
}