using YD_Event.Core.Entities;

namespace YD_Event.Core.Extensions;

/// <summary>
/// 项目时间处理扩展类
/// 用于统一处理 Project 实体的时间计算逻辑
/// </summary>
public static class ProjectTimeExtensions
{
    /// <summary>
    /// 获取项目的总时长（秒）
    /// </summary>
    /// <param name="project">项目实体</param>
    /// <returns>总时长（秒）</returns>
    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
    public static int GetTotalDurationInSeconds(this Project project)
    {
        if (project == null)
            throw new ArgumentNullException(nameof(project));

        // 边界情况处理：确保值不小于 0
        int minutes = Math.Max(0, project.DurationMinutes);
        int seconds = Math.Max(0, project.DurationSeconds);

        // 确保秒数不超过 59（一分钟内的秒数）
        seconds = Math.Min(seconds, 59);

        return minutes * 60 + seconds;
    }

    /// <summary>
    /// 设置项目的总时长（秒）
    /// 自动计算并更新 DurationMinutes 和 DurationSeconds
    /// </summary>
    /// <param name="project">项目实体</param>
    /// <param name="totalSeconds">总时长（秒）</param>
    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
    /// <exception cref="ArgumentOutOfRangeException">当 totalSeconds 小于 0 时抛出</exception>
    public static void SetTotalDurationInSeconds(this Project project, int totalSeconds)
    {
        if (project == null)
            throw new ArgumentNullException(nameof(project));

        if (totalSeconds < 0)
            throw new ArgumentOutOfRangeException(nameof(totalSeconds), "总时长不能小于 0");

        // 计算分钟和秒
        project.DurationMinutes = totalSeconds / 60;
        project.DurationSeconds = totalSeconds % 60;
    }

    /// <summary>
    /// 标准化项目的时间字段
    /// 确保 DurationSeconds 在 0-59 范围内，并正确处理负值
    /// </summary>
    /// <param name="project">项目实体</param>
    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
    public static void NormalizeDuration(this Project project)
    {
        if (project == null)
            throw new ArgumentNullException(nameof(project));

        // 先获取总秒数
        int totalSeconds = project.GetTotalDurationInSeconds();

        // 重新设置，确保标准化
        project.SetTotalDurationInSeconds(totalSeconds);
    }

    /// <summary>
    /// 获取格式化的时长显示字符串（例如："2分30秒" 或 "30秒"）
    /// </summary>
    /// <param name="project">项目实体</param>
    /// <returns>格式化的时长字符串</returns>
    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
    public static string GetFormattedDuration(this Project project)
    {
        if (project == null)
            throw new ArgumentNullException(nameof(project));

        int totalSeconds = project.GetTotalDurationInSeconds();
        int minutes = totalSeconds / 60;
        int seconds = totalSeconds % 60;

        if (minutes == 0)
        {
            return $"{seconds}秒";
        }
        else if (seconds == 0)
        {
            return $"{minutes}分";
        }
        else
        {
            return $"{minutes}分{seconds}秒";
        }
    }

    /// <summary>
    /// 获取符号格式的时长显示（例如："2'30\"" 或 "30\""）
    /// </summary>
    /// <param name="project">项目实体</param>
    /// <returns>符号格式的时长字符串</returns>
    /// <exception cref="ArgumentNullException">当 project 为 null 时抛出</exception>
    public static string GetSymbolFormattedDuration(this Project project)
    {
        if (project == null)
            throw new ArgumentNullException(nameof(project));

        int totalSeconds = project.GetTotalDurationInSeconds();
        int hours = totalSeconds / 3600;
        int remainingSeconds = totalSeconds % 3600;
        int minutes = remainingSeconds / 60;
        int seconds = remainingSeconds % 60;

        if (hours == 0)
        {
            if (seconds == 0)
            {
                return $"{minutes}'";
            }
            else
            {
                string paddedSeconds = seconds.ToString().PadLeft(2, '0');
                return $"{minutes}'{paddedSeconds}\"";
            }
        }
        else
        {
            string result = $"{hours}h";
            if (minutes > 0 || seconds > 0)
            {
                result += $"{minutes}'";
                if (seconds > 0)
                {
                    string paddedSeconds = seconds.ToString().PadLeft(2, '0');
                    result += $"{paddedSeconds}\"";
                }
            }
            return result;
        }
    }
}