using System.Threading.Tasks;
using System.Collections.Generic;
using NPP.SmartSchedue.Api.Contracts.Core.Enums;

namespace NPP.SmartSchedue.Api.Contracts.Services.Notification;

/// <summary>
/// 邮件通知服务接口
/// 决策点1：基础通知方式 - 邮件通知
/// </summary>
public interface IEmailNotificationService
{
    #region 单个邮件发送
    
    /// <summary>
    /// 发送邮件通知
    /// </summary>
    /// <param name="recipientEmail">接收人邮箱</param>
    /// <param name="subject">邮件主题</param>
    /// <param name="content">邮件内容</param>
    /// <param name="isHtml">是否HTML格式</param>
    /// <returns></returns>
    Task<bool> SendEmailAsync(string recipientEmail, string subject, string content, bool isHtml = true);

    /// <summary>
    /// 发送邮件通知（带附件）
    /// </summary>
    /// <param name="recipientEmail">接收人邮箱</param>
    /// <param name="subject">邮件主题</param>
    /// <param name="content">邮件内容</param>
    /// <param name="attachments">附件文件路径列表</param>
    /// <param name="isHtml">是否HTML格式</param>
    /// <returns></returns>
    Task<bool> SendEmailWithAttachmentsAsync(
        string recipientEmail, 
        string subject, 
        string content, 
        List<string> attachments, 
        bool isHtml = true);

    #endregion

    #region 批量邮件发送
    
    /// <summary>
    /// 批量发送邮件通知
    /// </summary>
    /// <param name="recipients">接收人邮箱列表</param>
    /// <param name="subject">邮件主题</param>
    /// <param name="content">邮件内容</param>
    /// <param name="isHtml">是否HTML格式</param>
    /// <returns>发送结果，Key为邮箱地址，Value为是否发送成功</returns>
    Task<Dictionary<string, bool>> BatchSendEmailAsync(
        List<string> recipients, 
        string subject, 
        string content, 
        bool isHtml = true);

    /// <summary>
    /// 个性化批量发送邮件通知
    /// 每个收件人可以有不同的邮件内容
    /// </summary>
    /// <param name="emailItems">邮件项列表</param>
    /// <returns>发送结果，Key为邮箱地址，Value为是否发送成功</returns>
    Task<Dictionary<string, bool>> BatchSendPersonalizedEmailAsync(List<EmailItem> emailItems);

    #endregion

    #region 邮件模板
    
    /// <summary>
    /// 使用模板发送邮件
    /// </summary>
    /// <param name="recipientEmail">接收人邮箱</param>
    /// <param name="subjectTemplate">邮件主题模板</param>
    /// <param name="contentTemplate">邮件内容模板</param>
    /// <param name="variables">模板变量</param>
    /// <param name="isHtml">是否HTML格式</param>
    /// <returns></returns>
    Task<bool> SendEmailByTemplateAsync(
        string recipientEmail,
        string subjectTemplate,
        string contentTemplate,
        Dictionary<string, string> variables,
        bool isHtml = true);

    #endregion

    #region 邮件发送状态检查
    
    /// <summary>
    /// 验证邮箱地址格式
    /// </summary>
    /// <param name="email">邮箱地址</param>
    /// <returns></returns>
    bool IsValidEmail(string email);

    /// <summary>
    /// 检查邮件服务器连接状态
    /// </summary>
    /// <returns></returns>
    Task<bool> CheckEmailServerConnectionAsync();

    #endregion
}

/// <summary>
/// 邮件项
/// </summary>
public class EmailItem
{
    /// <summary>
    /// 接收人邮箱
    /// </summary>
    public string RecipientEmail { get; set; } = "";

    /// <summary>
    /// 邮件主题
    /// </summary>
    public string Subject { get; set; } = "";

    /// <summary>
    /// 邮件内容
    /// </summary>
    public string Content { get; set; } = "";

    /// <summary>
    /// 是否HTML格式
    /// </summary>
    public bool IsHtml { get; set; } = true;

    /// <summary>
    /// 附件文件路径列表
    /// </summary>
    public List<string> Attachments { get; set; } = new List<string>();

    /// <summary>
    /// 个性化变量
    /// </summary>
    public Dictionary<string, string> Variables { get; set; } = new Dictionary<string, string>();
}