namespace WebApi.Controllers.EmailMessage;

[ApiController]
[Route("api/[controller]/[action]")]
public class EmailMessageController(
    IEmailMessageRepository emailRepository,
    ITransactionRecordRepository transactionRepository,
    ILogger<EmailMessageController> logger,
    IEmailHandleService emailHandleService,
    IEmailBackgroundService emailBackgroundService
) : ControllerBase
{
    /// <summary>
    /// 获取邮件列表（分页）
    /// </summary>
    [HttpGet]
    public async Task<PagedResponse<EmailMessageDto>> GetListAsync(
        [FromQuery] DateTime? lastReceivedDate = null,
        [FromQuery] long? lastId = null
    )
    {
        try
        {
            var (list, lastTime, lastIdResult) = await emailRepository.GetPagedListAsync(lastReceivedDate, lastId);
            var total = await emailRepository.GetTotalCountAsync();

            // 为每个邮件获取账单数量
            var emailDtos = new List<EmailMessageDto>();
            foreach (var email in list)
            {
                var transactionCount = await transactionRepository.GetCountByEmailIdAsync(email.Id);
                emailDtos.Add(EmailMessageDto.FromEntity(email, transactionCount));
            }

            return new PagedResponse<EmailMessageDto>
            {
                Success = true,
                Data = emailDtos.ToArray(),
                Total = (int)total,
                LastId = lastIdResult,
                LastTime = lastTime
            };
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "获取邮件列表失败，时间: {LastTime}, ID: {LastId}", lastReceivedDate, lastId);
            return PagedResponse<EmailMessageDto>.Fail($"获取邮件列表失败: {ex.Message}");
        }
    }

    /// <summary>
    /// 根据ID获取邮件详情
    /// </summary>
    [HttpGet("{id}")]
    public async Task<BaseResponse<EmailMessageDto>> GetByIdAsync(long id)
    {
        try
        {
            var email = await emailRepository.GetByIdAsync(id);
            if (email == null)
            {
                return BaseResponse<EmailMessageDto>.Fail("邮件不存在");
            }

            // 获取账单数量
            var transactionCount = await transactionRepository.GetCountByEmailIdAsync(id);
            var emailDto = EmailMessageDto.FromEntity(email, transactionCount);

            return new BaseResponse<EmailMessageDto>
            {
                Success = true,
                Data = emailDto
            };
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "获取邮件详情失败，邮件ID: {EmailId}", id);
            return BaseResponse<EmailMessageDto>.Fail($"获取邮件详情失败: {ex.Message}");
        }
    }

    public async Task<BaseResponse> DeleteByIdAsync(long id)
    {
        try
        {
            var success = await emailRepository.DeleteAsync(id);
            if (success)
            {
                return new BaseResponse
                {
                    Success = true
                };
            }
            else
            {
                return BaseResponse.Fail("删除邮件失败，邮件不存在");
            }
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "删除邮件失败，邮件ID: {EmailId}", id);
            return BaseResponse.Fail($"删除邮件失败: {ex.Message}");
        }
    }

    /// <summary>
    /// 重新分析邮件并刷新交易记录
    /// </summary>
    [HttpPost]
    public async Task<BaseResponse> RefreshTransactionRecordsAsync([FromQuery] long id)
    {
        try
        {
            var email = await emailRepository.GetByIdAsync(id);
            if (email == null)
            {
                return BaseResponse.Fail("邮件不存在");
            }

            var success = await emailHandleService.RefreshTransactionRecordsAsync(id);
            if (success)
            {
                return new BaseResponse
                {
                    Success = true
                };
            }
            else
            {
                return BaseResponse.Fail("重新分析失败");
            }
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "重新分析邮件失败，邮件ID: {EmailId}", id);
            return BaseResponse.Fail($"重新分析失败: {ex.Message}");
        }
    }

    /// <summary>
    /// 立即同步邮件
    /// </summary>
    [HttpPost]
    public async Task<BaseResponse> SyncEmailsAsync()
    {
        try
        {
            await emailBackgroundService.SyncEmailsAsync();
            return new BaseResponse
            {
                Success = true,
                Message = "同步成功"
            };
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "同步邮件失败");
            return BaseResponse.Fail($"同步邮件失败: {ex.Message}");
        }
    }

    /// <summary>
    /// 标记邮件为已读
    /// </summary>
    [HttpPost]
    public async Task<BaseResponse> MarkAsReadAsync([FromQuery] long id)
    {
        try
        {
            var email = await emailRepository.GetByIdAsync(id);
            if (email == null)
            {
                return BaseResponse.Fail("邮件不存在");
            }

            email.IsRead = true;
            email.UpdateTime = DateTime.Now;
            var success = await emailRepository.UpdateAsync(email);
            
            if (success)
            {
                return new BaseResponse
                {
                    Success = true
                };
            }
            else
            {
                return BaseResponse.Fail("标记失败");
            }
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "标记邮件为已读失败，邮件ID: {EmailId}", id);
            return BaseResponse.Fail($"标记失败: {ex.Message}");
        }
    }

    /// <summary>
    /// 将所有邮件标记为已读
    /// </summary>
    [HttpPost]
    public async Task<BaseResponse> MarkAllAsReadAsync()
    {
        try
        {
            var emails = await emailRepository.GetAllAsync();
            var unreadEmails = emails.Where(e => !e.IsRead).ToList();
            
            if (unreadEmails.Count == 0)
            {
                return new BaseResponse
                {
                    Success = true,
                    Message = "没有未读邮件"
                };
            }

            foreach (var email in unreadEmails)
            {
                email.IsRead = true;
                email.UpdateTime = DateTime.Now;
            }

            var success = await emailRepository.UpdateRangeAsync(unreadEmails);
            
            if (success)
            {
                return new BaseResponse
                {
                    Success = true,
                    Message = $"已将 {unreadEmails.Count} 封邮件标记为已读"
                };
            }
            else
            {
                return BaseResponse.Fail("标记失败");
            }
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "将所有邮件标记为已读失败");
            return BaseResponse.Fail($"标记失败: {ex.Message}");
        }
    }
}