using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using TUCAMAPI;

namespace TUCamera
{
    class TUCameraImageSave : TUCameraIFrameProcess
    {
        private bool m_isDeal = true;
        private event DoneHandler m_handler;
        private string m_eventId;

        private int m_timeLapse;
        private int m_count;

        private TimeSpan m_startTime;
        private int intervalTime = 0;
        private int m_duration = 0;
        private string m_savePath;
        private string m_imagePrefix;
        private List<string> m_imgList = new List<string>();
        private TUIMG_FORMATS m_imgFormat;
        private IntPtr m_hIdxTUCam;

        /// <summary>
        /// 拍摄固定张数图片
        /// </summary>
        /// <param name="savePath">文件保存路径</param>
        /// <param name="imagePrefix">文件名前缀</param>
        /// <param name="imageFormat">文件保存格式</param>
        /// <param name="timeLapse">时间间隔</param>
        /// <param name="count">拍摄次数</param>
        /// <param name="handler">完成委托</param>
        /// <param name="imgList">拍摄完成的图片List</param>
        public TUCameraImageSave(ref string eventId, ref DoneHandler handler, string savePath, string imagePrefix, TUIMG_FORMATS imageFormat, int timeLapse, int count, IntPtr hIdxTUCam)
        {
            eventId = System.Guid.NewGuid().ToString("N");
            m_savePath = savePath;
            m_imagePrefix = imagePrefix;
            m_imgFormat = imageFormat;
            m_timeLapse = timeLapse;
            m_count = count;
            m_handler = handler;
            m_hIdxTUCam = hIdxTUCam;
            m_eventId = eventId;
        }

        /// <summary>
        /// 最大速度持续一段时间拍摄
        /// </summary>
        /// <param name="savePath">文件保存路径</param>
        /// <param name="imagePrefix">文件名前缀</param>
        /// <param name="imageFormat">文件保存格式</param>
        /// <param name="duration">持续拍摄时间</param>
        /// <param name="handler">完成委托</param>
        /// <param name="imgList">拍摄完成的图片List</param>
        public TUCameraImageSave(ref string eventId, ref DoneHandler handler, string savePath, string imagePrefix, TUIMG_FORMATS imageFormat, int duration, IntPtr hIdxTUCam)
        {
            eventId = System.Guid.NewGuid().ToString("N");
            m_savePath = savePath;
            m_imagePrefix = imagePrefix;
            m_imgFormat = imageFormat;
            m_duration = duration;
            m_handler = handler;
            m_hIdxTUCam = hIdxTUCam;
            m_eventId = eventId;
        }

        public void doProcess(ref TUCAM_FRAME frame, bool pause)
        {
            if (!m_isDeal || pause)
            {
                return;
            }
            if (m_startTime == new TimeSpan(0))
            {
                m_startTime = new TimeSpan(DateTime.Now.Ticks);
            }

            // 拍摄固定张数图片
            if (m_duration == 0)
            {
                TimeSpan stopTime = new TimeSpan(DateTime.Now.Ticks);
                intervalTime = (int)m_startTime.Subtract(stopTime).Duration().TotalMilliseconds;
                if (intervalTime > m_timeLapse)
                {
                    m_startTime = stopTime;
                    saveImage(ref m_hIdxTUCam, ref frame);
                    if (m_count <= 0)
                    {
                        stop();
                    }
                }
            }
            else
            {
                // 持续一直拍摄
                if (m_duration < 0)
                {
                    saveImage(ref m_hIdxTUCam, ref frame);
                    return;
                }

                // 持续一段时间拍摄
                TimeSpan stopTime = new TimeSpan(DateTime.Now.Ticks);
                intervalTime = (int)m_startTime.Subtract(stopTime).Duration().TotalMilliseconds;
                if (intervalTime <= m_duration)
                {
                    saveImage(ref m_hIdxTUCam, ref frame);
                }
                else
                {
                    stop();
                }
            }

                
        }
        public bool isDeal()
        {
            return m_isDeal;
        }


        private void saveImage(ref IntPtr hIdxTUCam, ref TUCAM_FRAME frame)
        {
            DateTime now = DateTime.Now;
            string fileName = m_savePath + "\\" + m_imagePrefix + now.Year.ToString() + now.Month.ToString("D2") + now.Day.ToString("D2") + now.Hour.ToString("D2") + now.Minute.ToString("D2") + now.Second.ToString("D2") + now.Millisecond.ToString("D3");

            // 保存JPG格式 // Save other format data(TIFF/BMP/PNG/JPEG)
            int fileFormat = (int)(m_imgFormat);
            TUCAM_FILE_SAVE fileSave;
            fileSave.pstrSavePath = Marshal.StringToHGlobalAnsi(fileName);
            // struct to IntPtr
            fileSave.pFrame = Marshal.AllocHGlobal(Marshal.SizeOf(frame));
            Marshal.StructureToPtr(frame, fileSave.pFrame, true);
            fileSave.nSaveFmt = fileFormat;

            if (TUCAMRET.TUCAMRET_SUCCESS == TUCamAPI.TUCAM_File_SaveImage(hIdxTUCam, fileSave))
            {
                m_imgList.Add(creatImageName(fileName, m_imgFormat));
                if (m_count > 0)
                {
                    m_count--;
                }
            }
        }

        private string creatImageName(string fileName, TUIMG_FORMATS imageFormat)
        {
           // string fileName = fileName;
            switch (imageFormat)
            {
                case TUIMG_FORMATS.TUFMT_PNG:
                    fileName = fileName + ".png";
                    break;
                case TUIMG_FORMATS.TUFMT_BMP:
                    fileName = fileName + ".bmp";
                    break;
                case TUIMG_FORMATS.TUFMT_TIF:
                    fileName = fileName + ".tif";
                    break;
                default:
                    fileName = fileName + ".jpg";
                    break;
            }
            return fileName;
        }

        public string getEventId()
        {
            return m_eventId;
        }

        public void stop()
        {
            m_isDeal = false;
            m_handler(m_eventId, true, 0, "结束", m_imgList);
        }

    }
}