package clipboard

import (
	"b612.me/win32api"
	"fmt"
	"runtime"
)

var winformat = map[win32api.DWORD]string{
	1:      "CF_TEXT",
	2:      "CF_BITMAP",
	3:      "CF_METAFILEPICT",
	4:      "CF_SYLK",
	5:      "CF_DIF",
	6:      "CF_TIFF",
	7:      "CF_OEMTEXT",
	8:      "CF_DIB",
	9:      "CF_PALETTE",
	10:     "CF_PENDATA",
	11:     "CF_RIFF",
	12:     "CF_WAVE",
	13:     "CF_UNICODETEXT",
	14:     "CF_ENHMETAFILE",
	15:     "CF_HDROP",
	16:     "CF_LOCALE",
	17:     "CF_DIBV5",
	130:    "CF_DSPBITMAP",
	129:    "CF_DSPTEXT",
	131:    "CF_DSPMETAFILEPICT",
	142:    "CF_DSPENHMETAFILE",
	0x03FF: "CF_GDIOBJLAST",
	0x0200: "CF_PRIVATEFIRST",
}

var formatRank = map[string]int{
	"CF_UNICODETEXT": 1,
	"CF_DIBV5":       2,
	//"CF_DIB":         2,
	"PNG":         2,
	"HTML Format": 3,
	"CF_HDROP":    4,
}

func Get() (Clipboard, error) {
	return innerGetClipboard(true)
}

func GetMeta() (Clipboard, error) {
	return innerGetClipboard(false)
}

func innerGetClipboard(withFetch bool) (Clipboard, error) {
	runtime.LockOSThread()
	defer runtime.UnlockOSThread()
	var tmpData interface{}
	var c = Clipboard{
		plateform: "windows",
	}
	err := win32api.OpenClipboard(0)
	if err != nil {
		return c, fmt.Errorf("OpenClipboard error: %v", err)
	}
	defer win32api.CloseClipboard()
	formats, err := win32api.GetUpdatedClipboardFormatsAll()
	if err != nil {
		return c, fmt.Errorf("GetUpdatedClipboardFormatsAll error: %v", err)
	}
	var firstFormatName, secondFormatName string
	var firstFormat, secondFormat int = 65535, 65535
	for _, format := range formats {
		if d, ok := winformat[format]; ok {
			if formatRank[d] > 0 {
				if formatRank[d] < firstFormat {
					secondFormat = firstFormat
					secondFormatName = firstFormatName
					firstFormat = formatRank[d]
					firstFormatName = d
				} else if formatRank[d] != firstFormat && formatRank[d] < secondFormat {
					secondFormat = formatRank[d]
					secondFormatName = d
				}
			}
			c.winOriginTypes = append(c.winOriginTypes, d)
			continue
		}
		d, e := win32api.GetClipboardFormatName(format)
		if e != nil {
			continue
		}
		if formatRank[d] > 0 {
			if formatRank[d] < firstFormat {
				secondFormat = firstFormat
				secondFormatName = firstFormatName
				firstFormat = formatRank[d]
				firstFormatName = d
			} else if formatRank[d] != firstFormat && formatRank[d] < secondFormat {
				secondFormat = formatRank[d]
				secondFormatName = d
			}
		}
		c.winOriginTypes = append(c.winOriginTypes, d)
	}

	c.primaryOriType = firstFormatName
	switch c.primaryOriType {
	case "CF_UNICODETEXT":
		c.primaryType = Text
	case "HTML Format":
		c.primaryType = HTML
	case "PNG", "CF_DIBV5", "CF_DIB":
		c.primaryType = Image
	case "CF_HDROP":
		c.primaryType = File
	}
	if withFetch {
		tmpData, err = AutoFetcher(firstFormatName)
		if err != nil {
			return c, fmt.Errorf("AutoFetcher error: %v", err)
		}
		c.primaryData = tmpData.([]byte)
		c.primarySize = len(c.primaryData)
	} else {
		c.primarySize, err = ClipSize(firstFormatName)
		if err != nil {
			return c, fmt.Errorf("ClipSize error: %v", err)
		}
	}

	if secondFormatName != "" {
		switch secondFormatName {
		case "CF_UNICODETEXT":
			c.secondaryType = Text
		case "HTML Format":
			c.secondaryType = HTML
		case "PNG", "CF_DIBV5", "CF_DIB":
			c.secondaryType = Image
		case "CF_HDROP":
			c.secondaryType = File
		}
		c.secondaryOriType = secondFormatName
		if withFetch {
			tmpData, err = AutoFetcher(secondFormatName)
			if err != nil {
				return c, fmt.Errorf("AutoFetcher error: %v", err)
			}
			c.secondaryData = tmpData.([]byte)
			c.secondarySize = len(c.secondaryData)
		} else {
			c.secondarySize, err = ClipSize(secondFormatName)
			if err != nil {
				return c, fmt.Errorf("ClipSize error: %v", err)
			}
		}
		if err != nil {
			return c, fmt.Errorf("AutoFetcher error: %v", err)
		}
	}
	return c, nil
}