//go:build opencv

package uixt

import (
	"bytes"
	"image"
	"io/ioutil"
	"os"

	cvHelper "github.com/electricbubble/opencv-helper"
)

const (
	// TmCcoeffNormed maps to TM_CCOEFF_NORMED
	TmCcoeffNormed TemplateMatchMode = iota
	// TmSqdiff maps to TM_SQDIFF
	TmSqdiff
	// TmSqdiffNormed maps to TM_SQDIFF_NORMED
	TmSqdiffNormed
	// TmCcorr maps to TM_CCORR
	TmCcorr
	// TmCcorrNormed maps to TM_CCORR_NORMED
	TmCcorrNormed
	// TmCcoeff maps to TM_CCOEFF
	TmCcoeff
)

type DebugMode int

const (
	// DmOff no output
	DmOff DebugMode = iota
	// DmEachMatch output matched and mismatched values
	DmEachMatch
	// DmNotMatch output only values that do not match
	DmNotMatch
)

// Extend 获得扩展后的 Driver，
// 并指定匹配阀值，
// 获取当前设备的 Scale，
// 默认匹配模式为 TmCcoeffNormed，
// 默认关闭 OpenCV 匹配值计算后的输出
func Extend(driver WebDriver, options ...CVOption) (dExt *DriverExt, err error) {
	dExt, err = extend(driver)
	if err != nil {
		return nil, err
	}

	for _, option := range options {
		option(&dExt.CVArgs)
	}

	if dExt.threshold == 0 {
		dExt.threshold = 0.95 // default threshold
	}
	if dExt.matchMode == 0 {
		dExt.matchMode = TmCcoeffNormed // default match mode
	}
	cvHelper.Debug(cvHelper.DebugMode(DmOff))
	return
}

func (dExt *DriverExt) Debug(dm DebugMode) {
	cvHelper.Debug(cvHelper.DebugMode(dm))
}

func (dExt *DriverExt) OnlyOnceThreshold(threshold float64) (newExt *DriverExt) {
	newExt = new(DriverExt)
	newExt.Driver = dExt.Driver
	newExt.scale = dExt.scale
	newExt.matchMode = dExt.matchMode
	newExt.threshold = threshold
	return
}

func (dExt *DriverExt) OnlyOnceMatchMode(matchMode TemplateMatchMode) (newExt *DriverExt) {
	newExt = new(DriverExt)
	newExt.Driver = dExt.Driver
	newExt.scale = dExt.scale
	newExt.matchMode = matchMode
	newExt.threshold = dExt.threshold
	return
}

// func (sExt *DriverExt) findImgRect(search string) (rect image.Rectangle, err error) {
// 	pathSource := filepath.Join(sExt.pathname, cvHelper.GenFilename())
// 	if err = sExt.driver.ScreenshotToDisk(pathSource); err != nil {
// 		return image.Rectangle{}, err
// 	}
//
// 	if rect, err = cvHelper.FindImageRectFromDisk(pathSource, search, float32(sExt.Threshold), cvHelper.TemplateMatchMode(sExt.MatchMode)); err != nil {
// 		return image.Rectangle{}, err
// 	}
// 	return
// }

func (dExt *DriverExt) FindAllImageRect(search string) (rects []image.Rectangle, err error) {
	var bufSource, bufSearch *bytes.Buffer
	if bufSearch, err = getBufFromDisk(search); err != nil {
		return nil, err
	}
	if bufSource, err = dExt.takeScreenShot(); err != nil {
		return nil, err
	}

	if rects, err = cvHelper.FindAllImageRectsFromRaw(bufSource, bufSearch, float32(dExt.threshold), cvHelper.TemplateMatchMode(dExt.matchMode)); err != nil {
		return nil, err
	}
	return
}

func (dExt *DriverExt) FindImageRectInUIKit(imagePath string, index ...int) (x, y, width, height float64, err error) {
	var bufSource, bufSearch *bytes.Buffer
	if bufSearch, err = getBufFromDisk(imagePath); err != nil {
		return 0, 0, 0, 0, err
	}
	if bufSource, err = dExt.takeScreenShot(); err != nil {
		return 0, 0, 0, 0, err
	}

	var rect image.Rectangle
	if rect, err = cvHelper.FindImageRectFromRaw(bufSource, bufSearch, float32(dExt.threshold), cvHelper.TemplateMatchMode(dExt.matchMode)); err != nil {
		return 0, 0, 0, 0, err
	}

	// if rect, err = dExt.findImgRect(search); err != nil {
	// 	return 0, 0, 0, 0, err
	// }
	x, y, width, height = dExt.MappingToRectInUIKit(rect)
	return
}

func getBufFromDisk(name string) (*bytes.Buffer, error) {
	var f *os.File
	var err error
	if f, err = os.Open(name); err != nil {
		return nil, err
	}
	var all []byte
	if all, err = ioutil.ReadAll(f); err != nil {
		return nil, err
	}
	return bytes.NewBuffer(all), nil
}