package imageproc

import (
	"time"

	"github.com/airbusgeo/godal"
	log "github.com/sirupsen/logrus"
)

func setGeoTransform(ds *godal.Dataset, topLeftX, topLeftY, width, height, resolution float64) {
	// 设置地理变换（假设左上角坐标为(0,0)，PAN每个像素分辨率为1.2米）
	geotransform := [6]float64{
		0,           // top left x
		resolution,  // w-e pixel resolution
		0,           // rotation, 0 if image is "north up"
		0,           // top left y
		0,           // rotation, 0 if image is "north up"
		-resolution, // n-s pixel resolution (negative value)
	}
	err := ds.SetGeoTransform(geotransform)
	if err != nil {
		log.Errorf("Failed to set GeoTransform: %v", err)
	}

	// 设置投影信息（WGS84）
	err = ds.SetProjection(calculateProj(topLeftX, topLeftY, width, height, resolution))
	if err != nil {
		log.Errorf("Failed to set projection: %v", err)
	}

	// 设置一些常见的元数据（可选）
	ds.SetMetadata("TIFFTAG_DATETIME", time.Now().String())
	ds.SetMetadata("TIFFTAG_SOFTWARE", "StarWiz-SJY01-IMAGE-PROC")
}