// Debug tool to analyze D2R screenshots and calibrate vision parameters.
package main

import (
	"fmt"
	"image"
	"image/png"
	_ "image/png"
	"log"
	"os"
	"path/filepath"

	"git.cloonar.com/openclawd/iso-bot/pkg/engine/vision"
	"git.cloonar.com/openclawd/iso-bot/plugins/d2r"
)

func main() {
	// Load the real D2R screenshot
	screenshotPath := "testdata/d2r_1080p.png"
	fmt.Printf("Analyzing D2R screenshot: %s\n", screenshotPath)

	img, err := loadImage(screenshotPath)
	if err != nil {
		log.Fatalf("Failed to load screenshot: %v", err)
	}

	fmt.Printf("Image size: %dx%d\n", img.Bounds().Dx(), img.Bounds().Dy())

	// Get current config
	config := d2r.DefaultConfig()

	// Create debug directory
	debugDir := "testdata/debug"
	os.MkdirAll(debugDir, 0755)

	// Define regions for 1080p (from config.go — calibrated from real screenshot)
	regions := map[string]image.Rectangle{
		"health_orb":  image.Rect(370, 945, 460, 1030),
		"mana_orb":    image.Rect(1580, 910, 1670, 1000),
		"xp_bar":      image.Rect(0, 1058, 1920, 1080),
		"belt":        image.Rect(500, 990, 900, 1040),
		"minimap":     image.Rect(1600, 0, 1920, 320),
		"inventory":   image.Rect(960, 330, 1490, 770),
		"stash":       image.Rect(430, 330, 960, 770),
		"skill_left":  image.Rect(200, 1030, 250, 1078),
		"skill_right": image.Rect(1670, 1030, 1730, 1078),
	}

	fmt.Println("\n=== REGION ANALYSIS ===")
	
	// Analyze health orb
	analyzeRegion(img, "health_orb", regions["health_orb"], config.Colors.HealthFilled, debugDir)
	
	// Analyze mana orb  
	analyzeRegion(img, "mana_orb", regions["mana_orb"], config.Colors.ManaFilled, debugDir)

	// Sample some specific pixels in the orbs for detailed analysis
	fmt.Println("\n=== PIXEL SAMPLING ===")
	samplePixelsInRegion(img, "health_orb", regions["health_orb"])
	samplePixelsInRegion(img, "mana_orb", regions["mana_orb"])

	// Suggest new HSV ranges based on analysis
	fmt.Println("\n=== RECOMMENDATIONS ===")
	recommendHealthRange(img, regions["health_orb"])
	recommendManaRange(img, regions["mana_orb"])

	fmt.Printf("\nDebug images saved to: %s\n", debugDir)
	fmt.Println("Run this tool after implementing the fixes to verify detection works correctly.")
}

func analyzeRegion(img image.Image, name string, region image.Rectangle, currentColor d2r.HSVRange, debugDir string) {
	fmt.Printf("\n--- %s ---\n", name)
	fmt.Printf("Region: (%d,%d) -> (%d,%d) [%dx%d]\n", 
		region.Min.X, region.Min.Y, region.Max.X, region.Max.Y, 
		region.Dx(), region.Dy())

	// Extract the region
	bounds := region.Intersect(img.Bounds())
	if bounds.Empty() {
		fmt.Printf("ERROR: Region is outside image bounds!\n")
		return
	}

	// Crop and save the region
	cropped := cropImage(img, bounds)
	cropPath := filepath.Join(debugDir, fmt.Sprintf("debug_%s.png", name))
	if err := saveImage(cropped, cropPath); err != nil {
		fmt.Printf("WARNING: Failed to save cropped image: %v\n", err)
	}

	// Analyze colors in the region
	totalPixels := 0
	matchingPixels := 0
	var minH, maxH, minS, maxS, minV, maxV = 360, 0, 255, 0, 255, 0
	var avgR, avgG, avgB float64

	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
		for x := bounds.Min.X; x < bounds.Max.X; x++ {
			c := img.At(x, y)
			r, g, b, _ := c.RGBA()
			// Convert to 8-bit
			r, g, b = r>>8, g>>8, b>>8
			
			avgR += float64(r)
			avgG += float64(g)
			avgB += float64(b)

			hsv := vision.RGBToHSV(c)
			totalPixels++

			// Track HSV ranges  
			if hsv.H < minH { minH = hsv.H }
			if hsv.H > maxH { maxH = hsv.H }
			if hsv.S < minS { minS = hsv.S }
			if hsv.S > maxS { maxS = hsv.S }
			if hsv.V < minV { minV = hsv.V }
			if hsv.V > maxV { maxV = hsv.V }

			// Check if current color range matches
			if hsv.H >= currentColor.LowerH && hsv.H <= currentColor.UpperH &&
			   hsv.S >= currentColor.LowerS && hsv.S <= currentColor.UpperS &&
			   hsv.V >= currentColor.LowerV && hsv.V <= currentColor.UpperV {
				matchingPixels++
			}
		}
	}

	if totalPixels > 0 {
		avgR /= float64(totalPixels)
		avgG /= float64(totalPixels)
		avgB /= float64(totalPixels)
	}

	fmt.Printf("Current HSV range: H[%d-%d] S[%d-%d] V[%d-%d]\n",
		currentColor.LowerH, currentColor.UpperH,
		currentColor.LowerS, currentColor.UpperS,
		currentColor.LowerV, currentColor.UpperV)

	fmt.Printf("Actual HSV range: H[%d-%d] S[%d-%d] V[%d-%d]\n",
		minH, maxH, minS, maxS, minV, maxV)
	
	fmt.Printf("Average RGB: (%.1f, %.1f, %.1f)\n", avgR, avgG, avgB)
	
	matchPct := float64(matchingPixels) / float64(totalPixels) * 100
	fmt.Printf("Matching pixels: %d/%d (%.1f%%)\n", matchingPixels, totalPixels, matchPct)
	
	if matchPct < 30 {
		fmt.Printf("⚠️  WARNING: Low match rate! Current HSV range may need adjustment.\n")
	} else if matchPct > 80 {
		fmt.Printf("✅ Good match rate.\n")
	} else {
		fmt.Printf("⚠️  Moderate match rate - consider refining HSV range.\n")
	}

	fmt.Printf("Saved cropped region to: debug_%s.png\n", name)
}

func samplePixelsInRegion(img image.Image, regionName string, region image.Rectangle) {
	fmt.Printf("\n--- %s Pixel Samples ---\n", regionName)
	
	bounds := region.Intersect(img.Bounds())
	if bounds.Empty() {
		return
	}

	// Sample pixels at different positions in the region
	samples := []struct {
		name string
		x, y int
	}{
		{"center", (bounds.Min.X + bounds.Max.X) / 2, (bounds.Min.Y + bounds.Max.Y) / 2},
		{"top-left", bounds.Min.X + 10, bounds.Min.Y + 10},
		{"top-right", bounds.Max.X - 10, bounds.Min.Y + 10},
		{"bottom-left", bounds.Min.X + 10, bounds.Max.Y - 10},
		{"bottom-right", bounds.Max.X - 10, bounds.Max.Y - 10},
	}

	for _, sample := range samples {
		if sample.x >= bounds.Min.X && sample.x < bounds.Max.X &&
		   sample.y >= bounds.Min.Y && sample.y < bounds.Max.Y {
			
			c := img.At(sample.x, sample.y)
			r, g, b, _ := c.RGBA()
			r, g, b = r>>8, g>>8, b>>8
			hsv := vision.RGBToHSV(c)
			
			fmt.Printf("  %s (%d,%d): RGB(%d,%d,%d) HSV(%d,%d,%d)\n",
				sample.name, sample.x, sample.y, r, g, b, hsv.H, hsv.S, hsv.V)
		}
	}
}

func recommendHealthRange(img image.Image, region image.Rectangle) {
	fmt.Println("\n--- Health Orb HSV Range Recommendations ---")
	
	bounds := region.Intersect(img.Bounds())
	if bounds.Empty() {
		return
	}

	// Find red-ish pixels (health orb is red)
	var redPixels []vision.HSV
	
	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
		for x := bounds.Min.X; x < bounds.Max.X; x++ {
			c := img.At(x, y)
			r, g, b, _ := c.RGBA()
			r, g, b = r>>8, g>>8, b>>8
			
			// Look for pixels that are predominantly red
			if r > 50 && r > g && r > b {
				hsv := vision.RGBToHSV(c)
				redPixels = append(redPixels, hsv)
			}
		}
	}
	
	if len(redPixels) == 0 {
		fmt.Println("No red-ish pixels found - health orb might be empty or coordinates wrong")
		return
	}

	// Calculate ranges with some padding
	minH, maxH := 360, 0
	minS, maxS := 255, 0
	minV, maxV := 255, 0
	
	for _, hsv := range redPixels {
		if hsv.H < minH { minH = hsv.H }
		if hsv.H > maxH { maxH = hsv.H }
		if hsv.S < minS { minS = hsv.S }
		if hsv.S > maxS { maxS = hsv.S }
		if hsv.V < minV { minV = hsv.V }
		if hsv.V > maxV { maxV = hsv.V }
	}

	// Add padding for gradients/textures
	hPadding := 10
	sPadding := 30
	vPadding := 50

	// Handle hue wrap-around for reds
	if minH < hPadding {
		minH = 0
	} else {
		minH -= hPadding
	}
	if maxH + hPadding > 360 {
		maxH = 360
	} else {
		maxH += hPadding
	}

	minS = max(0, minS-sPadding)
	maxS = min(255, maxS+sPadding)
	minV = max(0, minV-vPadding)
	maxV = min(255, maxV+vPadding)

	fmt.Printf("Found %d red pixels in health orb region\n", len(redPixels))
	fmt.Printf("Recommended health HSV range: H[%d-%d] S[%d-%d] V[%d-%d]\n", 
		minH, maxH, minS, maxS, minV, maxV)
	fmt.Printf("Go code: HealthFilled: HSVRange{%d, %d, %d, %d, %d, %d},\n",
		minH, minS, minV, maxH, maxS, maxV)
}

func recommendManaRange(img image.Image, region image.Rectangle) {
	fmt.Println("\n--- Mana Orb HSV Range Recommendations ---")
	
	bounds := region.Intersect(img.Bounds())
	if bounds.Empty() {
		return
	}

	// Find blue-ish pixels (mana orb is blue)
	var bluePixels []vision.HSV
	
	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
		for x := bounds.Min.X; x < bounds.Max.X; x++ {
			c := img.At(x, y)
			r, g, b, _ := c.RGBA()
			r, g, b = r>>8, g>>8, b>>8
			
			// Look for pixels that are predominantly blue
			if b > 50 && b > r && b > g {
				hsv := vision.RGBToHSV(c)
				bluePixels = append(bluePixels, hsv)
			}
		}
	}
	
	if len(bluePixels) == 0 {
		fmt.Println("No blue-ish pixels found - mana orb might be empty or coordinates wrong")
		return
	}

	// Calculate ranges with some padding
	minH, maxH := 360, 0
	minS, maxS := 255, 0
	minV, maxV := 255, 0
	
	for _, hsv := range bluePixels {
		if hsv.H < minH { minH = hsv.H }
		if hsv.H > maxH { maxH = hsv.H }
		if hsv.S < minS { minS = hsv.S }
		if hsv.S > maxS { maxS = hsv.S }
		if hsv.V < minV { minV = hsv.V }
		if hsv.V > maxV { maxV = hsv.V }
	}

	// Add padding for gradients/textures
	hPadding := 10
	sPadding := 30
	vPadding := 50

	minH = max(0, minH-hPadding)
	maxH = min(360, maxH+hPadding)
	minS = max(0, minS-sPadding)
	maxS = min(255, maxS+sPadding)
	minV = max(0, minV-vPadding)
	maxV = min(255, maxV+vPadding)

	fmt.Printf("Found %d blue pixels in mana orb region\n", len(bluePixels))
	fmt.Printf("Recommended mana HSV range: H[%d-%d] S[%d-%d] V[%d-%d]\n", 
		minH, maxH, minS, maxS, minV, maxV)
	fmt.Printf("Go code: ManaFilled: HSVRange{%d, %d, %d, %d, %d, %d},\n",
		minH, minS, minV, maxH, maxS, maxV)
}

func loadImage(path string) (image.Image, error) {
	file, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer file.Close()

	img, _, err := image.Decode(file)
	return img, err
}

func saveImage(img image.Image, path string) error {
	file, err := os.Create(path)
	if err != nil {
		return err
	}
	defer file.Close()

	return png.Encode(file, img)
}

func cropImage(img image.Image, bounds image.Rectangle) image.Image {
	if subImg, ok := img.(interface {
		SubImage(r image.Rectangle) image.Image
	}); ok {
		return subImg.SubImage(bounds)
	}
	
	// Fallback: manually copy pixels
	cropped := image.NewRGBA(image.Rect(0, 0, bounds.Dx(), bounds.Dy()))
	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
		for x := bounds.Min.X; x < bounds.Max.X; x++ {
			cropped.Set(x-bounds.Min.X, y-bounds.Min.Y, img.At(x, y))
		}
	}
	return cropped
}

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}