package com.quillstudios.pokegoalshelper

import android.content.Context
import android.graphics.*
import android.util.Log
import android.view.*
import android.widget.TextView
import kotlin.math.min

class DetectionOverlay(private val context: Context) {
    
    companion object {
        private const val TAG = "DetectionOverlay"
    }
    
    private var windowManager: WindowManager? = null
    private var overlayView: View? = null
    private var isShowing = false
    
    init {
        windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
    }
    
    fun showOverlay(regions: Map<String, ScreenRegion>) {
        try {
            Log.i(TAG, "🎨 showOverlay called with ${regions.size} regions")
            
            // Check overlay permission first
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
                if (!android.provider.Settings.canDrawOverlays(context)) {
                    Log.e(TAG, "❌ OVERLAY PERMISSION NOT GRANTED! Cannot show overlay.")
                    return
                } else {
                    Log.i(TAG, "✅ Overlay permission granted")
                }
            }
            
            if (isShowing) {
                Log.i(TAG, "🔄 Hiding existing overlay first")
                hideOverlay()
            }
            
            Log.i(TAG, "🎨 Creating overlay view...")
            val overlayLayout = OverlayView(context, regions)
            
            val layoutParams = WindowManager.LayoutParams(
                WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE or
                        WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE or
                        WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
                PixelFormat.TRANSLUCENT
            )
            
            layoutParams.gravity = Gravity.TOP or Gravity.START
            layoutParams.x = 0
            layoutParams.y = 0
            
            Log.i(TAG, "🎨 Adding view to WindowManager...")
            windowManager?.addView(overlayLayout, layoutParams)
            overlayView = overlayLayout
            isShowing = true
            
            Log.i(TAG, "✅ Detection overlay shown successfully with ${regions.size} regions")
            
            // No auto-hide - overlay stays until manually hidden or new detections
            
        } catch (e: Exception) {
            Log.e(TAG, "❌ Error showing overlay", e)
        }
    }
    
    fun hideOverlay() {
        try {
            if (isShowing && overlayView != null) {
                windowManager?.removeView(overlayView)
                overlayView = null
                isShowing = false
                Log.d(TAG, "Detection overlay hidden")
            }
        } catch (e: Exception) {
            Log.e(TAG, "Error hiding overlay", e)
        }
    }
    
    private class OverlayView(context: Context, private val regions: Map<String, ScreenRegion>) : View(context) {
        
        private val rectPaint = Paint().apply {
            color = Color.RED
            style = Paint.Style.STROKE
            strokeWidth = 4f
            alpha = 200
        }
        
        private val fillPaint = Paint().apply {
            color = Color.RED
            style = Paint.Style.FILL
            alpha = 50
        }
        
        private val textPaint = Paint().apply {
            color = Color.WHITE
            textSize = 32f
            isAntiAlias = true
            style = Paint.Style.FILL
            setShadowLayer(4f, 2f, 2f, Color.BLACK)
        }
        
        private val backgroundPaint = Paint().apply {
            color = Color.BLACK
            style = Paint.Style.FILL
            alpha = 150
        }
        
        private val colors = listOf(
            Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW, 
            Color.MAGENTA, Color.CYAN, Color.parseColor("#FFA500"), Color.parseColor("#FF6B35"),
            Color.parseColor("#7209B7"), Color.parseColor("#2F9599"), 
            Color.parseColor("#F18F01"), Color.parseColor("#C73E1D")
        )
        
        override fun onDraw(canvas: Canvas) {
            super.onDraw(canvas)
            
            val displayMetrics = context.resources.displayMetrics
            val screenWidth = displayMetrics.widthPixels
            val screenHeight = displayMetrics.heightPixels
            
            Log.i(TAG, "🎨 Drawing overlay on ${screenWidth}x${screenHeight} screen with ${regions.size} regions")
            
            var colorIndex = 0
            
            for ((name, region) in regions) {
                try {
                    // Use different colors for each region
                    val color = colors[colorIndex % colors.size]
                    colorIndex++
                    
                    rectPaint.color = color
                    fillPaint.color = color
                    fillPaint.alpha = 30
                    
                    // Draw filled rectangle
                    canvas.drawRect(
                        region.x.toFloat(),
                        region.y.toFloat(),
                        (region.x + region.width).toFloat(),
                        (region.y + region.height).toFloat(),
                        fillPaint
                    )
                    
                    // Draw border
                    canvas.drawRect(
                        region.x.toFloat(),
                        region.y.toFloat(),
                        (region.x + region.width).toFloat(),
                        (region.y + region.height).toFloat(),
                        rectPaint
                    )
                    
                    // Draw label above the box
                    val labelText = formatRegionLabel(name, region)
                    val textX = region.x.toFloat() + 8f
                    
                    // Calculate text background size
                    val textBounds = Rect()
                    textPaint.getTextBounds(labelText, 0, labelText.length, textBounds)
                    val textWidth = textBounds.width() + 16f
                    val textHeight = textBounds.height() + 16f
                    
                    // Position text above the region box
                    val textY = region.y.toFloat() - 8f
                    val backgroundTop = textY - textHeight + 8f
                    val backgroundBottom = textY + 8f
                    
                    // Draw text background above the box
                    canvas.drawRect(
                        textX - 8f,
                        backgroundTop,
                        textX + textWidth,
                        backgroundBottom,
                        backgroundPaint
                    )
                    
                    // Draw text above the box
                    canvas.drawText(labelText, textX, textY, textPaint)
                    
                } catch (e: Exception) {
                    Log.e(TAG, "Error drawing region $name", e)
                }
            }
            
            // Draw title at top
            /*
            val titleText = "Pokemon Detection Zones (${regions.size} regions)"
            val titleX = 20f
            val titleY = 80f
            
            val titleBounds = Rect()
            val titlePaint = Paint().apply {
                color = Color.WHITE
                textSize = 48f
                isAntiAlias = true
                style = Paint.Style.FILL
                setShadowLayer(4f, 2f, 2f, Color.BLACK)
            }
            
            titlePaint.getTextBounds(titleText, 0, titleText.length, titleBounds)
            
            // Draw title background
            canvas.drawRect(
                titleX - 16f,
                titleY - titleBounds.height() - 16f,
                titleX + titleBounds.width() + 32f,
                titleY + 16f,
                backgroundPaint
            )
            
            // Draw title
            canvas.drawText(titleText, titleX, titleY, titlePaint)
            */
        }
        
        fun formatRegionLabel(name: String, region: ScreenRegion): String {
            val shortName = when (name) {
                "nickname" -> "NICKNAME"
                "level" -> "LEVEL"
                "species" -> "SPECIES"
                "types" -> "TYPES"
                "stats" -> "STATS"
                "moves" -> "MOVES"
                "nature" -> "NATURE"
                "ability" -> "ABILITY"
                "ot_name" -> "OT NAME"
                "ot_id" -> "OT ID"
                "gender" -> "GENDER"
                "pokeball" -> "POKEBALL"
                "favorite" -> "FAVORITE"
                "stamps" -> "STAMPS"
                "labels" -> "LABELS"
                "marks" -> "MARKS"
                "game_source" -> "GAME SOURCE"
                else -> name.uppercase()
            }
            
            return "$shortName\n${region.width}x${region.height}"
        }
    }
}