package com.quillstudios.pokegoalshelper.ui

import android.animation.ObjectAnimator
import android.animation.ValueAnimator
import android.animation.AnimatorListenerAdapter
import android.animation.Animator
import android.content.Context
import android.graphics.PixelFormat
import android.graphics.drawable.GradientDrawable
import android.os.Build
import android.util.TypedValue
import android.view.*
import android.view.animation.AccelerateDecelerateInterpolator
import android.widget.*
import androidx.core.content.ContextCompat
import com.quillstudios.pokegoalshelper.R
import com.quillstudios.pokegoalshelper.models.DetectionResult
import com.quillstudios.pokegoalshelper.utils.PGHLog
import java.time.format.DateTimeFormatter
import kotlin.math.abs

/**
 * Bottom drawer that slides up to display detection results immediately after capture.
 * 
 * Features:
 * - Slides up from bottom with smooth animation
 * - Shows Pokemon detection results with formatted data
 * - Auto-dismiss after timeout or manual dismiss
 * - Expandable for more details
 * - Gesture handling for swipe dismiss
 */
class ResultsBottomDrawer(private val context: Context)
{
    companion object
    {
        private const val TAG = "ResultsBottomDrawer"
        private const val DRAWER_HEIGHT_COLLAPSED_DP = 80
        private const val DRAWER_HEIGHT_EXPANDED_DP = 400 // Increased to show all data
        private const val SLIDE_ANIMATION_DURATION = 300L
        private const val SWIPE_THRESHOLD = 100f
        private const val EXPAND_THRESHOLD = -50f // Negative because we're pulling up
    }
    
    private var windowManager: WindowManager? = null
    private var drawerContainer: LinearLayout? = null
    private var drawerParams: WindowManager.LayoutParams? = null
    private var isShowing = false
    private var isDragging = false
    private var isExpanded = false
    private var currentDetectionResult: DetectionResult? = null
    
    // Touch handling
    private var initialTouchY = 0f
    private var initialTranslationY = 0f
    
    fun show(result: DetectionResult)
    {
        if (isShowing) return
        
        try
        {
            windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
            currentDetectionResult = result
            createDrawerView(result)
            isShowing = true
            
            PGHLog.d(TAG, "Bottom drawer shown for detection: ${result.id}")
        }
        catch (e: Exception)
        {
            PGHLog.e(TAG, "Failed to show bottom drawer", e)
        }
    }
    
    fun hide()
    {
        if (!isShowing) return
        
        try
        {
            // Animate out
            animateOut {
                try
                {
                    drawerContainer?.let { windowManager?.removeView(it) }
                    cleanup()
                }
                catch (e: Exception)
                {
                    PGHLog.e(TAG, "Error removing drawer view", e)
                }
            }
            
            PGHLog.d(TAG, "Bottom drawer hidden")
        }
        catch (e: Exception)
        {
            PGHLog.e(TAG, "Failed to hide bottom drawer", e)
        }
    }
    
    private fun createDrawerView(result: DetectionResult)
    {
        val screenSize = getScreenSize()
        val drawerHeight = dpToPx(DRAWER_HEIGHT_COLLAPSED_DP) // Start collapsed
        
        // Create main container
        drawerContainer = LinearLayout(context).apply {
            orientation = LinearLayout.VERTICAL
            background = createDrawerBackground()
            gravity = Gravity.CENTER_HORIZONTAL
            setPadding(dpToPx(16), dpToPx(12), dpToPx(16), dpToPx(16))
            
            // Add drag handle
            addView(createDragHandle())
            
            // Add collapsed content (always visible)
            addView(createCollapsedContent(result))
            
            // Add expanded content (initially hidden)
            addView(createExpandedContent(result))
            
            // Set up touch handling for swipe and expand
            setOnTouchListener(createExpandableSwipeTouchListener())
        }
        
        // Create window parameters
        drawerParams = WindowManager.LayoutParams(
            WindowManager.LayoutParams.MATCH_PARENT,
            drawerHeight,
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
            {
                WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY
            }
            else
            {
                @Suppress("DEPRECATION")
                WindowManager.LayoutParams.TYPE_PHONE
            },
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE or
            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL or
            WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
            PixelFormat.TRANSLUCENT
        ).apply {
            gravity = Gravity.BOTTOM
            y = 0
        }
        
        // Add to window manager
        windowManager?.addView(drawerContainer, drawerParams)
        
        // Animate in
        animateIn()
    }
    
    private fun createDragHandle(): View
    {
        return View(context).apply {
            background = GradientDrawable().apply {
                setColor(ContextCompat.getColor(context, android.R.color.darker_gray))
                cornerRadius = dpToPx(2).toFloat()
            }
            
            layoutParams = LinearLayout.LayoutParams(
                dpToPx(40),
                dpToPx(4)
            ).apply {
                setMargins(0, 0, 0, dpToPx(8))
            }
        }
    }
    
    private fun createCollapsedContent(result: DetectionResult): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            // Status icon
            val statusIcon = ImageView(context).apply {
                setImageResource(
                    if (result.success) android.R.drawable.ic_menu_myplaces 
                    else android.R.drawable.ic_dialog_alert
                )
                setColorFilter(
                    ContextCompat.getColor(
                        context,
                        if (result.success) android.R.color.holo_green_light
                        else android.R.color.holo_red_light
                    )
                )
                layoutParams = LinearLayout.LayoutParams(
                    dpToPx(20),
                    dpToPx(20)
                ).apply {
                    setMargins(0, 0, dpToPx(8), 0)
                }
            }
            
            // Main content (compact)
            val mainContent = createCompactDataRow(result)
            
            // Dismiss button
            val dismissButton = ImageButton(context).apply {
                setImageResource(android.R.drawable.ic_menu_close_clear_cancel)
                background = createCircularBackground()
                setColorFilter(ContextCompat.getColor(context, android.R.color.white))
                setOnClickListener { hide() }
                
                layoutParams = LinearLayout.LayoutParams(
                    dpToPx(24),
                    dpToPx(24)
                ).apply {
                    setMargins(dpToPx(8), 0, 0, 0)
                }
            }
            
            addView(statusIcon)
            addView(mainContent)
            addView(dismissButton)
        }
    }
    
    private fun createCompactDataRow(result: DetectionResult): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            )
            
            if (result.success && result.pokemonInfo != null)
            {
                val pokemonInfo = result.pokemonInfo
                val dataPoints = mutableListOf<String>()
                
                // Collect all available data points from actual PokemonInfo structure
                pokemonInfo.species?.let { dataPoints.add(it) }
                pokemonInfo.nationalDexNumber?.let { dataPoints.add("#$it") }
                pokemonInfo.level?.let { dataPoints.add("Lv$it") }
                pokemonInfo.gender?.let { dataPoints.add(it) }
                if (pokemonInfo.isShiny) dataPoints.add("✨")
                if (pokemonInfo.isAlpha) dataPoints.add("🅰")
                
                // Add processing time
                dataPoints.add("${result.processingTimeMs}ms")
                
                // Create compact display
                val compactText = if (dataPoints.isNotEmpty()) {
                    dataPoints.joinToString(" • ")
                } else {
                    "Pokemon detected"
                }
                
                val textView = TextView(context).apply {
                    text = compactText
                    setTextSize(TypedValue.COMPLEX_UNIT_SP, 12f)
                    setTextColor(ContextCompat.getColor(context, android.R.color.white))
                    maxLines = 1
                    setSingleLine(true)
                }
                
                addView(textView)
            }
            else
            {
                val textView = TextView(context).apply {
                    text = "${if (result.success) "No Pokemon" else "Failed"} • ${result.processingTimeMs}ms"
                    setTextSize(TypedValue.COMPLEX_UNIT_SP, 12f)
                    setTextColor(ContextCompat.getColor(context, android.R.color.darker_gray))
                }
                
                addView(textView)
            }
        }
    }
    
    private fun createExpandedContent(result: DetectionResult): ScrollView
    {
        return ScrollView(context).apply {
            visibility = View.GONE // Initially hidden
            tag = "expanded_content" // For easy finding
            
            // Create the scrollable content container
            val contentContainer = LinearLayout(context).apply {
                orientation = LinearLayout.VERTICAL
                setPadding(0, dpToPx(8), 0, dpToPx(16)) // Add bottom padding for scroll
            }
            
            if (result.success && result.pokemonInfo != null)
            {
                val pokemonInfo = result.pokemonInfo
                
                // Basic Pokemon Info Section
                contentContainer.addView(createSectionHeader("Pokemon Info"))
                contentContainer.addView(createTwoColumnRow(
                    leftLabel = "Species", leftValue = pokemonInfo.species ?: "Unknown",
                    rightLabel = "Dex #", rightValue = pokemonInfo.nationalDexNumber?.let { "#$it" } ?: "N/A"
                ))
                
                contentContainer.addView(createTwoColumnRow(
                    leftLabel = "Nickname", leftValue = pokemonInfo.nickname ?: "None",
                    rightLabel = "Gender", rightValue = pokemonInfo.gender ?: "Unknown"
                ))
                
                contentContainer.addView(createTwoColumnRow(
                    leftLabel = "Level", leftValue = pokemonInfo.level?.toString() ?: "N/A",
                    rightLabel = "Nature", rightValue = pokemonInfo.nature ?: "Unknown"
                ))
                
                // Types Section
                contentContainer.addView(createSectionHeader("Types"))
                val typeDisplay = when {
                    pokemonInfo.primaryType != null && pokemonInfo.secondaryType != null -> 
                        "${pokemonInfo.primaryType} / ${pokemonInfo.secondaryType}"
                    pokemonInfo.primaryType != null -> pokemonInfo.primaryType
                    else -> "Unknown"
                }
                contentContainer.addView(createTwoColumnRow(
                    leftLabel = "Type", leftValue = typeDisplay,
                    rightLabel = "Tera", rightValue = pokemonInfo.teraType ?: "N/A"
                ))
                
                // Stats Section (if available)
                pokemonInfo.stats?.let { stats ->
                    contentContainer.addView(createSectionHeader("Base Stats"))
                    contentContainer.addView(createThreeColumnRow(
                        leftLabel = "HP", leftValue = stats.hp?.toString() ?: "?",
                        middleLabel = "ATK", middleValue = stats.attack?.toString() ?: "?",
                        rightLabel = "DEF", rightValue = stats.defense?.toString() ?: "?"
                    ))
                    contentContainer.addView(createThreeColumnRow(
                        leftLabel = "SP.ATK", leftValue = stats.spAttack?.toString() ?: "?",
                        middleLabel = "SP.DEF", middleValue = stats.spDefense?.toString() ?: "?",
                        rightLabel = "SPEED", rightValue = stats.speed?.toString() ?: "?"
                    ))
                }
                
                // Special Properties Section
                contentContainer.addView(createSectionHeader("Properties"))
                contentContainer.addView(createCheckboxRow(
                    leftLabel = "Shiny", leftChecked = pokemonInfo.isShiny,
                    rightLabel = "Alpha", rightChecked = pokemonInfo.isAlpha
                ))
                contentContainer.addView(createMixedRow(
                    leftLabel = "Favorited", leftChecked = pokemonInfo.isFavorited,
                    rightLabel = "Pokeball", rightValue = pokemonInfo.pokeballType ?: "Unknown"
                ))
                
                // Game Origin Section
                contentContainer.addView(createSectionHeader("Origin"))
                contentContainer.addView(createTwoColumnRow(
                    leftLabel = "Game", leftValue = pokemonInfo.gameSource ?: "Unknown",
                    rightLabel = "Language", rightValue = pokemonInfo.language ?: "Unknown"
                ))
                
                pokemonInfo.originalTrainerName?.let { trainerName ->
                    contentContainer.addView(createTwoColumnRow(
                        leftLabel = "OT Name", leftValue = trainerName,
                        rightLabel = "OT ID", rightValue = pokemonInfo.originalTrainerId ?: "Unknown"
                    ))
                }
                
                // Ability & Moves
                pokemonInfo.ability?.let { ability ->
                    contentContainer.addView(createSectionHeader("Ability & Moves"))
                    contentContainer.addView(createDetailRow("Ability", ability))
                }
                
                if (pokemonInfo.moves.isNotEmpty()) {
                    contentContainer.addView(createDetailRow("Moves", pokemonInfo.moves.take(4).joinToString(", ")))
                }
                
                // Additional Data
                if (pokemonInfo.stamps.isNotEmpty() || pokemonInfo.labels.isNotEmpty() || pokemonInfo.marks.isNotEmpty()) {
                    contentContainer.addView(createSectionHeader("Additional"))
                    if (pokemonInfo.stamps.isNotEmpty()) {
                        contentContainer.addView(createDetailRow("Stamps", pokemonInfo.stamps.joinToString(", ")))
                    }
                    if (pokemonInfo.labels.isNotEmpty()) {
                        contentContainer.addView(createDetailRow("Labels", pokemonInfo.labels.joinToString(", ")))
                    }
                    if (pokemonInfo.marks.isNotEmpty()) {
                        contentContainer.addView(createDetailRow("Marks", pokemonInfo.marks.joinToString(", ")))
                    }
                }
            }
            else
            {
                // Show error details
                contentContainer.addView(createSectionHeader("Detection Failed"))
                contentContainer.addView(createDetailRow("Status", if (result.success) "No Pokemon detected" else "Detection failed"))
                result.errorMessage?.let { error ->
                    contentContainer.addView(createDetailRow("Error", error))
                }
            }
            
            // Technical Info Section
            contentContainer.addView(createSectionHeader("Technical Info"))
            contentContainer.addView(createTwoColumnRow(
                leftLabel = "Processing", leftValue = "${result.processingTimeMs}ms",
                rightLabel = "Detected", rightValue = "${result.detections.size} items"
            ))
            contentContainer.addView(createDetailRow("Timestamp", result.timestamp.format(DateTimeFormatter.ofPattern("HH:mm:ss"))))
            
            // Add the content container to the ScrollView
            addView(contentContainer)
        }
    }
    
    private fun createDetailRow(label: String, value: String): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            val labelView = TextView(context).apply {
                text = "$label:"
                setTextSize(TypedValue.COMPLEX_UNIT_SP, 11f)
                setTextColor(ContextCompat.getColor(context, android.R.color.darker_gray))
                layoutParams = LinearLayout.LayoutParams(
                    dpToPx(80),
                    ViewGroup.LayoutParams.WRAP_CONTENT
                )
            }
            
            val valueView = TextView(context).apply {
                text = value
                setTextSize(TypedValue.COMPLEX_UNIT_SP, 11f)
                setTextColor(ContextCompat.getColor(context, android.R.color.white))
                typeface = android.graphics.Typeface.DEFAULT_BOLD
                layoutParams = LinearLayout.LayoutParams(
                    0,
                    ViewGroup.LayoutParams.WRAP_CONTENT,
                    1f
                )
            }
            
            addView(labelView)
            addView(valueView)
            
            layoutParams = LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(0, dpToPx(2), 0, dpToPx(2))
            }
        }
    }
    
    private fun createSectionHeader(title: String): TextView
    {
        return TextView(context).apply {
            text = title
            setTextSize(TypedValue.COMPLEX_UNIT_SP, 12f)
            setTextColor(ContextCompat.getColor(context, android.R.color.holo_blue_light))
            typeface = android.graphics.Typeface.DEFAULT_BOLD
            
            layoutParams = LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(0, dpToPx(8), 0, dpToPx(4))
            }
        }
    }
    
    private fun createTwoColumnRow(
        leftLabel: String, leftValue: String,
        rightLabel: String, rightValue: String
    ): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            // Left column
            val leftColumn = createColumnItem(leftLabel, leftValue)
            leftColumn.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            )
            
            // Right column
            val rightColumn = createColumnItem(rightLabel, rightValue)
            rightColumn.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            ).apply {
                setMargins(dpToPx(8), 0, 0, 0)
            }
            
            addView(leftColumn)
            addView(rightColumn)
            
            layoutParams = LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(0, dpToPx(2), 0, dpToPx(2))
            }
        }
    }
    
    private fun createThreeColumnRow(
        leftLabel: String, leftValue: String,
        middleLabel: String, middleValue: String,
        rightLabel: String, rightValue: String
    ): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            // Left column
            val leftColumn = createColumnItem(leftLabel, leftValue)
            leftColumn.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            )
            
            // Middle column
            val middleColumn = createColumnItem(middleLabel, middleValue)
            middleColumn.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            ).apply {
                setMargins(dpToPx(4), 0, dpToPx(4), 0)
            }
            
            // Right column
            val rightColumn = createColumnItem(rightLabel, rightValue)
            rightColumn.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            )
            
            addView(leftColumn)
            addView(middleColumn)
            addView(rightColumn)
            
            layoutParams = LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(0, dpToPx(2), 0, dpToPx(2))
            }
        }
    }
    
    private fun createColumnItem(label: String, value: String): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.VERTICAL
            gravity = Gravity.START
            
            val labelView = TextView(context).apply {
                text = "$label:"
                setTextSize(TypedValue.COMPLEX_UNIT_SP, 9f)
                setTextColor(ContextCompat.getColor(context, android.R.color.darker_gray))
            }
            
            val valueView = TextView(context).apply {
                text = value
                setTextSize(TypedValue.COMPLEX_UNIT_SP, 11f)
                setTextColor(ContextCompat.getColor(context, android.R.color.white))
                typeface = android.graphics.Typeface.DEFAULT_BOLD
            }
            
            addView(labelView)
            addView(valueView)
        }
    }
    
    private fun createCheckboxRow(
        leftLabel: String, leftChecked: Boolean,
        rightLabel: String, rightChecked: Boolean
    ): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            // Left checkbox
            val leftCheckbox = createCheckboxItem(leftLabel, leftChecked)
            leftCheckbox.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            )
            
            // Right checkbox
            val rightCheckbox = createCheckboxItem(rightLabel, rightChecked)
            rightCheckbox.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            ).apply {
                setMargins(dpToPx(8), 0, 0, 0)
            }
            
            addView(leftCheckbox)
            addView(rightCheckbox)
            
            layoutParams = LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(0, dpToPx(2), 0, dpToPx(2))
            }
        }
    }
    
    private fun createCheckboxItem(label: String, checked: Boolean): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            // Checkbox symbol
            val checkboxView = TextView(context).apply {
                text = if (checked) "☑" else "☐"
                setTextSize(TypedValue.COMPLEX_UNIT_SP, 14f)
                setTextColor(
                    if (checked) ContextCompat.getColor(context, android.R.color.holo_green_light)
                    else ContextCompat.getColor(context, android.R.color.darker_gray)
                )
                layoutParams = LinearLayout.LayoutParams(
                    ViewGroup.LayoutParams.WRAP_CONTENT,
                    ViewGroup.LayoutParams.WRAP_CONTENT
                ).apply {
                    setMargins(0, 0, dpToPx(6), 0)
                }
            }
            
            // Label
            val labelView = TextView(context).apply {
                text = label
                setTextSize(TypedValue.COMPLEX_UNIT_SP, 11f)
                setTextColor(ContextCompat.getColor(context, android.R.color.white))
            }
            
            addView(checkboxView)
            addView(labelView)
        }
    }
    
    private fun createMixedRow(
        leftLabel: String, leftChecked: Boolean,
        rightLabel: String, rightValue: String
    ): LinearLayout
    {
        return LinearLayout(context).apply {
            orientation = LinearLayout.HORIZONTAL
            gravity = Gravity.CENTER_VERTICAL
            
            // Left checkbox
            val leftCheckbox = createCheckboxItem(leftLabel, leftChecked)
            leftCheckbox.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            )
            
            // Right text item
            val rightItem = createColumnItem(rightLabel, rightValue)
            rightItem.layoutParams = LinearLayout.LayoutParams(
                0,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                1f
            ).apply {
                setMargins(dpToPx(8), 0, 0, 0)
            }
            
            addView(leftCheckbox)
            addView(rightItem)
            
            layoutParams = LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT
            ).apply {
                setMargins(0, dpToPx(2), 0, dpToPx(2))
            }
        }
    }
    
    private fun createDrawerBackground(): GradientDrawable
    {
        return GradientDrawable().apply {
            setColor(ContextCompat.getColor(context, android.R.color.black))
            alpha = (0.9f * 255).toInt()
            cornerRadii = floatArrayOf(
                dpToPx(12).toFloat(), dpToPx(12).toFloat(), // top-left
                dpToPx(12).toFloat(), dpToPx(12).toFloat(), // top-right
                0f, 0f, // bottom-right
                0f, 0f  // bottom-left
            )
            setStroke(2, ContextCompat.getColor(context, android.R.color.darker_gray))
        }
    }
    
    private fun createCircularBackground(): GradientDrawable
    {
        return GradientDrawable().apply {
            setColor(ContextCompat.getColor(context, android.R.color.transparent))
            shape = GradientDrawable.OVAL
            setStroke(1, ContextCompat.getColor(context, android.R.color.darker_gray))
        }
    }
    
    private fun createExpandableSwipeTouchListener(): View.OnTouchListener
    {
        return View.OnTouchListener { view, event ->
            when (event.action)
            {
                MotionEvent.ACTION_DOWN ->
                {
                    isDragging = false
                    initialTouchY = event.rawY
                    initialTranslationY = view.translationY
                    true
                }
                
                MotionEvent.ACTION_MOVE ->
                {
                    val deltaY = event.rawY - initialTouchY
                    
                    if (!isDragging && abs(deltaY) > 20)
                    {
                        isDragging = true
                    }
                    
                    if (isDragging)
                    {
                        if (deltaY > 0)
                        {
                            // Downward drag - dismissing
                            view.translationY = initialTranslationY + deltaY
                        }
                        else if (deltaY < 0 && !isExpanded)
                        {
                            // Upward drag - expanding (only if not already expanded)
                            // Don't move the view, just track the gesture
                        }
                    }
                    true
                }
                
                MotionEvent.ACTION_UP ->
                {
                    if (isDragging)
                    {
                        val deltaY = event.rawY - initialTouchY
                        
                        if (deltaY > SWIPE_THRESHOLD && isExpanded)
                        {
                            // Only collapse to minimal state if expanded, never fully dismiss
                            collapseDrawer()
                            ObjectAnimator.ofFloat(view, "translationY", view.translationY, initialTranslationY).apply {
                                duration = 200L
                                interpolator = AccelerateDecelerateInterpolator()
                                start()
                            }
                        }
                        else if (deltaY < EXPAND_THRESHOLD && !isExpanded)
                        {
                            // Expand if swiped up enough
                            expandDrawer()
                        }
                        else if (deltaY > -EXPAND_THRESHOLD && isExpanded)
                        {
                            // Collapse if swiped down a bit while expanded
                            collapseDrawer()
                        }
                        else
                        {
                            // Snap back to current state
                            ObjectAnimator.ofFloat(view, "translationY", view.translationY, initialTranslationY).apply {
                                duration = 200L
                                interpolator = AccelerateDecelerateInterpolator()
                                start()
                            }
                        }
                    }
                    else
                    {
                        // Simple tap - toggle expand/collapse
                        if (isExpanded)
                        {
                            collapseDrawer()
                        }
                        else
                        {
                            expandDrawer()
                        }
                    }
                    
                    isDragging = false
                    true
                }
                
                else -> false
            }
        }
    }
    
    private fun expandDrawer()
    {
        if (isExpanded) return
        
        isExpanded = true
        
        // Show expanded content
        drawerContainer?.findViewWithTag<ScrollView>("expanded_content")?.let { expandedContent ->
            expandedContent.visibility = View.VISIBLE
            expandedContent.alpha = 0f
            
            ObjectAnimator.ofFloat(expandedContent, "alpha", 0f, 1f).apply {
                duration = SLIDE_ANIMATION_DURATION
                start()
            }
        }
        
        // Resize drawer window
        drawerParams?.let { params ->
            params.height = dpToPx(DRAWER_HEIGHT_EXPANDED_DP)
            drawerContainer?.let { container ->
                windowManager?.updateViewLayout(container, params)
            }
        }
        
        PGHLog.d(TAG, "Drawer expanded")
    }
    
    private fun collapseDrawer()
    {
        if (!isExpanded) return
        
        isExpanded = false
        
        // Hide expanded content
        drawerContainer?.findViewWithTag<ScrollView>("expanded_content")?.let { expandedContent ->
            ObjectAnimator.ofFloat(expandedContent, "alpha", 1f, 0f).apply {
                duration = SLIDE_ANIMATION_DURATION
                addListener(object : AnimatorListenerAdapter() {
                    override fun onAnimationEnd(animation: Animator) {
                        expandedContent.visibility = View.GONE
                    }
                })
                start()
            }
        }
        
        // Resize drawer window
        drawerParams?.let { params ->
            params.height = dpToPx(DRAWER_HEIGHT_COLLAPSED_DP)
            drawerContainer?.let { container ->
                windowManager?.updateViewLayout(container, params)
            }
        }
        
        PGHLog.d(TAG, "Drawer collapsed")
    }
    
    private fun animateIn()
    {
        drawerContainer?.let { container ->
            val screenHeight = getScreenSize().second
            container.translationY = dpToPx(DRAWER_HEIGHT_COLLAPSED_DP).toFloat()
            
            ObjectAnimator.ofFloat(container, "translationY", container.translationY, 0f).apply {
                duration = SLIDE_ANIMATION_DURATION
                interpolator = AccelerateDecelerateInterpolator()
                start()
            }
        }
    }
    
    private fun animateOut(onComplete: () -> Unit)
    {
        drawerContainer?.let { container ->
            val currentHeight = if (isExpanded) DRAWER_HEIGHT_EXPANDED_DP else DRAWER_HEIGHT_COLLAPSED_DP
            ObjectAnimator.ofFloat(container, "translationY", 0f, dpToPx(currentHeight).toFloat()).apply {
                duration = SLIDE_ANIMATION_DURATION
                interpolator = AccelerateDecelerateInterpolator()
                addListener(object : AnimatorListenerAdapter() {
                    override fun onAnimationEnd(animation: Animator) {
                        onComplete()
                    }
                })
                start()
            }
        }
    }
    
    private fun cleanup()
    {
        drawerContainer = null
        drawerParams = null
        windowManager = null
        currentDetectionResult = null
        isShowing = false
        isExpanded = false
    }
    
    private fun getScreenSize(): Pair<Int, Int>
    {
        val displayMetrics = context.resources.displayMetrics
        return Pair(displayMetrics.widthPixels, displayMetrics.heightPixels)
    }
    
    private fun dpToPx(dp: Int): Int
    {
        return TypedValue.applyDimension(
            TypedValue.COMPLEX_UNIT_DIP,
            dp.toFloat(),
            context.resources.displayMetrics
        ).toInt()
    }
}