package com.jovan.assistant.service

import android.accessibilityservice.AccessibilityService
import android.content.Intent
import android.os.Build
import android.view.accessibility.AccessibilityEvent
import com.jovan.assistant.data.AssistantState

/**
 * Executes system-level actions. Declared with canRetrieveWindowContent=false, so it cannot read the screen.
 * The user must enable it manually: Settings > Accessibility > AI Voice Assistant.
 */
class AssistantAccessibilityService : AccessibilityService() {

    override fun onServiceConnected() {
        super.onServiceConnected()
        instance = this
        AssistantState.accessibilityConnected.value = true
    }

    override fun onAccessibilityEvent(event: AccessibilityEvent?) { /* intentionally ignored */ }

    override fun onInterrupt() {}

    override fun onUnbind(intent: Intent?): Boolean {
        instance = null
        AssistantState.accessibilityConnected.value = false
        return super.onUnbind(intent)
    }

    fun lockScreen(): Boolean =
        Build.VERSION.SDK_INT >= Build.VERSION_CODES.P && performGlobalAction(GLOBAL_ACTION_LOCK_SCREEN)

    fun goHome() = performGlobalAction(GLOBAL_ACTION_HOME)
    fun goBack() = performGlobalAction(GLOBAL_ACTION_BACK)
    fun showRecents() = performGlobalAction(GLOBAL_ACTION_RECENTS)
    fun showNotifications() = performGlobalAction(GLOBAL_ACTION_NOTIFICATIONS)
    fun showQuickSettings() = performGlobalAction(GLOBAL_ACTION_QUICK_SETTINGS)
    fun screenshot(): Boolean =
        Build.VERSION.SDK_INT >= Build.VERSION_CODES.P && performGlobalAction(GLOBAL_ACTION_TAKE_SCREENSHOT)

    fun launch(intent: Intent): Boolean = try {
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
        startActivity(intent)
        true
    } catch (e: Exception) {
        false
    }

    companion object {
        @Volatile
        var instance: AssistantAccessibilityService? = null
    }
}