AppLauncherTest.kt

import java.util.Locale

data class AppInfo(val packageName: String, val label: String, val isSystem: Boolean)

class MockPackageManager(private val apps: List<AppInfo>) {
    fun getInstalledApplications(): List<AppInfo> = apps
    fun getApplicationLabel(app: AppInfo): String = app.label
}

fun findPackageNameFromAppName(pm: MockPackageManager, appName: String): String? {
    val packages = pm.getInstalledApplications()
    
    // Separate user apps from system apps
    val userApps = packages.filter { !it.isSystem }
    val systemApps = packages.filter { it.isSystem }
    
    println("Searching for '$appName'...")
    println("User Apps: ${userApps.map { it.label }}")
    println("System Apps: ${systemApps.map { it.label }}")

    // 1. Exact match in USER apps
    userApps.find { it.label.equals(appName, ignoreCase = true) }?.let {
        println("✅ Found exact match in USER apps: ${it.label}")
        return it.packageName
    }

    // 2. Exact match in SYSTEM apps
    systemApps.find { it.label.equals(appName, ignoreCase = true) }?.let {
        println("✅ Found exact match in SYSTEM apps: ${it.label}")
        return it.packageName
    }

    // 3. Partial match in USER apps
    val userMatches = userApps.filter { it.label.contains(appName, ignoreCase = true) }
    if (userMatches.isNotEmpty()) {
        val best = userMatches.minByOrNull { it.label.length }!!
        println("✅ Found partial match in USER apps: ${best.label}")
        return best.packageName
    }

    // 4. Partial match in SYSTEM apps
    systemApps.find { it.label.contains(appName, ignoreCase = true) }?.let {
        println("⚠️ Found partial match in SYSTEM apps: ${it.label}")
        return it.packageName
    }

    println("❌ Not found")
    return null
}

fun main() {
    val apps = listOf(
        AppInfo("com.instagram.android", "Instagram", false),
        AppInfo("com.android.settings.instagram", "Instagram Settings", true),
        AppInfo("com.whatsapp", "WhatsApp", false),
        AppInfo("com.android.settings", "Settings", true)
    )
    val pm = MockPackageManager(apps)

    println("--- Test 1: Search 'Instagram' ---")
    val pkg1 = findPackageNameFromAppName(pm, "Instagram")
    assert(pkg1 == "com.instagram.android") { "Failed Test 1" }

    println("\n--- Test 2: Search 'Settings' ---")
    val pkg2 = findPackageNameFromAppName(pm, "Settings")
    assert(pkg2 == "com.android.settings") { "Failed Test 2" }
    
    println("\n--- Test 3: Search 'Insta' (Partial) ---")
    val pkg3 = findPackageNameFromAppName(pm, "Insta")
    assert(pkg3 == "com.instagram.android") { "Failed Test 3" }
}