feat(connect): saved connection profiles support (#107) (#191)

* feat(#107): implement saved connection profiles support

* fix(connect): fallback profiles resolution and stubbing in tests

app/src/main/java/com/m57/hermescontrol/data/local/AuthManager.kt

@@ -26,6 +26,8 @@ object AuthManager {
     private const val KEY_BOTTOM_NAV_ITEMS = "bottom_nav_items"
     private const val KEY_TYPING_EFFECT_ENABLED = "typing_effect_enabled"
     private const val KEY_TYPING_EFFECT_DELAY_MS = "typing_effect_delay_ms"
+    private const val KEY_CONNECTION_PROFILES = "connection_profiles"
+    private const val KEY_SELECTED_PROFILE_ID = "selected_profile_id"
 
     private const val DEFAULT_HOST = "127.0.0.1"
     private const val DEFAULT_PORT = 9119
@@ -39,6 +41,8 @@ object AuthManager {
     private val _bottomNavItemsFlow = MutableStateFlow<List<String>>(emptyList())
     val bottomNavItemsFlow: StateFlow<List<String>> = _bottomNavItemsFlow.asStateFlow()
 
+    private val gson = com.google.gson.Gson()
+
     /**
      * Initialise the encrypted preferences.
      * Call this once from Application.onCreate() or MainActivity.onCreate().
@@ -71,28 +75,112 @@ object AuthManager {
             "AuthManager not initialised – call AuthManager.init(context) first",
         )
 
+    // ── Connection Profiles ──────────────────────────────────────────────
+
+    fun getConnectionProfiles(): List<com.m57.hermescontrol.data.model.ConnectionProfile> {
+        val json = requirePrefs().getString(KEY_CONNECTION_PROFILES, null) ?: return emptyList()
+        return try {
+            val type =
+                object : com.google.gson.reflect.TypeToken<
+                    List<com.m57.hermescontrol.data.model.ConnectionProfile>,
+                >() {}.type
+            gson.fromJson(json, type) ?: emptyList()
+        } catch (e: Exception) {
+            emptyList()
+        }
+    }
+
+    fun saveConnectionProfiles(profiles: List<com.m57.hermescontrol.data.model.ConnectionProfile>) {
+        val json = gson.toJson(profiles)
+        requirePrefs().edit().putString(KEY_CONNECTION_PROFILES, json).apply()
+    }
+
+    fun getProfileToken(profileId: String): String? {
+        return requirePrefs().getString("token_$profileId", null)
+    }
+
+    fun setProfileToken(
+        profileId: String,
+        token: String?,
+    ) {
+        requirePrefs().edit().putString("token_$profileId", token).apply()
+    }
+
+    fun getSelectedProfileId(): String? {
+        val id = requirePrefs().getString(KEY_SELECTED_PROFILE_ID, null)
+        return if (id.isNullOrBlank()) null else id
+    }
+
+    fun setSelectedProfileId(id: String?) {
+        requirePrefs().edit().putString(KEY_SELECTED_PROFILE_ID, id).apply()
+    }
+
     // ── Token ────────────────────────────────────────────────────────────
 
-    fun getToken(): String? = requirePrefs().getString(KEY_TOKEN, null)
+    fun getToken(): String? {
+        val selectedId = getSelectedProfileId()
+        if (selectedId != null) {
+            val token = getProfileToken(selectedId)
+            if (token != null) return token
+        }
+        return requirePrefs().getString(KEY_TOKEN, null)
+    }
 
     fun setToken(token: String?) {
-        requirePrefs().edit().putString(KEY_TOKEN, token).apply()
+        val selectedId = getSelectedProfileId()
+        if (selectedId != null) {
+            setProfileToken(selectedId, token)
+        } else {
+            requirePrefs().edit().putString(KEY_TOKEN, token).apply()
+        }
     }
 
     // ── Host ─────────────────────────────────────────────────────────────
 
-    fun getHost(): String = requirePrefs().getString(KEY_HOST, DEFAULT_HOST) ?: DEFAULT_HOST
+    fun getHost(): String {
+        val selectedId = getSelectedProfileId()
+        if (selectedId != null) {
+            val profile = getConnectionProfiles().firstOrNull { it.id == selectedId }
+            if (profile != null) return profile.host
+        }
+        return requirePrefs().getString(KEY_HOST, DEFAULT_HOST) ?: DEFAULT_HOST
+    }
 
     fun setHost(host: String) {
-        requirePrefs().edit().putString(KEY_HOST, host).apply()
+        val selectedId = getSelectedProfileId()
+        if (selectedId != null) {
+            val profiles =
+                getConnectionProfiles().map {
+                    if (it.id == selectedId) it.copy(host = host) else it
+                }
+            saveConnectionProfiles(profiles)
+        } else {
+            requirePrefs().edit().putString(KEY_HOST, host).apply()
+        }
     }
 
     // ── Port ─────────────────────────────────────────────────────────────
 
-    fun getPort(): Int = requirePrefs().getInt(KEY_PORT, DEFAULT_PORT)
+    fun getPort(): Int {
+        val selectedId = getSelectedProfileId()
+        if (selectedId != null) {
+            val profile = getConnectionProfiles().firstOrNull { it.id == selectedId }
+            if (profile != null) return profile.port
+        }
+        return requirePrefs().getInt(KEY_PORT, DEFAULT_PORT)
+    }
 
     fun setPort(port: Int) {
-        requirePrefs().edit().putInt(KEY_PORT, port).apply()
+        val selectedId = getSelectedProfileId()
+        if (selectedId != null) {
+            val profiles =
+                getConnectionProfiles().map {
+                    if (it.id == selectedId) it.copy(port = port) else it
+                }
+            saveConnectionProfiles(profiles)
+        } else {
+            requirePrefs().edit().putInt(KEY_PORT, port).apply()
+        }
     }
 
     // ── Auto-reconnect ───────────────────────────────────────────────────

app/src/main/java/com/m57/hermescontrol/data/model/ConnectionProfile.kt

@@ -0,0 +1,10 @@
+package com.m57.hermescontrol.data.model
+
+import java.util.UUID
+
+data class ConnectionProfile(
+    val id: String = UUID.randomUUID().toString(),
+    val name: String,
+    val host: String,
+    val port: Int,
+)