1 files changed, 146 insertions, 0 deletions

diff --git a/internal/state/state.go b/internal/state/state.go
new file mode 100644
index 0000000..c7c7dd4
--- /dev/null
+++ b/internal/state/state.go
@@ -0,0 +1,146 @@
+package state
+
+import (
+        "encoding/json"
+        "fmt"
+        "os"
+        "path/filepath"
+)
+
+// State represents the entire local deployment state
+type State struct {
+        Hosts map[string]*Host `json:"hosts"`
+}
+
+// Host represents deployment state for a single VPS
+type Host struct {
+        NextPort int             `json:"next_port"`
+        Apps     map[string]*App `json:"apps"`
+}
+
+// App represents a deployed application or static site
+type App struct {
+        Type   string            `json:"type"` // "app" or "static"
+        Domain string            `json:"domain"`
+        Port   int               `json:"port,omitempty"` // only for type="app"
+        Env    map[string]string `json:"env,omitempty"`  // only for type="app"
+}
+
+const (
+        startPort = 8001
+)
+
+// Load reads state from ~/.config/deploy/state.json
+func Load() (*State, error) {
+        path := statePath()
+
+        // If file doesn't exist, return empty state
+        if _, err := os.Stat(path); os.IsNotExist(err) {
+                return &State{
+                        Hosts: make(map[string]*Host),
+                }, nil
+        }
+
+        data, err := os.ReadFile(path)
+        if err != nil {
+                return nil, fmt.Errorf("failed to read state file: %w", err)
+        }
+
+        var state State
+        if err := json.Unmarshal(data, &state); err != nil {
+                return nil, fmt.Errorf("failed to parse state file: %w", err)
+        }
+
+        // Initialize maps if nil
+        if state.Hosts == nil {
+                state.Hosts = make(map[string]*Host)
+        }
+
+        return &state, nil
+}
+
+// Save writes state to ~/.config/deploy/state.json
+func (s *State) Save() error {
+        path := statePath()
+
+        // Ensure directory exists
+        dir := filepath.Dir(path)
+        if err := os.MkdirAll(dir, 0755); err != nil {
+                return fmt.Errorf("failed to create config directory: %w", err)
+        }
+
+        data, err := json.MarshalIndent(s, "", "  ")
+        if err != nil {
+                return fmt.Errorf("failed to marshal state: %w", err)
+        }
+
+        if err := os.WriteFile(path, data, 0600); err != nil {
+                return fmt.Errorf("failed to write state file: %w", err)
+        }
+
+        return nil
+}
+
+// GetHost returns the host state, creating it if it doesn't exist
+func (s *State) GetHost(host string) *Host {
+        if s.Hosts[host] == nil {
+                s.Hosts[host] = &Host{
+                        NextPort: startPort,
+                        Apps:     make(map[string]*App),
+                }
+        }
+        if s.Hosts[host].Apps == nil {
+                s.Hosts[host].Apps = make(map[string]*App)
+        }
+        return s.Hosts[host]
+}
+
+// AllocatePort returns the next available port for a host
+func (s *State) AllocatePort(host string) int {
+        h := s.GetHost(host)
+        port := h.NextPort
+        h.NextPort++
+        return port
+}
+
+// AddApp adds or updates an app in the state
+func (s *State) AddApp(host, name string, app *App) {
+        h := s.GetHost(host)
+        h.Apps[name] = app
+}
+
+// RemoveApp removes an app from the state
+func (s *State) RemoveApp(host, name string) error {
+        h := s.GetHost(host)
+        if _, exists := h.Apps[name]; !exists {
+                return fmt.Errorf("app %s not found", name)
+        }
+        delete(h.Apps, name)
+        return nil
+}
+
+// GetApp returns an app from the state
+func (s *State) GetApp(host, name string) (*App, error) {
+        h := s.GetHost(host)
+        app, exists := h.Apps[name]
+        if !exists {
+                return nil, fmt.Errorf("app %s not found", name)
+        }
+        return app, nil
+}
+
+// ListApps returns all apps for a host
+func (s *State) ListApps(host string) map[string]*App {
+        h := s.GetHost(host)
+        return h.Apps
+}
+
+// statePath returns the path to the state file
+func statePath() string {
+        home, err := os.UserHomeDir()
+        if err != nil {
+                // Fallback to current directory (should rarely happen)
+                return ".deploy-state.json"
+        }
+        return filepath.Join(home, ".config", "deploy", "state.json")
+}