3 files changed, 213 insertions, 0 deletions
diff --git a/internal/api/handlers.go b/internal/api/handlers.go
new file mode 100644
index 0000000..ae2e15c
--- /dev/null
+++ b/internal/api/handlers.go
@@ -0,0 +1,54 @@
+package api
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+
+	"vpnem/internal/rules"
+)
+
+type Handler struct {
+	store *rules.Store
+}
+
+func NewHandler(store *rules.Store) *Handler {
+	return &Handler{store: store}
+}
+
+func (h *Handler) Servers(w http.ResponseWriter, r *http.Request) {
+	servers, err := h.store.LoadServers()
+	if err != nil {
+		log.Printf("error loading servers: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, servers)
+}
+
+func (h *Handler) RuleSetManifest(w http.ResponseWriter, r *http.Request) {
+	manifest, err := h.store.LoadRuleSets()
+	if err != nil {
+		log.Printf("error loading rulesets: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, manifest)
+}
+
+func (h *Handler) Version(w http.ResponseWriter, r *http.Request) {
+	ver, err := h.store.LoadVersion()
+	if err != nil {
+		log.Printf("error loading version: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, ver)
+}
+
+func writeJSON(w http.ResponseWriter, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	if err := json.NewEncoder(w).Encode(v); err != nil {
+		log.Printf("error encoding json: %v", err)
+	}
+}
diff --git a/internal/api/handlers_test.go b/internal/api/handlers_test.go
new file mode 100644
index 0000000..942a249
--- /dev/null
+++ b/internal/api/handlers_test.go
@@ -0,0 +1,129 @@
+package api_test
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"vpnem/internal/api"
+	"vpnem/internal/models"
+	"vpnem/internal/rules"
+)
+
+func setupTestStore(t *testing.T) *rules.Store {
+	t.Helper()
+	dir := t.TempDir()
+
+	writeJSON(t, filepath.Join(dir, "servers.json"), models.ServersResponse{
+		Servers: []models.Server{
+			{Tag: "test-1", Region: "NL", Type: "socks", Server: "1.2.3.4", ServerPort: 1080},
+		},
+	})
+
+	writeJSON(t, filepath.Join(dir, "rulesets.json"), models.RuleSetManifest{
+		RuleSets: []models.RuleSet{
+			{Tag: "test-rules", Description: "test", URL: "https://example.com/test.srs", Format: "binary", Type: "domain"},
+		},
+	})
+
+	writeJSON(t, filepath.Join(dir, "version.json"), models.VersionResponse{
+		Version: "0.1.0", Changelog: "test",
+	})
+
+	os.MkdirAll(filepath.Join(dir, "rules"), 0o755)
+
+	return rules.NewStore(dir)
+}
+
+func writeJSON(t *testing.T, path string, v any) {
+	t.Helper()
+	data, err := json.MarshalIndent(v, "", "  ")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, data, 0o644); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestServersEndpoint(t *testing.T) {
+	store := setupTestStore(t)
+	router := api.NewRouter(store)
+
+	req := httptest.NewRequest("GET", "/api/v1/servers", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+
+	var resp models.ServersResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("invalid json: %v", err)
+	}
+	if len(resp.Servers) != 1 {
+		t.Fatalf("expected 1 server, got %d", len(resp.Servers))
+	}
+	if resp.Servers[0].Tag != "test-1" {
+		t.Errorf("expected tag test-1, got %s", resp.Servers[0].Tag)
+	}
+}
+
+func TestRuleSetManifestEndpoint(t *testing.T) {
+	store := setupTestStore(t)
+	router := api.NewRouter(store)
+
+	req := httptest.NewRequest("GET", "/api/v1/ruleset/manifest", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+
+	var resp models.RuleSetManifest
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("invalid json: %v", err)
+	}
+	if len(resp.RuleSets) != 1 {
+		t.Fatalf("expected 1 ruleset, got %d", len(resp.RuleSets))
+	}
+}
+
+func TestVersionEndpoint(t *testing.T) {
+	store := setupTestStore(t)
+	router := api.NewRouter(store)
+
+	req := httptest.NewRequest("GET", "/api/v1/version", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+
+	var resp models.VersionResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("invalid json: %v", err)
+	}
+	if resp.Version != "0.1.0" {
+		t.Errorf("expected version 0.1.0, got %s", resp.Version)
+	}
+}
+
+func TestMethodNotAllowed(t *testing.T) {
+	store := setupTestStore(t)
+	router := api.NewRouter(store)
+
+	req := httptest.NewRequest("POST", "/api/v1/servers", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code == http.StatusOK {
+		t.Fatal("POST should not return 200")
+	}
+}
diff --git a/internal/api/router.go b/internal/api/router.go
new file mode 100644
index 0000000..717236c
--- /dev/null
+++ b/internal/api/router.go
@@ -0,0 +1,30 @@
+package api
+
+import (
+	"net/http"
+
+	"vpnem/internal/rules"
+)
+
+func NewRouter(store *rules.Store) http.Handler {
+	h := NewHandler(store)
+	mux := http.NewServeMux()
+
+	mux.HandleFunc("GET /health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte(`{"status":"ok"}`))
+	})
+	mux.HandleFunc("GET /api/v1/servers", h.Servers)
+	mux.HandleFunc("GET /api/v1/ruleset/manifest", h.RuleSetManifest)
+	mux.HandleFunc("GET /api/v1/version", h.Version)
+
+	// Static file serving for .srs and .txt rule files
+	rulesFS := http.StripPrefix("/rules/", http.FileServer(http.Dir(store.RulesDir())))
+	mux.Handle("/rules/", rulesFS)
+
+	// Static file serving for client releases
+	releasesFS := http.StripPrefix("/releases/", http.FileServer(http.Dir(store.ReleasesDir())))
+	mux.Handle("/releases/", releasesFS)
+
+	return mux
+}