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path: root/internal/api/handlers_test.go
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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")
	}
}