package builder

import (
	"context"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestNpmrcRendersRegistryAndTokenForTheScope(t *testing.T) {
	n := Npmrc{
		Scope:    "@novox",
		Registry: "https://forge.invalid/api/packages/novox/npm/",
		Token:    "a-token",
	}
	got, err := n.File()
	if err != nil {
		t.Fatalf("a complete credential did not render: %v", err)
	}
	if !strings.Contains(got, "@novox:registry=https://forge.invalid/api/packages/novox/npm/") {
		t.Fatalf("the scope's registry line is missing:\n%s", got)
	}
	// The auth line is keyed by the URL without its scheme, or npm never sends the token.
	if !strings.Contains(got, "//forge.invalid/api/packages/novox/npm/:_authToken=a-token") {
		t.Fatalf("the auth line does not match the registry key:\n%s", got)
	}
}

func TestNpmrcAddsATrailingSlashSoTheAuthKeyMatches(t *testing.T) {
	n := Npmrc{Scope: "@novox", Registry: "https://forge.invalid/api/packages/novox/npm", Token: "t"}
	got, err := n.File()
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(got, "registry=https://forge.invalid/api/packages/novox/npm/\n") {
		t.Fatalf("a missing trailing slash was not normalised:\n%s", got)
	}
}

func TestNpmrcRefusesTheHalfConfigured(t *testing.T) {
	cases := map[string]Npmrc{
		"scope without @":   {Scope: "novox", Registry: "https://x.invalid/", Token: "t"},
		"registry not http": {Scope: "@novox", Registry: "ftp://x.invalid/", Token: "t"},
		"no token":          {Scope: "@novox", Registry: "https://x.invalid/", Token: ""},
	}
	for name, n := range cases {
		if _, err := n.File(); err == nil {
			t.Fatalf("%s rendered an .npmrc rather than refusing", name)
		}
	}
}

func TestNpmrcDisabledUntilThereIsARegistry(t *testing.T) {
	if (Npmrc{}).Enabled() {
		t.Fatal("an empty credential reported itself usable")
	}
	if (Npmrc{Scope: "@novox"}).Enabled() {
		t.Fatal("a scope with no registry reported itself usable")
	}
	if !(Npmrc{Scope: "@novox", Registry: "https://x.invalid/"}).Enabled() {
		t.Fatal("a scope and a registry did not count as usable")
	}
}

// The credential reaches an image build as an .npmrc inside the build context — for a Dockerfile to
// COPY in a stage it does not publish — and the build runs on the host network so a RUN resolving the
// registry reaches it where the binding says (novox/hq ADR 0076). Not a buildkit secret, because this
// machine's docker may carry no buildx.
func TestAnImageBuildGetsTheCredentialInTheContextAndHostNetwork(t *testing.T) {
	r, workspace := aRepository(t, withBoth, map[string]string{"Dockerfile": "FROM scratch\nCOPY .npmrc ./", "files/x": "y"})
	n := Npmrc{Scope: "@novox", Registry: "https://forge.invalid/api/packages/novox/npm/", Token: "t"}
	if _, err := Build(context.Background(), r.run, r,
		"https://forge.invalid/meshboard.git", "", "", workspace, nil, n, nil); err != nil {
		t.Fatalf("the build failed: %v", err)
	}

	var build string
	for _, line := range r.ran {
		if strings.HasPrefix(line, "docker build") {
			build = line
		}
	}
	if build == "" {
		t.Fatal("no docker build ran")
	}
	if strings.Contains(build, "--secret") {
		t.Fatalf("the build used a buildkit secret, which this path avoids: %s", build)
	}
	if !strings.Contains(build, "--network host") {
		t.Fatalf("the build was not given the host network to reach the registry: %s", build)
	}
	// The .npmrc is written into the build context (the source tree), where a Dockerfile COPYs it.
	tree := filepath.Join(workspace, "source")
	npmrc := filepath.Join(tree, ".npmrc")
	if _, err := os.Stat(npmrc); err != nil {
		t.Fatalf("the credential was not written into the build context: %v", err)
	}
}

func TestAnImageBuildWithoutACredentialGetsNoHostNetwork(t *testing.T) {
	r, workspace := aRepository(t, withBoth, map[string]string{"Dockerfile": "FROM scratch", "files/x": "y"})
	if _, err := Build(context.Background(), r.run, r,
		"https://forge.invalid/meshboard.git", "", "", workspace, nil, Npmrc{}, nil); err != nil {
		t.Fatalf("the build failed: %v", err)
	}
	for _, line := range r.ran {
		if strings.HasPrefix(line, "docker build") && (strings.Contains(line, "--secret") || strings.Contains(line, "--network host")) {
			t.Fatalf("a build with no credential was still given build-network or a secret: %s", line)
		}
	}
	tree := filepath.Join(workspace, "source")
	if _, err := os.Stat(filepath.Join(tree, ".npmrc")); err == nil {
		t.Fatal("an .npmrc was written into a build that has no credential")
	}
}

const aPackage = `{"module":"mesh-sdk","version":"1",
  "build":{"artifacts":[{"name":"lib","kind":"package","language":"typescript"}]},
  "resources":[]}`

// A package is compiled on a public base and published to the mesh's package registry by version,
// with nothing pushed to the artifact store and the credential mounted, not baked (novox/hq ADR 0076).
func TestAPackageIsBuiltOnAPublicBaseAndPublishedByVersion(t *testing.T) {
	r, workspace := aRepository(t, aPackage, map[string]string{
		"package.json": `{"name":"@novox/mesh-sdk","version":"0.1.0"}`,
	})
	n := Npmrc{Scope: "@novox", Registry: "https://forge.invalid/api/packages/novox/npm/", Token: "t"}
	got, err := Build(context.Background(), r.run, r,
		"https://forge.invalid/mesh-sdk.git", "", "", workspace, nil, n, nil)
	if err != nil {
		t.Fatalf("the package did not build: %v", err)
	}
	if len(got.Built) != 1 || got.Built[0].Reference != "@novox/mesh-sdk@0.1.0" {
		t.Fatalf("a package is published by name and version, got %+v", got.Built)
	}
	if len(r.images) != 0 || len(r.archives) != 0 {
		t.Fatal("a package was pushed to the artifact store, which is not where packages live")
	}
	var ran string
	for _, line := range r.ran {
		if strings.HasPrefix(line, "docker run") {
			ran = line
		}
	}
	if ran == "" {
		t.Fatal("nothing ran to build the package")
	}
	if !strings.Contains(ran, "node:22-bookworm-slim") {
		t.Fatalf("a package was not built on a public base: %s", ran)
	}
	if !strings.Contains(ran, ":/root/.npmrc:ro") {
		t.Fatalf("the credential was not mounted read-only for the publish: %s", ran)
	}
}

func TestAPackageWithNoRegistryIsRefused(t *testing.T) {
	r, workspace := aRepository(t, aPackage, map[string]string{
		"package.json": `{"name":"@novox/mesh-sdk","version":"0.1.0"}`,
	})
	_, err := Build(context.Background(), r.run, r,
		"https://forge.invalid/mesh-sdk.git", "", "", workspace, nil, Npmrc{}, nil)
	if err == nil {
		t.Fatal("a package built with no registry to publish to, silently")
	}
}

func TestNpmrcRendersBasicAuthWhenGivenAUserAndPassword(t *testing.T) {
	n := Npmrc{
		Scope:    "@novox",
		Registry: "http://forge.invalid:3000/api/packages/novox/npm/",
		Username: "mesh_anchor_builder",
		Password: "s3cret",
	}
	got, err := n.File()
	if err != nil {
		t.Fatalf("basic-auth credential did not render: %v", err)
	}
	key := "//forge.invalid:3000/api/packages/novox/npm/"
	if !strings.Contains(got, key+":username=mesh_anchor_builder\n") {
		t.Fatalf("username line missing:\n%s", got)
	}
	// npm reads the password base64-encoded.
	if !strings.Contains(got, key+":_password=czNjcmV0\n") {
		t.Fatalf("base64 password line missing or wrong:\n%s", got)
	}
	if !strings.Contains(got, key+":always-auth=true\n") {
		t.Fatalf("always-auth missing, so reads would go unauthenticated:\n%s", got)
	}
	if strings.Contains(got, "_authToken") {
		t.Fatalf("a token line was rendered for a basic-auth credential:\n%s", got)
	}
}

func TestNpmrcRefusesWhenGivenNeitherTokenNorPassword(t *testing.T) {
	n := Npmrc{Scope: "@novox", Registry: "http://x.invalid/npm/", Username: "u"}
	if _, err := n.File(); err == nil {
		t.Fatal("a username with no password rendered an .npmrc")
	}
}

func TestAnImageThatDoesNotAskForTheCredentialDoesNotGetIt(t *testing.T) {
	// A Dockerfile with no .npmrc reference (like the control plane's) must build clean: no .npmrc
	// in its context, no host network — so its image stays deterministic and the credential does not
	// leak into a build that never resolves a mesh package.
	r, workspace := aRepository(t, withBoth, map[string]string{"Dockerfile": "FROM scratch\nCOPY . .", "files/x": "y"})
	n := Npmrc{Scope: "@novox", Registry: "https://forge.invalid/api/packages/novox/npm/", Token: "t"}
	if _, err := Build(context.Background(), r.run, r,
		"https://forge.invalid/meshboard.git", "", "", workspace, nil, n, nil); err != nil {
		t.Fatalf("the build failed: %v", err)
	}
	for _, line := range r.ran {
		if strings.HasPrefix(line, "docker build") && strings.Contains(line, "--network host") {
			t.Fatalf("a build that does not ask for the credential got the host network: %s", line)
		}
	}
	if _, err := os.Stat(filepath.Join(workspace, "source", ".npmrc")); err == nil {
		t.Fatal("an .npmrc was written into a build that does not reference it")
	}
}