package builder

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

	"github.com/novox/mesh-controller/internal/beside"
	"github.com/novox/mesh-controller/internal/catalogue"
)

// **A build that needs the registry fails loudly while the build agent has none** (novox/hq ADR 0336
// §5, §6, issue 121). On a holder with neither the npm-package-registry binding nor the genesis
// document, a `package` artifact, an image whose Dockerfile names .npmrc and a TypeScript artifact
// with an `@novox/` dependency each fail before anything is built or published, naming the machine,
// the unbound requirement and the module that provides it. A Go artifact, and an image that does not
// name .npmrc, build there as before.
func TestABuildNeedingTheRegistryIsRefusedOnAnAgentWithoutOne(t *testing.T) {
	none := Npmrc{Machine: "workstation"}
	cases := map[string]struct {
		manifest string
		files    map[string]string
		held     map[string]string
	}{
		"a package": {aPackage, map[string]string{"package.json": `{"name":"@novox/mesh-sdk","version":"0.1.0"}`}, nil},
		"an image naming .npmrc": {withBoth, map[string]string{
			"Dockerfile": "FROM scratch\nCOPY .npmrc /root/.npmrc\n", "files/x": "y"}, nil},
		"a TypeScript bundle depending on the SDK": {aBundle, map[string]string{
			"index.ts": "console.log(1)", "package.json": `{"dependencies":{"@novox/mesh-sdk":"^0.1.0"}}`},
			map[string]string{"mesh-tools/build": "registry.invalid/mesh-tools/build@sha256:" + strings.Repeat("b", 64)}},
	}
	for name, c := range cases {
		t.Run(name, func(t *testing.T) {
			r, workspace := aRepository(t, c.manifest, c.files)
			var said []string
			_, err := Build(context.Background(), compiling{r}.run, r,
				"https://forge.invalid/m.git", "", "", workspace, c.held, none, GitCredential{},
				func(step, message string) { said = append(said, step+": "+message) })
			if err == nil {
				t.Fatal("built with no package registry")
			}
			for _, want := range []string{"workstation", "npm-package-registry", "unbound", "gitea"} {
				if !strings.Contains(err.Error(), want) {
					t.Errorf("the refusal does not say %q: %v", want, err)
				}
			}
			for _, line := range r.ran {
				if strings.HasPrefix(line, "docker build") || strings.HasPrefix(line, "docker run") ||
					strings.HasPrefix(line, "docker pull") {
					t.Errorf("something was built after the refusal: %s", line)
				}
			}
			if len(r.images) != 0 || len(r.archives) != 0 {
				t.Errorf("something was published after the refusal: %v %v", r.images, r.archives)
			}
			if !strings.Contains(strings.Join(said, "\n"), "REFUSED") {
				t.Errorf("the build's log does not say it was refused:\n%s", strings.Join(said, "\n"))
			}
		})
	}

	// A Go artifact builds on the same agent.
	files := aSharedRepository("one", "1")
	manifest := `{"module":"ctl","version":"1","build":{"artifacts":[
	  {"name":"controller","kind":"bundle","language":"go","system":"arch","from":"cmd/ctl","binary":"ctl"}]},
	  "resources":[{"id":"controller","type":"process","name":"ctl","artifact":"controller","run":["./ctl"]}]}`
	r := &recorded{contents: map[string]string{ManifestName: manifest}}
	for k, v := range files {
		r.contents[k] = v
	}
	held := map[string]string{"mesh-tools-go/build": "registry.invalid/mesh-tools-go/build@sha256:" + strings.Repeat("b", 64)}
	if _, err := Build(context.Background(), onTrunk{recorded: r}.run, r,
		"https://forge.invalid/ctl.git", "", "", t.TempDir(), held, none, GitCredential{}, nil); err != nil {
		t.Fatalf("a Go artifact did not build on an agent without the registry: %v", err)
	}
	// And an image that does not name .npmrc.
	r, workspace := aRepository(t, withBoth, map[string]string{"Dockerfile": "FROM scratch\nCOPY . .", "files/x": "y"})
	if _, err := Build(context.Background(), r.run, r,
		"https://forge.invalid/meshboard.git", "", "", workspace, nil, none, GitCredential{}, nil); err != nil {
		t.Fatalf("an image not naming .npmrc did not build on an agent without the registry: %v", err)
	}
}

// **The build's log says which registry it resolved from** (novox/hq ADR 0336 §4).
func TestABuildSaysWhichRegistryItResolvedFrom(t *testing.T) {
	for _, from := range []string{FromBinding, FromGenesis} {
		r, workspace := aRepository(t, aPackage, map[string]string{
			"package.json": `{"name":"@novox/mesh-sdk","version":"0.1.0"}`,
		})
		n := Npmrc{Scope: "@novox", Registry: "http://127.0.0.1:3000/api/packages/novox/npm/",
			Username: "mesh-builder", Password: "p", From: from, Machine: "anchor"}
		var said []string
		if _, err := Build(context.Background(), r.run, r, "https://forge.invalid/mesh-sdk.git", "", "",
			workspace, nil, n, GitCredential{}, func(step, message string) { said = append(said, step+": "+message) }); err != nil {
			t.Fatalf("%s: %v", from, err)
		}
		if !strings.Contains(strings.Join(said, "\n"), "from "+from) {
			t.Errorf("the log does not say the registry came from %s:\n%s", from, strings.Join(said, "\n"))
		}
	}
}

// The refusal names the module that provides the registry; it is the catalogue's provider.
func TestTheRegistryABuildIsRefusedForNamesItsProvider(t *testing.T) {
	raw, err := os.ReadFile(filepath.Join(beside.Catalogue(t), RegistryProvider, "module.json"))
	if err != nil {
		t.Fatal(err)
	}
	forge, err := catalogue.ParseManifest(raw)
	if err != nil {
		t.Fatal(err)
	}
	provides := false
	for _, p := range forge.Provides {
		provides = provides || p.Name == RegistryRequirement
	}
	if !provides {
		t.Fatalf("%s does not provide %s, which a refused build names it for", RegistryProvider, RegistryRequirement)
	}
}