package main

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

func TestDefaultScanTargetDirUsesCWDPlugin(t *testing.T) {
	cwd := t.TempDir()
	pluginMod := filepath.Join(cwd, "plugin.mod")
	if err := os.WriteFile(pluginMod, []byte("[plugin]\nname = \"example\"\nversion = \"1.0.0\"\n"), 0644); err != nil {
		t.Fatalf("write plugin.mod: %v", err)
	}

	got := defaultScanTargetDir(".", nil, cwd)
	if got != cwd {
		t.Fatalf("defaultScanTargetDir() = %q, want %q", got, cwd)
	}
}

func TestDefaultScanTargetDirFallsBackToCoreBackend(t *testing.T) {
	cwd := t.TempDir()

	got := defaultScanTargetDir(".", nil, cwd)
	want := filepath.Join(blockNinjaRepoRoot(), "backend")
	if got != want {
		t.Fatalf("defaultScanTargetDir() = %q, want %q", got, want)
	}
}

func TestShouldIncludeCoreTargetsUsesBackendPathAsToolHostForPluginScans(t *testing.T) {
	targetDir := filepath.Join(blockNinjaRepoRoot(), "backend")
	if !shouldIncludeCoreTargets(targetDir, targetDir, nil, nil) {
		t.Fatalf("expected core targets to be included when no plugin flags are present")
	}

	if shouldIncludeCoreTargets(targetDir, targetDir, []string{"/tmp/plugin"}, nil) {
		t.Fatalf("expected core targets to be skipped when plugin roots are passed with the checker backend path")
	}

	if shouldIncludeCoreTargets(targetDir, targetDir, nil, []string{"/tmp/plugin/web/src"}) {
		t.Fatalf("expected core targets to be skipped when plugin pages are passed with the checker backend path")
	}
}

func TestCollectTargetsSkipsCoreWhenIncludeCoreTargetsFalse(t *testing.T) {
	repoRoot := t.TempDir()
	backendDir := filepath.Join(repoRoot, "backend")
	pluginFrontendDir := filepath.Join(repoRoot, "plugins", "example", "web", "src")

	for _, dir := range []string{backendDir, pluginFrontendDir} {
		if err := os.MkdirAll(dir, 0755); err != nil {
			t.Fatalf("mkdir %s: %v", dir, err)
		}
	}

	if targets := collectBackendScanTargets(repoRoot, backendDir, false); len(targets) != 0 {
		t.Fatalf("collectBackendScanTargets(..., false) returned %d targets, want 0", len(targets))
	}

	frontendTargets := collectFrontendScanTargets(repoRoot, backendDir, []pluginScanTarget{{
		root:          filepath.Join(repoRoot, "plugins", "example"),
		frontendDir:   pluginFrontendDir,
		display:       "plugins/example",
		frontendLabel: "plugins/example/web/src",
	}}, false)

	if len(frontendTargets) != 1 {
		t.Fatalf("collectFrontendScanTargets(..., false) returned %d targets, want 1", len(frontendTargets))
	}
	if frontendTargets[0].dir != pluginFrontendDir {
		t.Fatalf("frontend target dir = %q, want %q", frontendTargets[0].dir, pluginFrontendDir)
	}
	if !frontendTargets[0].pluginRules {
		t.Fatalf("frontend target pluginRules = false, want true")
	}
	if !frontendTargets[0].managedConfigs {
		t.Fatalf("frontend target managedConfigs = false, want true")
	}
}

func TestResolveScanRootsDetectsConsolidatedBackendDir(t *testing.T) {
	repoRoot := t.TempDir()
	backendDir := filepath.Join(repoRoot, "backend")
	protoDir := filepath.Join(repoRoot, "proto")

	for _, dir := range []string{backendDir, protoDir} {
		if err := os.MkdirAll(dir, 0755); err != nil {
			t.Fatalf("mkdir %s: %v", dir, err)
		}
	}
	if err := os.WriteFile(filepath.Join(backendDir, "go.mod"), []byte("module example.com/cms/backend\n"), 0644); err != nil {
		t.Fatalf("write go.mod: %v", err)
	}
	if err := os.WriteFile(filepath.Join(repoRoot, "buf.yaml"), []byte("version: v2\n"), 0644); err != nil {
		t.Fatalf("write buf.yaml: %v", err)
	}

	gotBackend, gotRepo, err := resolveScanRoots(backendDir)
	if err != nil {
		t.Fatalf("resolveScanRoots() error = %v", err)
	}
	if gotBackend != backendDir {
		t.Fatalf("backendDir = %q, want %q", gotBackend, backendDir)
	}
	if gotRepo != repoRoot {
		t.Fatalf("repoRoot = %q, want %q", gotRepo, repoRoot)
	}
}

func TestDiscoverOrchestratorTestTargetsRequiresCoreScan(t *testing.T) {
	repoRoot := blockNinjaRepoRoot()
	backendDir := filepath.Join(repoRoot, "backend")

	if targets := discoverOrchestratorTestTargets(repoRoot, backendDir, false); len(targets) != 0 {
		t.Fatalf("discoverOrchestratorTestTargets(..., false) returned %d targets, want 0", len(targets))
	}

	pluginRoot := filepath.Join(t.TempDir(), "plugin")
	if targets := discoverOrchestratorTestTargets(pluginRoot, pluginRoot, true); len(targets) != 0 {
		t.Fatalf("discoverOrchestratorTestTargets(plugin root) returned %d targets, want 0", len(targets))
	}
}

func TestDiscoverOrchestratorTestTargetsFromRoot(t *testing.T) {
	root := t.TempDir()
	backendDir := filepath.Join(root, "backend")
	if err := os.MkdirAll(backendDir, 0755); err != nil {
		t.Fatalf("mkdir backend: %v", err)
	}

	if targets := discoverOrchestratorTestTargetsFromRoot(root); len(targets) != 0 {
		t.Fatalf("targets without go.mod = %d, want 0", len(targets))
	}

	if err := os.WriteFile(filepath.Join(backendDir, "go.mod"), []byte("module example.com/orchestrator\n"), 0644); err != nil {
		t.Fatalf("write go.mod: %v", err)
	}

	targets := discoverOrchestratorTestTargetsFromRoot(root)
	if len(targets) != 1 {
		t.Fatalf("targets = %d, want 1", len(targets))
	}
	if targets[0].label != "orchestrator/backend" {
		t.Fatalf("label = %q, want orchestrator/backend", targets[0].label)
	}
	if targets[0].moduleRoot != backendDir {
		t.Fatalf("moduleRoot = %q, want %q", targets[0].moduleRoot, backendDir)
	}
	if got := strings.Join(targets[0].args, " "); got != "test ./..." {
		t.Fatalf("args = %q, want test ./...", got)
	}
}

func TestResolvePluginTargetsUsesRootFolderNameForDisplay(t *testing.T) {
	repoRoot := t.TempDir()
	pluginRoot := filepath.Join(t.TempDir(), "messenger")
	pluginFrontend := filepath.Join(pluginRoot, "web")
	for _, dir := range []string{pluginRoot, pluginFrontend} {
		if err := os.MkdirAll(dir, 0755); err != nil {
			t.Fatalf("mkdir %s: %v", dir, err)
		}
	}
	if err := os.WriteFile(filepath.Join(pluginFrontend, "index.tsx"), []byte("export const x = 1\n"), 0644); err != nil {
		t.Fatalf("write frontend file: %v", err)
	}

	targets, unresolved := resolvePluginTargets(repoRoot, []string{pluginRoot})
	if len(unresolved) != 0 {
		t.Fatalf("unresolved = %v, want none", unresolved)
	}
	if len(targets) != 1 {
		t.Fatalf("targets = %d, want 1", len(targets))
	}
	if targets[0].display != "messenger" {
		t.Fatalf("display = %q, want messenger", targets[0].display)
	}
	if targets[0].frontendLabel != "messenger" {
		t.Fatalf("frontendLabel = %q, want messenger", targets[0].frontendLabel)
	}
}

func TestExtractRBACMethodRolesParsesRoleValues(t *testing.T) {
	dir := t.TempDir()
	file := filepath.Join(dir, "interceptor.go")
	if err := os.WriteFile(file, []byte(`package rbac

type Role string

const (
	RoleViewer Role = "viewer"
	RoleAdmin Role = "admin"
)

var MethodRoles = map[string]Role{
	"/example.v1.Service/Public": "",
	"/example.v1.Service/View": RoleViewer,
	"/example.v1.Service/Admin": RoleAdmin,
}
`), 0644); err != nil {
		t.Fatalf("write interceptor.go: %v", err)
	}

	methods, err := extractRBACMethodRoles(file)
	if err != nil {
		t.Fatalf("extractRBACMethodRoles() error = %v", err)
	}

	if methods["/example.v1.Service/Public"] != "public" {
		t.Fatalf("public role = %q, want public", methods["/example.v1.Service/Public"])
	}
	if methods["/example.v1.Service/View"] != "viewer" {
		t.Fatalf("viewer role = %q, want viewer", methods["/example.v1.Service/View"])
	}
	if methods["/example.v1.Service/Admin"] != "admin" {
		t.Fatalf("admin role = %q, want admin", methods["/example.v1.Service/Admin"])
	}
}

func TestExtractRBACMethodRolesParsesSeedTable(t *testing.T) {
	// The CMS renamed the static RBAC table to methodRolesSeed, kept behind an
	// atomic-pointer copy-on-write live table for thread safety. The extractor must
	// recognise methodRolesSeed as well as MethodRoles, or every CMS RPC reads as
	// "missing RBAC entry".
	dir := t.TempDir()
	file := filepath.Join(dir, "interceptor.go")
	if err := os.WriteFile(file, []byte(`package rbac

type Role string

const (
	RoleAdmin Role = "admin"
)

var methodRolesSeed = map[string]Role{
	"/example.v1.Service/Public": "",
	"/example.v1.Service/Admin":  RoleAdmin,
}
`), 0644); err != nil {
		t.Fatalf("write interceptor.go: %v", err)
	}

	methods, err := extractRBACMethodRoles(file)
	if err != nil {
		t.Fatalf("extractRBACMethodRoles() error = %v", err)
	}

	if methods["/example.v1.Service/Public"] != "public" {
		t.Fatalf("public role = %q, want public", methods["/example.v1.Service/Public"])
	}
	if methods["/example.v1.Service/Admin"] != "admin" {
		t.Fatalf("admin role = %q, want admin", methods["/example.v1.Service/Admin"])
	}
}