package releasekit_test

import (
	"errors"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"

	releasekit "gitea.maximumdirect.net/eric/ReleaseKit"
)

func TestSourceOperationsRejectUnavailableNoteWithoutTransport(t *testing.T) {
	source := newPublishFixture(t)
	repository := newFilteredSparseCheckout(t, source.work, "/go.mod", "/fixture_test.go")
	commit := gitText(t, repository, "rev-parse", "HEAD")
	noteObject := gitText(t, repository, "rev-parse", "HEAD:docs/releases/v1.2.3.md")
	before := gitText(t, repository, "cat-file", "--batch-all-objects", "--batch-check=%(objectname)")
	if strings.Contains(before, noteObject) {
		t.Fatal("fixture already contains the release note blob")
	}
	buildGit(t, repository, "tag", "v1.2.3")
	attempts := forbidInspectionTransport(t, repository)
	checked, checkErr := releasekit.Check(t.Context(), releasekit.ReleaseRequest{
		RepositoryDir: repository, Product: "Sample App", Version: "v1.2.3",
	})
	server, remote := newFacadeDeliveryServer(t, repository)
	defer server.Close()
	delivered, deliveryErr := releasekit.Deliver(t.Context(), releasekit.DeliveryRequest{
		RepositoryDir: repository, Product: "Sample App", Version: "v1.2.3",
		Destination: facadeDeliveryDestination(server.URL),
	})
	for _, err := range []error{checkErr, deliveryErr} {
		var exitError *exec.ExitError
		if !errors.As(err, &exitError) || !strings.Contains(err.Error(), "docs/releases/v1.2.3.md") {
			t.Errorf("note inspection error = %v; want note path and Git cause", err)
		}
	}
	if checked.Commit != commit || checked.Tag != "v1.2.3" || delivered.CandidateCommit != commit || delivered.Tag != checked.Tag || delivered.State != releasekit.DeliveryNotAttempted {
		t.Fatalf("missing-note evidence: check=%#v, delivery=%#v", checked, delivered)
	}
	if remote.requests != 0 {
		t.Fatalf("missing note caused %d hosted requests", remote.requests)
	}
	assertInspectionStayedLocal(t, repository, attempts, before)
}

func TestScopedValidationReadsOnlyRequiredBlobsInPartialClone(t *testing.T) {
	source := newPublishFixture(t)
	addNestedReleaseModule(t, source.work, "nested", "example.com/nested", "v1.2.3")
	writeFile(t, source.work, "nested/NOTICE.txt", "nested notice\n")
	writeFile(t, source.work, "nested/README.md", "# Nested guide\n")
	writeFile(t, source.work, "nested/go.work", "go 1.26.0\nuse .\n")
	writeFile(t, source.work, "docs/links.md", "# Links\n\n[Guide](../nested/README.md#nested-guide)\n")
	gitRun(t, source.work, "add", ".")
	gitRun(t, source.work, "commit", "-m", "Add independently scoped module")
	repository := newFilteredSparseCheckout(t, source.work,
		"/go.mod", "/fixture_test.go", "/race_fixture_test.go", "/source.txt", "/docs/")
	before := gitText(t, repository, "cat-file", "--batch-all-objects", "--batch-check=%(objectname)")
	for _, name := range []string{"nested/fixture_test.go", "nested/NOTICE.txt", "nested/README.md"} {
		object := gitText(t, repository, "rev-parse", "HEAD:"+name)
		if strings.Contains(before, object) {
			t.Fatalf("fixture already contains excluded blob %q", name)
		}
	}
	attempts := forbidInspectionTransport(t, repository)
	for _, tc := range []struct {
		name      string
		selection releasekit.ValidationSpec
		wantCheck releasekit.ValidationCheck
		wantPath  string
	}{
		{name: "formatting", selection: releasekit.ValidationSpec{GoFormat: true, SharedFiles: []string{}}},
		{name: "file sizes", selection: releasekit.ValidationSpec{FileSize: &releasekit.FileSizeValidationSpec{}, SharedFiles: []string{}}},
		{name: "workspace metadata", selection: releasekit.ValidationSpec{ModuleDistribution: releasekit.ModuleDistributionValidationSpec{WorkspaceFiles: true}, SharedFiles: []string{}}},
		{name: "explicit shared metadata", selection: releasekit.ValidationSpec{SharedFiles: []string{"nested/NOTICE.txt"}}},
		{name: "excluded shared size", selection: releasekit.ValidationSpec{FileSize: &releasekit.FileSizeValidationSpec{Exclusions: []string{"nested/NOTICE.txt"}}, SharedFiles: []string{"nested/NOTICE.txt"}}},
		{name: "required shared size", selection: releasekit.ValidationSpec{FileSize: &releasekit.FileSizeValidationSpec{}, SharedFiles: []string{"nested/NOTICE.txt"}}, wantCheck: "file-size", wantPath: "nested/NOTICE.txt"},
		{name: "required shared source", selection: releasekit.ValidationSpec{GoFormat: true, SharedFiles: []string{"nested/fixture_test.go"}}, wantCheck: "go-format", wantPath: "nested/fixture_test.go"},
		{name: "required reference", selection: releasekit.ValidationSpec{Markdown: &releasekit.MarkdownValidationSpec{}, SharedFiles: []string{}}, wantCheck: "markdown-links", wantPath: "nested/README.md"},
	} {
		t.Run(tc.name, func(t *testing.T) {
			_, err := releasekit.Check(t.Context(), releasekit.ReleaseRequest{
				RepositoryDir: repository, Product: "Sample App", Version: "v1.2.3", Validation: tc.selection,
			})
			if tc.wantCheck == "" {
				if err != nil {
					t.Fatalf("scoped validation failed: %v", err)
				}
			} else {
				var failure *releasekit.ValidationError
				if !errors.As(err, &failure) || failure.Check != tc.wantCheck || !strings.Contains(err.Error(), tc.wantPath) {
					t.Fatalf("validation error = %v; want %s inspection of %q", err, tc.wantCheck, tc.wantPath)
				}
			}
			assertInspectionStayedLocal(t, repository, attempts, before)
		})
	}
}

func newFilteredSparseCheckout(t *testing.T, source string, paths ...string) string {
	t.Helper()
	gitRun(t, source, "config", "uploadpack.allowFilter", "true")
	repository := filepath.Join(t.TempDir(), "partial")
	gitRun(t, source, "clone", "--filter=blob:none", "--no-checkout", "--no-tags", "file://"+filepath.ToSlash(source), repository)
	gitRun(t, repository, "sparse-checkout", "init", "--no-cone")
	gitRun(t, repository, append([]string{"sparse-checkout", "set"}, paths...)...)
	gitRun(t, repository, "checkout", "main")
	if status := gitText(t, repository, "status", "--porcelain"); status != "" {
		t.Fatalf("sparse checkout is dirty: %s", status)
	}
	return repository
}

func forbidInspectionTransport(t *testing.T, repository string) string {
	t.Helper()
	gitRun(t, repository, "config", "remote.origin.url", "ssh://releasekit-test.invalid/source")
	directory := t.TempDir()
	transport := filepath.Join(directory, "ssh")
	attempts := filepath.Join(directory, "attempts")
	if err := os.WriteFile(transport, []byte("#!/bin/sh\nprintf 'remote accessed\\n' >> \"$RELEASEKIT_GIT_ATTEMPTS\"\nexit 1\n"), 0o755); err != nil {
		t.Fatal(err)
	}
	t.Setenv("GIT_SSH_COMMAND", transport)
	t.Setenv("RELEASEKIT_GIT_ATTEMPTS", attempts)
	t.Setenv("GIT_NO_LAZY_FETCH", "0")
	t.Setenv("GIT_ALLOW_PROTOCOL", "ssh")
	return attempts
}

func assertInspectionStayedLocal(t *testing.T, repository, attempts, before string) {
	t.Helper()
	if data, err := os.ReadFile(attempts); !errors.Is(err, os.ErrNotExist) {
		t.Fatalf("inspection invoked remote transport: %q, error = %v", data, err)
	}
	if after := gitText(t, repository, "cat-file", "--batch-all-objects", "--batch-check=%(objectname)"); after != before {
		t.Fatal("inspection changed the local object database")
	}
}