package git

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

func TestInspectTaggedSourceSupportsLightweightAndAnnotatedTags(t *testing.T) {
	fixture := newRemoteFixture(t)
	gitRun(t, fixture.work, "tag", "v1.2.3")
	gitRun(t, fixture.work, "checkout", "--detach", "HEAD")
	lightweight, err := InspectTaggedSource(context.Background(), fixture.work, "v1.2.3")
	if err != nil {
		t.Fatal(err)
	}
	if lightweight.Head != fixture.commit || lightweight.TagCommit != fixture.commit || lightweight.TagObject != fixture.commit || lightweight.TagObjectType != "commit" || lightweight.Status != "" {
		t.Fatalf("lightweight source = %#v", lightweight)
	}
	gitRun(t, fixture.work, "tag", "-d", "v1.2.3")
	gitRun(t, fixture.work, "tag", "-a", "v1.2.3", "-m", "Historical release")
	annotated, err := InspectTaggedSource(context.Background(), fixture.work, "v1.2.3")
	if err != nil {
		t.Fatal(err)
	}
	if annotated.Head != fixture.commit || annotated.TagCommit != fixture.commit || annotated.TagObject == fixture.commit || annotated.TagObjectType != "tag" || annotated.Status != "" {
		t.Fatalf("annotated source = %#v", annotated)
	}
}

func TestCandidateObjectReadsStayLocalInPartialClones(t *testing.T) {
	fixture := newRemoteFixture(t)
	gitRun(t, fixture.work, "config", "uploadpack.allowFilter", "true")
	blob := strings.TrimSpace(gitText(t, fixture.work, "rev-parse", "HEAD:source.txt"))
	for _, filter := range []string{"blob:none", "tree:0"} {
		t.Run(filter, func(t *testing.T) {
			repository := filepath.Join(t.TempDir(), "partial")
			gitRun(t, fixture.work, "clone", "--filter="+filter, "--no-checkout", "file://"+filepath.ToSlash(fixture.work), repository)
			before := gitText(t, repository, "cat-file", "--batch-all-objects", "--batch-check=%(objectname)")
			if strings.Contains(before, blob) {
				t.Fatal("fixture contains the filtered blob")
			}
			gitRun(t, repository, "config", "remote.origin.url", "ssh://releasekit-test.invalid/source")
			attempts := filepath.Join(t.TempDir(), "attempts")
			transport := filepath.Join(t.TempDir(), "ssh")
			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")
			if _, err := ReadTree(t.Context(), repository, fixture.commit); err == nil {
				t.Fatal("tree inspection succeeded with unavailable objects")
			}
			_, err := ReadBlob(t.Context(), repository, blob)
			var exitError *exec.ExitError
			if !errors.As(err, &exitError) {
				t.Fatalf("blob error %v lost its Git process cause", err)
			}
			if data, err := os.ReadFile(attempts); !errors.Is(err, os.ErrNotExist) {
				t.Fatalf("object inspection invoked remote transport: %q, %v", data, err)
			}
			after := gitText(t, repository, "cat-file", "--batch-all-objects", "--batch-check=%(objectname)")
			if before != after {
				t.Fatal("object inspection populated the object database")
			}
		})
	}
}

func TestInspectTaggedSourceReportsDirtyCheckoutAndReadCommitFile(t *testing.T) {
	fixture := newRemoteFixture(t)
	gitRun(t, fixture.work, "tag", "v1.2.3")
	content, err := ReadCommitFile(context.Background(), fixture.work, fixture.commit, "source.txt")
	if err != nil || string(content) != "candidate" {
		t.Fatalf("committed content = %q, error = %v", content, err)
	}
	writeRepoFile(t, fixture.work, "untracked.txt", "dirty")
	source, err := InspectTaggedSource(context.Background(), fixture.work, "v1.2.3")
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(source.Status, "untracked.txt") {
		t.Fatalf("dirty status = %q", source.Status)
	}
}