package main

import (
	"bytes"
	"context"
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/http/httptest"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"strings"
	"testing"

	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit/internal/cli"
)

func TestVersionCommand(t *testing.T) {
	var stdout, stderr bytes.Buffer
	if status := run(context.Background(), []string{"version"}, &stdout, &stderr); status != 0 {
		t.Fatalf("run() status = %d, want 0; stderr = %q", status, stderr.String())
	}
	if want := fmt.Sprintf("releasekit %s\n", buildinfo.Version()); stdout.String() != want {
		t.Fatalf("version output = %q, want %q", stdout.String(), want)
	}
	if stderr.Len() != 0 {
		t.Fatalf("version command wrote to stderr: %q", stderr.String())
	}
}

func TestUnknownCommand(t *testing.T) {
	var stdout, stderr bytes.Buffer
	if status := run(context.Background(), []string{"unknown"}, &stdout, &stderr); status != 2 {
		t.Fatalf("run() status = %d, want 2", status)
	}
	if stdout.Len() != 0 {
		t.Fatalf("unknown command wrote to stdout: %q", stdout.String())
	}
	if want := "unknown command \"unknown\"\n" + cli.Usage + "\n"; stderr.String() != want {
		t.Fatalf("usage output = %q, want %q", stderr.String(), want)
	}
}

func TestCheckCommandBindsConfiguredChecksToCapturedCandidate(t *testing.T) {
	repository := newCLIRepository(t)
	profilePath := filepath.Join(t.TempDir(), "profile with spaces.json")
	orderPath := filepath.Join(t.TempDir(), "check-order")
	t.Setenv("RELEASEKIT_CHECK_ORDER_FILE", orderPath)
	executable, err := os.Executable()
	if err != nil {
		t.Fatal(err)
	}
	check := func(name string) cli.CheckCommand {
		return cli.CheckCommand{
			Args: []string{executable, "-test.run=TestCandidateCheckHelper", "--", name},
			Env: map[string]string{
				"RELEASEKIT_CHECK_HELPER": "1",
				"RELEASEKIT_CHECK_NAME":   name,
				"RELEASEKIT_VERSION":      "profile version",
				"RELEASEKIT_CANDIDATE":    "profile commit",
			},
		}
	}
	settings := cli.Settings{
		Product: "Example Product",
		Remote:  "origin",
		Checks:  []cli.CheckCommand{check("first"), check("second")},
	}
	contents, err := json.Marshal(settings)
	if err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(profilePath, contents, 0o600); err != nil {
		t.Fatal(err)
	}

	var stdout, stderr bytes.Buffer
	args := []string{"check", "--repo", repository, "--config", profilePath, "v1.2.3"}
	if status := run(context.Background(), args, &stdout, &stderr); status != 0 {
		t.Fatalf("run() status = %d; stdout=%q stderr=%q", status, stdout.String(), stderr.String())
	}
	commit := cliGitOutput(t, repository, "rev-parse", "HEAD")
	if got, err := os.ReadFile(orderPath); err != nil || string(got) != "first\nsecond\n" {
		t.Fatalf("configured check order = %q, error = %v", got, err)
	}
	if got, want := strings.Count(stderr.String(), "v1.2.3|"+commit), 2; got != want {
		t.Fatalf("configured checks received captured candidate %d times, want %d; stderr=%q", got, want, stderr.String())
	}
	if want := fmt.Sprintf("local candidate v1.2.3 at %s is valid\n", commit); stdout.String() != want {
		t.Fatalf("stdout = %q, want %q", stdout.String(), want)
	}
}

func TestPublishCommandPublishesConfiguredCandidate(t *testing.T) {
	repository := newCLIRepository(t)
	settings := cli.Settings{
		Product: "Example Product",
		Remote:  "origin",
	}
	contents, err := json.Marshal(settings)
	if err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(repository, "releasekit.json"), contents, 0o600); err != nil {
		t.Fatal(err)
	}
	cliGitRun(t, repository, "add", "releasekit.json")
	cliGitRun(t, repository, "commit", "-m", "configure source release")
	remote := filepath.Join(t.TempDir(), "origin.git")
	cliGitRun(t, repository, "init", "--bare", remote)
	cliGitRun(t, repository, "remote", "add", "origin", remote)
	cliGitRun(t, repository, "push", "--set-upstream", "origin", "main")

	var stdout, stderr bytes.Buffer
	args := []string{"publish", "--repo", repository, "v1.2.3"}
	if status := run(context.Background(), args, &stdout, &stderr); status != 0 {
		t.Fatalf("run() status = %d; stdout=%q stderr=%q", status, stdout.String(), stderr.String())
	}
	commit := cliGitOutput(t, repository, "rev-parse", "HEAD")
	tagObject := cliGitOutput(t, repository, "rev-parse", "refs/tags/v1.2.3")
	if want := fmt.Sprintf("published v1.2.3 at %s (tag object %s)\n", commit, tagObject); stdout.String() != want {
		t.Fatalf("stdout = %q, want %q", stdout.String(), want)
	}
	if !bytes.Contains(stderr.Bytes(), []byte("validating and publishing v1.2.3")) || !bytes.Contains(stderr.Bytes(), []byte("example.com/cli-candidate")) {
		t.Fatalf("stderr does not show publication progress and validation: %q", stderr.String())
	}
	if got := cliGitOutput(t, remote, "rev-parse", "refs/tags/v1.2.3"); got != tagObject {
		t.Fatalf("remote tag object = %s, want %s", got, tagObject)
	}
}

func TestBuildCommandWritesValidatedReceiptForConfiguredArtifacts(t *testing.T) {
	repository := newCLIBuildRepository(t, `package main

import (
	"fmt"
	"os"

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

func main() {
	if len(os.Args) == 2 && os.Args[1] == "version" { fmt.Printf("fixture %s\n", buildinfo.Version()) }
}
`)
	var stdout, stderr bytes.Buffer
	args := []string{"build", "--repo", repository, "v1.2.3"}
	if status := run(context.Background(), args, &stdout, &stderr); status != 0 {
		t.Fatalf("run() status = %d; stdout=%q stderr=%q", status, stdout.String(), stderr.String())
	}
	receiptPath := filepath.Join(repository, "dist", cli.BuildReceiptName)
	receipt, err := cli.LoadBuildReceipt(receiptPath)
	if err != nil {
		t.Fatal(err)
	}
	commit := cliGitOutput(t, repository, "rev-parse", "HEAD")
	settings := cli.BuildSettings{
		MainPackage: "./cmd/app",
		BinaryName:  "fixture",
		Targets:     []string{fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH)},
	}
	if !receipt.MatchesBuild(repository, commit, "v1.2.3", settings) || len(receipt.Artifacts) != 1 {
		t.Fatalf("build receipt = %#v", receipt)
	}
	if !bytes.Contains(stdout.Bytes(), []byte(receipt.Artifacts[0].Filename)) || !bytes.Contains(stdout.Bytes(), []byte(receipt.Artifacts[0].SHA256)) {
		t.Fatalf("stdout does not report receipt artifacts: %q", stdout.String())
	}
	if got := cliGitOutput(t, repository, "status", "--porcelain"); got != "" {
		t.Fatalf("build output dirtied candidate: %s", got)
	}
}

func TestBuildCommandLeavesNoReceiptAfterSmokeFailure(t *testing.T) {
	repository := newCLIBuildRepository(t, `package main
import (
	"fmt"
	"os"
)
func main() { if len(os.Args) == 2 && os.Args[1] == "version" { fmt.Println("wrong") } }
`)
	var stdout, stderr bytes.Buffer
	args := []string{"build", "--repo", repository, "v1.2.3"}
	if status := run(context.Background(), args, &stdout, &stderr); status != 1 {
		t.Fatalf("run() status = %d; stdout=%q stderr=%q, want 1", status, stdout.String(), stderr.String())
	}
	if stdout.Len() != 0 || !bytes.Contains(stderr.Bytes(), []byte("native version output")) {
		t.Fatalf("stdout=%q stderr=%q; want smoke failure without final output", stdout.String(), stderr.String())
	}
	if _, err := os.Stat(filepath.Join(repository, "dist", cli.BuildReceiptName)); !os.IsNotExist(err) {
		t.Fatalf("partial build wrote receipt: %v", err)
	}
	filename := fmt.Sprintf("fixture-v1.2.3-%s-%s", runtime.GOOS, runtime.GOARCH)
	if runtime.GOOS == "windows" {
		filename += ".exe"
	}
	if _, err := os.Stat(filepath.Join(repository, "dist", filename)); err != nil {
		t.Fatalf("completed artifact not reported or retained: %v; stderr=%q", err, stderr.String())
	}
}

func TestCandidateCheckHelper(t *testing.T) {
	if os.Getenv("RELEASEKIT_CHECK_HELPER") != "1" {
		return
	}
	if orderPath := os.Getenv("RELEASEKIT_CHECK_ORDER_FILE"); orderPath != "" {
		file, err := os.OpenFile(orderPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0o600)
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(9)
		}
		if _, err := fmt.Fprintln(file, os.Getenv("RELEASEKIT_CHECK_NAME")); err != nil {
			_ = file.Close()
			fmt.Fprintln(os.Stderr, err)
			os.Exit(9)
		}
		if err := file.Close(); err != nil {
			fmt.Fprintln(os.Stderr, err)
			os.Exit(9)
		}
	}
	fmt.Fprintf(os.Stdout, "%s|%s", os.Getenv("RELEASEKIT_VERSION"), os.Getenv("RELEASEKIT_CANDIDATE"))
	os.Exit(0)
}

func newCLIRepository(t *testing.T) string {
	t.Helper()
	repository := filepath.Join(t.TempDir(), "candidate repository")
	if err := os.Mkdir(repository, 0o700); err != nil {
		t.Fatal(err)
	}
	cliGitRun(t, repository, "init", "--initial-branch=main")
	cliGitRun(t, repository, "config", "user.name", "ReleaseKit Test")
	cliGitRun(t, repository, "config", "user.email", "releasekit@example.test")
	cliGitRun(t, repository, "config", "commit.gpgsign", "false")
	write := func(name, value string) {
		t.Helper()
		path := filepath.Join(repository, filepath.FromSlash(name))
		if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(path, []byte(value), 0o600); err != nil {
			t.Fatal(err)
		}
	}
	write("go.mod", "module example.com/cli-candidate\n\ngo 1.25.0\n")
	write("candidate_test.go", "package candidate\nimport \"testing\"\nfunc TestFixture(t *testing.T) {}\n")
	write("docs/releases/v1.2.3.md", "# Example Product v1.2.3\n\nRelease note.\n")
	cliGitRun(t, repository, "add", "--all")
	cliGitRun(t, repository, "commit", "-m", "candidate")
	return repository
}

func TestDeliverPageOnlyCreatesAndReusesRelease(t *testing.T) {
	repository := newCLIRepository(t)
	state := &deliveryServerState{}
	server := newDeliveryServer(t, state)
	defer server.Close()
	settings := cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}}
	writeDeliveryProfile(t, repository, settings)
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3") // Historical lightweight tags are valid delivery inputs.
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	for attempt := 0; attempt < 2; attempt++ {
		var stdout, stderr bytes.Buffer
		status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
		if status != 0 {
			t.Fatalf("delivery attempt %d status=%d stdout=%q stderr=%q", attempt+1, status, stdout.String(), stderr.String())
		}
		if !strings.Contains(stdout.String(), "state complete") || !strings.Contains(stdout.String(), "release: "+server.URL+"/releases/10") {
			t.Fatalf("delivery output = %q", stdout.String())
		}
	}
	if state.releaseCreates != 1 || state.assetUploads != 0 || state.assetListReads != 0 {
		t.Fatalf("page-only calls = creates:%d asset uploads:%d asset reads:%d", state.releaseCreates, state.assetUploads, state.assetListReads)
	}
	if state.noteBody != "# Example Product v1.2.3\n\nRelease note.\n" {
		t.Fatalf("hosted note body = %q", state.noteBody)
	}
}

func TestDeliverBuildsTaggedArtifactsAndReusesAssets(t *testing.T) {
	repository := newDeliveryBuildRepository(t)
	state := &deliveryServerState{}
	server := newDeliveryServer(t, state)
	defer server.Close()
	settings := cli.Settings{
		Product:  "Example Product",
		Build:    &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}},
		Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
	}
	writeDeliveryProfile(t, repository, settings)
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	cliGitRun(t, repository, "checkout", "--detach", "v1.2.3")
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	for attempt := 0; attempt < 2; attempt++ {
		var stdout, stderr bytes.Buffer
		status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
		if status != 0 {
			t.Fatalf("delivery attempt %d status=%d stdout=%q stderr=%q", attempt+1, status, stdout.String(), stderr.String())
		}
	}
	if state.releaseCreates != 1 || state.assetUploads != 2 {
		t.Fatalf("delivery calls = creates:%d asset uploads:%d", state.releaseCreates, state.assetUploads)
	}
	if _, ok := state.assets["helper-v1.2.3-linux-amd64"]; !ok {
		t.Fatalf("binary was not uploaded: %#v", state.assets)
	}
	if _, ok := state.assets["SHA256SUMS"]; !ok {
		t.Fatalf("checksum manifest was not uploaded: %#v", state.assets)
	}
}

func TestDeliverFailureReportsRecoveryForPartialConflictAndUnknownStates(t *testing.T) {
	for _, test := range []struct {
		name               string
		state              string
		status             int
		recovery           []string
		assetObservation   string
		missingObservation string
	}{
		{
			name:             "partial",
			status:           1,
			recovery:         []string{"recovery: fix the reported cause", "retry this version"},
			assetObservation: "pending helper-v1.2.3-linux-amd64",
		},
		{
			name:               "conflict",
			status:             1,
			recovery:           []string{"investigate conflicting hosted content", "new version", "retain the original build artifacts"},
			assetObservation:   "conflicting helper-v1.2.3-linux-amd64",
			missingObservation: "pending SHA256SUMS",
		},
		{
			name:               "unknown",
			status:             3,
			recovery:           []string{"resolve the remote state before retrying"},
			assetObservation:   "uncertain helper-v1.2.3-linux-amd64",
			missingObservation: "pending SHA256SUMS",
		},
	} {
		t.Run(test.name, func(t *testing.T) {
			repository := newCLIRepository(t)
			state := &deliveryServerState{}
			server := newDeliveryServer(t, state)
			defer server.Close()
			build := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
			writeDeliveryProfile(t, repository, cli.Settings{
				Product:  "Example Product",
				Build:    &build,
				Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"},
			})
			state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
			cliGitRun(t, repository, "tag", "v1.2.3")
			assetsDir, _ := writeDeliveryReceipt(t, repository, build)
			switch test.name {
			case "partial":
				state.failAssetName = "helper-v1.2.3-linux-amd64"
			case "conflict":
				state.assets["helper-v1.2.3-linux-amd64"] = []byte("different hosted bytes")
			case "unknown":
				state.ambiguousAssetName = "helper-v1.2.3-linux-amd64"
			}
			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
			var stdout, stderr bytes.Buffer
			status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assetsDir, "v1.2.3"}, &stdout, &stderr)
			if status != test.status || !strings.Contains(stderr.String(), "state="+test.name) {
				t.Fatalf("status=%d output=%q want status=%d state=%s", status, stderr.String(), test.status, test.name)
			}
			for _, phrase := range test.recovery {
				if !strings.Contains(stderr.String(), phrase) {
					t.Errorf("delivery output does not include recovery guidance %q: %s", phrase, stderr.String())
				}
			}
			if !strings.Contains(stderr.String(), test.assetObservation) {
				t.Errorf("delivery output does not include asset observation %q: %s", test.assetObservation, stderr.String())
			}
			if test.missingObservation != "" && !strings.Contains(stderr.String(), test.missingObservation) {
				t.Errorf("delivery output does not include later missing asset %q: %s", test.missingObservation, stderr.String())
			}
			if test.name == "unknown" && strings.Contains(stderr.String(), "pending helper-v1.2.3-linux-amd64") {
				t.Errorf("uncertain asset also appears pending: %s", stderr.String())
			}
		})
	}
}

func TestDeliverRejectsWrongHostedTagBeforeReleaseWrite(t *testing.T) {
	repository := newCLIRepository(t)
	state := &deliveryServerState{remoteCommit: strings.Repeat("0", 40)}
	server := newDeliveryServer(t, state)
	defer server.Close()
	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	var stdout, stderr bytes.Buffer
	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
	if status != 1 || state.releaseCreates != 0 || state.assetUploads != 0 {
		t.Fatalf("wrong hosted tag status=%d creates=%d uploads=%d stdout=%q stderr=%q", status, state.releaseCreates, state.assetUploads, stdout.String(), stderr.String())
	}
}

func TestDeliverRequiresCredentialBeforeRemoteRequests(t *testing.T) {
	repository := newCLIRepository(t)
	state := &deliveryServerState{}
	server := newDeliveryServer(t, state)
	defer server.Close()
	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example", TokenEnv: "RELEASEKIT_TEST_DELIVERY_TOKEN"}})
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	t.Setenv("RELEASEKIT_TEST_DELIVERY_TOKEN", "")
	var stdout, stderr bytes.Buffer
	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
	if status != 2 || state.apiRequests != 0 || !strings.Contains(stderr.String(), "RELEASEKIT_TEST_DELIVERY_TOKEN") {
		t.Fatalf("missing credential status=%d requests=%d stdout=%q stderr=%q", status, state.apiRequests, stdout.String(), stderr.String())
	}
}

func TestDeliverRejectsCheckoutThatDiffersFromLocalTag(t *testing.T) {
	repository := newCLIRepository(t)
	state := &deliveryServerState{}
	server := newDeliveryServer(t, state)
	defer server.Close()
	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	if err := os.WriteFile(filepath.Join(repository, "later.txt"), []byte("later commit"), 0o600); err != nil {
		t.Fatal(err)
	}
	cliGitRun(t, repository, "add", "later.txt")
	cliGitRun(t, repository, "commit", "-m", "advance checkout")
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	var stdout, stderr bytes.Buffer
	status := run(context.Background(), []string{"deliver", "--repo", repository, "v1.2.3"}, &stdout, &stderr)
	if status != 1 || state.apiRequests != 0 || state.releaseCreates != 0 {
		t.Fatalf("mismatched checkout status=%d requests=%d creates=%d stdout=%q stderr=%q", status, state.apiRequests, state.releaseCreates, stdout.String(), stderr.String())
	}
	if got := cliGitOutput(t, repository, "rev-parse", "refs/tags/v1.2.3"); got != state.commit {
		t.Fatalf("delivery moved tag from %s to %s", state.commit, got)
	}
}

func TestDeliverRejectsTamperedAssetsAndStaleReceiptBeforeRemoteWrites(t *testing.T) {
	for _, mode := range []string{"valid receipt", "tampered", "stale settings"} {
		t.Run(mode, func(t *testing.T) {
			repository := newCLIRepository(t)
			state := &deliveryServerState{}
			server := newDeliveryServer(t, state)
			defer server.Close()
			current := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
			settings := cli.Settings{Product: "Example Product", Build: &current, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}}
			writeDeliveryProfile(t, repository, settings)
			state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
			cliGitRun(t, repository, "tag", "v1.2.3")
			receiptSettings := current
			if mode == "stale settings" {
				receiptSettings.BinaryName = "previous"
			}
			assetsDir, artifactPath := writeDeliveryReceipt(t, repository, receiptSettings)
			if mode == "tampered" {
				if err := os.WriteFile(artifactPath, []byte("tampered artifact"), 0o600); err != nil {
					t.Fatal(err)
				}
			}
			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
			var stdout, stderr bytes.Buffer
			status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assetsDir, "v1.2.3"}, &stdout, &stderr)
			if mode == "valid receipt" {
				if status != 0 || state.releaseCreates != 1 || state.assetUploads != 2 {
					t.Fatalf("valid receipt status=%d creates=%d uploads=%d stdout=%q stderr=%q", status, state.releaseCreates, state.assetUploads, stdout.String(), stderr.String())
				}
				return
			}
			if status != 1 || state.apiRequests != 0 || state.releaseCreates != 0 || state.assetUploads != 0 {
				t.Fatalf("%s receipt status=%d requests=%d stdout=%q stderr=%q", mode, status, state.apiRequests, stdout.String(), stderr.String())
			}
		})
	}
}

func writeDeliveryReceipt(t *testing.T, repository string, settings cli.BuildSettings) (string, string) {
	t.Helper()
	assetsDir := t.TempDir()
	filename := settings.BinaryName + "-v1.2.3-linux-amd64"
	artifactPath := filepath.Join(assetsDir, filename)
	content := []byte("fixture artifact")
	if err := os.WriteFile(artifactPath, content, 0o600); err != nil {
		t.Fatal(err)
	}
	resolvedRepository, err := filepath.Abs(repository)
	if err != nil {
		t.Fatal(err)
	}
	digest := sha256.Sum256(content)
	target := cli.ReceiptTarget{OS: "linux", Arch: "amd64"}
	receipt := cli.BuildReceipt{
		RepositoryDir: resolvedRepository, CandidateCommit: cliGitOutput(t, repository, "rev-parse", "HEAD"),
		SourceVerified: true,
		Version:        "v1.2.3", MainPackage: settings.MainPackage, BinaryName: settings.BinaryName,
		OutputDir: assetsDir, Targets: []cli.ReceiptTarget{target}, Compiler: "go version fixture",
		Artifacts: []cli.ReceiptArtifact{{Path: artifactPath, Filename: filename, Target: target, SHA256: hex.EncodeToString(digest[:])}},
	}
	if _, err := cli.WriteBuildReceipt(assetsDir, receipt); err != nil {
		t.Fatal(err)
	}
	return assetsDir, artifactPath
}

type deliveryServerState struct {
	malformedCreate    bool
	failAssetListing   bool
	failAssetDownloads bool
	failAssetName      string
	ambiguousAssetName string
	commit             string
	product            string
	remoteCommit       string
	apiRequests        int
	pageExists         bool
	releaseCreates     int
	assetUploads       int
	assetListReads     int
	noteBody           string
	assets             map[string][]byte
}

func newDeliveryServer(t *testing.T, state *deliveryServerState) *httptest.Server {
	t.Helper()
	if state.assets == nil {
		state.assets = make(map[string][]byte)
	}
	serverURL := ""
	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if strings.HasPrefix(r.URL.Path, "/api/") {
			state.apiRequests++
			if r.Header.Get("Authorization") != "token fixture-token" {
				t.Errorf("authorization = %q", r.Header.Get("Authorization"))
			}
		}
		switch r.URL.Path {
		case "/api/v1/repos/owner/example/tags/v1.2.3":
			if state.commit == "" {
				t.Error("tag source commit was not initialized")
			}
			commit := state.remoteCommit
			if commit == "" {
				commit = state.commit
			}
			_, _ = fmt.Fprintf(w, `{"name":"v1.2.3","commit":{"sha":%q}}`, commit)
		case "/api/v1/repos/owner/example/releases/tags/v1.2.3":
			if !state.pageExists {
				http.NotFound(w, r)
				return
			}
			writeDeliveryRelease(w, serverURL, state)
		case "/api/v1/repos/owner/example/releases":
			if r.Method != http.MethodPost {
				t.Errorf("release request method = %s", r.Method)
				http.Error(w, "method", 405)
				return
			}
			var payload struct {
				Tag    string `json:"tag_name"`
				Target string `json:"target_commitish"`
				Name   string `json:"name"`
				Body   string `json:"body"`
			}
			if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
				t.Errorf("decode create payload: %v", err)
			}
			if payload.Tag != "v1.2.3" || payload.Target != state.commit {
				t.Errorf("release source payload = %#v", payload)
			}
			state.pageExists, state.releaseCreates, state.noteBody = true, state.releaseCreates+1, payload.Body
			if state.malformedCreate {
				w.WriteHeader(http.StatusCreated)
				_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "tag_name": "v1.2.3", "name": "inconsistent response", "body": payload.Body})
				return
			}
			writeDeliveryRelease(w, serverURL, state)
		case "/api/v1/repos/owner/example/releases/10/assets":
			if r.Method == http.MethodGet {
				state.assetListReads++
				if state.failAssetListing {
					http.Error(w, "unavailable", 503)
					return
				}
				list := make([]map[string]any, 0, len(state.assets))
				for name, content := range state.assets {
					list = append(list, map[string]any{"id": len(list) + 1, "name": name, "size": len(content), "browser_download_url": serverURL + "/files/" + name})
				}
				_ = json.NewEncoder(w).Encode(list)
				return
			}
			if r.Method != http.MethodPost {
				t.Errorf("asset request method = %s", r.Method)
				http.Error(w, "method", 405)
				return
			}
			name := r.URL.Query().Get("name")
			file, _, err := r.FormFile("attachment")
			if err != nil {
				t.Errorf("read asset upload %q: %v", name, err)
				http.Error(w, "multipart", 400)
				return
			}
			content, err := io.ReadAll(file)
			_ = file.Close()
			if err != nil {
				t.Errorf("read asset bytes: %v", err)
			}
			if _, exists := state.assets[name]; exists {
				t.Errorf("asset %q uploaded more than once", name)
			}
			if name == state.failAssetName {
				http.Error(w, "upload failed", http.StatusBadRequest)
				return
			}
			if name == state.ambiguousAssetName {
				http.Error(w, "upload outcome ambiguous", http.StatusInternalServerError)
				return
			}
			state.assets[name] = content
			state.assetUploads++
			_ = json.NewEncoder(w).Encode(map[string]any{"id": state.assetUploads, "name": name, "size": len(content)})
		default:
			if strings.HasPrefix(r.URL.Path, "/files/") {
				if state.failAssetDownloads {
					http.Error(w, "unavailable", 503)
					return
				}
				name := strings.TrimPrefix(r.URL.Path, "/files/")
				content, ok := state.assets[name]
				if !ok {
					http.NotFound(w, r)
					return
				}
				_, _ = w.Write(content)
				return
			}
			t.Errorf("unexpected delivery request %s %s", r.Method, r.URL.String())
			http.NotFound(w, r)
		}
	})
	server := httptest.NewServer(handler)
	serverURL = server.URL
	return server
}

func writeDeliveryRelease(w http.ResponseWriter, serverURL string, state *deliveryServerState) {
	w.Header().Set("Content-Type", "application/json")
	product := state.product
	if product == "" {
		product = "Example Product"
	}
	_ = json.NewEncoder(w).Encode(map[string]any{"id": 10, "html_url": serverURL + "/releases/10", "tag_name": "v1.2.3", "target_commitish": state.commit, "name": product + " v1.2.3", "body": state.noteBody, "draft": false, "prerelease": false})
}

func writeDeliveryProfile(t *testing.T, repository string, settings cli.Settings) {
	t.Helper()
	contents, err := json.Marshal(settings)
	if err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(repository, "releasekit.json"), contents, 0o600); err != nil {
		t.Fatal(err)
	}
	cliGitRun(t, repository, "add", "releasekit.json")
	cliGitRun(t, repository, "commit", "-m", "configure delivery")
}

func newDeliveryBuildRepository(t *testing.T) string {
	t.Helper()
	repository := filepath.Join(t.TempDir(), "tagged application")
	if err := os.Mkdir(repository, 0o700); err != nil {
		t.Fatal(err)
	}
	cliGitRun(t, repository, "init", "--initial-branch=main")
	cliGitRun(t, repository, "config", "user.name", "ReleaseKit Test")
	cliGitRun(t, repository, "config", "user.email", "releasekit@example.test")
	files := map[string]string{
		"go.mod":                  "module example.com/tagged-app\n\ngo 1.25.0\n",
		"main.go":                 "package main\nimport \"fmt\"\nfunc main() { fmt.Println(\"helper v1.2.3\") }\n",
		"docs/releases/v1.2.3.md": "# Example Product v1.2.3\n\nRelease note.\n",
	}
	for name, contents := range files {
		path := filepath.Join(repository, filepath.FromSlash(name))
		if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
			t.Fatal(err)
		}
	}
	cliGitRun(t, repository, "add", "--all")
	cliGitRun(t, repository, "commit", "-m", "tagged candidate")
	return repository
}

func newCLIBuildRepository(t *testing.T, mainSource string) string {
	t.Helper()
	repository := newCLIRepository(t)
	root, err := filepath.Abs(filepath.Join("..", ".."))
	if err != nil {
		t.Fatal(err)
	}
	module := fmt.Sprintf("module example.com/cli-candidate\n\ngo 1.25.0\n\nrequire gitea.maximumdirect.net/eric/ReleaseKit v0.0.0\n\nreplace gitea.maximumdirect.net/eric/ReleaseKit => %s\n", filepath.ToSlash(root))
	write := func(name, contents string) {
		t.Helper()
		path := filepath.Join(repository, filepath.FromSlash(name))
		if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
			t.Fatal(err)
		}
	}
	write("go.mod", module)
	write("cmd/app/main.go", mainSource)
	write("releasekit.json", fmt.Sprintf(`{"product":"Example Product","build":{"main_package":"./cmd/app","binary_name":"fixture","targets":[%q]}}`, fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH)))
	write(".gitignore", "dist/\n")
	cliGitRun(t, repository, "add", "--all")
	cliGitRun(t, repository, "commit", "-m", "configure build")
	return repository
}

func cliGitRun(t *testing.T, repository string, args ...string) {
	t.Helper()
	commandArgs := append([]string{"git"}, args...)
	command := exec.Command(commandArgs[0], commandArgs[1:]...)
	command.Dir = repository
	output, err := command.CombinedOutput()
	if err != nil {
		t.Fatalf("%v: %v\n%s", commandArgs, err, output)
	}
}

func cliGitOutput(t *testing.T, repository string, args ...string) string {
	t.Helper()
	commandArgs := append([]string{"git"}, args...)
	command := exec.Command(commandArgs[0], commandArgs[1:]...)
	command.Dir = repository
	output, err := command.Output()
	if err != nil {
		t.Fatalf("%v: %v", commandArgs, err)
	}
	return strings.TrimSpace(string(output))
}

func TestDeliverRejectsReceiptBuiltFromDirtySourceAfterCleanup(t *testing.T) {
	repository := newDeliveryBuildRepository(t)
	state := &deliveryServerState{}
	server := newDeliveryServer(t, state)
	defer server.Close()
	settings := cli.Settings{Product: "Example Product", Build: &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}}
	writeDeliveryProfile(t, repository, settings)
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	mainPath := filepath.Join(repository, "main.go")
	original, err := os.ReadFile(mainPath)
	if err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(mainPath, append(original, []byte("\n// uncommitted build\n")...), 0600); err != nil {
		t.Fatal(err)
	}
	assets := t.TempDir()
	var stdout, stderr bytes.Buffer
	if status := run(context.Background(), []string{"build", "--repo", repository, "--output", assets, "v1.2.3"}, &stdout, &stderr); status != 0 {
		t.Fatalf("local build status=%d %s", status, stderr.String())
	}
	receipt, err := cli.LoadBuildReceipt(filepath.Join(assets, cli.BuildReceiptName))
	if err != nil {
		t.Fatal(err)
	}
	if receipt.SourceVerified {
		t.Fatal("dirty build receipt claims verified source")
	}
	cliGitRun(t, repository, "restore", "main.go")
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	stdout.Reset()
	stderr.Reset()
	status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assets, "v1.2.3"}, &stdout, &stderr)
	if status != 1 || state.apiRequests != 0 || !strings.Contains(stderr.String(), "build source") {
		t.Fatalf("status=%d requests=%d %s", status, state.apiRequests, stderr.String())
	}
}

func TestRecoveredPageCreatePreservesPartialDeliveryOnInspectionFailure(t *testing.T) {
	repository := newCLIRepository(t)
	state := &deliveryServerState{malformedCreate: true, failAssetListing: true}
	server := newDeliveryServer(t, state)
	defer server.Close()
	build := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Build: &build, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	assets, _ := writeDeliveryReceipt(t, repository, build)
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	var stdout, stderr bytes.Buffer
	status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assets, "v1.2.3"}, &stdout, &stderr)
	if status != 1 || !strings.Contains(stderr.String(), "state=partial") || state.releaseCreates != 1 || state.assetListReads != 1 || state.assetUploads != 0 {
		t.Fatalf("status=%d state=%#v %s", status, state, stderr.String())
	}
}

func TestUnreadableAssetsDoNotClaimAnUnknownWrite(t *testing.T) {
	for _, existingPage := range []bool{false, true} {
		t.Run(fmt.Sprintf("existing-page-%t", existingPage), func(t *testing.T) {
			repository := newCLIRepository(t)
			state := &deliveryServerState{pageExists: existingPage, noteBody: "# Example Product v1.2.3\n\nRelease note.\n", failAssetDownloads: true, assets: map[string][]byte{"helper-v1.2.3-linux-amd64": []byte("fixture artifact")}}
			server := newDeliveryServer(t, state)
			defer server.Close()
			build := cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}
			writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Build: &build, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
			state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
			cliGitRun(t, repository, "tag", "v1.2.3")
			assets, _ := writeDeliveryReceipt(t, repository, build)
			t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
			var stdout, stderr bytes.Buffer
			status := run(context.Background(), []string{"deliver", "--repo", repository, "--assets", assets, "v1.2.3"}, &stdout, &stderr)
			expectedState := "partial"
			expectedCreates := 1
			if existingPage {
				expectedState = "not_attempted"
				expectedCreates = 0
			}
			if status != 1 || !strings.Contains(stderr.String(), "state="+expectedState) || state.assetUploads != 0 || state.releaseCreates != expectedCreates {
				t.Fatalf("status=%d creates=%d uploads=%d %s", status, state.releaseCreates, state.assetUploads, stderr.String())
			}
			if existingPage && !strings.Contains(stderr.String(), "recovery: fix the local or preflight failure") {
				t.Fatalf("not-attempted recovery guidance missing: %s", stderr.String())
			}
		})
	}
}

func TestFailedRebuildInvalidatesPreviousReceipt(t *testing.T) {
	const source = `package main
import("fmt";"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo")
func main(){fmt.Println("fixture",buildinfo.Version())}
`
	repository := newCLIBuildRepository(t, source)
	var stdout, stderr bytes.Buffer
	args := []string{"build", "--repo", repository, "v1.2.3"}
	for attempt := 0; attempt < 2; attempt++ {
		if status := run(context.Background(), args, &stdout, &stderr); status != 0 {
			t.Fatalf("build %d: status=%d %s", attempt, status, stderr.String())
		}
	}
	path := filepath.Join(repository, "cmd/app/main.go")
	if err := os.WriteFile(path, []byte("package main\nfunc main(){}\n"), 0600); err != nil {
		t.Fatal(err)
	}
	if status := run(context.Background(), args, &stdout, &stderr); status != 1 {
		t.Fatalf("failed rebuild status=%d", status)
	}
	if _, err := os.Stat(filepath.Join(repository, "dist", cli.BuildReceiptName)); !os.IsNotExist(err) {
		t.Fatalf("stale receipt remains: %v", err)
	}
}

func TestTemporaryDeliveryBuildDoesNotRequireWritableRepositoryParent(t *testing.T) {
	if runtime.GOOS == "windows" || os.Getuid() == 0 {
		t.Skip("requires ordinary Unix permission checks")
	}
	repository := newDeliveryBuildRepository(t)
	state := &deliveryServerState{}
	server := newDeliveryServer(t, state)
	defer server.Close()
	writeDeliveryProfile(t, repository, cli.Settings{Product: "Example Product", Build: &cli.BuildSettings{MainPackage: ".", BinaryName: "helper", Targets: []string{"linux/amd64"}}, Delivery: &cli.DeliverySettings{BaseURL: server.URL, Owner: "owner", Repository: "example"}})
	state.commit = cliGitOutput(t, repository, "rev-parse", "HEAD")
	cliGitRun(t, repository, "tag", "v1.2.3")
	parent := t.TempDir()
	moved := filepath.Join(parent, "repo")
	if err := os.Rename(repository, moved); err != nil {
		t.Fatal(err)
	}
	if err := os.Chmod(parent, 0555); err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { os.Chmod(parent, 0700) })
	t.Setenv("RELEASEKIT_GITEA_TOKEN", "fixture-token")
	var stdout, stderr bytes.Buffer
	if status := run(context.Background(), []string{"deliver", "--repo", moved, "v1.2.3"}, &stdout, &stderr); status != 0 {
		t.Fatalf("status=%d %s", status, stderr.String())
	}
	if status := cliGitOutput(t, moved, "status", "--porcelain"); status != "" {
		t.Fatalf("source dirtied: %s", status)
	}
}