package cli_test

import (
	"bytes"
	"runtime"
	"strings"
	"testing"

	"sneak.berlin/go/vaultik/internal/cli"
	"sneak.berlin/go/vaultik/internal/globals"
)

// runVersionCommand executes `vaultik version` with its output
// captured, and returns what it printed.
func runVersionCommand(t *testing.T) string {
	t.Helper()

	cmd := cli.NewVersionCommand()

	var out bytes.Buffer

	cmd.SetOut(&out)
	cmd.SetErr(&out)
	cmd.SetArgs([]string{})

	err := cmd.Execute()
	if err != nil {
		t.Fatalf("version command failed: %v", err)
	}

	return out.String()
}

// TestVersionCommandReportsBuildVersion checks that the first line of
// the report is the version the binary was actually built with. The
// test binary carries no -ldflags, so that is the "dev" default -- the
// same string an untagged `make vaultik` build stamps a prefix of.
//
//nolint:paralleltest // executes a command that reads the global rootFlags
func TestVersionCommandReportsBuildVersion(t *testing.T) {
	out := runVersionCommand(t)

	wantFirst := "vaultik " + globals.Version
	if first, _, _ := strings.Cut(out, "\n"); first != wantFirst {
		t.Errorf("first line = %q, want %q", first, wantFirst)
	}

	if !strings.Contains(out, "commit:") {
		t.Error("output does not report the commit")
	}
}

// TestVersionCommandReportLines checks the label, padding and value of
// every line of the report. Commit and CommitDate get different values,
// so a line that prints the wrong one fails.
//
//nolint:paralleltest // sets globals.Commit and globals.CommitDate
func TestVersionCommandReportLines(t *testing.T) {
	const (
		commit     = "abc1234"
		commitDate = "2026-11-09"
	)

	previousCommit, previousCommitDate := globals.Commit, globals.CommitDate

	t.Cleanup(func() {
		globals.Commit = previousCommit
		globals.CommitDate = previousCommitDate
	})

	globals.Commit = commit
	globals.CommitDate = commitDate

	want := "vaultik " + globals.Version + "\n" +
		"  commit:      " + commit + "\n" +
		"  commit date: " + commitDate + "\n" +
		"  go:          " + runtime.Version() + "\n" +
		"  os/arch:     " + runtime.GOOS + "/" + runtime.GOARCH + "\n" +
		"  author:      " + globals.Author + "\n" +
		"  homepage:    " + globals.Homepage + "\n" +
		"  license:     " + globals.License + "\n"

	out := runVersionCommand(t)
	if !strings.HasPrefix(out, want) {
		t.Errorf("report:\n%s\nwant it to start with:\n%s", out, want)
	}
}

// TestVersionCommandFlagsDevelopmentBuild is the regression test for
// the thing this command exists to prevent: a build that is not a
// release must say so. The notice used to be gated on the version
// being exactly "dev", so once untagged builds started carrying their
// commit sha it would have gone silent and an unreleased binary would
// have looked like a release.
//
//nolint:paralleltest // executes a command that reads the global rootFlags
func TestVersionCommandFlagsDevelopmentBuild(t *testing.T) {
	if !globals.IsDevVersion(globals.Version) {
		t.Skipf("test binary was stamped with release version %q",
			globals.Version)
	}

	out := runVersionCommand(t)

	if !strings.Contains(out, "development build") {
		t.Errorf("dev build did not print the development-build notice:\n%s",
			out)
	}

	if !strings.Contains(out, globals.ReleasesURL) {
		t.Errorf("development-build notice does not point at %s:\n%s",
			globals.ReleasesURL, out)
	}
}