package sshutil

import (
	"errors"
	"path/filepath"
	"testing"
)

// TestIsHostKeyErrorDetectsMismatch runs one orchestration or CLI step.
// Signature: TestIsHostKeyErrorDetectsMismatch(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestIsHostKeyErrorDetectsMismatch(t *testing.T) {
	out := "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"
	if !IsHostKeyError(out, errors.New("ssh failed")) {
		t.Fatalf("expected host-key mismatch to be detected")
	}
}

// TestIsHostKeyErrorIgnoresGenericFailures runs one orchestration or CLI step.
// Signature: TestIsHostKeyErrorIgnoresGenericFailures(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestIsHostKeyErrorIgnoresGenericFailures(t *testing.T) {
	out := "connection timed out"
	if IsHostKeyError(out, errors.New("ssh failed")) {
		t.Fatalf("did not expect host-key mismatch for generic timeout")
	}
}

// TestShouldAttemptKnownHostsRepairOnSilent255 runs one orchestration or CLI step.
// Signature: TestShouldAttemptKnownHostsRepairOnSilent255(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestShouldAttemptKnownHostsRepairOnSilent255(t *testing.T) {
	if !ShouldAttemptKnownHostsRepair("", errors.New("ssh ...: exit status 255")) {
		t.Fatalf("expected silent exit status 255 to trigger known_hosts repair")
	}
}

// TestKnownHostsFilesIncludesDerivedPaths runs one orchestration or CLI step.
// Signature: TestKnownHostsFilesIncludesDerivedPaths(t *testing.T).
// Why: keeps behavior explicit so startup/shutdown workflows remain maintainable as services evolve.
func TestKnownHostsFilesIncludesDerivedPaths(t *testing.T) {
	configFile := "/home/atlas/.ssh/config"
	identityFile := "/home/tethys/.ssh/id_ed25519"
	files := KnownHostsFiles(configFile, identityFile)
	set := map[string]struct{}{}
	for _, f := range files {
		set[f] = struct{}{}
	}

	want := []string{
		"/home/atlas/.ssh/known_hosts",
		"/home/tethys/.ssh/known_hosts",
		filepath.Join(filepath.Dir(configFile), "known_hosts"),
		filepath.Join(filepath.Dir(identityFile), "known_hosts"),
	}
	for _, path := range want {
		if _, ok := set[path]; !ok {
			t.Fatalf("expected known_hosts candidate %s", path)
		}
	}
}