package hook_test

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

	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/hook"
)

func TestAliasesPath_UnderCacheDir(t *testing.T) {
	dir := t.TempDir()
	orig := os.Getenv("XDG_CACHE_HOME")
	os.Setenv("XDG_CACHE_HOME", dir)
	defer os.Setenv("XDG_CACHE_HOME", orig)

	p := hook.AliasesPath()
	if !strings.HasPrefix(p, dir) {
		t.Errorf("AliasesPath should be under XDG_CACHE_HOME, got %q", p)
	}
	if !strings.HasSuffix(p, "aliases.sh") {
		t.Errorf("AliasesPath should end with aliases.sh, got %q", p)
	}
}

func TestFishAliasesPath_UnderConfigDir(t *testing.T) {
	dir := t.TempDir()
	orig := os.Getenv("XDG_CONFIG_HOME")
	os.Setenv("XDG_CONFIG_HOME", dir)
	defer os.Setenv("XDG_CONFIG_HOME", orig)

	p := hook.FishAliasesPath()
	if !strings.HasPrefix(p, dir) {
		t.Errorf("FishAliasesPath should be under XDG_CONFIG_HOME, got %q", p)
	}
	if !strings.HasSuffix(p, "netssh.fish") {
		t.Errorf("FishAliasesPath should end with netssh.fish, got %q", p)
	}
}

// TestWriteAliasFiles_ShFile verifies the bash/zsh file is always written.
func TestWriteAliasFiles_ShFile(t *testing.T) {
	cacheDir := t.TempDir()
	orig := os.Getenv("XDG_CACHE_HOME")
	os.Setenv("XDG_CACHE_HOME", cacheDir)
	defer os.Setenv("XDG_CACHE_HOME", orig)

	entries := []hook.AliasEntry{
		{Name: "web01", Host: "web01.example.com"},
		{Name: "db01", Host: "db01.example.com"},
	}
	if err := hook.WriteAliasFiles(entries); err != nil {
		t.Fatalf("WriteAliasFiles: %v", err)
	}

	data, err := os.ReadFile(hook.AliasesPath())
	if err != nil {
		t.Fatalf("aliases.sh not created: %v", err)
	}
	content := string(data)

	for _, want := range []string{
		"alias web01='netssh web01.example.com'",
		"alias db01='netssh db01.example.com'",
	} {
		if !strings.Contains(content, want) {
			t.Errorf("aliases.sh missing %q\ncontent:\n%s", want, content)
		}
	}
}

// TestWriteAliasFiles_FishFile verifies the fish file is written when fish config dir exists.
func TestWriteAliasFiles_FishFile(t *testing.T) {
	configDir := t.TempDir()
	orig := os.Getenv("XDG_CONFIG_HOME")
	os.Setenv("XDG_CONFIG_HOME", configDir)
	defer os.Setenv("XDG_CONFIG_HOME", orig)

	// Create the fish config directory so WriteAliasFiles knows fish is set up.
	fishDir := filepath.Join(configDir, "fish")
	os.MkdirAll(fishDir, 0o755)

	cacheDir := t.TempDir()
	origCache := os.Getenv("XDG_CACHE_HOME")
	os.Setenv("XDG_CACHE_HOME", cacheDir)
	defer os.Setenv("XDG_CACHE_HOME", origCache)

	entries := []hook.AliasEntry{{Name: "web01", Host: "web01.example.com"}}
	if err := hook.WriteAliasFiles(entries); err != nil {
		t.Fatalf("WriteAliasFiles: %v", err)
	}

	data, err := os.ReadFile(hook.FishAliasesPath())
	if err != nil {
		t.Fatalf("netssh.fish not created: %v", err)
	}
	if !strings.Contains(string(data), "alias web01 'netssh web01.example.com'") {
		t.Errorf("fish alias file missing expected line\ncontent:\n%s", string(data))
	}
}

// TestWriteAliasFiles_SkipsFishWhenNotConfigured verifies that fish file is NOT written
// when fish is not set up (no ~/.config/fish directory).
func TestWriteAliasFiles_SkipsFishWhenNotConfigured(t *testing.T) {
	configDir := t.TempDir() // no fish subdir
	orig := os.Getenv("XDG_CONFIG_HOME")
	os.Setenv("XDG_CONFIG_HOME", configDir)
	defer os.Setenv("XDG_CONFIG_HOME", orig)

	cacheDir := t.TempDir()
	origCache := os.Getenv("XDG_CACHE_HOME")
	os.Setenv("XDG_CACHE_HOME", cacheDir)
	defer os.Setenv("XDG_CACHE_HOME", origCache)

	entries := []hook.AliasEntry{{Name: "web01", Host: "web01.example.com"}}
	if err := hook.WriteAliasFiles(entries); err != nil {
		t.Fatalf("WriteAliasFiles: %v", err)
	}

	if _, err := os.Stat(hook.FishAliasesPath()); err == nil {
		t.Error("fish alias file should not be created when fish is not configured")
	}
}

// TestWriteAliasFiles_EmptyEntries verifies an empty (but valid) file is written.
func TestWriteAliasFiles_EmptyEntries(t *testing.T) {
	cacheDir := t.TempDir()
	orig := os.Getenv("XDG_CACHE_HOME")
	os.Setenv("XDG_CACHE_HOME", cacheDir)
	defer os.Setenv("XDG_CACHE_HOME", orig)

	if err := hook.WriteAliasFiles(nil); err != nil {
		t.Fatalf("WriteAliasFiles with nil entries: %v", err)
	}
	data, err := os.ReadFile(hook.AliasesPath())
	if err != nil {
		t.Fatalf("aliases.sh not created: %v", err)
	}
	// Should contain only the header comment, no alias lines.
	if strings.Contains(string(data), "alias ") {
		t.Error("aliases.sh should have no alias lines for empty entries")
	}
}

// --- InstallAliasesSource ---

func TestInstallAliasesSource_Fresh(t *testing.T) {
	profile := writeProfile(t, "existing line\n")

	installed, err := hook.InstallAliasesSource(profile)
	if err != nil {
		t.Fatalf("InstallAliasesSource: %v", err)
	}
	if !installed {
		t.Error("should report installed=true on first install")
	}

	data, _ := os.ReadFile(profile)
	if !strings.Contains(string(data), hook.AliasesMarker) {
		t.Error("profile should contain aliases source line")
	}
}

func TestInstallAliasesSource_Idempotent(t *testing.T) {
	profile := writeProfile(t, "")

	hook.InstallAliasesSource(profile)
	installed, err := hook.InstallAliasesSource(profile)
	if err != nil {
		t.Fatalf("second InstallAliasesSource: %v", err)
	}
	if installed {
		t.Error("second call should report installed=false")
	}

	data, _ := os.ReadFile(profile)
	if count := strings.Count(string(data), hook.AliasesMarker); count != 1 {
		t.Errorf("aliases source line should appear once, got %d", count)
	}
}

// TestUninstall_AlsoRemovesAliasesSourceLine verifies that Uninstall removes both lines.
func TestUninstall_AlsoRemovesAliasesSourceLine(t *testing.T) {
	content := "export PATH=$PATH\n" +
		hook.Line + "\n" +
		hook.AliasesSourceLine + "\n" +
		"export FOO=bar\n"
	profile := writeProfile(t, content)

	removed, err := hook.Uninstall(profile)
	if err != nil {
		t.Fatalf("Uninstall: %v", err)
	}
	if !removed {
		t.Error("should report removed=true")
	}

	data, _ := os.ReadFile(profile)
	s := string(data)
	if strings.Contains(s, hook.Marker) {
		t.Error("shell-init line should be removed")
	}
	if strings.Contains(s, hook.AliasesMarker) {
		t.Error("aliases source line should be removed")
	}
	if !strings.Contains(s, "export PATH") || !strings.Contains(s, "export FOO") {
		t.Error("other content should be preserved")
	}
}