package main

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

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

func uninstallFixture(t *testing.T) (home string) {
	t.Helper()
	home = t.TempDir()
	t.Setenv("HOME", home)
	t.Setenv("ZDOTDIR", home)
	t.Setenv("XDG_CONFIG_HOME", filepath.Join(home, ".config"))
	t.Setenv("XDG_CACHE_HOME", filepath.Join(home, ".cache"))
	t.Setenv("ZSH", "")
	t.Setenv("ZSH_CACHE_DIR", "")
	t.Setenv("NETSSH_SHELL_ALIAS", "")
	t.Setenv("NETSSH_CACHE_PATH", "")
	t.Setenv("PATH", filepath.Join(home, "nobin"))
	files := map[string]string{
		".bashrc":                      "export KEEP=1\n# >>> netssh >>>\nnetssh shell-init\n# <<< netssh <<<\n",
		".zshrc":                       "plugins=(git)\nnetssh shell-init  # netssh cache auto-refresh\nsource ~/.cache/netssh/aliases.sh 2>/dev/null  # netssh aliases\n",
		".profile":                     "export UNRELATED=1\n",
		".config/netssh.yaml":          "netbox:\n  url: \"https://netbox.example.com\"\n  token: \"secret\"\nshell:\n  alias: \"j\"\n",
		".config/netssh/notes/abc.txt": "note",
		".cache/netssh/hosts.json":     "{}",
		".cache/netssh/instances-0011/hosts.json":         "{}",
		".local/share/bash-completion/completions/netssh": "# bash completion for netssh",
		".zfunc/_netssh": hook.ZshCompletionScript,
		".zfunc/_j":      "#compdef j\n# netssh command alias completion — generated automatically\n",
		".zfunc/_other":  "#compdef other\n",
	}
	for name, content := range files {
		path := filepath.Join(home, name)
		if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
			t.Fatal(err)
		}
	}
	return home
}

func runUninstall(t *testing.T, args ...string) string {
	t.Helper()
	cmd := rootCmd()
	var out strings.Builder
	cmd.SetOut(&out)
	cmd.SetArgs(append([]string{"uninstall"}, args...))
	if err := cmd.Execute(); err != nil {
		t.Fatalf("uninstall: %v\n%s", err, out.String())
	}
	return out.String()
}

func TestUninstallRemovesEverythingAndBacksUpConfig(t *testing.T) {
	home := uninstallFixture(t)
	if out := runUninstall(t, "--dry-run"); !strings.Contains(out, ".zshrc") || strings.Contains(out, ".profile") {
		t.Fatalf("plan:\n%s", out)
	}
	if _, err := os.Stat(filepath.Join(home, ".cache", "netssh")); err != nil {
		t.Fatal("dry run removed files")
	}
	runUninstall(t, "--yes")

	for name, want := range map[string]string{".bashrc": "export KEEP=1\n", ".zshrc": "plugins=(git)\n", ".profile": "export UNRELATED=1\n"} {
		data, _ := os.ReadFile(filepath.Join(home, name))
		if string(data) != want {
			t.Errorf("%s: %q", name, data)
		}
	}
	for _, gone := range []string{".cache/netssh", ".config/netssh.yaml", ".config/netssh", ".zfunc/_netssh", ".zfunc/_j", ".local/share/bash-completion/completions/netssh"} {
		if _, err := os.Stat(filepath.Join(home, gone)); !os.IsNotExist(err) {
			t.Errorf("%s not removed: %v", gone, err)
		}
	}
	if _, err := os.Stat(filepath.Join(home, ".zfunc", "_other")); err != nil {
		t.Error("unrelated completion removed")
	}
	backups, _ := filepath.Glob(filepath.Join(home, ".config", "netssh.yaml.backup-*"))
	if len(backups) != 1 {
		t.Fatalf("backups: %v", backups)
	}
	if info, _ := os.Stat(backups[0]); info.Mode().Perm() != 0o600 {
		t.Error("backup with token is not private")
	}
}

func TestUninstallKeepConfig(t *testing.T) {
	home := uninstallFixture(t)
	runUninstall(t, "--yes", "--keep-config")
	for _, kept := range []string{".config/netssh.yaml", ".config/netssh/notes/abc.txt"} {
		if _, err := os.Stat(filepath.Join(home, kept)); err != nil {
			t.Errorf("%s removed", kept)
		}
	}
	if _, err := os.Stat(filepath.Join(home, ".cache", "netssh")); !os.IsNotExist(err) {
		t.Error("cache kept")
	}
}

func TestUninstallAbortsWithoutConfirmation(t *testing.T) {
	home := uninstallFixture(t)
	cmd := rootCmd()
	cmd.SetOut(&strings.Builder{})
	cmd.SetIn(strings.NewReader("n\n"))
	cmd.SetArgs([]string{"uninstall"})
	if err := cmd.Execute(); err == nil {
		t.Fatal("no confirmation required")
	}
	if _, err := os.Stat(filepath.Join(home, ".config", "netssh.yaml")); err != nil {
		t.Fatal("config removed without confirmation")
	}
}