package keymgr

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

	"ssh-access-tui/internal/model"
)

// extract7z unpacks archivePath (encrypted with password) into a fresh temp
// dir and returns that dir. Skips the test if 7z is unavailable rather than
// failing, since this is exercising an external tool, not this package.
func extract7z(t *testing.T, archivePath, password string) string {
	t.Helper()
	if _, err := exec.LookPath("7z"); err != nil {
		t.Skip("7z not available in PATH")
	}
	dest := t.TempDir()
	cmd := exec.Command("7z", "x", "-p"+password, "-o"+dest, archivePath)
	if out, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("7z x: %v: %s", err, out)
	}
	return dest
}

// TestBuildUserArchive_ProxyJumpSelectsRenderer is a smoke test verifying
// that BuildUserArchive's new proxyJump parameter actually switches which
// client config / instructions renderer gets packed, end to end through the
// real ssh-keygen/7z tools (see internal/keymgr package doc: the private key
// only exists transiently on disk for this one operation).
func TestBuildUserArchive_ProxyJumpSelectsRenderer(t *testing.T) {
	if _, err := exec.LookPath("ssh-keygen"); err != nil {
		t.Skip("ssh-keygen not available in PATH")
	}
	if _, err := exec.LookPath("7z"); err != nil {
		t.Skip("7z not available in PATH")
	}

	forwards := []model.Forward{
		{HostName: "db-prod-1", Address: "10.0.0.5", Port: 22, ServiceName: "ssh"},
	}

	tests := []struct {
		name      string
		proxyJump bool
	}{
		{"LocalForward mode", false},
		{"ProxyJump mode", true},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			scratch := t.TempDir()
			outDir := t.TempDir()
			username := "test-user"
			password := "TestPassw0rd123"

			res, err := BuildUserArchive(scratch, outDir, "bastion.example.com", 2222, username, password, forwards, tt.proxyJump)
			if err != nil {
				t.Fatalf("BuildUserArchive: %v", err)
			}
			if res.ArchivePath == "" {
				t.Fatalf("expected non-empty archive path")
			}
			if _, err := os.Stat(res.ArchivePath); err != nil {
				t.Fatalf("archive not found on disk: %v", err)
			}

			// Scratch dir must be wiped (private key must not linger).
			if entries, err := os.ReadDir(filepath.Join(scratch, username)); err == nil {
				t.Fatalf("expected scratch dir to be wiped, still has entries: %v", entries)
			}

			extractedDir := extract7z(t, res.ArchivePath, password)
			cfgBytes, err := os.ReadFile(filepath.Join(extractedDir, "config"))
			if err != nil {
				t.Fatalf("read extracted config: %v", err)
			}
			cfg := string(cfgBytes)

			if tt.proxyJump {
				if strings.Contains(cfg, "LocalForward") {
					t.Errorf("proxyJump=true archive must not contain LocalForward, got config:\n%s", cfg)
				}
				if !strings.Contains(cfg, "ProxyJump jump") {
					t.Errorf("proxyJump=true archive must contain ProxyJump jump, got config:\n%s", cfg)
				}
			} else {
				if strings.Contains(cfg, "ProxyJump") {
					t.Errorf("proxyJump=false archive must not contain ProxyJump, got config:\n%s", cfg)
				}
				if !strings.Contains(cfg, "LocalForward") {
					t.Errorf("proxyJump=false archive must contain LocalForward, got config:\n%s", cfg)
				}
			}
		})
	}
}