package cmd

import (
	"bytes"
	"io"
	"os"
	"testing"
)

// TestLoginCommand tests the login CLI command
func TestLoginCommand(t *testing.T) {
	t.Parallel()

	// Create a temporary config file
	tmpDir := t.TempDir()
	configPath := tmpDir + "/config.yaml"

	configContent := `
api:
  base_url: "http://localhost:8080"
  timeout: 30s
`
	err := os.WriteFile(configPath, []byte(configContent), 0644)
	if err != nil {
		t.Fatalf("Failed to write config: %v", err)
	}

	// Set config path environment variable
	os.Setenv("POP_CONFIG_PATH", configPath)
	defer os.Unsetenv("POP_CONFIG_PATH")

	// Create root command with login subcommand
	rootCmd := NewRootCmd()
	rootCmd.SetArgs([]string{"login"})

	// Capture output
	var buf bytes.Buffer
	rootCmd.SetOut(&buf)
	rootCmd.SetErr(&buf)

	// Execute command
	err = rootCmd.Execute()
	if err != nil {
		// Login requires interactive input, so error is expected in non-interactive mode
		t.Logf("Login command executed with error (expected in non-interactive mode): %v", err)
	}

	// Verify command ran
	output := buf.String()
	t.Logf("Command output: %s", output)
}

// TestLogoutCommand tests the logout CLI command
func TestLogoutCommand(t *testing.T) {
	t.Parallel()

	// Create a temporary config file
	tmpDir := t.TempDir()
	configPath := tmpDir + "/config.yaml"

	err := os.WriteFile(configPath, []byte("{}"), 0644)
	if err != nil {
		t.Fatalf("Failed to write config: %v", err)
	}

	os.Setenv("POP_CONFIG_PATH", configPath)
	defer os.Unsetenv("POP_CONFIG_PATH")

	// Create root command with logout subcommand
	rootCmd := NewRootCmd()
	rootCmd.SetArgs([]string{"logout"})

	// Capture output
	var buf bytes.Buffer
	rootCmd.SetOut(&buf)
	rootCmd.SetErr(&buf)

	// Execute command
	err = rootCmd.Execute()
	// Logout may fail if no session exists, which is expected
	if err != nil {
		t.Logf("Logout command executed with error (expected if no session): %v", err)
	}
}

// TestSessionCommand tests the session CLI command
func TestSessionCommand(t *testing.T) {
	t.Parallel()

	// Create a temporary config file
	tmpDir := t.TempDir()
	configPath := tmpDir + "/config.yaml"

	err := os.WriteFile(configPath, []byte("{}"), 0644)
	if err != nil {
		t.Fatalf("Failed to write config: %v", err)
	}

	os.Setenv("POP_CONFIG_PATH", configPath)
	defer os.Unsetenv("POP_CONFIG_PATH")

	// Create root command with session subcommand
	rootCmd := NewRootCmd()
	rootCmd.SetArgs([]string{"session"})

	// Capture output
	var buf bytes.Buffer
	rootCmd.SetOut(&buf)
	rootCmd.SetErr(&buf)

	// Execute command
	err = rootCmd.Execute()
	// Session may fail if no active session, which is expected
	if err != nil {
		t.Logf("Session command executed with error (expected if no session): %v", err)
	}
}

// TestRootCommandHelp tests the help output
func TestRootCommandHelp(t *testing.T) {
	t.Parallel()

	rootCmd := NewRootCmd()
	rootCmd.SetArgs([]string{"--help"})

	var buf bytes.Buffer
	rootCmd.SetOut(&buf)

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

	output, _ := io.ReadAll(&buf)
	if len(output) == 0 {
		t.Error("Help output is empty")
	}

	// Verify help contains expected commands
	helpText := string(output)
	expectedCommands := []string{"login", "logout", "session", "mail", "contact", "attachment", "folder", "draft"}
	for _, cmd := range expectedCommands {
		if !contains(helpText, cmd) {
			t.Errorf("Help output missing command: %s", cmd)
		}
	}
}

// Helper function to check if string contains substring
func contains(s, substr string) bool {
	return len(s) > 0 && len(substr) > 0 && (s == substr || len(s) > len(substr) && (s[:len(substr)] == substr || contains(s[1:], substr)))
}