package cmd

import (
	"fmt"
	"io"
	"os"
	"strings"
	"testing"

	"github.com/spf13/cobra"
	"github.com/iwasforcedtobehere/git-automation-cli/internal/config"
)

// MockVersionService is a mock implementation of the version service
type MockVersionService struct {
	getVersionFunc func() string
}

func (m *MockVersionService) GetVersion() string {
	if m.getVersionFunc != nil {
		return m.getVersionFunc()
	}
	return "1.0.0"
}

// MockConfigService is a mock implementation of the config service
type MockConfigService struct {
	initFunc func() error
}

func (m *MockConfigService) Init() error {
	if m.initFunc != nil {
		return m.initFunc()
	}
	return nil
}

func TestExecute(t *testing.T) {
	// Save original stdout
	originalStdout := os.Stdout
	defer func() {
		os.Stdout = originalStdout
	}()

	// Temporarily redirect stdout to capture output
	r, w, _ := os.Pipe()
	os.Stdout = w

	// Execute root command
	Execute()

	// Restore stdout
	w.Close()
	os.Stdout = originalStdout
	out, _ := io.ReadAll(r)

	// Check that help was displayed
	output := string(out)
	if !strings.Contains(output, "Git Automation CLI is a fast, practical tool to automate frequent Git workflows") {
		t.Errorf("Expected help to be displayed, got %q", output)
	}
}

func TestVersionCmd(t *testing.T) {
	// Create mock version service
	mockVersionService := &MockVersionService{
		getVersionFunc: func() string {
			return "1.0.0-test"
		},
	}

	// Temporarily redirect stdout to capture output
	oldStdout := os.Stdout
	r, w, _ := os.Pipe()
	os.Stdout = w

	// Create a command
	cmd := &cobra.Command{
		Use: "test",
		Run: func(cmd *cobra.Command, args []string) {
			// Use mock version service instead of real one
			versionStr := mockVersionService.GetVersion()
			fmt.Printf("gitauto version %s\n", versionStr)
		},
	}

	// Execute command
	err := cmd.Execute()

	// Restore stdout
	w.Close()
	os.Stdout = oldStdout
	out, _ := io.ReadAll(r)

	// Check error
	if err != nil {
		t.Errorf("Execute() error = %v", err)
		return
	}

	// Check output
	output := string(out)
	expected := "gitauto version 1.0.0-test\n"
	if output != expected {
		t.Errorf("Execute() output = %q, want %q", output, expected)
	}
}

func TestRootCmdPersistentPreRun(t *testing.T) {
	// Save original config
	originalConfig := config.GlobalConfig
	defer func() {
		config.GlobalConfig = originalConfig
	}()

	// Create mock config service
	mockConfigService := &MockConfigService{
		initFunc: func() error {
			return nil
		},
	}

	// Set up test config
	config.GlobalConfig = &config.Config{
		Verbose: false,
		DryRun:  false,
	}

	// Create a command with PersistentPreRun
	cmd := &cobra.Command{
		Use: "test",
		PersistentPreRun: func(cmd *cobra.Command, args []string) {
			// Initialize configuration
			if err := mockConfigService.Init(); err != nil {
				panic(err)
			}

			// Override config with command line flags
			if verbose {
				config.Set("verbose", true)
			}
			if dryRun {
				config.Set("dry_run", true)
			}
		},
		Run: func(cmd *cobra.Command, args []string) {
			// Do nothing
		},
	}

	// Set verbose flag
	verbose = true

	// Execute command
	err := cmd.Execute()

	// Check error
	if err != nil {
		t.Errorf("Execute() error = %v", err)
		return
	}

	// Check that config was updated
	if !config.GlobalConfig.Verbose {
		t.Errorf("Expected Verbose to be true, got false")
	}
}

func TestRootCmdFlags(t *testing.T) {
	// Test that verbose and dry-run flags are properly set
	cmd := &cobra.Command{
		Use: "test",
		Run: func(cmd *cobra.Command, args []string) {
			// Do nothing
		},
	}

	// Add flags like in rootCmd
	cmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose output")
	cmd.PersistentFlags().BoolVar(&dryRun, "dry-run", false, "dry run mode (no changes made)")

	// Set verbose flag
	err := cmd.ParseFlags([]string{"--verbose"})
	if err != nil {
		t.Errorf("ParseFlags() error = %v", err)
		return
	}

	if !verbose {
		t.Errorf("Expected verbose to be true, got false")
	}

	// Reset flags
	verbose = false
	dryRun = false

	// Set dry-run flag
	err = cmd.ParseFlags([]string{"--dry-run"})
	if err != nil {
		t.Errorf("ParseFlags() error = %v", err)
		return
	}

	if !dryRun {
		t.Errorf("Expected dryRun to be true, got false")
	}

	// Reset flags
	verbose = false
	dryRun = false

	// Set both flags
	err = cmd.ParseFlags([]string{"--verbose", "--dry-run"})
	if err != nil {
		t.Errorf("ParseFlags() error = %v", err)
		return
	}

	if !verbose {
		t.Errorf("Expected verbose to be true, got false")
	}
	if !dryRun {
		t.Errorf("Expected dryRun to be true, got false")
	}
}