package config

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

func setupTestConfig(t *testing.T) (string, func()) {
	t.Helper()
	
	// Create a temporary directory for the test config
	tempDir, err := os.MkdirTemp("", "config-test-")
	if err != nil {
		t.Fatalf("Failed to create temp directory: %v", err)
	}
	
	// Get the original config file path
	originalConfigFile := configFile
	
	// Set the config file path to the temp directory
	configFile = filepath.Join(tempDir, "config.yaml")
	
	// Create a cleanup function
	cleanup := func() {
		configFile = originalConfigFile
		os.RemoveAll(tempDir)
	}
	
	return tempDir, cleanup
}

func TestInit(t *testing.T) {
	// Save original values
	originalConfigFile := configFile
	originalGlobalConfig := GlobalConfig
	
	// Reset viper to ensure a clean state
	ResetViper()
	
	// Setup test config
	_, cleanup := setupTestConfig(t)
	defer cleanup()
	
	// Reset global config
	GlobalConfig = &Config{}
	
	// Initialize the config
	err := Init()
	if err != nil {
		t.Fatalf("Init failed: %v", err)
	}
	
	// Check default values
	if GlobalConfig.DefaultRemote != "origin" {
		t.Errorf("Expected default remote to be 'origin', got '%s'", GlobalConfig.DefaultRemote)
	}
	
	if GlobalConfig.DefaultBranch != "main" {
		t.Errorf("Expected default branch to be 'main', got '%s'", GlobalConfig.DefaultBranch)
	}
	
	if GlobalConfig.GitHubURL != "https://api.github.com" {
		t.Errorf("Expected GitHub URL to be 'https://api.github.com', got '%s'", GlobalConfig.GitHubURL)
	}
	
	if GlobalConfig.GitHubToken != "" {
		t.Errorf("Expected GitHub token to be empty, got '%s'", GlobalConfig.GitHubToken)
	}
	
	// Restore original values
	configFile = originalConfigFile
	GlobalConfig = originalGlobalConfig
}

func TestSave(t *testing.T) {
	// Save original values
	originalConfigFile := configFile
	originalGlobalConfig := GlobalConfig
	
	// Reset viper to ensure a clean state
	ResetViper()
	
	// Setup test config
	_, cleanup := setupTestConfig(t)
	defer cleanup()
	
	// Reset global config
	GlobalConfig = &Config{}
	
	// Initialize the config
	if err := Init(); err != nil {
		t.Fatalf("Init failed: %v", err)
	}
	
	// Set some values
	Set("github_token", "test-token")
	Set("default_branch", "develop")
	Set("default_remote", "upstream")
	
	// Save the config
	err := Save()
	if err != nil {
		t.Fatalf("Save failed: %v", err)
	}
	
	// Check that the config file exists
	if _, err := os.Stat(configFile); os.IsNotExist(err) {
		t.Error("Config file does not exist")
	}
	
	// Reset viper again
	ResetViper()
	
	// Reset global config
	GlobalConfig = &Config{}
	
	// Re-initialize the config to load from file
	if err := Init(); err != nil {
		t.Fatalf("Init failed: %v", err)
	}
	
	// Check values
	if GlobalConfig.GitHubToken != "test-token" {
		t.Errorf("Expected GitHub token to be 'test-token', got '%s'", GlobalConfig.GitHubToken)
	}
	
	if GlobalConfig.DefaultBranch != "develop" {
		t.Errorf("Expected default branch to be 'develop', got '%s'", GlobalConfig.DefaultBranch)
	}
	
	if GlobalConfig.DefaultRemote != "upstream" {
		t.Errorf("Expected default remote to be 'upstream', got '%s'", GlobalConfig.DefaultRemote)
	}
	
	// Restore original values
	configFile = originalConfigFile
	GlobalConfig = originalGlobalConfig
}

func TestSet(t *testing.T) {
	// Save original values
	originalConfigFile := configFile
	originalGlobalConfig := GlobalConfig
	
	// Reset viper to ensure a clean state
	ResetViper()
	
	// Setup test config
	_, cleanup := setupTestConfig(t)
	defer cleanup()
	
	// Reset global config
	GlobalConfig = &Config{}
	
	// Initialize the config
	if err := Init(); err != nil {
		t.Fatalf("Init failed: %v", err)
	}
	
	// Set a GitHub token
	Set("github_token", "test-token")
	
	// Check the value
	if GlobalConfig.GitHubToken != "test-token" {
		t.Errorf("Expected GitHub token to be 'test-token', got '%s'", GlobalConfig.GitHubToken)
	}
	
	// Set a default branch
	Set("default_branch", "develop")
	
	// Check the value
	if GlobalConfig.DefaultBranch != "develop" {
		t.Errorf("Expected default branch to be 'develop', got '%s'", GlobalConfig.DefaultBranch)
	}
	
	// Set a default remote
	Set("default_remote", "upstream")
	
	// Check the value
	if GlobalConfig.DefaultRemote != "upstream" {
		t.Errorf("Expected default remote to be 'upstream', got '%s'", GlobalConfig.DefaultRemote)
	}
	
	// Restore original values
	configFile = originalConfigFile
	GlobalConfig = originalGlobalConfig
}

func TestGet(t *testing.T) {
	// Save original values
	originalConfigFile := configFile
	originalGlobalConfig := GlobalConfig
	
	// Reset viper to ensure a clean state
	ResetViper()
	
	// Setup test config
	_, cleanup := setupTestConfig(t)
	defer cleanup()
	
	// Reset global config
	GlobalConfig = &Config{}
	
	// Initialize the config
	if err := Init(); err != nil {
		t.Fatalf("Init failed: %v", err)
	}
	
	// Set some values
	Set("github_token", "test-token")
	Set("default_branch", "develop")
	Set("default_remote", "upstream")
	
	// Get the values
	token := Get("github_token")
	if token != "test-token" {
		t.Errorf("Expected GitHub token to be 'test-token', got '%v'", token)
	}
	
	branch := Get("default_branch")
	if branch != "develop" {
		t.Errorf("Expected default branch to be 'develop', got '%v'", branch)
	}
	
	remote := Get("default_remote")
	if remote != "upstream" {
		t.Errorf("Expected default remote to be 'upstream', got '%v'", remote)
	}
	
	// Restore original values
	configFile = originalConfigFile
	GlobalConfig = originalGlobalConfig
}

func TestGetConfigFile(t *testing.T) {
	// Save original values
	originalConfigFile := configFile
	originalGlobalConfig := GlobalConfig
	
	// Reset viper to ensure a clean state
	ResetViper()
	
	// Setup test config
	_, cleanup := setupTestConfig(t)
	defer cleanup()
	
	// Reset global config
	GlobalConfig = &Config{}
	
	// Initialize the config
	if err := Init(); err != nil {
		t.Fatalf("Init failed: %v", err)
	}
	
	// Get the config file path
	configFilePath := GetConfigFile()
	
	// Check that it matches the expected path
	if configFilePath != configFile {
		t.Errorf("Expected config file path to be '%s', got '%s'", configFile, configFilePath)
	}
	
	// Restore original values
	configFile = originalConfigFile
	GlobalConfig = originalGlobalConfig
}