package config

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

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestLoadConfig(t *testing.T) {
	// 创建临时配置文件
	tempDir := t.TempDir()
	configPath := filepath.Join(tempDir, "test_config.toml")

	configContent := `
[server]
ip = "127.0.0.1"
port = 9090

[log]
level = "debug"
development = true
encoding = "console"
output_paths = ["stdout", "test.log"]
log_dir = "./test_logs"

[audit]
enabled = true
database_path = "./test_audit.db"
retention_days = 30
buffer_size = 500

[storage]
type = "db"
config_path = "./test_config.toml"
sql_base_dir = "./test_sql"
database_path = "./test_storage.db"
data_file = "./test_data.toml"
`

	err := os.WriteFile(configPath, []byte(configContent), 0644)
	require.NoError(t, err)

	// 加载配置
	cfg, err := LoadConfig(configPath)
	require.NoError(t, err)

	// 验证配置值
	assert.Equal(t, "127.0.0.1", cfg.Server.Ip)
	assert.Equal(t, 9090, cfg.Server.Port)

	assert.Equal(t, "debug", cfg.Log.Level)
	assert.True(t, cfg.Log.Development)
	assert.Equal(t, "console", cfg.Log.Encoding)
	assert.Equal(t, []string{"stdout", "test.log"}, cfg.Log.OutputPaths)
	assert.Equal(t, "./test_logs", cfg.Log.LogDir)

	assert.True(t, cfg.Audit.Enabled)
	assert.Equal(t, "./test_audit.db", cfg.Audit.DatabasePath)
	assert.Equal(t, 30, cfg.Audit.RetentionDays)
	assert.Equal(t, 500, cfg.Audit.BufferSize)

	assert.Equal(t, "db", cfg.Storage.Type)
	assert.Equal(t, "./test_config.toml", cfg.Storage.ConfigPath)
	assert.Equal(t, "./test_sql", cfg.Storage.SQLBaseDir)
	assert.Equal(t, "./test_storage.db", cfg.Storage.DatabasePath)
	assert.Equal(t, "./test_data.toml", cfg.Storage.DataFile)
}

func TestSetDefaults(t *testing.T) {
	cfg := &AppConfig{}

	// 设置默认值
	cfg.SetDefaults()

	// 验证默认值
	assert.Equal(t, 8080, cfg.Server.Port)
	assert.Equal(t, "info", cfg.Log.Level)
	assert.Equal(t, "json", cfg.Log.Encoding)
	assert.Equal(t, []string{"stdout"}, cfg.Log.OutputPaths)
	assert.Equal(t, "./DBconfig/logs", cfg.Log.LogDir)

	assert.Equal(t, "./DBconfig/audit.db", cfg.Audit.DatabasePath)
	assert.Equal(t, 90, cfg.Audit.RetentionDays)
	assert.Equal(t, 1000, cfg.Audit.BufferSize)

	assert.Equal(t, "./DBconfig/sqlfiles", cfg.Storage.SQLBaseDir)
	assert.Equal(t, "./DBconfig/data.toml", cfg.Storage.DataFile)
}

func TestValidate(t *testing.T) {
	// 有效的配置
	cfg := &AppConfig{}
	cfg.SetDefaults()

	err := cfg.Validate()
	assert.NoError(t, err)

	// 无效的端口
	invalidCfg := &AppConfig{}
	invalidCfg.SetDefaults()
	invalidCfg.Server.Port = 99999
	err = invalidCfg.Validate()
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "invalid server port")

	// 无效的日志级别
	invalidCfg2 := &AppConfig{}
	invalidCfg2.SetDefaults()
	invalidCfg2.Log.Level = "invalid"
	err = invalidCfg2.Validate()
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "invalid log level")

	// 无效的编码
	invalidCfg3 := &AppConfig{}
	invalidCfg3.SetDefaults()
	invalidCfg3.Log.Encoding = "invalid"
	err = invalidCfg3.Validate()
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "invalid log encoding")
}

func TestGetLogLevel(t *testing.T) {
	logConfig := &LogConfig{}

	// 测试各种日志级别
	testCases := []struct {
		level    string
		expected string
	}{
		{"debug", "debug"},
		{"info", "info"},
		{"warn", "warn"},
		{"warning", "warn"},
		{"error", "error"},
		{"fatal", "fatal"},
		{"invalid", "info"}, // 默认值
	}

	for _, tc := range testCases {
		logConfig.Level = tc.level
		level := logConfig.GetLogLevel()
		assert.Equal(t, tc.expected, level.String())
	}
}

func TestGetOutputPaths(t *testing.T) {
	logConfig := &LogConfig{
		LogDir:      "/tmp/logs",
		OutputPaths: []string{"stdout", "app.log", "C:/absolute/path.log"},
	}

	paths := logConfig.GetOutputPaths()

	assert.Contains(t, paths, "stdout")
	assert.Contains(t, paths, "C:/absolute/path.log")
	// 相对路径应该被转换为绝对路径
	expectedPath := filepath.Join("/tmp/logs", "app.log")
	found := false
	for _, path := range paths {
		if path == expectedPath {
			found = true
			break
		}
	}
	assert.True(t, found, "相对路径应该被转换为绝对路径，期望: %s, 实际: %v", expectedPath, paths)
}

func TestCreateDirectories(t *testing.T) {
	tempDir := t.TempDir()

	cfg := &AppConfig{}
	cfg.SetDefaults()

	// 修改路径为临时目录
	cfg.Log.LogDir = filepath.Join(tempDir, "logs")
	cfg.Audit.DatabasePath = filepath.Join(tempDir, "audit.db")
	cfg.Storage.SQLBaseDir = filepath.Join(tempDir, "sql")
	cfg.Storage.DataFile = filepath.Join(tempDir, "data.toml")

	// 创建目录
	err := cfg.CreateDirectories()
	assert.NoError(t, err)

	// 验证目录是否创建成功
	dirs := []string{
		cfg.Log.LogDir,
		filepath.Dir(cfg.Audit.DatabasePath),
		cfg.Storage.SQLBaseDir,
		filepath.Dir(cfg.Storage.DataFile),
	}

	for _, dir := range dirs {
		_, err := os.Stat(dir)
		assert.NoError(t, err, "目录应该被创建: %s", dir)
	}
}