package config

import (
	"os"
	"path"
	"testing"

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

func TestListeningModeString(t *testing.T) {
	assert.Equal(t, "net", ModeNet.String(), "Unexpected string value")
	assert.Equal(t, "unix", ModeUnix.String(), "Unexpected string value")
}

// Test returning a default config when providing a path that does not exist
func TestDefault(t *testing.T) {
	conf, err := New("/this/path/does/not/exist")
	if assert.Nil(t, err, "Unexpected error") {
		assert.Equal(t, defaultConfig, *conf, "Unexpected config")
	}
}

// Test creating a valid config (net mode)
func TestOKNet(t *testing.T) {
	tmpPath := t.TempDir()
	content := `{
	"log": {
		"level": "error"
	},
	"server": {
		"mode": "net",
		"host": "127.0.0.1",
		"port": 8888
	}
}`
	confPath := path.Join(tmpPath, "config.json")
	require.Nil(t, os.WriteFile(confPath, []byte(content), 0o644), "Failed to write config")

	expectedConf := AppConfig{
		LogLevel:   logrus.ErrorLevel,
		ServerMode: ModeNet,
		Host:       "127.0.0.1",
		Port:       8888,
	}
	conf, err := New(confPath)
	if assert.Nil(t, err, "Unexpected error") {
		assert.Equal(t, expectedConf, *conf, "Unexpected config")
	}
}

// Test creating a valid config (unix mode)
func TestOKUnix(t *testing.T) {
	tmpPath := t.TempDir()
	content := `{
	"log": {
		"level": "error"
	},
	"server": {
		"mode": "unix",
		"sock": "/run/toto.sock"
	}
}`
	confPath := path.Join(tmpPath, "config.json")
	require.Nil(t, os.WriteFile(confPath, []byte(content), 0o644), "Failed to write config")

	expectedConf := AppConfig{
		LogLevel:   logrus.ErrorLevel,
		ServerMode: ModeUnix,
		SockPath:   "/run/toto.sock",
	}
	conf, err := New(confPath)
	if assert.Nil(t, err, "Unexpected error") {
		assert.Equal(t, expectedConf, *conf, "Unexpected config")
	}
}

// Test creating a valid config, no log level provided, should be info
func TestOKNoLogLevel(t *testing.T) {
	tmpPath := t.TempDir()
	content := `{
	"server": {
		"mode": "net",
		"host": "127.0.0.1",
		"port": 8888
	}
}`
	confPath := path.Join(tmpPath, "config.json")
	require.Nil(t, os.WriteFile(confPath, []byte(content), 0o644), "Failed to write config")

	expectedConf := AppConfig{
		LogLevel:   logrus.InfoLevel,
		ServerMode: ModeNet,
		Host:       "127.0.0.1",
		Port:       8888,
	}
	conf, err := New(confPath)
	if assert.Nil(t, err, "Unexpected error") {
		assert.Equal(t, expectedConf, *conf, "Unexpected config")
	}
}

// Test giving an invalid server mode
func TestErrMode(t *testing.T) {
	tmpPath := t.TempDir()
	content := `{
	"log": {
		"level": "error"
	},
	"server": {
		"mode": "toto",
		"sock": "/run/toto.sock"
	}
}`
	confPath := path.Join(tmpPath, "config.json")
	require.Nil(t, os.WriteFile(confPath, []byte(content), 0o644), "Failed to write config")

	_, err := New(confPath)
	if assert.Error(t, err, "Unexpected nil error") {
		errMsg := "failed to parse config file: failed to parse server listening mode: invalid listening mode toto"
		assert.Equal(t, errMsg, err.Error(), "Unexpected error message")
	}
}

func TestInvalidJSON(t *testing.T) {
	tmpPath := t.TempDir()
	content := "toto"
	confPath := path.Join(tmpPath, "config.json")
	require.Nil(t, os.WriteFile(confPath, []byte(content), 0o644), "Failed to write config")
	_, err := New(confPath)
	if assert.Error(t, err, "Unexpected nil error") {
		errMsg := "failed to parse config file: invalid character 'o' in literal true (expecting 'r')"
		assert.Equal(t, errMsg, err.Error(), "Unexpected error message")
	}
}