package utils

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

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

// TestConvertYAMLToTOMLReadError tests error handling when YAML file can't be read
func TestConvertYAMLToTOMLReadError(t *testing.T) {
	tmpDir, err := os.MkdirTemp("", "convert-read-error-*")
	assert.NoError(t, err)
	defer os.RemoveAll(tmpDir)

	// Create YAML file with no read permissions (on Unix) or delete it after creation
	yamlFile := filepath.Join(tmpDir, "test.yml")
	err = os.WriteFile(yamlFile, []byte("commands:\n  - name: test\n"), 0000)
	assert.NoError(t, err)

	origDir, _ := os.Getwd()
	defer os.Chdir(origDir)
	os.Chdir(tmpDir)

	// This should fail to read but not crash
	err = ConvertYAMLToTOML("test.yml")
	// Function continues on error, doesn't return error
	assert.NoError(t, err)

	// Fix permissions for cleanup
	os.Chmod(yamlFile, 0644)
}

// TestConvertYAMLToTOMLParseError tests error handling when YAML is invalid
func TestConvertYAMLToTOMLParseError(t *testing.T) {
	tmpDir, err := os.MkdirTemp("", "convert-parse-error-*")
	assert.NoError(t, err)
	defer os.RemoveAll(tmpDir)

	// Create invalid YAML
	yamlFile := filepath.Join(tmpDir, "invalid.yml")
	err = os.WriteFile(yamlFile, []byte("commands:\n  - [this is not valid yaml}}"), 0644)
	assert.NoError(t, err)

	origDir, _ := os.Getwd()
	defer os.Chdir(origDir)
	os.Chdir(tmpDir)

	// This should fail to parse but not crash
	err = ConvertYAMLToTOML("invalid.yml")
	assert.NoError(t, err)

	// TOML file should not exist
	_, statErr := os.Stat(filepath.Join(tmpDir, "invalid.toml"))
	assert.True(t, os.IsNotExist(statErr))
}

// TestConvertYAMLToTOMLWriteError tests error handling when TOML file can't be written
func TestConvertYAMLToTOMLWriteError(t *testing.T) {
	if os.Getenv("CI") != "" {
		t.Skip("Skipping write permission test in CI")
	}

	tmpDir, err := os.MkdirTemp("", "convert-write-error-*")
	assert.NoError(t, err)
	defer os.RemoveAll(tmpDir)

	// Create valid YAML
	yamlFile := filepath.Join(tmpDir, "test.yml")
	err = os.WriteFile(yamlFile, []byte("commands:\n  - name: test\n    regex: test\n    lua: v1\n    files: [test.txt]\n"), 0644)
	assert.NoError(t, err)

	// Create output directory with no write permissions
	outputDir := filepath.Join(tmpDir, "readonly")
	err = os.Mkdir(outputDir, 0555)
	assert.NoError(t, err)
	defer os.Chmod(outputDir, 0755) // Fix for cleanup

	origDir, _ := os.Getwd()
	defer os.Chdir(origDir)
	os.Chdir(tmpDir)

	// Move YAML into readonly dir
	newYamlFile := filepath.Join(outputDir, "test.yml")
	os.Rename(yamlFile, newYamlFile)

	os.Chdir(outputDir)

	// This should fail to write but not crash
	err = ConvertYAMLToTOML("test.yml")
	assert.NoError(t, err)
}