//go:build aws

package main

import (
	"os"
	"strings"
	"testing"
)

const nameValidationTestCSVPath = "./temp-name-validation.csv"

func TestNameValidationForCreateMode(t *testing.T) {
	t.Run("CreateMode_MissingFirstName", func(t *testing.T) {
		// CSV with missing first name
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,,Smith\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  false,
		}

		_, err = readCSV(nameValidationTestCSVPath, config)
		if err == nil {
			t.Fatal("Expected error for missing first_name in create mode, but got none")
		}

		if !strings.Contains(err.Error(), "first_name cannot be empty for user creation") {
			t.Fatalf("Expected error about missing first_name, got: %v", err)
		}

		t.Logf("Correctly detected missing first_name: %v", err)
	})

	t.Run("CreateMode_MissingLastName", func(t *testing.T) {
		// CSV with missing last name
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,John,\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  false,
		}

		_, err = readCSV(nameValidationTestCSVPath, config)
		if err == nil {
			t.Fatal("Expected error for missing last_name in create mode, but got none")
		}

		if !strings.Contains(err.Error(), "last_name cannot be empty for user creation") {
			t.Fatalf("Expected error about missing last_name, got: %v", err)
		}

		t.Logf("Correctly detected missing last_name: %v", err)
	})

	t.Run("CreateMode_MissingBothNames", func(t *testing.T) {
		// CSV with missing both names
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,,\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  false,
		}

		_, err = readCSV(nameValidationTestCSVPath, config)
		if err == nil {
			t.Fatal("Expected error for missing names in create mode, but got none")
		}

		if !strings.Contains(err.Error(), "first_name cannot be empty for user creation") {
			t.Fatalf("Expected error about missing first_name, got: %v", err)
		}

		t.Logf("Correctly detected missing first_name: %v", err)
	})

	t.Run("CreateMode_ValidNames", func(t *testing.T) {
		// CSV with valid names
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,John,Smith\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  false,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for valid names in create mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		user := users[0]
		if user["email"] != "test@example.com" {
			t.Fatalf("Expected email 'test@example.com', got '%s'", user["email"])
		}
		if user["first_name"] != "John" {
			t.Fatalf("Expected first_name 'John', got '%s'", user["first_name"])
		}
		if user["last_name"] != "Smith" {
			t.Fatalf("Expected last_name 'Smith', got '%s'", user["last_name"])
		}

		t.Logf("Valid names accepted correctly for create mode")
	})
}

func TestNameValidationForDeleteMode(t *testing.T) {
	t.Run("DeleteMode_OnlyEmail", func(t *testing.T) {
		// CSV with only email (minimal CSV for delete)
		csvContent := "email\n"
		csvContent += "test@example.com\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  true,
			DisableUsers: false,
			EnableUsers:  false,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for email-only CSV in delete mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		user := users[0]
		if user["email"] != "test@example.com" {
			t.Fatalf("Expected email 'test@example.com', got '%s'", user["email"])
		}
		if user["first_name"] != "" {
			t.Fatalf("Expected empty first_name, got '%s'", user["first_name"])
		}
		if user["last_name"] != "" {
			t.Fatalf("Expected empty last_name, got '%s'", user["last_name"])
		}

		t.Logf("Email-only CSV accepted correctly for delete mode")
	})

	t.Run("DeleteMode_EmptyNames", func(t *testing.T) {
		// CSV with empty names (should be allowed for delete)
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,,\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  true,
			DisableUsers: false,
			EnableUsers:  false,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for empty names in delete mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		user := users[0]
		if user["email"] != "test@example.com" {
			t.Fatalf("Expected email 'test@example.com', got '%s'", user["email"])
		}

		t.Logf("Empty names accepted correctly for delete mode")
	})
}

func TestNameValidationForDisableMode(t *testing.T) {
	t.Run("DisableMode_OnlyEmail", func(t *testing.T) {
		// CSV with only email
		csvContent := "email\n"
		csvContent += "test@example.com\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: true,
			EnableUsers:  false,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for email-only CSV in disable mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		user := users[0]
		if user["email"] != "test@example.com" {
			t.Fatalf("Expected email 'test@example.com', got '%s'", user["email"])
		}

		t.Logf("Email-only CSV accepted correctly for disable mode")
	})

	t.Run("DisableMode_EmptyNames", func(t *testing.T) {
		// CSV with empty names
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,,\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: true,
			EnableUsers:  false,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for empty names in disable mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		t.Logf("Empty names accepted correctly for disable mode")
	})
}

func TestNameValidationForEnableMode(t *testing.T) {
	t.Run("EnableMode_OnlyEmail", func(t *testing.T) {
		// CSV with only email
		csvContent := "email\n"
		csvContent += "test@example.com\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  true,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for email-only CSV in enable mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		user := users[0]
		if user["email"] != "test@example.com" {
			t.Fatalf("Expected email 'test@example.com', got '%s'", user["email"])
		}

		t.Logf("Email-only CSV accepted correctly for enable mode")
	})

	t.Run("EnableMode_EmptyNames", func(t *testing.T) {
		// CSV with empty names
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,,\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  true,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for empty names in enable mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		t.Logf("Empty names accepted correctly for enable mode")
	})
}

// Test edge case where CSV has inconsistent field counts
func TestNameValidationEdgeCases(t *testing.T) {
	t.Run("CreateMode_InsufficientFields", func(t *testing.T) {
		// CSV with insufficient fields for create mode
		csvContent := "email,first_name,last_name\n"
		csvContent += "test@example.com,John\n" // Missing last_name field

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  false,
			DisableUsers: false,
			EnableUsers:  false,
		}

		_, err = readCSV(nameValidationTestCSVPath, config)
		if err == nil {
			t.Fatal("Expected error for insufficient fields in create mode, but got none")
		}

		if !strings.Contains(err.Error(), "must have at least 3 fields") {
			t.Fatalf("Expected error about insufficient fields, got: %v", err)
		}

		t.Logf("Correctly detected insufficient fields: %v", err)
	})

	t.Run("DeleteMode_OnlyEmailField", func(t *testing.T) {
		// CSV with just email field for delete mode
		csvContent := "email\n"
		csvContent += "test@example.com\n"

		err := os.WriteFile(nameValidationTestCSVPath, []byte(csvContent), 0600)
		if err != nil {
			t.Fatalf("Failed to create test CSV: %v", err)
		}
		defer os.Remove(nameValidationTestCSVPath)

		config := AppConfig{
			CSVPath:      nameValidationTestCSVPath,
			DeleteUsers:  true,
			DisableUsers: false,
			EnableUsers:  false,
		}

		users, err := readCSV(nameValidationTestCSVPath, config)
		if err != nil {
			t.Fatalf("Expected no error for email-only CSV in delete mode, got: %v", err)
		}

		if len(users) != 1 {
			t.Fatalf("Expected 1 user, got %d", len(users))
		}

		t.Logf("Single email field correctly handled for delete mode")
	})
}