package services

import (
	"encoding/json"
	"fmt"
	"log"
	"time"

	"github.com/google/uuid"
	"github.com/ydn/yourdreamnamehere/internal/config"
	"github.com/ydn/yourdreamnamehere/internal/models"
	"gorm.io/gorm"
)

// getEnvOrDefault is defined in cloudron_service.go

type DeploymentService struct {
	db             *gorm.DB
	config         *config.Config
	ovhService     *OVHService
	cloudronService *CloudronService
	stripeService  *StripeService
	dolibarrService *DolibarrService
	emailService   *EmailService
	userService    *UserService
}

func NewDeploymentService(
	db *gorm.DB,
	config *config.Config,
	ovhService *OVHService,
	cloudronService *CloudronService,
	stripeService *StripeService,
	dolibarrService *DolibarrService,
	emailService *EmailService,
	userService *UserService,
) *DeploymentService {
	return &DeploymentService{
		db:               db,
		config:           config,
		ovhService:       ovhService,
		cloudronService:  cloudronService,
		stripeService:    stripeService,
		dolibarrService:  dolibarrService,
		emailService:     emailService,
		userService:      userService,
	}
}

func (s *DeploymentService) ProcessSuccessfulPayment(eventData json.RawMessage) error {
	// Parse the checkout session
	var session struct {
		Customer struct {
			Email string `json:"email"`
			ID    string `json:"id"`
		} `json:"customer"`
		Metadata map[string]string `json:"metadata"`
	}

	if err := json.Unmarshal(eventData, &session); err != nil {
		return fmt.Errorf("failed to parse checkout session: %w", err)
	}

	domainName := session.Metadata["domain_name"]
	customerEmail := session.Metadata["customer_email"]

	if domainName == "" || customerEmail == "" {
		return fmt.Errorf("missing required metadata in checkout session")
	}

	// Start the deployment process
	go s.startDeploymentProcess(session.Customer.ID, domainName, customerEmail)

	return nil
}

func (s *DeploymentService) ProcessFailedPayment(eventData json.RawMessage) error {
	// Handle failed payment - update customer status, send notifications, etc.
	log.Printf("Processing failed payment: %s", string(eventData))
	
	// Implementation would depend on specific requirements
	// For now, we'll just log it
	return nil
}

func (s *DeploymentService) startDeploymentProcess(stripeCustomerID, domainName, customerEmail string) {
	log.Printf("Starting deployment process for domain: %s, customer: %s", domainName, customerEmail)

	// Get customer from database
	var customer models.Customer
	if err := s.db.Where("stripe_id = ?", stripeCustomerID).First(&customer).Error; err != nil {
		log.Printf("Failed to find customer: %v", err)
		return
	}

	// Create deployment record
	deploymentLog := &models.DeploymentLog{
		VPSID:      uuid.New(), // Will be updated after VPS creation
		Step:       "deployment_start",
		Status:     "started",
		Message:    "Starting full deployment process",
		CreatedAt:  time.Now(),
	}
	s.db.Create(deploymentLog)

	// Step 1: Check domain availability
	if err := s.registerDomain(customer.ID, domainName, customerEmail); err != nil {
		log.Printf("Domain registration failed: %v", err)
		return
	}

	// Step 2: Provision VPS
	vps, err := s.provisionVPS(customer.ID, domainName)
	if err != nil {
		log.Printf("VPS provisioning failed: %v", err)
		return
	}

	// Step 3: Install Cloudron
	if err := s.installCloudron(vps.ID, domainName, customerEmail); err != nil {
		log.Printf("Cloudron installation failed: %v", err)
		return
	}

	// Step 4: Create Dolibarr records
	if err := s.createBackOfficeRecords(customer.ID, domainName); err != nil {
		log.Printf("Dolibarr record creation failed: %v", err)
		return
	}

	// Step 5: Send admin invitation
	if err := s.sendAdminInvitation(vps.ID, customerEmail, domainName); err != nil {
		log.Printf("Failed to send admin invitation: %v", err)
		return
	}

	// Mark deployment as completed
	s.logDeploymentStep(customer.ID, "deployment_complete", "completed", 
		"Full deployment completed successfully", "")
}

func (s *DeploymentService) registerDomain(customerID uuid.UUID, domainName, customerEmail string) error {
	s.logDeploymentStep(customerID, "domain_registration", "started", 
		"Checking domain availability", "")

	// Check if domain is available
	available, err := s.ovhService.CheckDomainAvailability(domainName)
	if err != nil {
		s.logDeploymentStep(customerID, "domain_registration", "failed", 
			"Failed to check domain availability", err.Error())
		return err
	}

	if !available {
		s.logDeploymentStep(customerID, "domain_registration", "failed", 
			"Domain is not available", "")
		return fmt.Errorf("domain %s is not available", domainName)
	}

	// Create domain order with configurable contact information
	order := OVHDomainOrder{
		Domain: domainName,
		Owner: struct {
			FirstName string `json:"firstName"`
			LastName  string `json:"lastName"`
			Email     string `json:"email"`
			Phone     string `json:"phone"`
			Country   string `json:"country"`
		}{
			FirstName: getEnvOrDefault("YDN_CONTACT_FIRSTNAME", "YourDreamNameHere"),
			LastName:  getEnvOrDefault("YDN_CONTACT_LASTNAME", "Customer"),
			Email:     customerEmail,
			Phone:     getEnvOrDefault("YDN_CONTACT_PHONE", "+1234567890"),
			Country:   getEnvOrDefault("YDN_CONTACT_COUNTRY", "US"),
		},
		// Set owner, admin, and tech contacts the same for simplicity
		Admin: struct {
			FirstName string `json:"firstName"`
			LastName  string `json:"lastName"`
			Email     string `json:"email"`
			Phone     string `json:"phone"`
			Country   string `json:"country"`
		}{
			FirstName: getEnvOrDefault("YDN_CONTACT_FIRSTNAME", "YourDreamNameHere"),
			LastName:  getEnvOrDefault("YDN_CONTACT_LASTNAME", "Customer"),
			Email:     customerEmail,
			Phone:     getEnvOrDefault("YDN_CONTACT_PHONE", "+1234567890"),
			Country:   getEnvOrDefault("YDN_CONTACT_COUNTRY", "US"),
		},
		Tech: struct {
			FirstName string `json:"firstName"`
			LastName  string `json:"lastName"`
			Email     string `json:"email"`
			Phone     string `json:"phone"`
			Country   string `json:"country"`
		}{
			FirstName: getEnvOrDefault("YDN_TECH_CONTACT_FIRSTNAME", "Technical"),
			LastName:  getEnvOrDefault("YDN_TECH_CONTACT_LASTNAME", "Support"),
			Email:     getEnvOrDefault("YDN_TECH_CONTACT_EMAIL", "tech@yourdreamnamehere.com"),
			Phone:     getEnvOrDefault("YDN_TECH_CONTACT_PHONE", "+1234567890"),
			Country:   getEnvOrDefault("YDN_CONTACT_COUNTRY", "US"),
		},
	}

	if err := s.ovhService.RegisterDomain(order); err != nil {
		s.logDeploymentStep(customerID, "domain_registration", "failed", 
			"Failed to register domain", err.Error())
		return err
	}

	// Update domain record in database
	if err := s.db.Model(&models.Domain{}).
		Where("customer_id = ? AND name = ?", customerID, domainName).
		Updates(map[string]interface{}{
			"status": "registered",
			"registered_at": time.Now(),
		}).Error; err != nil {
		return fmt.Errorf("failed to update domain status: %w", err)
	}

	s.logDeploymentStep(customerID, "domain_registration", "completed", 
		"Domain registration completed successfully", "")

	return nil
}

func (s *DeploymentService) provisionVPS(customerID uuid.UUID, domainName string) (*models.VPS, error) {
	s.logDeploymentStep(customerID, "vps_provisioning", "started", 
		"Starting VPS provisioning", "")

	// Get domain record
	var domain models.Domain
	if err := s.db.Where("customer_id = ? AND name = ?", customerID, domainName).First(&domain).Error; err != nil {
		return nil, fmt.Errorf("failed to find domain: %w", err)
	}

	// Create VPS order
	order := OVHVPSOrder{
		Name:           fmt.Sprintf("%s-vps", domainName),
		Region:         "GRA", // Gravelines, France
		Flavor:         "vps-ssd-1", // Basic VPS
		Image:          "ubuntu_22_04",
		MonthlyBilling: true,
	}

	vps, err := s.ovhService.ProvisionVPS(order)
	if err != nil {
		s.logDeploymentStep(customerID, "vps_provisioning", "failed", 
			"Failed to provision VPS", err.Error())
		return nil, err
	}

	// Update VPS with domain association
	vps.DomainID = domain.ID
	if err := s.db.Save(vps).Error; err != nil {
		return nil, fmt.Errorf("failed to save VPS: %w", err)
	}

	s.logDeploymentStep(customerID, "vps_provisioning", "completed", 
		"VPS provisioning completed successfully", 
		fmt.Sprintf("VPS ID: %s, IP: %s", vps.OVHInstanceID, vps.IPAddress))

	return vps, nil
}

func (s *DeploymentService) installCloudron(vpsID uuid.UUID, domainName, customerEmail string) error {
	return s.cloudronService.InstallCloudron(vpsID, domainName)
}

func (s *DeploymentService) createBackOfficeRecords(customerID uuid.UUID, domainName string) error {
	s.logDeploymentStep(customerID, "dolibarr_setup", "started", 
		"Creating back-office records", "")

	// Get customer
	var customer models.Customer
	if err := s.db.Where("id = ?", customerID).First(&customer).Error; err != nil {
		return fmt.Errorf("failed to find customer: %w", err)
	}

	// Create customer in Dolibarr
	dolibarrCustomer, err := s.dolibarrService.CreateCustomer(&customer)
	if err != nil {
		s.logDeploymentStep(customerID, "dolibarr_setup", "failed", 
			"Failed to create customer in Dolibarr", err.Error())
		return err
	}

	// Create product if it doesn't exist
	if err := s.dolibarrService.CreateOrUpdateProduct(
		"SOVEREIGN_HOSTING",
		"Sovereign Data Hosting",
		"Complete sovereign data hosting package with domain, VPS, and Cloudron",
		250.00,
	); err != nil {
		log.Printf("Warning: failed to create product in Dolibarr: %v", err)
	}

	// Create monthly invoice
	if _, err := s.dolibarrService.CreateInvoice(
		dolibarrCustomer.ID,
		250.00,
		fmt.Sprintf("Monthly subscription for %s", domainName),
	); err != nil {
		s.logDeploymentStep(customerID, "dolibarr_setup", "failed", 
			"Failed to create invoice in Dolibarr", err.Error())
		return err
	}

	s.logDeploymentStep(customerID, "dolibarr_setup", "completed", 
		"Back-office records created successfully", "")

	return nil
}

func (s *DeploymentService) sendAdminInvitation(vpsID uuid.UUID, customerEmail, domainName string) error {
	s.logDeploymentStepByVPS(vpsID, "admin_invitation", "started", 
		"Sending administrator invitation", "")

	// Get VPS details
	var vps models.VPS
	if err := s.db.Where("id = ?", vpsID).First(&vps).Error; err != nil {
		return fmt.Errorf("failed to find VPS: %w", err)
	}

	if err := s.cloudronService.SendAdministratorInvite(vps.CloudronURL, customerEmail); err != nil {
		s.logDeploymentStepByVPS(vpsID, "admin_invitation", "failed", 
			"Failed to send administrator invitation", err.Error())
		return err
	}

	s.logDeploymentStepByVPS(vpsID, "admin_invitation", "completed", 
		"Administrator invitation sent successfully", "")

	return nil
}

func (s *DeploymentService) CreateDomain(userID, domainName string) (*models.Domain, error) {
	// Get user
	user, err := s.userService.GetUserByID(userID)
	if err != nil {
		return nil, fmt.Errorf("failed to get user: %w", err)
	}

	// Get customer for user
	var customer models.Customer
	if err := s.db.Where("user_id = ?", user.ID).First(&customer).Error; err != nil {
		return nil, fmt.Errorf("failed to find customer for user: %w", err)
	}

	// Create domain record
	domain := &models.Domain{
		CustomerID: customer.ID,
		Name:       domainName,
		Status:     "pending",
		CreatedAt:  time.Now(),
		UpdatedAt:  time.Now(),
	}

	if err := s.db.Create(domain).Error; err != nil {
		return nil, fmt.Errorf("failed to create domain: %w", err)
	}

	return domain, nil
}

func (s *DeploymentService) logDeploymentStep(customerID uuid.UUID, step, status, message, details string) {
	log := &models.DeploymentLog{
		VPSID:      uuid.New(), // Temporary VPS ID, should be updated when VPS is created
		Step:       step,
		Status:     status,
		Message:    message,
		Details:    details,
		CreatedAt:  time.Now(),
	}
	s.db.Create(log)
}

func (s *DeploymentService) logDeploymentStepByVPS(vpsID uuid.UUID, step, status, message, details string) {
	log := &models.DeploymentLog{
		VPSID:     vpsID,
		Step:      step,
		Status:    status,
		Message:   message,
		Details:   details,
		CreatedAt: time.Now(),
	}
	s.db.Create(log)
}