package service

import (
	"context"
	"errors"

	"github.com/ocdp/cluster-service/internal/domain/entity"
	"github.com/ocdp/cluster-service/internal/domain/repository"
)

var (
	ErrChartReferenceNotFound = errors.New("chart reference not found")
	ErrChartReferenceExists   = errors.New("chart reference already exists")
)

// ChartReferenceService Chart 引用领域服务
type ChartReferenceService struct {
	chartRefRepo repository.ChartReferenceRepository
	registryRepo repository.RegistryRepository
}

// NewChartReferenceService 创建 Chart 引用服务
func NewChartReferenceService(
	chartRefRepo repository.ChartReferenceRepository,
	registryRepo repository.RegistryRepository,
) *ChartReferenceService {
	return &ChartReferenceService{
		chartRefRepo: chartRefRepo,
		registryRepo: registryRepo,
	}
}

// Create 创建 Chart 引用
func (s *ChartReferenceService) Create(
	ctx context.Context,
	workspaceID, registryID, repository, chartName, description string,
) (*entity.ChartReference, error) {
	// 检查 Registry 是否存在
	registry, err := s.registryRepo.GetByID(ctx, registryID)
	if err != nil {
		return nil, errors.New("registry not found")
	}

	// 检查名称是否已存在
	existing, _ := s.chartRefRepo.GetByName(ctx, workspaceID, chartName)
	if existing != nil {
		return nil, ErrChartReferenceExists
	}

	chartRef := entity.NewChartReference(workspaceID, registry.ID, repository, chartName, description)
	chartRef.Description = description

	if err := s.chartRefRepo.Create(ctx, chartRef); err != nil {
		return nil, err
	}

	return chartRef, nil
}

// GetByID 获取 Chart 引用
func (s *ChartReferenceService) GetByID(ctx context.Context, id string) (*entity.ChartReference, error) {
	chartRef, err := s.chartRefRepo.GetByID(ctx, id)
	if err != nil {
		return nil, ErrChartReferenceNotFound
	}
	return chartRef, nil
}

// GetByWorkspace 获取工作空间的所有 Chart 引用
func (s *ChartReferenceService) GetByWorkspace(ctx context.Context, workspaceID string) ([]*entity.ChartReference, error) {
	return s.chartRefRepo.GetByWorkspace(ctx, workspaceID)
}

// GetByRegistry 获取 Registry 的所有 Chart 引用
func (s *ChartReferenceService) GetByRegistry(ctx context.Context, registryID string) ([]*entity.ChartReference, error) {
	return s.chartRefRepo.GetByRegistry(ctx, registryID)
}

// Update 更新 Chart 引用
func (s *ChartReferenceService) Update(
	ctx context.Context,
	id, registryID, repository, chartName, description string,
	isEnabled bool,
) (*entity.ChartReference, error) {
	chartRef, err := s.chartRefRepo.GetByID(ctx, id)
	if err != nil {
		return nil, ErrChartReferenceNotFound
	}

	if registryID != "" {
		chartRef.RegistryID = registryID
	}
	if repository != "" {
		chartRef.Repository = repository
	}
	if chartName != "" {
		chartRef.ChartName = chartName
	}
	chartRef.Description = description
	chartRef.IsEnabled = isEnabled

	if err := s.chartRefRepo.Update(ctx, chartRef); err != nil {
		return nil, err
	}

	return chartRef, nil
}

// Delete 删除 Chart 引用
func (s *ChartReferenceService) Delete(ctx context.Context, id string) error {
	return s.chartRefRepo.Delete(ctx, id)
}

// List 列出所有 Chart 引用（管理员用）
func (s *ChartReferenceService) List(ctx context.Context) ([]*entity.ChartReference, error) {
	return s.chartRefRepo.List(ctx)
}

// Enable 启用 Chart 引用
func (s *ChartReferenceService) Enable(ctx context.Context, id string) error {
	chartRef, err := s.chartRefRepo.GetByID(ctx, id)
	if err != nil {
		return ErrChartReferenceNotFound
	}
	chartRef.IsEnabled = true
	return s.chartRefRepo.Update(ctx, chartRef)
}

// Disable 禁用 Chart 引用
func (s *ChartReferenceService) Disable(ctx context.Context, id string) error {
	chartRef, err := s.chartRefRepo.GetByID(ctx, id)
	if err != nil {
		return ErrChartReferenceNotFound
	}
	chartRef.IsEnabled = false
	return s.chartRefRepo.Update(ctx, chartRef)
}