package classify

import "tea.karlcom.de/karl/bucketeer/internal/model"

func azure(service model.Service, resource, region string) model.Match {
	return model.Match{
		Provider:         model.ProviderAzure,
		Service:          service,
		ResourceSpecific: true,
		Region:           region,
		Resource:         resource,
	}
}

// classifyAzureCore handles *.blob|dfs|file|queue|table|web.core.windows.net.
func classifyAzureCore(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 5 || s.label(n-1) != "net" || s.label(n-2) != "windows" || s.label(n-3) != "core" {
		return model.Match{}, false
	}
	svc := s.label(n - 4)
	resource := s.label(0)
	if resource == "" {
		return model.Match{}, false
	}
	switch svc {
	case "blob", "dfs":
		return azure(model.ServiceBlobStorage, resource, ""), true
	case "file":
		return azure(model.ServiceFileStorage, resource, ""), true
	case "queue":
		return azure(model.ServiceQueue, resource, ""), true
	case "table":
		return azure(model.ServiceTableStorage, resource, ""), true
	case "web":
		return azure(model.ServiceWebApp, resource, ""), true
	}
	return model.Match{}, false
}

// classifyAzureDatabase handles <server>.database.windows.net.
func classifyAzureDatabase(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 4 || s.label(n-1) != "net" || s.label(n-2) != "windows" || s.label(n-3) != "database" {
		return model.Match{}, false
	}
	return azure(model.ServiceDatabase, s.label(0), ""), true
}

// classifyAzureFlexibleServer handles <server>.{postgres,mysql}.database.azure.com.
func classifyAzureFlexibleServer(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 5 || s.label(n-1) != "com" || s.label(n-2) != "azure" || s.label(n-3) != "database" {
		return model.Match{}, false
	}
	switch s.label(n - 4) {
	case "postgres":
		return azure(model.ServicePostgres, s.label(0), ""), true
	case "mysql":
		return azure(model.ServiceMySQL, s.label(0), ""), true
	}
	return model.Match{}, false
}

// classifyAzureDocuments handles <account>.documents.azure.com (Cosmos DB).
func classifyAzureDocuments(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 4 || s.label(n-1) != "com" || s.label(n-2) != "azure" || s.label(n-3) != "documents" {
		return model.Match{}, false
	}
	return azure(model.ServiceCosmosDB, s.label(0), ""), true
}

// classifyAzureCosmos handles <account>.{mongo,cassandra,gremlin}.cosmos.azure.com.
func classifyAzureCosmos(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 5 || s.label(n-1) != "com" || s.label(n-2) != "azure" || s.label(n-3) != "cosmos" {
		return model.Match{}, false
	}
	switch s.label(n - 4) {
	case "mongo", "cassandra", "gremlin":
		return azure(model.ServiceCosmosDB, s.label(0), ""), true
	}
	return model.Match{}, false
}

// classifyAzureRedis handles <name>.redis.cache.windows.net.
func classifyAzureRedis(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 5 || s.label(n-1) != "net" || s.label(n-2) != "windows" ||
		s.label(n-3) != "cache" || s.label(n-4) != "redis" {
		return model.Match{}, false
	}
	return azure(model.ServiceRedis, s.label(0), ""), true
}

// classifyAzureManagedRedis handles <name>.redis.azure.net.
func classifyAzureManagedRedis(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 4 || s.label(n-1) != "net" || s.label(n-2) != "azure" || s.label(n-3) != "redis" {
		return model.Match{}, false
	}
	return azure(model.ServiceRedis, s.label(0), ""), true
}

// classifyAzureSearch handles <service>.search.windows.net.
func classifyAzureSearch(s *scanner) (model.Match, bool) {
	n := s.n
	if n < 4 || s.label(n-1) != "net" || s.label(n-2) != "windows" || s.label(n-3) != "search" {
		return model.Match{}, false
	}
	return azure(model.ServiceSearch, s.label(0), ""), true
}