package commontypes

import "strings"

// CSharpTypeMap maps PostgreSQL types to C# types
var CSharpTypeMap = map[string]string{
	// Integer types
	"integer":     "int",
	"int":         "int",
	"int4":        "int",
	"smallint":    "short",
	"int2":        "short",
	"bigint":      "long",
	"int8":        "long",
	"serial":      "int",
	"bigserial":   "long",
	"smallserial": "short",

	// String types
	"text":      "string",
	"varchar":   "string",
	"char":      "string",
	"character": "string",
	"citext":    "string",
	"bpchar":    "string",
	"uuid":      "Guid",

	// Boolean
	"boolean": "bool",
	"bool":    "bool",

	// Float types
	"real":             "float",
	"float4":           "float",
	"double precision": "double",
	"float8":           "double",
	"numeric":          "decimal",
	"decimal":          "decimal",

	// Date/Time types
	"timestamp":                   "DateTime",
	"timestamp without time zone": "DateTime",
	"timestamp with time zone":    "DateTimeOffset",
	"timestamptz":                 "DateTimeOffset",
	"date":                        "DateTime",
	"time":                        "TimeSpan",
	"time without time zone":      "TimeSpan",
	"time with time zone":         "DateTimeOffset",
	"timetz":                      "DateTimeOffset",

	// Binary
	"bytea": "byte[]",

	// JSON
	"json":  "string",
	"jsonb": "string",
}

// SQLToCSharp converts SQL types to C# types
func SQLToCSharp(sqlType string, nullable bool) string {
	baseType := ExtractBaseType(sqlType)

	csType, ok := CSharpTypeMap[baseType]
	if !ok {
		csType = "object"
	}

	// Handle nullable value types (reference types are already nullable)
	if !nullable && csType != "string" && !strings.HasSuffix(csType, "[]") && csType != "object" {
		return csType + "?"
	}

	return csType
}