package eform

// =====================================================
// LOT STRUCTURE
// =====================================================

// Lot represents an individual procurement lot
type Lot struct {
	ID                       string                   `json:"id" xml:"id" validate:"required,lotIDFormat"`
	InternalID               string                   `json:"internal_id,omitempty" xml:"internal_id,omitempty" validate:"max=100"`
	Title                    string                   `json:"title" xml:"title" validate:"required,max=500"`
	Description              string                   `json:"description" xml:"description" validate:"required,max=10000"`
	MainCPVCode              string                   `json:"main_cpv_code" xml:"main_cpv_code" validate:"required,cpvCode"`
	AdditionalCPVCodes       []string                 `json:"additional_cpv_codes,omitempty" xml:"additional_cpv_codes,omitempty" validate:"dive,cpvCode"`
	ContractNature           ContractNature           `json:"contract_nature" xml:"contract_nature" validate:"required"`
	EstimatedValue           *Money                   `json:"estimated_value,omitempty" xml:"estimated_value,omitempty"`
	PlacesOfPerformance      []Place                  `json:"places_of_performance" xml:"places_of_performance" validate:"required,min=1,dive"`
	Duration                 *Duration                `json:"duration,omitempty" xml:"duration,omitempty"`
	Renewable                bool                     `json:"renewable" xml:"renewable"`
	RenewalDescription       string                   `json:"renewal_description,omitempty" xml:"renewal_description,omitempty" validate:"required_if=Renewable true"`
	OptionsDescription       string                   `json:"options_description,omitempty" xml:"options_description,omitempty" validate:"max=10000"`
	VariantsAccepted         bool                     `json:"variants_accepted" xml:"variants_accepted"`
	MaxLotsPerTenderer       *int                     `json:"max_lots_per_tenderer,omitempty" xml:"max_lots_per_tenderer,omitempty" validate:"omitempty,min=1"`
	MaxLotsAwarded           *int                     `json:"max_lots_awarded,omitempty" xml:"max_lots_awarded,omitempty" validate:"omitempty,min=1"`
	LotCombinations          []string                 `json:"lot_combinations,omitempty" xml:"lot_combinations,omitempty"`
	SubcontractingObligation SubcontractingObligation `json:"subcontracting_obligation" xml:"subcontracting_obligation"`
	SubcontractingPercentage *float64                 `json:"subcontracting_percentage,omitempty" xml:"subcontracting_percentage,omitempty" validate:"omitempty,min=0,max=100"`
	TechnicalSpecifications  TechnicalSpecifications  `json:"technical_specifications" xml:"technical_specifications" validate:"required"`
	AwardCriteria            AwardCriteria            `json:"award_criteria" xml:"award_criteria" validate:"required"`
	TenderingTerms           TenderingTerms           `json:"tendering_terms" xml:"tendering_terms" validate:"required"`
	Result                   *LotResult               `json:"result,omitempty" xml:"result,omitempty"`
}

// SubcontractingObligation represents subcontracting requirements
type SubcontractingObligation string

const (
	SubcontractingNone     SubcontractingObligation = "none"
	SubcontractingMinimum  SubcontractingObligation = "minimum"
	SubcontractingRequired SubcontractingObligation = "required"
)

// Place represents a place of performance
type Place struct {
	StreetAddress      string   `json:"street_address,omitempty" xml:"street_address,omitempty" validate:"max=200"`
	Locality           string   `json:"locality,omitempty" xml:"locality,omitempty" validate:"max=100"`
	PostalCode         string   `json:"postal_code,omitempty" xml:"postal_code,omitempty" validate:"max=20"`
	CountrySubdivision string   `json:"country_subdivision,omitempty" xml:"country_subdivision,omitempty" validate:"max=100"`
	CountryCode        string   `json:"country_code" xml:"country_code" validate:"required,iso3166_1_alpha2"`
	NUTSCodes          []string `json:"nuts_codes" xml:"nuts_codes" validate:"required,min=1,dive,nutsCode"`
	Description        string   `json:"description,omitempty" xml:"description,omitempty" validate:"max=1000"`
}

// HasSubcontractingObligation checks if subcontracting is required
func (l *Lot) HasSubcontractingObligation() bool {
	return l.SubcontractingObligation != SubcontractingNone
}

// IsReservedContract checks if lot is reserved for specific participants
func (l *Lot) IsReservedContract() bool {
	return l.TechnicalSpecifications.ReservedExecution != ReservedNone
}