package reputation

import (
	"context"

	"provenance/internal/domain"
	"provenance/internal/trust"
)

// Trust supplies source-relative author scores through the service cache.
type Trust interface {
	Score(context.Context, string) (trust.Result, error)
}

// Algorithm aggregates direct assertions. Results have no trust-score clamp or single path.
// Implementations must support concurrent requests and respect context cancellation and limits.
type Algorithm interface {
	Describe() trust.Descriptor
	Calculate(context.Context, Input) (Result, error)
}

type Input struct {
	Target    string
	Vouches   []domain.Vouch
	Threshold float64
	Trust     Trust
	Limits    trust.Limits
}

// AbsoluteScore is the signed sum, not its mathematical absolute value.
// Score preserves the original sum field for existing clients.
type Result struct {
	Score         float64 `json:"score"`
	AbsoluteScore float64 `json:"absolute_score"`
	MeanScore     float64 `json:"mean_score"`
}