package ingest

import (
	"crypto/sha256"
	"encoding/json"
	"fmt"
)

type IngestResult struct {
	Fingerprint     string
	SourceID        string
	SourcePath      string
	Project         string
	ContentType     string
	Title           string
	Summary         string
	CreatedAt       string
	LineStart       int
	LineEnd         int
	Confidence      float64
	IngesterVersion string
	Provenance      map[string]any
}

type Ingester interface {
	SourceID() string
	Ingest(path string) (*IngestResult, error)
}

func Fingerprint(data []byte) string {
	h := sha256.Sum256(data)
	return fmt.Sprintf("%x", h[:16])
}

func FingerprintWithMeta(data []byte, meta map[string]string) string {
	h := sha256.New()
	h.Write(data)
	enc := json.NewEncoder(h)
	_ = enc.Encode(meta)
	return fmt.Sprintf("%x", h.Sum(nil)[:16])
}

func ProvenanceJSON(m map[string]any) string {
	b, err := json.Marshal(m)
	if err != nil {
		return "{}"
	}
	return string(b)
}

func truncate(s string, n int) string {
	runes := []rune(s)
	if len(runes) <= n {
		return s
	}
	return string(runes[:n]) + "..."
}