package imports

import "fncConvertGui/internal/models"

type CSVtoTransactionsFunc func(data string) ([]models.Transaction, error)

type MappingVersion struct {
	Name             string                `json:"name"`
	CsvToTransaction CSVtoTransactionsFunc `json:"-"`
}

type Importer struct {
	Name     string           `json:"name"`
	Versions []MappingVersion `json:"versions"`
}

// ImporterInfo is the JSON-safe subset sent to the frontend.
type ImporterInfo struct {
	Name     string   `json:"name"`
	Versions []string `json:"versions"`
}

var DefaultImporters = []Importer{
	{
		Name: "LZO",
		Versions: []MappingVersion{
			{Name: "1.0.0", CsvToTransaction: nil},
		},
	},
}

// ListImporters returns a frontend-friendly summary of all registered importers.
func ListImporters() []ImporterInfo {
	out := make([]ImporterInfo, len(DefaultImporters))
	for i, imp := range DefaultImporters {
		versions := make([]string, len(imp.Versions))
		for j, v := range imp.Versions {
			versions[j] = v.Name
		}
		out[i] = ImporterInfo{Name: imp.Name, Versions: versions}
	}
	return out
}