package snapshot

import (
	"git.eeqj.de/sneak/vaultik/internal/config"
	"git.eeqj.de/sneak/vaultik/internal/database"
	"git.eeqj.de/sneak/vaultik/internal/storage"
	"github.com/spf13/afero"
	"go.uber.org/fx"
)

// ScannerParams holds parameters for scanner creation
type ScannerParams struct {
	EnableProgress bool
	Fs             afero.Fs
	Exclude        []string // Exclude patterns (combined global + snapshot-specific)
	SkipErrors     bool     // Skip file read errors (log loudly but continue)
}

// Module exports backup functionality as an fx module.
// It provides a ScannerFactory that can create Scanner instances
// with custom parameters while sharing common dependencies.
var Module = fx.Module("backup",
	fx.Provide(
		provideScannerFactory,
		NewSnapshotManager,
	),
)

// ScannerFactory creates scanners with custom parameters
type ScannerFactory func(params ScannerParams) *Scanner

func provideScannerFactory(cfg *config.Config, repos *database.Repositories, storer storage.Storer) ScannerFactory {
	return func(params ScannerParams) *Scanner {
		// Use provided excludes, or fall back to global config excludes
		excludes := params.Exclude
		if len(excludes) == 0 {
			excludes = cfg.Exclude
		}

		return NewScanner(ScannerConfig{
			FS:               params.Fs,
			ChunkSize:        cfg.ChunkSize.Int64(),
			Repositories:     repos,
			Storage:          storer,
			MaxBlobSize:      cfg.BlobSizeLimit.Int64(),
			CompressionLevel: cfg.CompressionLevel,
			AgeRecipients:    cfg.AgeRecipients,
			EnableProgress:   params.EnableProgress,
			Exclude:          excludes,
			SkipErrors:       params.SkipErrors,
		})
	}
}