package utils

import (
	"context"

	"github.com/alcionai/clues"
	"github.com/spf13/cobra"

	"github.com/alcionai/corso/src/cli/flags"
	. "github.com/alcionai/corso/src/cli/print"
	"github.com/alcionai/corso/src/internal/common/dttm"
	"github.com/alcionai/corso/src/pkg/control"
)

type RestoreCfgOpts struct {
	Collisions  string
	Destination string
	// DTTMFormat is the timestamp format appended
	// to the default folder name.  Defaults to
	// dttm.HumanReadable.
	DTTMFormat         dttm.TimeFormat
	ProtectedResource  string
	RestorePermissions bool

	Populated flags.PopulatedFlags
}

func makeRestoreCfgOpts(cmd *cobra.Command) RestoreCfgOpts {
	return RestoreCfgOpts{
		Collisions:         flags.CollisionsFV,
		Destination:        flags.DestinationFV,
		DTTMFormat:         dttm.HumanReadable,
		ProtectedResource:  flags.ToResourceFV,
		RestorePermissions: flags.RestorePermissionsFV,

		// populated contains the list of flags that appear in the
		// command, according to pflags.  Use this to differentiate
		// between an "empty" and a "missing" value.
		Populated: flags.GetPopulatedFlags(cmd),
	}
}

// validateRestoreConfigFlags checks common restore flags for
// correctness and interdependencies.
func validateRestoreConfigFlags(fv string, opts RestoreCfgOpts) error {
	_, populated := opts.Populated[flags.CollisionsFN]
	_, foundInValidSet := control.ValidCollisionPolicies()[control.CollisionPolicy(fv)]

	if populated && !foundInValidSet {
		return clues.New("invalid entry for " + flags.CollisionsFN)
	}

	return nil
}

func MakeRestoreConfig(
	ctx context.Context,
	opts RestoreCfgOpts,
) control.RestoreConfig {
	if len(opts.DTTMFormat) == 0 {
		opts.DTTMFormat = dttm.HumanReadable
	}

	restoreCfg := control.DefaultRestoreConfig(opts.DTTMFormat)

	if _, ok := opts.Populated[flags.CollisionsFN]; ok {
		restoreCfg.OnCollision = control.CollisionPolicy(opts.Collisions)
	}

	if _, ok := opts.Populated[flags.DestinationFN]; ok {
		restoreCfg.Location = opts.Destination
	}

	restoreCfg.ProtectedResource = opts.ProtectedResource
	restoreCfg.IncludePermissions = opts.RestorePermissions

	Infof(ctx, "Restoring to folder %s", restoreCfg.Location)

	return restoreCfg
}