package verify

import (
	"fmt"
	"path/filepath"
	"strings"

	"github.com/cli/cli/v2/pkg/cmd/attestation/api"
	"github.com/cli/cli/v2/pkg/cmd/attestation/artifact/oci"
	"github.com/cli/cli/v2/pkg/cmd/attestation/io"
	"github.com/cli/cli/v2/pkg/cmdutil"
)

// Options captures the options for the verify command
type Options struct {
	ArtifactPath         string
	BundlePath           string
	CustomTrustedRoot    string
	DenySelfHostedRunner bool
	DigestAlgorithm      string
	NoPublicGood         bool
	OIDCIssuer           string
	Owner                string
	Repo                 string
	SAN                  string
	SANRegex             string
	APIClient            api.Client
	Logger               *io.Handler
	Limit                int
	OCIClient            oci.Client
	exporter             cmdutil.Exporter
}

// Clean cleans the file path option values
func (opts *Options) Clean() {
	if opts.BundlePath != "" {
		opts.BundlePath = filepath.Clean(opts.BundlePath)
	}
}

func (opts *Options) SetPolicyFlags() {
	// check that Repo is in the expected format if provided
	if opts.Repo != "" {
		// we expect the repo argument to be in the format <OWNER>/<REPO>
		splitRepo := strings.Split(opts.Repo, "/")

		// if Repo is provided but owner is not, set the OWNER portion of the Repo value
		// to Owner
		opts.Owner = splitRepo[0]

		if opts.SAN == "" && opts.SANRegex == "" {
			opts.SANRegex = expandToGitHubURL(opts.Repo)
		}
		return
	}
	if opts.SAN == "" && opts.SANRegex == "" {
		opts.SANRegex = expandToGitHubURL(opts.Owner)
	}
}

// AreFlagsValid checks that the provided flag combination is valid
// and returns an error otherwise
func (opts *Options) AreFlagsValid() error {
	// check that Repo is in the expected format if provided
	if opts.Repo != "" {
		// we expect the repo argument to be in the format <OWNER>/<REPO>
		splitRepo := strings.Split(opts.Repo, "/")
		if len(splitRepo) != 2 {
			return fmt.Errorf("invalid value provided for repo: %s", opts.Repo)
		}
	}

	// Check that limit is between 1 and 1000
	if opts.Limit < 1 || opts.Limit > 1000 {
		return fmt.Errorf("limit %d not allowed, must be between 1 and 1000", opts.Limit)
	}

	return nil
}

func expandToGitHubURL(ownerOrRepo string) string {
	return fmt.Sprintf("^https://github.com/%s/", ownerOrRepo)
}