package common

import "fmt"

// RepoProvider abstracts the remote git host (Gitea, GitHub, etc.) so the
// client and server packages stay host-agnostic. Provider-specific code lives
// in a single file per host (e.g. provider_gitea.go) that implements this
// interface. Adding a new host is a matter of adding a new file and a case
// in ProviderFor; no caller needs to change.
type RepoProvider interface {
	// CreateRepo creates a new private domain repo on the remote and returns
	// its canonical clone URL.
	CreateRepo(domain string, domainConfig *DomainConfig) (string, error)

	// HeadCommit returns the commit SHA at the tip of branch for the domain's
	// repo. It returns ErrRepoNotFound if either the repo or the branch does
	// not exist, so callers can treat "not created yet" as a non-fatal state.
	HeadCommit(domain, branch string, domainConfig *DomainConfig) (string, error)
}

// ProviderFor returns a RepoProvider matching config.Git.Host.
func ProviderFor(config *AppConfig) (RepoProvider, error) {
	source, err := StrToGitSource(config.Git.Host)
	if err != nil {
		return nil, err
	}
	switch source {
	case Gitea:
		return newGiteaProvider(config)
	default:
		return nil, fmt.Errorf("git source %q is not implemented", config.Git.Host)
	}
}