package repo

import (
	"fmt"
	"os"
	"path/filepath"
)

// hookNames are the git server-side hooks nugitea installs a delegator for.
// Each delegator just execs `nugitea hook <name>` and passes stdin through,
// mirroring Gitea's hooks/<name> -> hooks/<name>.d/gitea delegation (see
// modules/gitrepo/hooks.go) but flattened to a single script since nugitea
// has no per-hook custom-script fan-out to support.
var hookNames = []string{"pre-receive", "update", "post-receive"}

const hookTemplate = `#!/bin/sh
# AUTO GENERATED BY NUGITEA, DO NOT MODIFY
exec %q hook %s "$@"
`

// installHooks writes the hook delegator scripts into repoPath/hooks.
// nugiteaBin is the absolute path to the running nugitea binary, so the
// hook can call back into it regardless of $PATH.
func installHooks(repoPath, nugiteaBin string) error {
	hookDir := filepath.Join(repoPath, "hooks")
	if err := os.MkdirAll(hookDir, 0o755); err != nil {
		return err
	}
	for _, name := range hookNames {
		script := fmt.Sprintf(hookTemplate, nugiteaBin, name)
		path := filepath.Join(hookDir, name)
		if err := os.WriteFile(path, []byte(script), 0o755); err != nil {
			return fmt.Errorf("write hook %s: %w", name, err)
		}
	}
	return nil
}