package appcli

import (
	"context"
	"errors"

	"gitea.auvem.com/go-toolkit/app"
	"github.com/urfave/cli/v3"
)

var (
	// ErrLifecycleNotInContext is returned when a command with dependencies runs
	// without a lifecycle in context.
	ErrLifecycleNotInContext = errors.New("lifecycle not found in context, cannot run command with dependencies")

	// ErrNoDependencies is returned when DepList is called with zero modules.
	ErrNoDependencies = errors.New("no dependencies provided")
)

// DepFn returns modules to load before a command runs. The *cli.Command is the
// command whose Before hook is executing (may be a parent in nested command trees).
type DepFn func(*app.Lifecycle, *cli.Command) ([]*app.Module, error)

// DepList returns a DepFn that always supplies the given modules.
func DepList(deps ...*app.Module) DepFn {
	return func(_ *app.Lifecycle, _ *cli.Command) ([]*app.Module, error) {
		if len(deps) == 0 {
			return nil, ErrNoDependencies
		}
		return deps, nil
	}
}

// Run injects lifecycle into ctx and executes cmd with args.
func Run(ctx context.Context, lc *app.Lifecycle, cmd *cli.Command, args []string) error {
	return cmd.Run(lc.Context(ctx), args)
}