package app

import (
	"fmt"
	"log/slog"
)

// RequireOpts configures [Lifecycle.RequireWithOpts] behavior.
type RequireOpts struct {
	// Logger overrides the lifecycle logger for the required modules. If nil,
	// the lifecycle logger is used.
	Logger *slog.Logger

	// Unique, when true, returns an error if any requested module name is
	// already set up instead of ignoring duplicate instances.
	Unique bool
}

// Require adds module(s) to the lifecycle and immediately runs setup.
// Modules that are already set up (by name) are ignored.
func (app *Lifecycle) Require(modules ...*Module) error {
	return app.require(RequireOpts{}, modules...)
}

// RequireWithOpts is like [Lifecycle.Require] with additional options.
func (app *Lifecycle) RequireWithOpts(opts RequireOpts, modules ...*Module) error {
	return app.require(opts, modules...)
}

// GetModule returns a registered module by name.
func (app *Lifecycle) GetModule(name string) (*Module, error) {
	mod, err := app.getModuleByName(name)
	if err != nil {
		return nil, fmt.Errorf("get module %q: %w", name, err)
	}
	return mod, nil
}

// RequireL loads modules using a specific logger. Deprecated: use
// RequireWithOpts(RequireOpts{Logger: logger}, modules...).
func (app *Lifecycle) RequireL(logger *slog.Logger, modules ...*Module) error {
	if logger == nil {
		return fmt.Errorf("logger cannot be nil")
	}
	return app.require(RequireOpts{Logger: logger}, modules...)
}

// RequireUnique loads modules and errors if any name is already set up.
// Deprecated: use RequireWithOpts(RequireOpts{Unique: true}, modules...).
func (app *Lifecycle) RequireUnique(modules ...*Module) error {
	return app.require(RequireOpts{Unique: true}, modules...)
}

// RequireUniqueL combines RequireL and RequireUnique.
// Deprecated: use RequireWithOpts(RequireOpts{Logger: logger, Unique: true}, modules...).
func (app *Lifecycle) RequireUniqueL(logger *slog.Logger, modules ...*Module) error {
	if logger == nil {
		return fmt.Errorf("logger cannot be nil")
	}
	return app.require(RequireOpts{Logger: logger, Unique: true}, modules...)
}