package provider

import (
	"fmt"
	"sort"
	"sync"
)

type Factory func(cfg ProviderConfig) (Provider, error)

var (
	registry   = map[string]Factory{}
	registryMu sync.RWMutex
)

func Register(name string, factory Factory) {
	registryMu.Lock()
	defer registryMu.Unlock()
	registry[name] = factory
}

func New(name string, cfg ProviderConfig) (Provider, error) {
	registryMu.RLock()
	factory, ok := registry[name]
	registryMu.RUnlock()
	if !ok {
		return nil, fmt.Errorf("unknown provider: %s (run 'ry provider add %s' first)", name, name)
	}
	return factory(cfg)
}

func List() []string {
	registryMu.RLock()
	defer registryMu.RUnlock()
	names := make([]string, 0, len(registry))
	for name := range registry {
		names = append(names, name)
	}
	sort.Strings(names)
	return names
}