package plugin

import (
	"fmt"
	"sync"

	"go.uber.org/zap"
)

var (
	registry []Plugin
	mu       sync.RWMutex
)

// Register adds a plugin to the global registry.
// Typically called in init() or during application bootstrap.
func Register(p Plugin) {
	mu.Lock()
	defer mu.Unlock()
	registry = append(registry, p)
}

// All returns a copy of all registered plugins.
func All() []Plugin {
	mu.RLock()
	defer mu.RUnlock()
	out := make([]Plugin, len(registry))
	copy(out, registry)
	return out
}

// InitAll initializes all registered plugins in order.
func InitAll(log *zap.Logger) error {
	for _, p := range All() {
		meta := p.Metadata()
		log.Info("initializing plugin",
			zap.String("name", meta.Name),
			zap.String("version", meta.Version),
		)
		if err := p.Init(); err != nil {
			return fmt.Errorf("plugin %s init failed: %w", meta.Name, err)
		}
	}
	return nil
}

// Reset clears the registry. Used in tests only.
func Reset() {
	mu.Lock()
	defer mu.Unlock()
	registry = nil
}