package whatsapp

import (
	"context"
	"fmt"
	"sync"

	"git.warky.dev/wdevs/whatshooked/internal/config"
	"git.warky.dev/wdevs/whatshooked/internal/events"
	"git.warky.dev/wdevs/whatshooked/internal/logging"
	"git.warky.dev/wdevs/whatshooked/internal/whatsapp/businessapi"
	"git.warky.dev/wdevs/whatshooked/internal/whatsapp/whatsmeow"

	"go.mau.fi/whatsmeow/types"
)

// Manager manages multiple WhatsApp client connections
type Manager struct {
	clients        map[string]Client
	mu             sync.RWMutex
	eventBus       *events.EventBus
	mediaConfig    config.MediaConfig
	config         *config.Config
	configPath     string
	onConfigUpdate func(*config.Config) error
}

// NewManager creates a new WhatsApp manager
func NewManager(eventBus *events.EventBus, mediaConfig config.MediaConfig, cfg *config.Config, configPath string, onConfigUpdate func(*config.Config) error) *Manager {
	return &Manager{
		clients:        make(map[string]Client),
		eventBus:       eventBus,
		mediaConfig:    mediaConfig,
		config:         cfg,
		configPath:     configPath,
		onConfigUpdate: onConfigUpdate,
	}
}

// Connect establishes a connection to a WhatsApp account using the appropriate client type
func (m *Manager) Connect(ctx context.Context, cfg config.WhatsAppConfig) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	if _, exists := m.clients[cfg.ID]; exists {
		return fmt.Errorf("client %s already connected", cfg.ID)
	}

	var client Client
	var err error

	// Factory pattern based on type
	switch cfg.Type {
	case "business-api":
		client, err = businessapi.NewClient(cfg, m.eventBus, m.mediaConfig)
	case "whatsmeow", "":
		client, err = whatsmeow.NewClient(cfg, m.eventBus, m.mediaConfig)
	default:
		return fmt.Errorf("unknown client type: %s", cfg.Type)
	}

	if err != nil {
		return fmt.Errorf("failed to create client: %w", err)
	}

	if err := client.Connect(ctx); err != nil {
		return fmt.Errorf("failed to connect: %w", err)
	}

	m.clients[cfg.ID] = client
	logging.Info("Client connected", "account_id", cfg.ID, "type", client.GetType())
	return nil
}

// Disconnect disconnects a WhatsApp client
func (m *Manager) Disconnect(id string) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	client, exists := m.clients[id]
	if !exists {
		return fmt.Errorf("client %s not found", id)
	}

	if err := client.Disconnect(); err != nil {
		return fmt.Errorf("failed to disconnect: %w", err)
	}

	delete(m.clients, id)
	logging.Info("Client disconnected", "account_id", id)
	return nil
}

// DisconnectAll disconnects all WhatsApp clients
func (m *Manager) DisconnectAll() {
	m.mu.Lock()
	defer m.mu.Unlock()

	for id, client := range m.clients {
		if err := client.Disconnect(); err != nil {
			logging.Error("Failed to disconnect client", "account_id", id, "error", err)
		} else {
			logging.Info("Client disconnected", "account_id", id)
		}
	}
	m.clients = make(map[string]Client)
}

// SendTextMessage sends a text message from a specific account
func (m *Manager) SendTextMessage(ctx context.Context, accountID string, jid types.JID, text string) error {
	m.mu.RLock()
	client, exists := m.clients[accountID]
	m.mu.RUnlock()

	if !exists {
		return fmt.Errorf("client %s not found", accountID)
	}

	_, err := client.SendTextMessage(ctx, jid, text)
	return err
}

// SendImage sends an image message from a specific account
func (m *Manager) SendImage(ctx context.Context, accountID string, jid types.JID, imageData []byte, mimeType string, caption string) error {
	m.mu.RLock()
	client, exists := m.clients[accountID]
	m.mu.RUnlock()

	if !exists {
		return fmt.Errorf("client %s not found", accountID)
	}

	_, err := client.SendImage(ctx, jid, imageData, mimeType, caption)
	return err
}

// SendVideo sends a video message from a specific account
func (m *Manager) SendVideo(ctx context.Context, accountID string, jid types.JID, videoData []byte, mimeType string, caption string) error {
	m.mu.RLock()
	client, exists := m.clients[accountID]
	m.mu.RUnlock()

	if !exists {
		return fmt.Errorf("client %s not found", accountID)
	}

	_, err := client.SendVideo(ctx, jid, videoData, mimeType, caption)
	return err
}

// SendDocument sends a document message from a specific account
func (m *Manager) SendDocument(ctx context.Context, accountID string, jid types.JID, documentData []byte, mimeType string, filename string, caption string) error {
	m.mu.RLock()
	client, exists := m.clients[accountID]
	m.mu.RUnlock()

	if !exists {
		return fmt.Errorf("client %s not found", accountID)
	}

	_, err := client.SendDocument(ctx, jid, documentData, mimeType, filename, caption)
	return err
}

// GetClient returns a client by ID
func (m *Manager) GetClient(id string) (Client, bool) {
	m.mu.RLock()
	defer m.mu.RUnlock()
	client, exists := m.clients[id]
	return client, exists
}