package world

import (
	"eq2emu/internal/packets"
	"fmt"
)

// RegisterPacketHandlers registers all world server packet handlers
func (w *World) RegisterPacketHandlers() {
	fmt.Println("Registering world server packet handlers...")
	
	// Basic connection and loading handlers
	packets.RegisterGlobalHandler(packets.OP_DoneLoadingZoneResourcesMsg, w.HandleDoneLoadingZoneResources)
	packets.RegisterGlobalHandler(packets.OP_DoneSendingInitialEntitiesMsg, w.HandleDoneSendingInitialEntities)
	packets.RegisterGlobalHandler(packets.OP_DoneLoadingEntityResourcesMsg, w.HandleDoneLoadingEntityResources)
	packets.RegisterGlobalHandler(packets.OP_DoneLoadingUIResourcesMsg, w.HandleDoneLoadingUIResources)
	
	// Zone readiness
	packets.RegisterGlobalHandler(packets.OP_ReadyToZoneMsg, w.HandleReadyToZone)
	
	// Command handling
	packets.RegisterGlobalHandler(packets.OP_ClientCmdMsg, w.HandleClientCommand)
	packets.RegisterGlobalHandler(packets.OP_DispatchClientCmdMsg, w.HandleDispatchClientCommand)
	
	// Position updates
	packets.RegisterGlobalHandler(packets.OP_UpdatePositionMsg, w.HandlePositionUpdate)
	
	// Chat system
	packets.RegisterGlobalHandler(packets.OP_ChatTellChannelMsg, w.HandleChatTellChannel)
	packets.RegisterGlobalHandler(packets.OP_ChatTellUserMsg, w.HandleChatTellUser)
	
	// Zone transitions
	packets.RegisterGlobalHandler(packets.OP_ChangeZoneMsg, w.HandleChangeZone)
	packets.RegisterGlobalHandler(packets.OP_ClientTeleportRequestMsg, w.HandleClientTeleportRequest)
	
	// Achievement system
	packets.RegisterGlobalHandler(packets.OP_AchievementUpdateMsg, w.HandleAchievementUpdate)
	packets.RegisterGlobalHandler(packets.OP_CharacterAchievements, w.HandleCharacterAchievements)
	
	// Title system
	packets.RegisterGlobalHandler(packets.OP_TitleUpdateMsg, w.HandleTitleUpdate)
	packets.RegisterGlobalHandler(packets.OP_CharacterTitles, w.HandleCharacterTitles)
	packets.RegisterGlobalHandler(packets.OP_SetActiveTitleMsg, w.HandleSetActiveTitle)
	
	fmt.Printf("Registered %d packet handlers\n", 16)
}

// HandleDoneLoadingZoneResources handles when client finishes loading zone resources
func (w *World) HandleDoneLoadingZoneResources(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s finished loading zone resources\n", ctx.Client.GetCharacterName())
	
	// Update client state
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		// TODO: Send initial zone data, spawns, etc.
	}
	
	return nil
}

// HandleDoneSendingInitialEntities handles when client finishes receiving initial entities
func (w *World) HandleDoneSendingInitialEntities(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s finished receiving initial entities\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		// TODO: Mark client as fully loaded
	}
	
	return nil
}

// HandleDoneLoadingEntityResources handles when client finishes loading entity resources
func (w *World) HandleDoneLoadingEntityResources(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s finished loading entity resources\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
	}
	
	return nil
}

// HandleDoneLoadingUIResources handles when client finishes loading UI resources
func (w *World) HandleDoneLoadingUIResources(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s finished loading UI resources\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		// TODO: Send initial UI packets (character sheet, spellbook, etc.)
	}
	
	return nil
}

// HandleReadyToZone handles when client is ready to enter the zone
func (w *World) HandleReadyToZone(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s is ready to enter zone\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Complete zone entry process
		// - Send world time
		// - Send MOTD
		// - Send initial game state
		// - Add player to zone
	}
	
	return nil
}

// HandleClientCommand handles client command messages
func (w *World) HandleClientCommand(ctx *packets.PacketContext, packet *packets.PacketData) error {
	// TODO: Parse command from packet data
	// For now, just log the attempt
	fmt.Printf("Client %s sent command (raw packet)\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Extract command text and dispatch to command manager
		// This will require parsing the packet structure
	}
	
	return nil
}

// HandleDispatchClientCommand handles dispatched client commands
func (w *World) HandleDispatchClientCommand(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s sent dispatched command\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		// TODO: Handle dispatched commands
	}
	
	return nil
}

// HandlePositionUpdate handles player position updates
func (w *World) HandlePositionUpdate(ctx *packets.PacketContext, packet *packets.PacketData) error {
	// Position updates are frequent, so only log occasionally
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Parse position data from packet
		// TODO: Update player position in zone
		// TODO: Send position update to other players in range
	}
	
	return nil
}

// HandleChatTellChannel handles channel chat messages
func (w *World) HandleChatTellChannel(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s sent channel chat message\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Parse chat message from packet
		// TODO: Validate channel permissions
		// TODO: Broadcast message to appropriate recipients
	}
	
	return nil
}

// HandleChatTellUser handles direct tell messages
func (w *World) HandleChatTellUser(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s sent tell message\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Parse tell message and target from packet
		// TODO: Find target player
		// TODO: Send message to target
	}
	
	return nil
}

// HandleChangeZone handles zone change requests
func (w *World) HandleChangeZone(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested zone change\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Parse zone change request from packet
		// TODO: Validate zone change is allowed
		// TODO: Begin zone transfer process
	}
	
	return nil
}

// HandleClientTeleportRequest handles client teleport requests
func (w *World) HandleClientTeleportRequest(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested teleport\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Parse teleport request from packet
		// TODO: Validate teleport permissions
		// TODO: Execute teleport
	}
	
	return nil
}

// HandleAchievementUpdate handles achievement update requests from client
func (w *World) HandleAchievementUpdate(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested achievement update\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// Send current achievement data to client
		w.SendAchievementData(client)
	}
	
	return nil
}

// HandleCharacterAchievements handles character achievements request from client  
func (w *World) HandleCharacterAchievements(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested character achievements\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// Send complete achievement list to client
		w.SendCharacterAchievements(client)
	}
	
	return nil
}

// SendAchievementData sends achievement data to a client
func (w *World) SendAchievementData(client *Client) {
	if w.achievementMgr == nil {
		return
	}
	
	characterID := client.CharacterID
	
	// Get player's completed achievements
	completedAchievements := w.achievementMgr.GetPlayerCompletedAchievements(characterID)
	inProgressAchievements := w.achievementMgr.GetPlayerInProgressAchievements(characterID)
	
	fmt.Printf("Sending achievement data to %s: %d completed, %d in progress\n", 
		client.CharacterName, len(completedAchievements), len(inProgressAchievements))
	
	// Create achievement update packet
	// This would normally build a proper packet structure
	totalPoints := w.calculateAchievementPoints(characterID)
	
	// Send packet to client (placeholder - would use actual packet building)
	client.SendSimpleMessage(fmt.Sprintf("Achievement Update: %d completed, %d in progress, %d points", 
		len(completedAchievements), len(inProgressAchievements), totalPoints))
}

// SendCharacterAchievements sends complete character achievements to client
func (w *World) SendCharacterAchievements(client *Client) {
	if w.achievementMgr == nil {
		return
	}
	
	characterID := client.CharacterID
	
	// Get all achievements with player progress
	allAchievements := w.achievementMgr.masterList.GetAllAchievements()
	characterData := make(map[string]interface{})
	
	for achievementID, achievement := range allAchievements {
		progress := w.achievementMgr.GetPlayerProgress(characterID, achievementID)
		completed := w.achievementMgr.IsPlayerCompleted(characterID, achievementID)
		percentage := w.achievementMgr.GetCompletionPercentage(characterID, achievementID)
		
		characterData[fmt.Sprintf("achievement_%d", achievementID)] = map[string]interface{}{
			"id":          achievementID,
			"title":       achievement.Title,
			"description": achievement.UncompletedText,
			"completed":   completed,
			"progress":    progress,
			"required":    achievement.QtyRequired,
			"percentage":  percentage,
			"points":      achievement.PointValue,
			"category":    achievement.Category,
			"expansion":   achievement.Expansion,
		}
	}
	
	fmt.Printf("Sending complete achievement list to %s: %d achievements\n", 
		client.CharacterName, len(allAchievements))
	
	// Send packet to client (placeholder - would use actual packet building)
	client.SendSimpleMessage(fmt.Sprintf("Character Achievements: %d total achievements", len(allAchievements)))
}

// calculateAchievementPoints calculates total achievement points for a character
func (w *World) calculateAchievementPoints(characterID int32) uint32 {
	if w.achievementMgr == nil {
		return 0
	}
	
	completedAchievements := w.achievementMgr.GetPlayerCompletedAchievements(characterID)
	totalPoints := uint32(0)
	
	for _, achievementID := range completedAchievements {
		achievement := w.achievementMgr.GetAchievement(achievementID)
		if achievement != nil {
			totalPoints += achievement.PointValue
		}
	}
	
	return totalPoints
}

// HandleTitleUpdate handles title update requests from client
func (w *World) HandleTitleUpdate(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested title update\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// Send current title data to client
		w.SendTitleData(client)
	}
	
	return nil
}

// HandleCharacterTitles handles character titles request from client
func (w *World) HandleCharacterTitles(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested character titles\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// Send complete title list to client
		w.SendCharacterTitles(client)
	}
	
	return nil
}

// HandleSetActiveTitle handles setting active title requests from client
func (w *World) HandleSetActiveTitle(ctx *packets.PacketContext, packet *packets.PacketData) error {
	fmt.Printf("Client %s requested to set active title\n", ctx.Client.GetCharacterName())
	
	client := w.clients.GetByCharacterID(ctx.Client.GetCharacterID())
	if client != nil {
		client.UpdateActivity()
		
		// TODO: Parse title ID and position from packet data
		// TODO: Validate player has the title
		// TODO: Set active title
		// TODO: Send confirmation to client
		
		// For now, just log the request
		fmt.Printf("Set active title request for %s processed\n", client.CharacterName)
	}
	
	return nil
}

// SendTitleData sends title data to a client
func (w *World) SendTitleData(client *Client) {
	if w.titleMgr == nil {
		return
	}
	
	characterID := client.CharacterID
	
	// Get player's titles
	playerTitles := w.titleMgr.GetPlayerTitles(characterID)
	titleCount := playerTitles.GetTitleCount()
	
	fmt.Printf("Sending title data to %s: %d titles\n", 
		client.CharacterName, titleCount)
	
	// Create title update packet (placeholder)
	client.SendSimpleMessage(fmt.Sprintf("Title Update: %d titles available", titleCount))
}

// SendCharacterTitles sends complete character titles to client
func (w *World) SendCharacterTitles(client *Client) {
	if w.titleMgr == nil {
		return
	}
	
	characterID := client.CharacterID
	
	// Get player's titles and master list
	playerTitles := w.titleMgr.GetPlayerTitles(characterID)
	masterList := w.titleMgr.titleManager.GetMasterList()
	
	titleCount := playerTitles.GetTitleCount()
	totalTitles := masterList.GetTitleCount()
	
	fmt.Printf("Sending complete title list to %s: %d owned out of %d total\n", 
		client.CharacterName, titleCount, totalTitles)
	
	// Get player's formatted name with titles
	formattedName := w.titleMgr.GetPlayerFormattedName(characterID, client.CharacterName)
	
	// Send packet to client (placeholder - would use actual packet building)
	client.SendSimpleMessage(fmt.Sprintf("Character Titles: %d owned, %d total. Display name: %s", 
		titleCount, totalTitles, formattedName))
}

// WorldDatabaseAdapter adapts the World's database for packet handlers
type WorldDatabaseAdapter struct {
	world *World
}

// GetCharacter implements packets.DatabaseInterface
func (wda *WorldDatabaseAdapter) GetCharacter(characterID int32) (map[string]interface{}, error) {
	// TODO: Implement character loading from database
	return nil, fmt.Errorf("character loading not yet implemented")
}

// SaveCharacter implements packets.DatabaseInterface
func (wda *WorldDatabaseAdapter) SaveCharacter(characterID int32, data map[string]interface{}) error {
	// TODO: Implement character saving to database
	return fmt.Errorf("character saving not yet implemented")
}

// WorldClientAdapter adapts World's Client to packets.ClientInterface
type WorldClientAdapter struct {
	client *Client
	world  *World
}

// GetCharacterID implements packets.ClientInterface
func (wca *WorldClientAdapter) GetCharacterID() int32 {
	return wca.client.CharacterID
}

// GetAccountID implements packets.ClientInterface
func (wca *WorldClientAdapter) GetAccountID() int32 {
	return wca.client.AccountID
}

// GetCharacterName implements packets.ClientInterface
func (wca *WorldClientAdapter) GetCharacterName() string {
	return wca.client.CharacterName
}

// GetClientVersion implements packets.ClientInterface
func (wca *WorldClientAdapter) GetClientVersion() int32 {
	return wca.client.GetClientVersion()
}

// GetAdminLevel implements packets.ClientInterface
func (wca *WorldClientAdapter) GetAdminLevel() int {
	return wca.client.AdminLevel
}

// IsInZone implements packets.ClientInterface
func (wca *WorldClientAdapter) IsInZone() bool {
	return wca.client.CurrentZone != nil
}

// SendPacket implements packets.ClientInterface
func (wca *WorldClientAdapter) SendPacket(opcode packets.InternalOpcode, data []byte) error {
	// TODO: Implement packet sending via UDP connection
	fmt.Printf("Sending packet %s to client %s\n", 
		packets.GetInternalOpcodeName(opcode), 
		wca.client.CharacterName)
	return nil
}

// Disconnect implements packets.ClientInterface
func (wca *WorldClientAdapter) Disconnect() error {
	wca.client.DisconnectWithReason("Disconnected by packet handler")
	return nil
}

// WorldServerAdapter adapts World to packets.WorldInterface
type WorldServerAdapter struct {
	world *World
}

// GetClientByID implements packets.WorldInterface
func (wsa *WorldServerAdapter) GetClientByID(characterID int32) packets.ClientInterface {
	client := wsa.world.clients.GetByCharacterID(characterID)
	if client != nil {
		return &WorldClientAdapter{client: client, world: wsa.world}
	}
	return nil
}

// GetAllClients implements packets.WorldInterface
func (wsa *WorldServerAdapter) GetAllClients() []packets.ClientInterface {
	clients := wsa.world.clients.GetAll()
	result := make([]packets.ClientInterface, len(clients))
	
	for i, client := range clients {
		result[i] = &WorldClientAdapter{client: client, world: wsa.world}
	}
	
	return result
}

// BroadcastPacket implements packets.WorldInterface
func (wsa *WorldServerAdapter) BroadcastPacket(opcode packets.InternalOpcode, data []byte) {
	// TODO: Implement packet broadcasting
	fmt.Printf("Broadcasting packet %s to all clients\n", packets.GetInternalOpcodeName(opcode))
}

// BroadcastToZone implements packets.WorldInterface
func (wsa *WorldServerAdapter) BroadcastToZone(zoneID int32, opcode packets.InternalOpcode, data []byte) {
	// TODO: Implement zone-specific broadcasting
	fmt.Printf("Broadcasting packet %s to zone %d\n", packets.GetInternalOpcodeName(opcode), zoneID)
}

// CreatePacketContext creates a packet context for a client
func (w *World) CreatePacketContext(client *Client) *packets.PacketContext {
	return &packets.PacketContext{
		Client:   &WorldClientAdapter{client: client, world: w},
		World:    &WorldServerAdapter{world: w},
		Database: &WorldDatabaseAdapter{world: w},
	}
}