package quests

import "fmt"

// Player interface defines the required player functionality for quest system
type Player interface {
	// Basic player information
	GetID() int32
	GetName() string
	GetLevel() int8
	GetTSLevel() int8
	GetClass() int8
	GetTSClass() int8
	GetRace() int8

	// Client interface for packet sending
	GetClient() Client

	// Quest-related player methods
	GetQuest(questID int32) *Quest
	HasQuest(questID int32) bool
	HasQuestBeenCompleted(questID int32) bool
	AddQuest(quest *Quest) error
	RemoveQuest(questID int32) bool

	// Position and zone information
	GetX() float32
	GetY() float32
	GetZ() float32
	GetZoneID() int32

	// Faction information
	GetFactionValue(factionID int32) int32

	// Experience and rewards
	AddCoins(amount int64)
	AddExp(amount int32)
	AddTSExp(amount int32)
	AddStatusPoints(amount int32)

	// Inventory management
	GetPlayerItemList() ItemList

	// Arrow color calculation (difficulty indication)
	GetArrowColor(level int8) int8
	GetTSArrowColor(level int8) int8
}

// Client interface defines client functionality needed for quest system
type Client interface {
	// Basic client information
	GetVersion() int16
	GetNameCRC() int32
	GetPlayer() Player

	// Packet sending
	QueuePacket(packet Packet)
	SimpleMessage(color int32, message string)

	// Quest-specific client methods
	SendQuestJournalUpdate(quest *Quest, forceUpdate bool)
	PopulateQuestRewardItems(items *[]Item, packet PacketStruct, arrayName ...string)
}

// Spawn interface defines spawn functionality needed for quest system
type Spawn interface {
	// Basic spawn information
	GetID() int32
	GetDatabaseID() int32
	GetName() string
	GetRace() int8
	GetModelType() int16

	// Position information
	GetX() float32
	GetY() float32
	GetZ() float32
	GetZoneID() int32
}

// Spell interface defines spell functionality needed for quest system
type Spell interface {
	GetSpellID() int32
	GetName() string
}

// Item interface defines item functionality needed for quest system
type Item interface {
	GetItemID() int32
	GetName() string
	GetIcon(version int16) int32
	GetDetails() ItemDetails
	GetStackCount() int32
}

// ItemDetails interface defines item detail functionality
type ItemDetails interface {
	GetItemID() int32
	GetUniqueID() int32
	GetCount() int32
}

// ItemList interface defines item list functionality
type ItemList interface {
	GetItemFromID(itemID int32, count int32) Item
}

// Packet interface defines packet functionality
type Packet interface {
	// Packet data methods (placeholder)
	Serialize() []byte
}

// PacketStruct interface defines packet structure functionality
type PacketStruct interface {
	// Packet building methods
	SetDataByName(name string, value any, index ...int)
	SetArrayLengthByName(name string, length int)
	SetArrayDataByName(name string, value any, index int)
	SetSubArrayLengthByName(name string, length int, index int)
	SetSubArrayDataByName(name string, value any, index1, index2 int)
	SetSubstructArrayDataByName(substruct, name string, value any, index int)
	SetItemArrayDataByName(name string, item Item, player Player, index int, flag ...int)
	Serialize() Packet
	GetVersion() int16
}

// QuestOfferer interface defines NPCs that can offer quests
type QuestOfferer interface {
	Spawn
	GetOfferedQuests() []int32
	CanOfferQuest(questID int32, player Player) bool
	OfferQuest(questID int32, player Player) error
}

// QuestReceiver interface defines NPCs that can receive completed quests
type QuestReceiver interface {
	Spawn
	GetAcceptedQuests() []int32
	CanAcceptQuest(questID int32, player Player) bool
	AcceptCompletedQuest(questID int32, player Player) error
}

// QuestValidator interface defines quest validation functionality
type QuestValidator interface {
	ValidatePrerequisites(quest *Quest, player Player) error
	ValidateQuestCompletion(quest *Quest, player Player) error
	ValidateQuestSharing(quest *Quest, sharer, receiver Player) error
}

// QuestRewardProcessor interface defines quest reward processing
type QuestRewardProcessor interface {
	ProcessQuestRewards(quest *Quest, player Player) error
	CalculateRewards(quest *Quest, player Player) *QuestRewards
	GiveRewards(rewards *QuestRewards, player Player) error
}

// QuestRewards contains calculated quest rewards
type QuestRewards struct {
	Coins          int64           `json:"coins"`
	Experience     int32           `json:"experience"`
	TSExperience   int32           `json:"ts_experience"`
	StatusPoints   int32           `json:"status_points"`
	Items          []Item          `json:"items"`
	FactionRewards map[int32]int32 `json:"faction_rewards"`
}

// QuestEventHandler interface defines quest event handling
type QuestEventHandler interface {
	OnQuestStarted(quest *Quest, player Player)
	OnQuestStepCompleted(quest *Quest, step *QuestStep, player Player)
	OnQuestCompleted(quest *Quest, player Player)
	OnQuestFailed(quest *Quest, step *QuestStep, player Player)
	OnQuestAbandoned(quest *Quest, player Player)
	OnQuestShared(quest *Quest, sharer, receiver Player)
}

// Database interface defines database operations for quest system
type Database interface {
	// Quest CRUD operations
	LoadQuest(questID int32) (*Quest, error)
	SaveQuest(quest *Quest) error
	DeleteQuest(questID int32) error
	LoadAllQuests() ([]*Quest, error)

	// Player quest operations
	LoadPlayerQuests(playerID int32) ([]*Quest, error)
	SavePlayerQuest(playerID int32, quest *Quest) error
	DeletePlayerQuest(playerID, questID int32) error
	MarkQuestCompleted(playerID, questID int32) error
	IsQuestCompleted(playerID, questID int32) bool

	// Quest step operations
	SaveQuestStepProgress(playerID, questID, stepID int32, progress int32) error
	LoadQuestStepProgress(playerID, questID, stepID int32) (int32, error)
}

// Logger interface defines logging functionality for quest system
type Logger interface {
	LogInfo(message string, args ...any)
	LogError(message string, args ...any)
	LogDebug(message string, args ...any)
	LogWarning(message string, args ...any)
}

// Configuration interface defines quest system configuration
type Configuration interface {
	GetMaxPlayerQuests() int
	GetQuestSharingEnabled() bool
	GetQuestFailureEnabled() bool
	GetQuestTimersEnabled() bool
	GetXPBonusMultiplier() float64
	GetCoinBonusMultiplier() float64
	GetStatusBonusMultiplier() float64
}

// QuestSystemAdapter provides integration with other game systems
type QuestSystemAdapter struct {
	questManager    *QuestManager
	validator       QuestValidator
	rewardProcessor QuestRewardProcessor
	eventHandler    QuestEventHandler
	database        Database
	logger          Logger
	config          Configuration
}

// NewQuestSystemAdapter creates a new quest system adapter
func NewQuestSystemAdapter(questManager *QuestManager, validator QuestValidator, rewardProcessor QuestRewardProcessor, eventHandler QuestEventHandler, database Database, logger Logger, config Configuration) *QuestSystemAdapter {
	return &QuestSystemAdapter{
		questManager:    questManager,
		validator:       validator,
		rewardProcessor: rewardProcessor,
		eventHandler:    eventHandler,
		database:        database,
		logger:          logger,
		config:          config,
	}
}

// StartQuest handles starting a new quest for a player
func (qsa *QuestSystemAdapter) StartQuest(questID int32, player Player) error {
	// Get quest from master list
	quest := qsa.questManager.GetMasterList().GetQuest(questID, true)
	if quest == nil {
		return fmt.Errorf("quest %d not found", questID)
	}

	// Validate prerequisites
	if qsa.validator != nil {
		if err := qsa.validator.ValidatePrerequisites(quest, player); err != nil {
			return fmt.Errorf("quest prerequisites not met: %w", err)
		}
	}

	// Check if player can accept more quests
	if qsa.config != nil {
		maxQuests := qsa.config.GetMaxPlayerQuests()
		if maxQuests > 0 && qsa.questManager.GetPlayerQuestCount(player.GetID()) >= maxQuests {
			return fmt.Errorf("player has too many active quests")
		}
	}

	// Give quest to player
	_, err := qsa.questManager.GiveQuestToPlayer(player.GetID(), questID)
	if err != nil {
		return err
	}

	// Save to database
	if qsa.database != nil {
		if err := qsa.database.SavePlayerQuest(player.GetID(), quest); err != nil {
			qsa.logger.LogError("Failed to save player quest to database: %v", err)
		}
	}

	// Trigger event
	if qsa.eventHandler != nil {
		qsa.eventHandler.OnQuestStarted(quest, player)
	}

	// Log
	if qsa.logger != nil {
		qsa.logger.LogInfo("Player %s (%d) started quest %s (%d)", player.GetName(), player.GetID(), quest.Name, questID)
	}

	return nil
}

// CompleteQuest handles completing a quest for a player
func (qsa *QuestSystemAdapter) CompleteQuest(questID int32, player Player) error {
	// Get player's quest
	quest := qsa.questManager.GetPlayerQuest(player.GetID(), questID)
	if quest == nil {
		return fmt.Errorf("player does not have quest %d", questID)
	}

	// Validate completion
	if qsa.validator != nil {
		if err := qsa.validator.ValidateQuestCompletion(quest, player); err != nil {
			return fmt.Errorf("quest completion validation failed: %w", err)
		}
	}

	// Check if quest is actually complete
	if !quest.GetCompleted() {
		return fmt.Errorf("quest is not complete")
	}

	// Process rewards
	if qsa.rewardProcessor != nil {
		if err := qsa.rewardProcessor.ProcessQuestRewards(quest, player); err != nil {
			qsa.logger.LogError("Failed to process quest rewards: %v", err)
			return fmt.Errorf("failed to process quest rewards: %w", err)
		}
	}

	// Mark as completed in database
	if qsa.database != nil {
		if err := qsa.database.MarkQuestCompleted(player.GetID(), questID); err != nil {
			qsa.logger.LogError("Failed to mark quest as completed in database: %v", err)
		}
	}

	// Remove from active quests if not repeatable
	if !quest.Repeatable {
		qsa.questManager.RemoveQuestFromPlayer(player.GetID(), questID)
	}

	// Trigger event
	if qsa.eventHandler != nil {
		qsa.eventHandler.OnQuestCompleted(quest, player)
	}

	// Log
	if qsa.logger != nil {
		qsa.logger.LogInfo("Player %s (%d) completed quest %s (%d)", player.GetName(), player.GetID(), quest.Name, questID)
	}

	return nil
}

// UpdateQuestProgress handles updating quest step progress
func (qsa *QuestSystemAdapter) UpdateQuestProgress(questID, stepID, progress int32, player Player) error {
	// Get player's quest
	quest := qsa.questManager.GetPlayerQuest(player.GetID(), questID)
	if quest == nil {
		return fmt.Errorf("player does not have quest %d", questID)
	}

	// Update progress
	if !quest.AddStepProgress(stepID, progress) {
		return fmt.Errorf("failed to update quest step progress")
	}

	// Check if step is now complete
	step := quest.GetQuestStep(stepID)
	if step != nil && step.Complete() {
		// Execute complete action if exists
		if quest.HasCompleteAction(stepID) {
			if err := quest.ExecuteCompleteAction(stepID); err != nil {
				qsa.logger.LogError("Failed to execute quest step complete action: %v", err)
			}
		}

		// Trigger event
		if qsa.eventHandler != nil {
			qsa.eventHandler.OnQuestStepCompleted(quest, step, player)
		}

		// Log
		if qsa.logger != nil {
			qsa.logger.LogInfo("Player %s (%d) completed step %d of quest %s (%d)", player.GetName(), player.GetID(), stepID, quest.Name, questID)
		}
	}

	// Save progress to database
	if qsa.database != nil {
		if err := qsa.database.SaveQuestStepProgress(player.GetID(), questID, stepID, step.GetStepProgress()); err != nil {
			qsa.logger.LogError("Failed to save quest step progress to database: %v", err)
		}
	}

	return nil
}

// AbandonQuest handles abandoning a quest
func (qsa *QuestSystemAdapter) AbandonQuest(questID int32, player Player) error {
	// Get player's quest
	quest := qsa.questManager.GetPlayerQuest(player.GetID(), questID)
	if quest == nil {
		return fmt.Errorf("player does not have quest %d", questID)
	}

	// Check if quest can be abandoned
	if !quest.CanDeleteQuest {
		return fmt.Errorf("quest cannot be abandoned")
	}

	// Remove from player
	if !qsa.questManager.RemoveQuestFromPlayer(player.GetID(), questID) {
		return fmt.Errorf("failed to remove quest from player")
	}

	// Remove from database
	if qsa.database != nil {
		if err := qsa.database.DeletePlayerQuest(player.GetID(), questID); err != nil {
			qsa.logger.LogError("Failed to delete player quest from database: %v", err)
		}
	}

	// Trigger event
	if qsa.eventHandler != nil {
		qsa.eventHandler.OnQuestAbandoned(quest, player)
	}

	// Log
	if qsa.logger != nil {
		qsa.logger.LogInfo("Player %s (%d) abandoned quest %s (%d)", player.GetName(), player.GetID(), quest.Name, questID)
	}

	return nil
}

// ShareQuest handles sharing a quest between players
func (qsa *QuestSystemAdapter) ShareQuest(questID int32, sharer, receiver Player) error {
	if !qsa.config.GetQuestSharingEnabled() {
		return fmt.Errorf("quest sharing is disabled")
	}

	// Get sharer's quest
	quest := qsa.questManager.GetPlayerQuest(sharer.GetID(), questID)
	if quest == nil {
		return fmt.Errorf("sharer does not have quest %d", questID)
	}

	// Validate sharing
	if qsa.validator != nil {
		if err := qsa.validator.ValidateQuestSharing(quest, sharer, receiver); err != nil {
			return fmt.Errorf("quest sharing validation failed: %w", err)
		}
	}

	// Check if receiver can accept more quests
	if qsa.config != nil {
		maxQuests := qsa.config.GetMaxPlayerQuests()
		if maxQuests > 0 && qsa.questManager.GetPlayerQuestCount(receiver.GetID()) >= maxQuests {
			return fmt.Errorf("receiver has too many active quests")
		}
	}

	// Give quest to receiver
	_, err := qsa.questManager.GiveQuestToPlayer(receiver.GetID(), questID)
	if err != nil {
		return fmt.Errorf("failed to give quest to receiver: %w", err)
	}

	// Save to database
	if qsa.database != nil {
		receiverQuest := qsa.questManager.GetPlayerQuest(receiver.GetID(), questID)
		if err := qsa.database.SavePlayerQuest(receiver.GetID(), receiverQuest); err != nil {
			qsa.logger.LogError("Failed to save shared quest to database: %v", err)
		}
	}

	// Trigger event
	if qsa.eventHandler != nil {
		qsa.eventHandler.OnQuestShared(quest, sharer, receiver)
	}

	// Log
	if qsa.logger != nil {
		qsa.logger.LogInfo("Player %s (%d) shared quest %s (%d) with %s (%d)",
			sharer.GetName(), sharer.GetID(), quest.Name, questID, receiver.GetName(), receiver.GetID())
	}

	return nil
}