package fights

import (
	"dk/internal/store"
	"fmt"
	"time"
)

// ActionEntry represents a compact fight action
type ActionEntry struct {
	Type int    `json:"t"`
	Data int    `json:"d,omitempty"`
	Name string `json:"n,omitempty"` // For spell names
}

// Action type constants
const (
	ActionAttackHit  = 1
	ActionAttackMiss = 2
	ActionSpellHeal  = 3
	ActionSpellHurt  = 4
	ActionRunSuccess = 5
	ActionRunFail    = 6
	ActionGeneric    = 7
)

// Fight represents a fight, past or present
type Fight struct {
	ID            int           `json:"id"`
	UserID        int           `json:"user_id"`
	MonsterID     int           `json:"monster_id"`
	MonsterHP     int           `json:"monster_hp"`
	MonsterMaxHP  int           `json:"monster_max_hp"`
	MonsterSleep  int           `json:"monster_sleep"`
	MonsterImmune int           `json:"monster_immune"`
	UberDamage    int           `json:"uber_damage"`
	UberDefense   int           `json:"uber_defense"`
	FirstStrike   bool          `json:"first_strike"`
	Turn          int           `json:"turn"`
	RanAway       bool          `json:"ran_away"`
	Victory       bool          `json:"victory"`
	Won           bool          `json:"won"`
	RewardGold    int           `json:"reward_gold"`
	RewardExp     int           `json:"reward_exp"`
	Actions       []ActionEntry `json:"actions"`
	Created       int64         `json:"created"`
	Updated       int64         `json:"updated"`
}

func (f *Fight) Save() error {
	f.Updated = time.Now().Unix()
	return GetStore().UpdateWithRebuild(f.ID, f)
}

func (f *Fight) Delete() error {
	GetStore().RemoveWithRebuild(f.ID)
	return nil
}

func New(userID, monsterID int) *Fight {
	now := time.Now().Unix()
	return &Fight{
		UserID:        userID,
		MonsterID:     monsterID,
		MonsterHP:     0,
		MonsterMaxHP:  0,
		MonsterSleep:  0,
		MonsterImmune: 0,
		UberDamage:    0,
		UberDefense:   0,
		FirstStrike:   false,
		Turn:          0,
		RanAway:       false,
		Victory:       false,
		Won:           false,
		RewardGold:    0,
		RewardExp:     0,
		Actions:       make([]ActionEntry, 0),
		Created:       now,
		Updated:       now,
	}
}

// Validate checks if fight has valid values
func (f *Fight) Validate() error {
	if f.UserID <= 0 {
		return fmt.Errorf("fight UserID must be positive")
	}
	if f.MonsterID <= 0 {
		return fmt.Errorf("fight MonsterID must be positive")
	}
	if f.Turn < 0 {
		return fmt.Errorf("fight Turn cannot be negative")
	}
	if f.MonsterHP < 0 {
		return fmt.Errorf("fight MonsterHP cannot be negative")
	}
	if f.Created <= 0 {
		return fmt.Errorf("fight Created timestamp must be positive")
	}
	if f.Updated <= 0 {
		return fmt.Errorf("fight Updated timestamp must be positive")
	}
	return nil
}

// Action methods for backward compatibility
func (f *Fight) AddAction(action string) {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionGeneric, Name: action})
	f.Updated = time.Now().Unix()
}

func (f *Fight) AddActionAttackHit(damage int) {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionAttackHit, Data: damage})
	f.Updated = time.Now().Unix()
}

func (f *Fight) AddActionAttackMiss() {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionAttackMiss})
	f.Updated = time.Now().Unix()
}

func (f *Fight) AddActionSpellHeal(spellName string, healAmount int) {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionSpellHeal, Data: healAmount, Name: spellName})
	f.Updated = time.Now().Unix()
}

func (f *Fight) AddActionSpellHurt(spellName string, damage int) {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionSpellHurt, Data: damage, Name: spellName})
	f.Updated = time.Now().Unix()
}

func (f *Fight) AddActionRunSuccess() {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionRunSuccess})
	f.Updated = time.Now().Unix()
}

func (f *Fight) AddActionRunFail() {
	f.Actions = append(f.Actions, ActionEntry{Type: ActionRunFail})
	f.Updated = time.Now().Unix()
}

// Convert actions to human-readable strings
func (f *Fight) GetActions() []string {
	result := make([]string, len(f.Actions))
	for i, action := range f.Actions {
		result[i] = f.actionToString(action)
	}
	return result
}

func (f *Fight) actionToString(action ActionEntry) string {
	switch action.Type {
	case ActionAttackHit:
		return fmt.Sprintf("You attacked for %d damage!", action.Data)
	case ActionAttackMiss:
		return "You missed your attack!"
	case ActionSpellHeal:
		return fmt.Sprintf("You cast %s and healed %d HP!", action.Name, action.Data)
	case ActionSpellHurt:
		return fmt.Sprintf("You cast %s and dealt %d damage!", action.Name, action.Data)
	case ActionRunSuccess:
		return "You successfully ran away!"
	case ActionRunFail:
		return "You failed to run away!"
	case ActionGeneric:
		return action.Name
	default:
		return "Unknown action"
	}
}

func (f *Fight) GetLastAction() string {
	if len(f.Actions) == 0 {
		return ""
	}
	return f.actionToString(f.Actions[len(f.Actions)-1])
}

func (f *Fight) ClearActions() {
	f.Actions = make([]ActionEntry, 0)
	f.Updated = time.Now().Unix()
}

// FightStore with enhanced BaseStore
type FightStore struct {
	*store.BaseStore[Fight]
}

// Global store with singleton pattern
var GetStore = store.NewSingleton(func() *FightStore {
	fs := &FightStore{BaseStore: store.NewBaseStore[Fight]()}

	// Register indices
	fs.RegisterIndex("byUserID", store.BuildIntGroupIndex(func(f *Fight) int {
		return f.UserID
	}))

	fs.RegisterIndex("byMonsterID", store.BuildIntGroupIndex(func(f *Fight) int {
		return f.MonsterID
	}))

	fs.RegisterIndex("activeFights", store.BuildFilteredIntGroupIndex(
		func(f *Fight) bool {
			return !f.RanAway && !f.Victory
		},
		func(f *Fight) int {
			return f.UserID
		},
	))

	fs.RegisterIndex("allByCreated", store.BuildSortedListIndex(func(a, b *Fight) bool {
		if a.Created != b.Created {
			return a.Created > b.Created // DESC
		}
		return a.ID > b.ID // DESC
	}))

	fs.RegisterIndex("allByUpdated", store.BuildSortedListIndex(func(a, b *Fight) bool {
		if a.Updated != b.Updated {
			return a.Updated > b.Updated // DESC
		}
		return a.ID > b.ID // DESC
	}))

	return fs
})

// Enhanced CRUD operations
func (fs *FightStore) AddFight(fight *Fight) error {
	return fs.AddWithRebuild(fight.ID, fight)
}

func (fs *FightStore) RemoveFight(id int) {
	fs.RemoveWithRebuild(id)
}

func (fs *FightStore) UpdateFight(fight *Fight) error {
	return fs.UpdateWithRebuild(fight.ID, fight)
}

// Data persistence
func LoadData(dataPath string) error {
	fs := GetStore()
	return fs.BaseStore.LoadData(dataPath)
}

func SaveData(dataPath string) error {
	fs := GetStore()
	return fs.BaseStore.SaveData(dataPath)
}

// Query functions using enhanced store
func Find(id int) (*Fight, error) {
	fs := GetStore()
	fight, exists := fs.Find(id)
	if !exists {
		return nil, fmt.Errorf("fight with ID %d not found", id)
	}
	return fight, nil
}

func All() ([]*Fight, error) {
	fs := GetStore()
	return fs.AllSorted("allByCreated"), nil
}

func ByUserID(userID int) ([]*Fight, error) {
	fs := GetStore()
	return fs.GroupByIndex("byUserID", userID), nil
}

func ByMonsterID(monsterID int) ([]*Fight, error) {
	fs := GetStore()
	return fs.GroupByIndex("byMonsterID", monsterID), nil
}

func ActiveByUserID(userID int) ([]*Fight, error) {
	fs := GetStore()
	return fs.GroupByIndex("activeFights", userID), nil
}

func Active() ([]*Fight, error) {
	fs := GetStore()
	result := fs.FilterByIndex("allByCreated", func(f *Fight) bool {
		return !f.RanAway && !f.Victory
	})
	return result, nil
}

func Recent(within time.Duration) ([]*Fight, error) {
	fs := GetStore()
	cutoff := time.Now().Add(-within).Unix()

	result := fs.FilterByIndex("allByCreated", func(f *Fight) bool {
		return f.Created >= cutoff
	})

	return result, nil
}

// Insert with ID assignment
func (f *Fight) Insert() error {
	fs := GetStore()
	if f.ID == 0 {
		f.ID = fs.GetNextID()
	}
	f.Updated = time.Now().Unix()
	return fs.AddFight(f)
}

// Helper methods
func (f *Fight) CreatedTime() time.Time {
	return time.Unix(f.Created, 0)
}

func (f *Fight) UpdatedTime() time.Time {
	return time.Unix(f.Updated, 0)
}

func (f *Fight) IsActive() bool {
	return !f.RanAway && !f.Victory
}

func (f *Fight) IsComplete() bool {
	return f.RanAway || f.Victory
}

func (f *Fight) GetStatus() string {
	if f.Won {
		return "Won"
	}
	if f.Victory && !f.Won {
		return "Lost"
	}
	if f.RanAway {
		return "Ran Away"
	}
	return "Active"
}

func (f *Fight) GetMonsterHealthPercent() float64 {
	if f.MonsterMaxHP <= 0 {
		return 0.0
	}
	return float64(f.MonsterHP) / float64(f.MonsterMaxHP) * 100.0
}

func (f *Fight) IsMonsterSleeping() bool {
	return f.MonsterSleep > 0
}

func (f *Fight) IsMonsterImmune() bool {
	return f.MonsterImmune > 0
}

func (f *Fight) HasUberBonus() bool {
	return f.UberDamage > 0 || f.UberDefense > 0
}

func (f *Fight) GetDuration() time.Duration {
	return time.Unix(f.Updated, 0).Sub(time.Unix(f.Created, 0))
}

func (f *Fight) EndFight(victory bool) {
	f.Victory = victory
	f.RanAway = !victory
	f.Updated = time.Now().Unix()
}

func (f *Fight) WinFight(goldReward, expReward int) {
	f.Victory = true
	f.Won = true
	f.RanAway = false
	f.RewardGold = goldReward
	f.RewardExp = expReward
	f.Updated = time.Now().Unix()
}

func (f *Fight) LoseFight() {
	f.Victory = true
	f.Won = false
	f.RanAway = false
	f.Updated = time.Now().Unix()
}

func (f *Fight) RunAway() {
	f.RanAway = true
	f.Victory = false
	f.Updated = time.Now().Unix()
}

func (f *Fight) IncrementTurn() {
	f.Turn++
	f.Updated = time.Now().Unix()
}

func (f *Fight) SetMonsterHP(hp int) {
	f.MonsterHP = hp
	f.Updated = time.Now().Unix()
}

func (f *Fight) DamageMonster(damage int) {
	f.MonsterHP -= damage
	if f.MonsterHP < 0 {
		f.MonsterHP = 0
	}
	f.Updated = time.Now().Unix()
}