package spells

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

// Spell represents a spell in the game
type Spell struct {
	ID        int    `json:"id"`
	Name      string `json:"name"`
	MP        int    `json:"mp"`
	Attribute int    `json:"attribute"`
	Type      int    `json:"type"`
}

func (s *Spell) Save() error {
	return GetStore().UpdateWithRebuild(s.ID, s)
}

func (s *Spell) Delete() error {
	GetStore().RemoveWithRebuild(s.ID)
	return nil
}

// Creates a new Spell with sensible defaults
func New() *Spell {
	return &Spell{
		Name:      "",
		MP:        5,           // Default MP cost
		Attribute: 10,          // Default attribute value
		Type:      TypeHealing, // Default to healing spell
	}
}

// Validate checks if spell has valid values
func (s *Spell) Validate() error {
	if s.Name == "" {
		return fmt.Errorf("spell name cannot be empty")
	}
	if s.MP < 0 {
		return fmt.Errorf("spell MP cannot be negative")
	}
	if s.Attribute < 0 {
		return fmt.Errorf("spell Attribute cannot be negative")
	}
	if s.Type < TypeHealing || s.Type > TypeDefenseBoost {
		return fmt.Errorf("invalid spell type: %d", s.Type)
	}
	return nil
}

// SpellType constants for spell types
const (
	TypeHealing      = 1
	TypeHurt         = 2
	TypeSleep        = 3
	TypeAttackBoost  = 4
	TypeDefenseBoost = 5
)

// SpellStore with enhanced BaseStore
type SpellStore struct {
	*store.BaseStore[Spell]
}

// Global store with singleton pattern
var GetStore = store.NewSingleton(func() *SpellStore {
	ss := &SpellStore{BaseStore: store.NewBaseStore[Spell]()}

	// Register indices
	ss.RegisterIndex("byType", store.BuildIntGroupIndex(func(s *Spell) int {
		return s.Type
	}))

	ss.RegisterIndex("byName", store.BuildCaseInsensitiveLookupIndex(func(s *Spell) string {
		return s.Name
	}))

	ss.RegisterIndex("byMP", store.BuildIntGroupIndex(func(s *Spell) int {
		return s.MP
	}))

	ss.RegisterIndex("allByTypeMP", store.BuildSortedListIndex(func(a, b *Spell) bool {
		if a.Type != b.Type {
			return a.Type < b.Type
		}
		if a.MP != b.MP {
			return a.MP < b.MP
		}
		return a.ID < b.ID
	}))

	return ss
})

// Enhanced CRUD operations
func (ss *SpellStore) AddSpell(spell *Spell) error {
	return ss.AddWithRebuild(spell.ID, spell)
}

func (ss *SpellStore) RemoveSpell(id int) {
	ss.RemoveWithRebuild(id)
}

func (ss *SpellStore) UpdateSpell(spell *Spell) error {
	return ss.UpdateWithRebuild(spell.ID, spell)
}

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

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

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

func All() ([]*Spell, error) {
	ss := GetStore()
	return ss.AllSorted("allByTypeMP"), nil
}

func ByType(spellType int) ([]*Spell, error) {
	ss := GetStore()
	return ss.GroupByIndex("byType", spellType), nil
}

func ByMaxMP(maxMP int) ([]*Spell, error) {
	ss := GetStore()
	return ss.FilterByIndex("allByTypeMP", func(s *Spell) bool {
		return s.MP <= maxMP
	}), nil
}

func ByTypeAndMaxMP(spellType, maxMP int) ([]*Spell, error) {
	ss := GetStore()
	return ss.FilterByIndex("allByTypeMP", func(s *Spell) bool {
		return s.Type == spellType && s.MP <= maxMP
	}), nil
}

func ByName(name string) (*Spell, error) {
	ss := GetStore()
	spell, exists := ss.LookupByIndex("byName", strings.ToLower(name))
	if !exists {
		return nil, fmt.Errorf("spell with name '%s' not found", name)
	}
	return spell, nil
}

// Insert with ID assignment
func (s *Spell) Insert() error {
	ss := GetStore()
	if s.ID == 0 {
		s.ID = ss.GetNextID()
	}
	return ss.AddSpell(s)
}

// Helper methods
func (s *Spell) IsHealing() bool {
	return s.Type == TypeHealing
}

func (s *Spell) IsHurt() bool {
	return s.Type == TypeHurt
}

func (s *Spell) IsSleep() bool {
	return s.Type == TypeSleep
}

func (s *Spell) IsAttackBoost() bool {
	return s.Type == TypeAttackBoost
}

func (s *Spell) IsDefenseBoost() bool {
	return s.Type == TypeDefenseBoost
}

func (s *Spell) TypeName() string {
	switch s.Type {
	case TypeHealing:
		return "Healing"
	case TypeHurt:
		return "Hurt"
	case TypeSleep:
		return "Sleep"
	case TypeAttackBoost:
		return "Attack Boost"
	case TypeDefenseBoost:
		return "Defense Boost"
	default:
		return "Unknown"
	}
}

func (s *Spell) CanCast(availableMP int) bool {
	return availableMP >= s.MP
}

func (s *Spell) Efficiency() float64 {
	if s.MP == 0 {
		return 0
	}
	return float64(s.Attribute) / float64(s.MP)
}

func (s *Spell) IsOffensive() bool {
	return s.Type == TypeHurt || s.Type == TypeSleep
}

func (s *Spell) IsSupport() bool {
	return s.Type == TypeHealing || s.Type == TypeAttackBoost || s.Type == TypeDefenseBoost
}