package player

import (
	"sort"

	"thehouseoficarus/internal/behavior"
	"thehouseoficarus/internal/item"
)

type SkillName string

const (
	Accuracy     SkillName = "accuracy"
	Strength     SkillName = "strength"
	Defense      SkillName = "defense"
	Hitpoints    SkillName = "hitpoints"
	Ranged       SkillName = "ranged"
	Science      SkillName = "science"
	Technology   SkillName = "technology"
	Fishing      SkillName = "fishing"
	Cooking      SkillName = "cooking"
	Woodcutting  SkillName = "woodcutting"
	Firemaking   SkillName = "firemaking"
	Mining       SkillName = "mining"
	Smithing     SkillName = "smithing"
	Crafting     SkillName = "crafting"
	Fletching    SkillName = "fletching"
	Pharmacy     SkillName = "pharmacy"
	Thieving     SkillName = "thieving"
	Agility      SkillName = "agility"
	Construction SkillName = "construction"
	Scavenging   SkillName = "scavenging"
	Hacking      SkillName = "hacking"
	Assassin     SkillName = "assassin"
	Farming      SkillName = "farming"
)

var AllSkills = []SkillName{
	Accuracy, Strength, Defense, Hitpoints, Ranged, Science, Technology,
	Fishing, Cooking, Woodcutting, Firemaking, Mining, Smithing, Crafting, Fletching,
	Pharmacy, Thieving, Agility, Construction, Scavenging, Hacking, Assassin, Farming,
}

var SkillAbbr = map[SkillName]string{
	Accuracy:     "acc",
	Strength:     "str",
	Defense:      "def",
	Hitpoints:    "hp",
	Ranged:       "rng",
	Science:      "sci",
	Technology:   "tec",
	Fishing:      "fsh",
	Cooking:      "cok",
	Woodcutting:  "wdc",
	Firemaking:   "fmk",
	Mining:       "min",
	Smithing:     "smt",
	Crafting:     "cft",
	Fletching:    "flt",
	Pharmacy:     "phr",
	Thieving:     "thv",
	Agility:      "agl",
	Construction: "con",
	Scavenging:   "scv",
	Hacking:      "hck",
	Assassin:     "asm",
	Farming:      "frm",
}

type AttackStyle string

const (
	Accurate   AttackStyle = "accurate"
	Aggressive AttackStyle = "aggressive"
	Defensive  AttackStyle = "defensive"
	Balanced   AttackStyle = "balanced"
)

type Skill struct {
	Name SkillName
	XP   int
}

func (s Skill) Level() int {
	return LevelForXP(s.XP)
}

type InventorySlot struct {
	ItemID     string `yaml:"item_id"`
	Quantity   int    `yaml:"quantity"`
	Quality    int    `yaml:"quality,omitempty"`
	MaxQuality int    `yaml:"max_quality,omitempty"`
}

type OptionType int

const (
	OptBool OptionType = iota
	OptString
	OptInt
)

type OptionDef struct {
	Name        string
	Type        OptionType
	Default     any
	ValidValues []string
	Description string
}

var OptionDefs = []OptionDef{
	{"description", OptBool, true, nil, "Long room descriptions when moving"},
	{"tiny_map", OptString, "right", []string{"off", "right", "left"}, "Mini-map display (off/right/left)"},
	{"xp_drops", OptBool, true, nil, "XP drop messages"},
	{"exits", OptBool, true, nil, "Long exit display in look"},
	{"mob_enter", OptBool, true, nil, "Messages when mobs enter the room"},
	{"mob_leave", OptBool, true, nil, "Messages when mobs leave the room"},
	{"mob_spawn", OptBool, true, nil, "Messages when mobs spawn in the area"},
	{"reserve", OptBool, true, nil, "Show full reserved item details"},
	{"depletion", OptBool, false, nil, "Show depletion and despawn timers"},
	{"despawn", OptBool, false, nil, "Show ground item despawn timers"},
	{"color", OptString, "xterm256", []string{"none", "ansi", "xterm256"}, "Color output mode"},
	{"map_width", OptInt, 30, nil, "Map width for the map command"},
	{"map_height", OptInt, 20, nil, "Map height for the map command"},
	{"map_padding", OptString, "none", []string{"none", "x", "y", "xy"}, "Map output padding mode"},
	{"automap", OptBool, false, nil, "Show map automatically after moving"},
	{"show_queued_cmds", OptBool, false, nil, "Show confirmation messages for queued tick actions"},
	{"wrap_width", OptInt, 80, nil, "Wrap all output to this many columns (minimum 80)"},
	{"unicode", OptBool, true, nil, "Unicode box-drawing characters"},
	{"card_size", OptInt, 9, nil, "Casino card size (1, 5, 7, or 9)"},
	{"card_style", OptString, "dark", []string{"dark", "light"}, "Casino card style (dark or light)"},
	{"visual_ticks", OptBool, false, nil, "Display a tick marker every game tick"},
	{"visual_tick_count", OptInt, 0, nil, "Cycle length for tick counter (0 = no counter)"},
	{"visual_tick_text", OptString, "Tick", nil, "Text displayed for visual ticks"},
	{"fletch_all", OptBool, false, nil, "Auto-start fletching when only one product is possible"},
	{"smith_all", OptBool, false, nil, "Auto-start smithing when only one product is possible"},
	{"cook_all", OptBool, false, nil, "Auto-start cooking when only one product is possible"},
	{"smelt_all", OptBool, false, nil, "Auto-start smelting when only one product is possible"},
	{"mix_all", OptBool, false, nil, "Auto-start mixing when only one product is possible"},
	{"construct_all", OptBool, false, nil, "Auto-start constructing when only one product is possible"},
	{"craft_all", OptBool, false, nil, "Auto-start crafting when only one product is possible"},

	{"danger_warning", OptBool, true, nil, "Confirm before entering a dangerous (hazardous) area"},
	{"prompt_break", OptString, "on", []string{"on", "off"}, "Line break after prompt before output"},
}

var optionByName map[string]*OptionDef

func init() {
	optionByName = make(map[string]*OptionDef, len(OptionDefs))
	for i := range OptionDefs {
		optionByName[OptionDefs[i].Name] = &OptionDefs[i]
	}
}

func GetOptionDef(name string) *OptionDef {
	return optionByName[name]
}

type Player struct {
	Name                   string                    `yaml:"name"`
	Skills                 map[SkillName]int         `yaml:"skills"`
	Inventory              map[int]*InventorySlot    `yaml:"inventory"`
	Bank                   map[int]*InventorySlot    `yaml:"bank"`
	Equipment              map[item.EquipSlot]string `yaml:"equipment"`
	EquipQuality           map[string]int            `yaml:"equip_quality,omitempty"`
	RoomID                 int                       `yaml:"room_id"`
	HP                     int                       `yaml:"hp"`
	Credits                int                       `yaml:"credits"`
	BankedCredits          int                       `yaml:"banked_credits"`
	Description            string                    `yaml:"description"`
	AttackStyle            AttackStyle               `yaml:"attack_style"`
	Prompt                 string                    `yaml:"prompt"`
	Options                map[string]any            `yaml:"-"`
	Flags                  map[string]any            `yaml:"flags"`
	PendingSequence        *PendingSequence          `yaml:"pending_sequence,omitempty"`
	RegenerateTick         int
	AmmoQty                int                   `yaml:"ammo_qty,omitempty"`
	Action                 *behavior.Action      `yaml:"-"`
	BackgroundAction       *behavior.Action      `yaml:"-"`
	WalkSequence           []string              `yaml:"-"`
	ConsumeCooldown        int                   `yaml:"-"`
	HomeTransportCooldown  int                   `yaml:"-"`
	MoveTicks              int                   `yaml:"-"`
	MoveDirection          string                `yaml:"-"`
	MoveTarget             int                   `yaml:"-"`
	MovePendingTrigger     *behavior.Trigger     `yaml:"-"`
	MoveUsesEnergy         bool                  `yaml:"-"`
	EscapeDir              string                `yaml:"-"`
	EscapeTarget           int                   `yaml:"-"`
	EscapeTrigger          *behavior.Trigger     `yaml:"-"`
	EscapeIsWalk           bool                  `yaml:"-"`
	EscapeFailCount        int                   `yaml:"-"`
	VisualTickCurrent      int                   `yaml:"-"`
	AutotriggerMod         string                `yaml:"-"`
	QueuedTrigger          string                `yaml:"-"`
	AttackTimer            int                   `yaml:"-"`
	HazardTimer            int                   `yaml:"-"`
	PendingDangerDir       string                `yaml:"-"`
	Battery                float64               `yaml:"battery"`
	RunEnergy              int                   `yaml:"run_energy,omitempty"`
	RunEnergyAccum         int                   `yaml:"-"`
	ActiveTechs            map[string]bool       `yaml:"-"`
	QuickTech              string                `yaml:"quick_tech,omitempty"`
	TechActivatedSinceTick map[string]bool       `yaml:"-"`
	Sneaking               bool                  `yaml:"-"`
	SneakNotified          map[string]bool       `yaml:"-"`
	ActiveBuffs            []PotionBuff          `yaml:"-"`
	MapSymbols             map[int]MapSymbolData `yaml:"map_symbols,omitempty"`
	Stats                  PlayerStats           `yaml:"stats"`
	GodMode                bool                  `yaml:"-"`
	GodBackup              map[SkillName]int     `yaml:"-"`
}

type MapSymbolData struct {
	Char  string `yaml:"char"`
	Color string `yaml:"color,omitempty"`
}

// PendingSequence is the persisted snapshot of an in-flight LOCKED trigger
// sequence (Trigger.Lock == true). Unlocked sequences are never persisted.
// On reconnect, the game rebuilds a sequence from this snapshot and resumes
// it from the saved Wait offset.
type PendingSequence struct {
	Key     string          `yaml:"key"`
	RoomID  int             `yaml:"room_id"`
	Steps   []behavior.Step `yaml:"steps"`
	Wait    int             `yaml:"wait"`
	FlagVal any             `yaml:"flag_val,omitempty"`
}

type PotionBuff struct {
	Stat         string
	BonusPercent int
	TicksLeft    int
}

func (p *Player) ClearMoveState() {
	p.MoveTicks = 0
	p.MoveDirection = ""
	p.MoveTarget = 0
	p.MovePendingTrigger = nil
	p.MoveUsesEnergy = false
	p.ClearEscape()
}

func (p *Player) ClearEscape() {
	p.EscapeDir = ""
	p.EscapeTarget = 0
	p.EscapeTrigger = nil
	p.EscapeIsWalk = false
}

func (p *Player) OptionBool(name string) bool {
	def := GetOptionDef(name)
	if def == nil || def.Type != OptBool {
		return false
	}
	if p.Options == nil {
		return def.Default.(bool)
	}
	val, ok := p.Options[name]
	if !ok {
		return def.Default.(bool)
	}
	b, ok := val.(bool)
	if !ok {
		return def.Default.(bool)
	}
	return b
}

func (p *Player) OptionString(name string) string {
	def := GetOptionDef(name)
	if def == nil || def.Type != OptString {
		return ""
	}
	if p.Options == nil {
		return def.Default.(string)
	}
	val, ok := p.Options[name]
	if !ok {
		return def.Default.(string)
	}
	s, ok := val.(string)
	if !ok {
		return def.Default.(string)
	}
	return s
}

func (p *Player) OptionInt(name string) int {
	def := GetOptionDef(name)
	if def == nil || def.Type != OptInt {
		return 0
	}
	if p.Options == nil {
		return def.Default.(int)
	}
	val, ok := p.Options[name]
	if !ok {
		return def.Default.(int)
	}
	switch v := val.(type) {
	case int:
		return v
	case int64:
		return int(v)
	case float64:
		return int(v)
	}
	return def.Default.(int)
}

func (p *Player) EnsureFlags() {
	if p.Flags == nil {
		p.Flags = make(map[string]any)
	}
}

func (p *Player) InvSlot(i int) *InventorySlot {
	if p.Inventory == nil {
		return nil
	}
	return p.Inventory[i]
}

func (p *Player) SetInvSlot(i int, slot *InventorySlot) {
	if p.Inventory == nil {
		p.Inventory = make(map[int]*InventorySlot)
	}
	if slot == nil {
		delete(p.Inventory, i)
	} else {
		p.Inventory[i] = slot
	}
}

func (p *Player) FirstFreeSlot() int {
	for i := 0; i < 28; i++ {
		if p.Inventory[i] == nil {
			return i
		}
	}
	return -1
}

func (p *Player) FreeSlots() int {
	used := len(p.Inventory)
	return 28 - used
}

func New(name string) *Player {
	p := &Player{
		Name:        name,
		Skills:      make(map[SkillName]int),
		Bank:        make(map[int]*InventorySlot),
		Equipment:   make(map[item.EquipSlot]string),
		AttackStyle: Accurate,
		Prompt:      "> ",
		RoomID:      0,
		MapSymbols:  make(map[int]MapSymbolData),
		Stats: PlayerStats{
			MobKills: make(map[string]int),
		},
	}
	for _, s := range AllSkills {
		p.Skills[s] = 0
	}
	p.Skills[Hitpoints] = XPForLevel(10)
	p.HP = p.MaxHP()
	p.Battery = p.MaxBattery()
	p.RunEnergy = p.MaxRunEnergy()
	return p
}

func (p *Player) Level(s SkillName) int {
	return LevelForXP(p.Skills[s])
}

func (p *Player) AddXP(s SkillName, amount int) {
	if p.Skills == nil {
		p.Skills = make(map[SkillName]int)
	}
	p.Skills[s] += amount
}

func (p *Player) AddSkillXP(s SkillName, amount int) int {
	oldLevel := p.Level(s)
	p.AddXP(s, amount)
	newLevel := p.Level(s)
	if newLevel > oldLevel {
		return newLevel
	}
	return 0
}

func (p *Player) TotalLevel() int {
	total := 0
	for _, s := range AllSkills {
		total += p.Level(s)
	}
	return total
}

func (p *Player) CombatLevel() int {
	base := 0.25 * float64(p.Level(Defense)+p.Level(Hitpoints)+p.Level(Technology))
	att := float64(p.Level(Accuracy))
	str := float64(p.Level(Strength))

	if float64(p.Level(Ranged))*1.5 > att+str {
		base += 0.375 * float64(p.Level(Ranged))
	} else {
		base += 0.25 * (att + str)
	}

	base += 0.125 * float64(p.Level(Science))
	return int(base)
}

func (p *Player) MaxHP() int {
	return p.Level(Hitpoints)
}

const RegenTickInterval = 100

func (p *Player) StartRegen() {
	if p.RegenerateTick == 0 {
		p.RegenerateTick = RegenTickInterval
	}
}

func (p *Player) HasItem(itemID string) bool {
	for _, slot := range p.Inventory {
		if slot != nil && slot.ItemID == itemID && slot.Quantity > 0 {
			return true
		}
	}
	return false
}

// IsWielding reports whether the given item is currently held in one of the
// player's weapon-hand equipment slots (main_hand or off_hand). It is the
// "wielding" predicate used to gate on_kill interactions whose item_id names
// a specific weapon — two-handed weapons occupy main_hand alone, while dual
// wield / weapon + shield uses both hands. Armor, ammo, ring, and tool slots
// do NOT count as "wielding".
func (p *Player) IsWielding(itemID string) bool {
	if itemID == "" {
		return false
	}
	return p.Equipment[item.SlotMainHand] == itemID || p.Equipment[item.SlotOffHand] == itemID
}

func (p *Player) CountItem(itemID string) int {
	count := 0
	for _, slot := range p.Inventory {
		if slot != nil && slot.ItemID == itemID {
			count += slot.Quantity
		}
	}
	return count
}

func (p *Player) RemoveItem(itemID string, qty int) bool {
	remaining := qty
	for i, slot := range p.Inventory {
		if slot == nil || slot.ItemID != itemID {
			continue
		}
		if slot.Quantity <= remaining {
			remaining -= slot.Quantity
			delete(p.Inventory, i)
		} else {
			slot.Quantity -= remaining
			remaining = 0
		}
		if remaining <= 0 {
			return true
		}
	}
	return remaining <= 0
}

func (p *Player) MaxBattery() float64 {
	return float64(p.Level(Technology))
}

// MaxRunEnergy is 3x the player's Agility level (the OSRS-inspired cap).
func (p *Player) MaxRunEnergy() int {
	return 3 * p.Level(Agility)
}

func (p *Player) HasRunEnergy() bool {
	return p.RunEnergy > 0
}

// ClampRunEnergy caps current run energy to the player's current maximum.
// Called whenever the Agility level can change (XP gains) since leveling up
// raises the cap but should not auto-refill the missing energy.
func (p *Player) ClampRunEnergy() {
	max := p.MaxRunEnergy()
	if p.RunEnergy > max {
		p.RunEnergy = max
	}
}

func (p *Player) HasActiveTech(techID string) bool {
	if p.ActiveTechs == nil {
		return false
	}
	return p.ActiveTechs[techID]
}

func (p *Player) ActivateTech(techID string) {
	if p.ActiveTechs == nil {
		p.ActiveTechs = make(map[string]bool)
	}
	if p.TechActivatedSinceTick == nil {
		p.TechActivatedSinceTick = make(map[string]bool)
	}
	p.ActiveTechs[techID] = true
	p.TechActivatedSinceTick[techID] = true
}

func (p *Player) DeactivateTech(techID string) {
	if p.ActiveTechs != nil {
		delete(p.ActiveTechs, techID)
	}
}

func (p *Player) DeactivateAllTechs() {
	p.ActiveTechs = nil
	p.TechActivatedSinceTick = nil
}

func (p *Player) BankSlot(i int) *InventorySlot {
	if p.Bank == nil {
		return nil
	}
	return p.Bank[i]
}

func (p *Player) SetBankSlot(i int, slot *InventorySlot) {
	if p.Bank == nil {
		p.Bank = make(map[int]*InventorySlot)
	}
	if slot == nil {
		delete(p.Bank, i)
	} else {
		p.Bank[i] = slot
	}
}

func (p *Player) NextBankSlot() int {
	if p.Bank == nil {
		return 0
	}
	i := 0
	for {
		if p.Bank[i] == nil {
			return i
		}
		i++
	}
}

func (p *Player) BankSlots() []int {
	if p.Bank == nil {
		return nil
	}
	keys := make([]int, 0, len(p.Bank))
	for k := range p.Bank {
		keys = append(keys, k)
	}
	sort.Ints(keys)
	return keys
}

func (p *Player) BankCount() int {
	return len(p.Bank)
}

func (p *Player) ActiveTechList() []string {
	var result []string
	for id := range p.ActiveTechs {
		result = append(result, id)
	}
	sort.Strings(result)
	return result
}