_ = require 'lodash'

items = module.exports.items =
  weapon: [
    {index: 0, text: "Training Sword", classes: "weapon_0", notes:'Training weapon.', strength: 0, value:0}
    {index: 1, text: "Sword", classes:'weapon_1', notes:'Increases experience gain by 3%.', strength: 3, value:20}
    {index: 2, text: "Axe", classes:'weapon_2', notes:'Increases experience gain by 6%.', strength: 6, value:30}
    {index: 3, text: "Morningstar", classes:'weapon_3', notes:'Increases experience gain by 9%.', strength: 9, value:45}
    {index: 4, text: "Blue Sword", classes:'weapon_4', notes:'Increases experience gain by 12%.', strength: 12, value:65}
    {index: 5, text: "Red Sword", classes:'weapon_5', notes:'Increases experience gain by 15%.', strength: 15, value:90}
    {index: 6, text: "Golden Sword", classes:'weapon_6', notes:'Increases experience gain by 18%.', strength: 18, value:120}
    {index: 7, text: "Dark Souls Blade", classes:'weapon_7', notes:'Increases experience gain by 21%.', strength: 21, value:150, canOwn: ((u)-> +u.backer?.tier >= 70)}
    {index: 8, text: "Crystal Blade", classes:'weapon_8', notes:'Increases experience gain by 24%.', strength: 24, value:170, canOwn: ((u)-> +u.contributor?.level >= 4)}
  ]
  armor: [
    {index: 0, text: "Cloth Armor", classes: 'armor_0', notes:'Training armor.', defense: 0, value:0}
    {index: 1, text: "Leather Armor", classes: 'armor_1', notes:'Decreases Health loss by 4%.', defense: 4, value:30}
    {index: 2, text: "Chain Mail", classes: 'armor_2', notes:'Decreases Health loss by 6%.', defense: 6, value:45}
    {index: 3, text: "Plate Mail", classes: 'armor_3', notes:'Decreases Health loss by 7%.', defense: 7, value:65}
    {index: 4, text: "Red Armor", classes: 'armor_4', notes:'Decreases Health loss by 8%.', defense: 8, value:90}
    {index: 5, text: "Golden Armor", classes: 'armor_5', notes:'Decreases Health loss by 10%.', defense: 10, value:120}
    {index: 6, text: "Shade Armor", classes: 'armor_6', notes:'Decreases Health loss by 12%.', defense: 12, value:150, canOwn: ((u)-> +u.backer?.tier >= 45)}
    {index: 7, text: "Crystal Armor", classes: 'armor_7', notes:'Decreases Health loss by 14%.', defense: 14, value:170, canOwn: ((u)-> +u.contributor?.level >= 2)}
  ]
  head: [
    {index: 0, text: "No Helm", classes: 'head_0', notes:'Training helm.', defense: 0, value:0}
    {index: 1, text: "Leather Helm", classes: 'head_1', notes:'Decreases Health loss by 2%.', defense: 2, value:15}
    {index: 2, text: "Chain Coif", classes: 'head_2', notes:'Decreases Health loss by 3%.', defense: 3, value:25}
    {index: 3, text: "Plate Helm", classes: 'head_3', notes:'Decreases Health loss by 4%.', defense: 4, value:45}
    {index: 4, text: "Red Helm", classes: 'head_4', notes:'Decreases Health loss by 5%.', defense: 5, value:60}
    {index: 5, text: "Golden Helm", classes: 'head_5', notes:'Decreases Health loss by 6%.', defense: 6, value:80}
    {index: 6, text: "Shade Helm", classes: 'head_6', notes:'Decreases Health loss by 7%.', defense: 7, value:100, canOwn: ((u)-> +u.backer?.tier >= 45)}
    {index: 7, text: "Crystal Helm", classes: 'head_7', notes:'Decreases Health loss by 8%.', defense: 8, value:120, canOwn: ((u)-> +u.contributor?.level >= 3)}
  ]
  shield: [
    {index: 0, text: "No Shield", classes: 'shield_0', notes:'No Shield.', defense: 0, value:0}
    {index: 1, text: "Wooden Shield", classes: 'shield_1', notes:'Decreases Health loss by 3%', defense: 3, value:20}
    {index: 2, text: "Buckler", classes: 'shield_2', notes:'Decreases Health loss by 4%.', defense: 4, value:35}
    {index: 3, text: "Reinforced Shield", classes: 'shield_3', notes:'Decreases Health loss by 5%.', defense: 5, value:55}
    {index: 4, text: "Red Shield", classes: 'shield_4', notes:'Decreases Health loss by 7%.', defense: 7, value:70}
    {index: 5, text: "Golden Shield", classes: 'shield_5', notes:'Decreases Health loss by 8%.', defense: 8, value:90}
    {index: 6, text: "Tormented Skull", classes: 'shield_6', notes:'Decreases Health loss by 9%.', defense: 9, value:120, canOwn: ((u)-> +u.backer?.tier >= 45)}
    {index: 7, text: "Crystal Shield", classes: 'shield_7', notes:'Decreases Health loss by 10%.', defense: 10, value:150, canOwn: ((u)-> +u.contributor?.level >= 5)}
  ]

  potion:
    type: 'potion', text: "Health Potion", notes: "Recover 15 Health (Instant Use)", value: 25, classes: 'potion'
  reroll:
    type: 'reroll', text: "Re-Roll", classes: 'reroll', notes: "Resets your task values back to 0 (yellow). Useful when everything's red and it's hard to stay alive.", value:0

  ###
  Spell definitions. Text, notes, and mana are obvious. The rest:

  * {target}: one of [task, self, party, user]. This is very important, because if the cast() function is expecting one
    thing and receives another, it will cause errors. `self` is used for self buffs, multi-task debuffs, AOEs (eg, meteor-shower),
    etc. Basically, use self for anything that's not [task, party, user] and is an instant-cast

  * {cast}: the fucntion that's run to perform the ability's action. This is pretty slick - because this is exported to the
    web, this function can be performed on the client and on the server. `user` param is self (needed for determining your
    own stats for effectiveness of cast), and `target` param is one of [task, party, user]. In the case of `self` spells,
    you act on `user` instead of `target`. You can trust these are the correct objects, as long as the `target` attr of the
    spell is correct. Take a look at habitrpg/src/models/user.js and habitrpg/src/models/task.js for what attributes are
    available on each model. Note `task.value` is its "redness". If party is passed in, it's an array of users,
    so you'll want to iterate over them like: `_.each(target,function(member){...})`

  Note, user.stats.mp is docked after automatically (it's appended to functions automatically down below in an _.each)
  ###
  spells:
    wizard:
      fireball:
        text: 'Fireball'
        mana: 10
        target: 'task'
        notes: 'Burns a task, granting additional exp & decreasing its redness.'
        cast: (user, target) ->
          target.value += user.stats.int * crit(user)
      ice:
        text: 'Ice Wall'
        mana: 25
        target: 'task'
        notes: 'Freezes all tasks, slowing the damage they deal you for one day'
        cast: (user, target) ->
          _.each user.tasks, (task) ->
            task.buffs.value ?= task.value
            task.buffs.value += user.stats.int
      meteorShower:
        text: 'Meteor Shower'
        mana: 40
        target: 'self'
        notes: "Causes damage to all tasks, reducing their redness",
        cast: (user, target) ->
          _.each user.tasks, ((task) ->task.value += user.stats.int)

    warrior:
      bash:
        text: 'Bash'
        mana: 10
        target: 'task'
        notes: 'Hit a single task hard'
        cast: (user, target) ->
          target.value += user.stats.str * crit(user)
      intimidate:
        text: 'Intimidate'
        mana: 10
        target: 'task'
        notes: "Intimidate a task, making it flee"
        cast: (user, target) ->
          (target.buffs ?= {}).value = 9999
      defensiveStance:
        text: 'Defensive Stance'
        target: 'self'
        mana: 10
        notes: 'Prepare yourself for the onslaught of tasks'
        cast: (user, target) ->
          user.stats.buffs.def = user.stats.def

    rogue:
      backStab:
        text: 'Back Stab'
        mana: 10
        target: 'task'
        notes: 'High crit chance, stab a habit from behind'
        cast: (user, target) ->
          _crit = crit(user)
          target.value += _crit
          user.stats.gp += _crit
      pickPocket:
        text: 'Pick Pocket'
        target: 'task'
        mana: 10
        notes: 'High chance of getting a free drop from a task'
        cast: (user, target) ->
          user.stats.gp += target.value * user.stats.per
      stealth:
        text: 'Stealth'
        target: 'self'
        mana: 40
        notes: 'Hide from as many tasks as you can for one day'
        cast: (user, target) ->
          user.stats.buffs.stealth = user.stats.per # number of tasks you'll evade
    healer:
      heal:
        text: 'Heal'
        mana: 10
        target: 'user'
        notes: 'Heals self (user.hp += user.def, INT decreases mana cost)'
        cast: (user, target) ->
          target.stats.hp += user.stats.def
      healAll:
        text: 'Heal All'
        mana: 20
        target: 'party'
        notes: 'Heals party (user.hp += user.def, INT decreases mana cost)'
        cast: (user, target) ->
          _.each target, ((member) -> member.stats.hp += user.def)
      empower:
        text: 'Empower'
        mana: 20
        target: 'user'
        notes: "Increases target's highest stat"
        cast: (user, target) ->
          # TODO find highst stat, not just str
          highestStat = 'str'
          (target.stats.buffs ?= {})[highestStat] += (user.def/2)
      shield:
        text: 'Shield'
        mana: 20
        target: 'user'
        notes: "Increases target's defense for one day"
        cast: (user, target) ->
          (target.stats.buffs ?= {}).def += user.def

  eggs:
    # value & other defaults set below
    Wolf:             text: 'Wolf', adjective: 'loyal'
    TigerCub:         text: 'Tiger Cub', mountText: 'Tiger', adjective: 'fierce'
    PandaCub:         text: 'Panda Cub', mountText: 'Panda', adjective: 'gentle'
    LionCub:          text: 'Lion Cub',  mountText: 'Lion', adjective: 'regal'
    Fox:              text: 'Fox', adjective: 'wily'
    FlyingPig:        text: 'Flying Pig', adjective: 'whimsical'
    Dragon:           text: 'Dragon', adjective: 'mighty'
    Cactus:           text: 'Cactus', adjective: 'prickly'
    BearCub:          text: 'Bear Cub',  mountText: 'Bear', adjective: 'cuddly'
    #{text: 'Polar Bear Cub', name: 'PolarBearCub', value: 3}

  hatchingPotions:
    Base:             value: 2, text: 'Base'
    White:            value: 2, text: 'White'
    Desert:           value: 2, text: 'Desert'
    Red:              value: 3, text: 'Red'
    Shade:            value: 3, text: 'Shade'
    Skeleton:         value: 3, text: 'Skeleton'
    Zombie:           value: 4, text: 'Zombie'
    CottonCandyPink:  value: 4, text: 'Cotton Candy Pink'
    CottonCandyBlue:  value: 4, text: 'Cotton Candy Blue'
    Golden:           value: 5, text: 'Golden'

  food:
    Meat:             text: 'Meat', target: 'Base'
    Milk:             text: 'Milk', target: 'White'
    Potatoe:          text: 'Potato', target: 'Desert'
    Strawberry:       text: 'Strawberry', target: 'Red'
    Chocolate:        text: 'Chocolate', target: 'Shade'
    Fish:             text: 'Fish', target: 'Skeleton'
    RottenMeat:       text: 'Rotten Meat', target: 'Zombie'
    CottonCandyPink:  text: 'Pink Cotton Candy', target: 'CottonCandyPink'
    CottonCandyBlue:  text: 'Blue Cotton Candy', target: 'CottonCandyBlue'
    Honey:            text: 'Honey', target: 'Golden'
    # FIXME what to do with these extra items? Should we add "targets" (plural) for food instead of singular, so we don't have awkward extras?
    #Cheese:           text: 'Cheese', target: 'Golden'
    #Watermelon:       text: 'Watermelon', target: 'Golden'
    #SeaWeed:          text: 'SeaWeed', target: 'Golden'

    Saddle:           text: 'Saddle', value: 5, notes: 'Instantly raises your pet into a mount.'

crit = (user) -> (Math.random() * user.stats.per + 1)

# we sometimes want item arrays above in reverse order, for backward lookups (you'll see later in the code)
reversed = {}
_.each ['weapon', 'armor', 'head', 'shield'], (type) ->
  reversed[type] = items[type].slice().reverse()
  # add "type" to each item, so we can reference that as "weapon" or "armor" in the html
  # Also add canOwn(), which we use when comparing if user is a backer or contributor - but defaulted to `return true`
  _.each items[type], (item) -> _.defaults(item, {type, canOwn: ->true})

_.each items.eggs, (egg,k) ->
  _.defaults egg,
    value: 3
    name: k
    notes: "Find a hatching potion to pour on this egg, and it will hatch into a #{egg.adjective} #{egg.text}."
    mountText: egg.text

_.each items.hatchingPotions, (pot,k) ->
  _.defaults pot, {name: k, value: 2, notes: "Pour this on an egg, and it will hatch as a #{pot.text} pet."}

_.each items.food, (food,k) ->
  _.defaults food, {value: 1, name: k, notes: "Feed this to a pet and it may grow into a sturdy steed."}

# Intercept all spells to reduce user.stats.mp after casting the spell
_.each items.spells, (spellClass) ->
  _.each spellClass, (spell, k) ->
    spell.name = k
    _cast = spell.cast
    spell.cast = (user, target) ->
      #return if spell.target and spell.target != (if target.type then 'task' else 'user')
      _cast(user,target)
      user.stats.mp = user.stats.mp - spell.mana

module.exports.buyItem = (user, type) ->
  nextItem =
    if type is 'potion' then items.potion
    else _.find items[type].slice(~~user.items[type] + 1), ((i) -> i.canOwn user)

  return false if +user.stats.gp < +nextItem.value
  if nextItem.type is 'potion'
    user.stats.hp += 15;
    user.stats.hp = 50 if user.stats.hp > 50
  else
    user.items[type] = ~~nextItem.index
    if +user.items.weapon >= 6 and +user.items.armor >= 5 and +user.items.head >= 5 and +user.items.shield >= 5
      user.achievements.ultimateGear = true;
  user.stats.gp -= +nextItem.value
  true

###
  update store
###
module.exports.updateStore = (user) ->
  changes = {}
  _.each ['weapon', 'armor', 'shield', 'head'], (type) ->
    # Find the first item that fits the "next" bill, from between current item and end of the list
    curr = user.items?[type] or 0
    changes[type] = _.find(items[type].slice(curr+1), ((item) -> item.canOwn user)) or {hide:true}
  changes.potion = items.potion
  changes.reroll =  items.reroll
  changes

###
  Gets an item, and caps max to the last item in its array
###
module.exports.getItem = (type, index=0) ->
  # if they set their gear manually to something over what they can own, just set to 0 to avoid errors
  i = if (~~index > items[type].length - 1) then 0 else ~~index
  items[type][i]

###
  User's currently equiped item
  TODO this function is ugly, find a more elegant solution
###
module.exports.equipped = (type, item=0, pref={gender:'m', armorSet:'v1'}, backer={}, contributor={}) ->
  lastStandardItem = items[type].length - 3 # -1 for 0-based index, -2 for backer + contrib
  if (item > lastStandardItem) and !items[type][item]?.canOwn({backer,contributor})
    # They entered a # above what's legal in the restore dialog, find first legit item. (we should do checking on the restore-save instead)
    item = _.find(reversed[type], ((i) -> i.canOwn({backer, contributor}))).index

  # backer / contrib (they don't have gender)
  return "#{type}_#{item}" if (item > lastStandardItem)

#  # Females have some special thing going on for their armor / helms
#  if (type in ['armor', 'head'] and pref.gender is 'f')
#    return "f_armor_#{item}_#{pref.armorSet}" if (item is 0 and type is 'armor')
#    return "f_head_#{item}_#{pref.armorSet}" if (item > 1 and type is 'head')
#
#  return "#{pref.gender}_#{type}_#{item}"
  return "m_#{type}_#{item}"