import { Damage, DamageType, Actionable, Action, Vigor, DamageInstance, DamageFormula, ConstantDamageFormula, StatusEffect } from '@/game/combat'
import { LogLines, LogEntry, LogLine, nilLog, RandomEntry, FormatEntry, FormatOpt } from '@/game/interface'
import { Noun, ImproperNoun, Verb, RandomWord, Word, Preposition, ToBe, Adjective } from '@/game/language'
import { RubAction, DevourAction, ReleaseAction, StruggleAction, TransferAction, StruggleMoveAction } from '@/game/combat/actions'
import * as Words from '@/game/words'
import * as Onomatopoeia from '@/game/onomatopoeia'
import { Creature } from '@/game/creature'
import { VoreRelay } from '@/game/events'

export enum VoreType {
  Oral = "Oral Vore"
}

export const anyVore = new Set([
  VoreType.Oral
])

export type Wall = {
  name: Word;
  texture: Adjective;
  material: Noun;
  color: Adjective;
}

export type Fluid = {
  name: Word;
  color: Adjective;
  sound: Word;
  sloshVerb: Verb;
}

export type Gas = {
  name: Word;
  color: Adjective;
  smell: Adjective;
  bubbleVerb: Verb;
  releaseVerb: Verb;
  exit: Noun;
}

export enum ContainerCapability {
  Consume,
  Release,
  Digest,
  Absorb
}

export enum ConnectionDirection {
  Deeper,
  Neutral,
  Shallower
}

export type Connection = {
  destination: Container;
  direction: ConnectionDirection;
  description: (to: Container, from: Container, prey: Creature) => LogEntry;
}

export interface Container extends Actionable {
  name: Noun;
  owner: Creature;
  voreTypes: Set<VoreType>;
  capabilities: Set<ContainerCapability>;

  connections: Array<Connection>;

  effects: Array<StatusEffect>;

  wall: Wall | null;
  fluid: Fluid | null;
  gas: Gas | null;

  voreRelay: VoreRelay;

  contents: Array<Creature>;
  digested: Array<Creature>;

  damage: DamageFormula;

  sound: Word;

  capacity: number;
  fullness: number;

  consumeVerb: Verb;
  consumePreposition: Preposition;
  releaseVerb: Verb;
  releasePreposition: Preposition;
  struggleVerb: Verb;
  strugglePreposition: Preposition;

  canTake (prey: Creature): boolean;

  consume (prey: Creature): LogEntry;
  release (prey: Creature): LogEntry;

  enter (prey: Creature): LogEntry;
  exit (prey: Creature): LogEntry;

  struggle (prey: Creature): LogEntry;

  tick (dt: number, victims?: Array<Creature>): LogEntry;
  digest (preys: Creature[]): LogEntry;
  absorb (preys: Creature[]): LogEntry;

  onDigest (prey: Creature): LogEntry;
  onAbsorb (prey: Creature): LogEntry;

  consumeLine (user: Creature, target: Creature): LogEntry;
  statusLine (user: Creature, target: Creature): LogEntry;

  describe (): LogEntry;
  describeDetail (prey: Creature): LogEntry;

  connect (dest: Connection): void;
}

export abstract class DefaultContainer implements Container {
  public name: Noun
  contents: Array<Creature> = []
  actions: Array<Action> = []

  wall: Wall | null = null
  fluid: Fluid | null = null
  gas: Gas | null = null

  connections: Array<Connection> = []

  voreRelay = new VoreRelay()

  effects: Array<StatusEffect> = []

  consumeVerb = new Verb('devour')
  consumePreposition = new Preposition("into")
  releaseVerb = new Verb('release', 'releases', 'releasing', 'released')
  releasePreposition = new Preposition("out from")
  struggleVerb = new Verb('struggle', 'struggles', 'struggling', 'struggled')
  strugglePreposition = new Preposition("within")
  fluidColor = "#00ff0088"

  digested: Array<Creature> = []
  absorbed: Array<Creature> = []

  damage: DamageFormula = new ConstantDamageFormula(new Damage());

  sound = new Verb("slosh")

  constructor (name: Noun, public owner: Creature, public voreTypes: Set<VoreType>, public capacityFactor: number, public capabilities: Set<ContainerCapability>) {
    this.name = name.all
    if (capabilities.has(ContainerCapability.Consume)) {
      this.actions.push(new DevourAction(this))
    }
    if (capabilities.has(ContainerCapability.Release)) {
      this.actions.push(new ReleaseAction(this))
      this.actions.push(new StruggleAction(this))
    }
    if (capabilities.has(ContainerCapability.Digest)) {
      this.actions.push(new RubAction(this))
    }
  }

  connect (connection: Connection): void {
    this.connections.push(connection)

    this.actions.push(new TransferAction(this, connection))
    this.actions.push(new StruggleMoveAction(this, connection.destination))
  }

  get capacity (): number {
    return this.capacityFactor * this.owner.voreStats.Mass
  }

  statusLine (user: Creature, target: Creature): LogEntry {
    return new LogLine(
      `${target.name.capital} ${target.name.conjugate(new ToBe())} ${Words.Stuck} inside ${user.name.possessive} ${this.name}.`
    )
  }

  releaseLine (user: Creature, target: Creature): LogEntry {
    return new LogLine(`${user.name.capital} ${user.name.conjugate(this.releaseVerb)} ${target.name.objective} ${this.releasePreposition} ${user.pronouns.possessive} ${this.name}.`)
  }

  struggleLine (user: Creature, target: Creature): LogEntry {
    return new LogLine(`${user.name.capital} ${user.name.conjugate(this.struggleVerb)} ${this.strugglePreposition} ${target.name.possessive} ${this.name}.`)
  }

  get fullness (): number {
    return Array.from(this.contents.concat(this.digested, this.absorbed).values()).reduce((total: number, prey: Creature) => total + prey.voreStats.Bulk, 0)
  }

  canTake (prey: Creature): boolean {
    const fits = this.capacity - this.fullness >= prey.voreStats.Bulk

    const permitted = Array.from(this.voreTypes).every(voreType => {
      return prey.preyPrefs.has(voreType)
    })

    return fits && permitted
  }

  consume (prey: Creature): LogEntry {
    const results: Array<LogEntry> = [
      this.enter(prey),
      this.voreRelay.dispatch("onEaten", this, { prey: prey }),
      prey.voreRelay.dispatch("onEaten", this, { prey: prey }),
      this.consumeLine(this.owner, prey)
    ]

    this.owner.effects.forEach(effect => results.push(effect.postConsume(this.owner, prey, this)))

    return new LogLines(...results)
  }

  release (prey: Creature): LogEntry {
    const results = [
      this.exit(prey),
      this.releaseLine(this.owner, prey),
      this.voreRelay.dispatch("onReleased", this, { prey: prey }),
      prey.voreRelay.dispatch("onReleased", this, { prey: prey })
    ]

    return new LogLines(...results)
  }

  enter (prey: Creature): LogEntry {
    if (prey.containedIn !== null) {
      prey.containedIn.contents = prey.containedIn.contents.filter(item => prey !== item)
    }
    this.contents.push(prey)
    prey.containedIn = this

    const effectResults = this.effects.map(effect => prey.applyEffect(effect))

    const results = [
      this.voreRelay.dispatch("onEntered", this, { prey: prey }),
      prey.voreRelay.dispatch("onEntered", this, { prey: prey })
    ]

    this.owner.effects.forEach(effect => results.push(effect.postEnter(this.owner, prey, this)))

    return new LogLines(...results, ...effectResults)
  }

  exit (prey: Creature): LogEntry {
    prey.containedIn = this.owner.containedIn
    this.contents = this.contents.filter(victim => victim !== prey)

    if (this.owner.containedIn !== null) {
      this.owner.containedIn.contents.push(prey)
    }

    const effectResults = this.effects.map(effect => prey.removeEffect(effect))

    const results = [
      this.voreRelay.dispatch("onExited", this, { prey: prey }),
      prey.voreRelay.dispatch("onExited", this, { prey: prey })
    ]

    return new LogLines(...results, ...effectResults)
  }

  struggle (prey: Creature): LogEntry {
    return this.struggleLine(prey, this.owner)
  }

  describe (): LogEntry {
    const lines: Array<string> = []

    this.contents.forEach(prey => {
      lines.push(prey.toString())
    })

    return new LogLine(...lines)
  }

  describeDetail (prey: Creature): LogEntry {
    const lines: Array<LogLine> = []

    if (this.gas) {
      lines.push(
        new LogLine(`${this.gas.color.capital} ${this.gas.name.plural} ${this.gas.bubbleVerb} in ${this.owner.name.possessive} ${this.name}.`)
      )
    }
    if (this.fluid) {
      lines.push(
        new LogLine(`${this.fluid.name.capital} ${this.fluid.sloshVerb.singular} around ${prey.name.objective}.`)
      )
    }
    if (this.wall) {
      lines.push(
        new LogLine(`The ${this.wall.color} walls ${prey.name.conjugate(Words.Clench)} over ${prey.name.objective} like a vice.`)
      )
    }

    return new LogLine(...lines)
  }

  consumeLine (user: Creature, target: Creature) {
    return new RandomEntry(
      new LogLine(`${user.name.capital} ${user.name.conjugate(this.consumeVerb)} ${target.name.objective}, ${Words.Force.present} ${target.pronouns.objective} ${this.consumePreposition} ${user.pronouns.possessive} ${this.name}.`),
      new LogLine(`${user.name.capital} ${user.name.conjugate(new Verb("pounce"))} on ${target.name.objective} and ${user.name.conjugate(this.consumeVerb)} ${target.pronouns.objective}, ${Words.Force.present} ${target.pronouns.objective} ${this.consumePreposition} ${user.pronouns.possessive} ${this.name}.`)
    )
  }

  tickLine (user: Creature, target: Creature, args: { damage: Damage }): LogEntry {
    const options = [
      new LogLine(`${user.name.capital} ${Words.Churns.singular} ${target.name.objective} ${this.strugglePreposition} ${user.pronouns.possessive} ${this.name} for `, args.damage.renderShort(), `.`),
      new LogLine(`${user.name.capital.possessive} ${this.name} ${this.name.conjugate(Words.Churns)}, ${Words.Churns.present} ${target.name.objective} for `, args.damage.renderShort(), `.`),
      new LogLine(`${target.name.capital} ${target.name.conjugate(Words.Struggle)} ${this.strugglePreposition} ${user.name.possessive} ${Words.Slick} ${this.name} as it ${Words.Churns.singular} ${target.pronouns.objective} for `, args.damage.renderShort(), `.`)
    ]

    if (this.fluid) {
      options.push(new LogLine(`${this.fluid.name.capital} ${this.fluid.sloshVerb.singular} and ${this.fluid.sound.singular} as ${this.owner.name.possessive} ${this.name} steadily ${Words.Digest.singular} ${target.name.objective}.`))
    }

    const result: Array<LogEntry> = [
      new RandomEntry(...options)
    ]

    if (Math.random() < 0.3) {
      result.push(new FormatEntry(new LogLine(`${Onomatopoeia.Gurgle}`), FormatOpt.Onomatopoeia))
    }

    return new LogLines(...result)
  }

  digestLine (user: Creature, target: Creature): LogEntry {
    return new LogLine(`${user.name.capital.possessive} ${this.name} finishes ${Words.Digest.present} ${target.name.objective} down, ${target.pronouns.possessive} ${Words.Struggle.singular} fading away as ${target.pronouns.subjective} ${target.pronouns.conjugate(Words.Succumb)}.`)
  }

  absorbLine (user: Creature, target: Creature): LogEntry {
    return new LogLine(`${user.name.capital.possessive} ${this.name} ${this.name.conjugate(new Verb('finish', 'finishes'))} ${Words.Absorb.present} ${target.name.objective}, fully claiming ${target.pronouns.objective}.`)
  }

  tick (dt: number, victims?: Array<Creature>): LogEntry {
    const justDigested: Array<Creature> = []
    const justAbsorbed: Array<Creature> = []

    const damageResults: Array<LogEntry> = []

    const tickedEntryList: LogEntry[] = []

    if (this.capabilities.has(ContainerCapability.Digest)) {
      this.contents.forEach(prey => {
        if (victims === undefined || victims.indexOf(prey) >= 0) {
          const scaled = this.damage.calc(this.owner, prey).scale(dt / 60)
          const modified = this.owner.effects.reduce((damage, effect) => effect.modDigestionDamage(this.owner, prey, this, damage), scaled)
          if (modified.nonzero()) {
            tickedEntryList.push(this.tickLine(this.owner, prey, { damage: modified }))
            damageResults.push(prey.takeDamage(modified))
          }

          if (prey.vigors[Vigor.Health] <= 0) {
            prey.destroyed = true
            this.digested.push(prey)
            justDigested.push(prey)
            damageResults.push(this.onDigest(prey))
          }
        }
      })
    }

    const tickedEntries = new LogLines(...tickedEntryList)

    this.digested.forEach(prey => {
      if (victims === undefined || victims.indexOf(prey) >= 0) {
        const scaled = this.damage.calc(this.owner, prey).scale(dt / 60)
        const damageTotal: number = scaled.damages.filter(instance => instance.target === Vigor.Health).reduce(
          (total: number, instance: DamageInstance) => total + instance.amount,
          0
        )

        const massStolen = Math.min(damageTotal / 100, prey.voreStats.Mass)

        prey.voreStats.Mass -= massStolen
        this.owner.voreStats.Mass += massStolen

        if (prey.voreStats.Mass === 0) {
          this.absorbed.push(prey)
          justAbsorbed.push(prey)
          damageResults.push(this.onAbsorb(prey))
        }
      }
    })

    const digestedEntries = this.digest(justDigested)
    const absorbedEntries = this.absorb(justAbsorbed)

    this.contents = this.contents.filter(prey => {
      return prey.vigors[Vigor.Health] > 0
    })

    this.digested = this.digested.filter(prey => {
      return prey.voreStats.Mass > 0
    })

    return new LogLines(tickedEntries, new LogLines(...damageResults), digestedEntries, absorbedEntries)
  }

  absorb (preys: Creature[]): LogEntry {
    return new LogLines(...preys.map(prey => this.absorbLine(this.owner, prey)))
  }

  digest (preys: Creature[]): LogEntry {
    const results = preys.map(prey => this.digestLine(this.owner, prey))
    if (preys.length > 0 && this.gas) {
      results.push(new LogLine(
        `A crass ${this.gas.releaseVerb} escapes ${this.owner.name.possessive} ${this.gas.exit} as ${this.owner.name.possessive} prey is digested, spewing ${this.gas.color} ${this.gas.name}.`
      ))
    }
    return new LogLines(...results)
  }

  onAbsorb (prey: Creature): LogEntry {
    return this.voreRelay.dispatch("onAbsorbed", this, { prey: prey })
  }

  onDigest (prey: Creature): LogEntry {
    return this.voreRelay.dispatch("onDigested", this, { prey: prey })
  }
}

export class Stomach extends DefaultContainer {
  fluid = {
    color: new Adjective("green"),
    name: new Noun("chyme"),
    sound: new Verb("gurgle"),
    sloshVerb: new Verb("slosh", "sloshes", "sloshing", "sloshed")
  }

  gas = {
    bubbleVerb: new Verb("bubble", "bubbles", "bubbling", "bubbled"),
    color: new Adjective("hazy"),
    name: new Noun("fume", "fumes"),
    releaseVerb: new Verb("belch", "belches", "belching", "belched"),
    smell: new Adjective("acrid"),
    exit: new Noun("jaws")
  }

  wall = {
    color: new Adjective("red"),
    material: new Noun("muscle"),
    name: new Noun("wall"),
    texture: new Adjective("slimy")
  }

  constructor (owner: Creature, capacityFactor: number, damage: DamageFormula) {
    super(new Noun("stomach"), owner, new Set<VoreType>([VoreType.Oral]), capacityFactor, new Set<ContainerCapability>([
      ContainerCapability.Digest,
      ContainerCapability.Absorb
    ]))

    this.voreRelay.subscribe("onEntered", (sender: Container, args: { prey: Creature }) => {
      return new FormatEntry(new LogLine(`${Onomatopoeia.Glunk}`), FormatOpt.Onomatopoeia)
    })

    this.damage = damage
  }
}

export class Throat extends DefaultContainer {
  fluid = {
    color: new Adjective("clear"),
    name: new RandomWord([
      new Noun("saliva"),
      new Noun("drool"),
      new Noun("slobber")
    ]),
    sound: new Verb("squish", "squishes"),
    sloshVerb: new Verb("slosh", "sloshes", "sloshing", "sloshed")
  }

  wall = {
    color: new Adjective("red"),
    material: new Noun("muscle"),
    name: new Noun("wall"),
    texture: new Adjective("slimy")
  }

  constructor (owner: Creature, capacityFactor: number) {
    super(new Noun("throat"), owner, new Set<VoreType>([VoreType.Oral]), capacityFactor, new Set<ContainerCapability>([
      ContainerCapability.Consume,
      ContainerCapability.Release
    ]))

    this.voreRelay.subscribe("onEaten", (sender: Container, args: { prey: Creature }) => {
      return new FormatEntry(new LogLine(`${Onomatopoeia.Swallow}`), FormatOpt.Onomatopoeia)
    })
  }
}

export function transferDescription (verb: Word, preposition: Preposition): ((from: Container, to: Container, prey: Creature) => LogEntry) {
  return (from: Container, to: Container, prey: Creature) => {
    return new LogLine(`${from.owner.name.capital} ${from.owner.name.conjugate(verb.singular)} ${prey.name.objective} ${preposition} ${to.consumePreposition} ${from.owner.pronouns.possessive} ${to.name}.`)
  }
}