import { Stat, Vigor, StatDescs, VigorDescs, StatIcons, VigorIcons, VoreStat, VoreStatIcons, VoreStatDescs } from './combat'
import tippy from 'tippy.js'

/**
 * A LogEntry is something that can produce zero or more HTMLElements
 */
export interface LogEntry {
  render: () => HTMLElement[];
}

/**
 * Takes zero or more strings or [[LogEntry]] objects
 *
 * Produces a list of divs containing each string/object
 */
export class LogLines implements LogEntry {
  private parts: Array<string|LogEntry>

  constructor (...parts: Array<string|LogEntry>) {
    this.parts = parts
  }

  render (): HTMLElement[] {
    const div = document.createElement("div")

    this.parts.forEach(part => {
      if (typeof part === "string") {
        const partDiv = document.createElement("div")
        partDiv.innerText = part
        div.appendChild(partDiv)
      } else {
        (part as LogEntry).render().forEach(logPart => {
          const partDiv = document.createElement("div")
          partDiv.appendChild(logPart)
          div.appendChild(partDiv)
        })
      }
    })

    return [div]
  }
}

export enum FormatOpt {
  Damage = "log-damage",
  DamageInst = "damage-instance"
}

/**
 * Wraps its LogEntry up in a span with the specified class
 */
export class FormatEntry implements LogEntry {
  constructor (private entry: LogEntry, private opt: FormatOpt) {

  }

  render (): HTMLElement[] {
    const span = document.createElement("span")

    this.entry.render().forEach(elem => {
      span.appendChild(elem)
    })

    span.classList.add(this.opt)

    return [span]
  }
}

/**
 * Wraps a string up in a span with the specified class
 *
 * This will probably be folded into FormatEntry soon
 */
export class FormatText implements LogEntry {
  constructor (private opt: FormatOpt, private line: string) {

  }

  render (): HTMLElement[] {
    const span = document.createElement("span")
    span.innerText = this.line
    span.classList.add(this.opt)
    return [span]
  }
}

/**
 * Like [[LogLines]], but with spans instead of divs
 */
export class LogLine implements LogEntry {
  private parts: Array<string|LogEntry>

  constructor (...parts: Array<string|LogEntry>) {
    this.parts = parts
  }

  render (): HTMLElement[] {
    const div = document.createElement("span")

    this.parts.forEach(part => {
      if (typeof part === "string") {
        const partSpan = document.createElement("span")
        partSpan.innerText = part
        div.appendChild(partSpan)
      } else {
        (part as LogEntry).render().forEach(logPart => {
          div.appendChild(logPart)
        })
      }
    })

    return [div]
  }
}

export class Newline implements LogEntry {
  render (): HTMLElement[] {
    return [document.createElement("br")]
  }
}

/**
 * Produces a FontAwesome icon
 */
export class FAElem implements LogEntry {
  constructor (private name: string) {

  }

  render (): HTMLElement[] {
    const i = document.createElement("i")
    this.name.split(" ").map(cls => i.classList.add(cls))
    return [i]
  }
}

/**
 * Produces a representation of a creature's property, such as health or power
 *
 * Can be just the icon, or include a number as well
 *
 * A tooltip is attached to the symbol
 */
export class PropElem implements LogEntry {
  constructor (private prop: Stat | Vigor | VoreStat, private value: number|null = null) {

  }

  render (): HTMLElement[] {
    let cls: string

    if (this.prop in Stat) {
      cls = StatIcons[this.prop as Stat]
    } else if (this.prop in Vigor) {
      cls = VigorIcons[this.prop as Vigor]
    } else if (this.prop in Vigor) {
      cls = VoreStatIcons[this.prop as VoreStat]
    } else {
      // this shouldn't be possible, given the typing...
      cls = "fas fa-exclamation-triangle"
    }

    const span = document.createElement("span")
    span.classList.add("stat-entry")

    const tooltipTemplate = document.createElement("div")
    const tooltipTitle = document.createElement("div")
    tooltipTitle.classList.add("tooltip-title")
    const tooltipBody = document.createElement("div")
    tooltipBody.classList.add("tooltip-body")

    tooltipTemplate.appendChild(tooltipTitle)
    tooltipTemplate.appendChild(tooltipBody)

    tooltipTitle.textContent = this.prop

    if (this.prop in Stat) {
      tooltipBody.textContent = StatDescs[this.prop as Stat]
    } else if (this.prop in Vigor) {
      tooltipBody.textContent = VigorDescs[this.prop as Vigor]
    } else if (this.prop in VoreStat) {
      tooltipBody.textContent = VoreStatDescs[this.prop as VoreStat]
    }

    if (this.value !== null) {
      const numText = Math.round(this.value).toFixed(0) === this.value.toFixed(0) ? this.value.toFixed(0) : this.value.toFixed(1)
      span.textContent = numText + ' '
    }

    const icon = new FAElem(cls).render()[0]

    span.appendChild(icon)

    tippy(icon, {
      content: tooltipTemplate
    })
    return [span]
  }
}

/**
 * Produces an <img>
 */
export class ImgElem implements LogEntry {
  constructor (private url: string) {

  }

  render (): HTMLElement[] {
    const div = document.createElement("div")
    const img = document.createElement("img")
    img.src = this.url
    div.appendChild(img)
    return [div]
  }
}

/**
 * Directly concatenates zero or more [[LogEntry]] objects, without wrapping them in anything
 */
export class CompositeLog implements LogEntry {
  entries: LogEntry[]

  constructor (...entries: LogEntry[]) {
    this.entries = entries
  }

  render (): HTMLElement[] {
    return this.entries.flatMap(e => e.render())
  }
}