import * as utils from './utils'
import Point from './point'
import Path from './path'
import Snippet from './snippet'
import Attributes from './attributes'
import Hooks from './hooks'

function Part() {
  this.attributes = new Attributes()
  this.points = {}
  this.paths = {}
  this.snippets = {}
  this.freeId = 0
  this.topLeft = false
  this.bottomRight = false
  this.width = false
  this.height = false
  this.render = true
  this.utils = utils

  // Constructors so macros can create objects
  this.Point = Point
  this.Path = Path
  this.Snippet = Snippet

  this.hooks = new Hooks() // Hooks container

  return this
}

Part.prototype.macroClosure = function (args) {
  let self = this
  let method = function (key, args) {
    let macro = utils.macroName(key)
    if (typeof self[macro] === 'function') self[macro](args)
  }

  return method
}

Part.prototype.runHooks = function (hookName, data = false) {
  if (data === false) data = this
  let hooks = this.hooks[hookName]
  if (hooks && hooks.length > 0) {
    for (let hook of hooks) {
      hook.method(data, hook.data)
    }
  }
}

/** Returns an unused ID */
Part.prototype.getId = function () {
  this.freeId += 1

  return '' + this.freeId
}

/** Returns a value formatted for units provided in settings */
Part.prototype.unitsClosure = function (value) {
  let self = this
  let method = function (value) {
    return utils.units(value, self.context.settings.units)
  }

  return method
}

/** Calculates the part's bounding box and sets it */
Part.prototype.boundary = function () {
  if (this.topLeft) return this // Cached

  let topLeft = new Point(Infinity, Infinity)
  let bottomRight = new Point(-Infinity, -Infinity)
  for (let key in this.paths) {
    let path = this.paths[key].boundary()
    if (path.render) {
      if (path.topLeft.x < topLeft.x) topLeft.x = path.topLeft.x
      if (path.topLeft.y < topLeft.y) topLeft.y = path.topLeft.y
      if (path.bottomRight.x > bottomRight.x) bottomRight.x = path.bottomRight.x
      if (path.bottomRight.y > bottomRight.y) bottomRight.y = path.bottomRight.y
    }
  }
  for (let key in this.points) {
    let point = this.points[key]
    let radius = point.attributes.get('data-circle')
    if (radius) {
      radius = parseFloat(radius)
      if (point.x - radius < topLeft.x) topLeft.x = point.x - radius
      if (point.y - radius < topLeft.y) topLeft.y = point.y - radius
      if (point.x + radius > bottomRight.x) bottomRight.x = point.x + radius
      if (point.y + radius > bottomRight.y) bottomRight.y = point.y + radius
    }
  }
  // Fix infinity if part has no paths
  if (topLeft.x === Infinity) topLeft.x = 0
  if (topLeft.y === Infinity) topLeft.y = 0
  if (bottomRight.x === -Infinity) bottomRight.x = 0
  if (bottomRight.y === -Infinity) bottomRight.y = 0
  // Add margin
  let margin = this.context.settings.margin
  if (this.context.settings.paperless && margin < 10) margin = 10
  this.topLeft = new Point(topLeft.x - margin, topLeft.y - margin)
  this.bottomRight = new Point(bottomRight.x + margin, bottomRight.y + margin)
  this.width = this.bottomRight.x - this.topLeft.x
  this.height = this.bottomRight.y - this.topLeft.y

  return this
}

/** Stacks part so that its top left corner is in (0,0) */
Part.prototype.stack = function () {
  if (this.topLeft !== false) return this
  else this.boundary()
  if (this.topLeft.x == 0 && this.topLeft.y == 0) return this
  else this.attr('transform', `translate(${this.topLeft.x * -1}, ${this.topLeft.y * -1})`)

  return this
}

/** Adds an attribute. This is here to make this call chainable in assignment */
Part.prototype.attr = function (name, value, overwrite = false) {
  if (overwrite) this.attributes.set(name, value)
  else this.attributes.add(name, value)

  return this
}

/** Copies point/path/snippet data from part orig into this */
Part.prototype.inject = function (orig) {
  const findBasePoint = (p) => {
    for (let i in orig.points) {
      if (orig.points[i] === p) return i
    }

    return false
  }

  for (let i in orig.points) this.points[i] = orig.points[i].clone()
  for (let i in orig.paths) {
    this.paths[i] = orig.paths[i].clone()
    // Keep link between points and path ops where possible
    for (let j in orig.paths[i].ops) {
      let op = orig.paths[i].ops[j]
      if (op.type !== 'close') {
        let toPoint = findBasePoint(op.to)
        if (toPoint) this.paths[i].ops[j].to = this.points[toPoint]
      }
      if (op.type === 'curve') {
        let cp1Point = findBasePoint(op.cp1)
        if (cp1Point) this.paths[i].ops[j].cp1 = this.points[cp1Point]
        let cp2Point = findBasePoint(op.cp2)
        if (cp2Point) this.paths[i].ops[j].cp2 = this.points[cp2Point]
      }
    }
  }
  for (let i in orig.snippets) {
    this.snippets[i] = orig.snippets[i].clone()
  }

  return this
}

Part.prototype.units = function (input) {
  return utils.units(input, this.context.settings.units)
}

/** Returns an object with shorthand access for pattern design */
Part.prototype.shorthand = function () {
  let complete = this.context.settings.complete ? true : false
  let paperless = this.context.settings.paperless === true ? true : false
  let sa = this.context.settings.complete ? this.context.settings.sa || 0 : 0
  return {
    sa,
    measurements: this.context.settings.measurements || {},
    options: this.context.settings.options || {},
    store: this.context.store,
    points: this.points || {},
    paths: this.paths || {},
    snippets: this.snippets || {},
    macro: this.macroClosure(),
    units: this.unitsClosure(),
    utils: utils,
    Point: this.Point,
    Path: this.Path,
    Snippet: this.Snippet,
    complete,
    paperless,
    events: this.context.events,
    raise: this.context.events.raise
  }
}

export default Part