import { ctx } from './canvas'
import { randomi } from './utils'
import RES from './resource'

const offset = 50

// Objects

export class GameObject {
  constructor (x, y, w, h, img) {
    this.x = x
    this.y = y
    this.w = w
    this.h = h
    this.img = img
    this.physical = true
  }

  draw () {
    if (!this.physical) return
    if (this.img.indexOf('#') === 0) {
      ctx.fillStyle = this.img
      ctx.fillRect(ctx.oX + this.x, ctx.oY + this.y, this.w, this.h)
    } else {
      ctx.drawImage(RES.loadImage(this.img, true), ctx.oX + this.x, ctx.oY + this.y, this.w, this.h)
    }
  }

  destroy () {
    this.physical = false
  }

  get weight () {
    return 0.1
  }
}

export class Rock extends GameObject {
  constructor (x, y, size) {
    let o = size * 20
    super(x, y, o, o, 'static/rock_' + size + '.png')
    this.size = size
  }

  get weight () {
    return Math.min(0.20 * this.size, 1)
  }
}

export class Gold extends GameObject {
  constructor (x, y, size) {
    let o = size * 24
    super(x, y, o, o, 'static/gold_' + size + '.png')
    this.size = size
  }

  get weight () {
    return Math.min(0.25 * this.size, 1)
  }
}

export class Diamond extends GameObject {
  constructor (x, y) {
    super(x, y, 16, 16, 'static/diamond.png')
  }

  get weight () {
    return 0.11
  }
}

export class Lootbag extends GameObject {
  constructor (x, y) {
    super(x, y, 30, 30, 'static/loot.png')
  }

  get weight () {
    return 0.56
  }
}

// Level

export class Level {
  constructor (id, objects) {
    this.id = id
    this.objects = objects || []
  }

  draw () {
    for (let i in this.objects) {
      this.objects[i].draw()
    }
  }

  static create (index, my, width, height) {
    let objects = []
    let rocks = randomi(4, 12)
    let gold = randomi(4, 12)
    let diamond = randomi(0, 2)
    let loot = randomi(0, 2)

    // Add rocks
    for (let r = 0; r < rocks; r++) {
      let x = randomi(offset, width - offset)
      let y = randomi(offset + my, height - (offset + my))
      let size = randomi(1, 4)
      objects.push(new Rock(x, y, size))
    }

    // Add gold
    for (let r = 0; r < gold; r++) {
      let x = randomi(offset, width - offset)
      let y = randomi(offset + my, height - (offset + my))
      let size = randomi(1, 4)
      objects.push(new Gold(x, y, size))
    }

    // Add diamonds
    for (let r = 0; r < diamond; r++) {
      let x = randomi(offset, width - offset)
      let y = randomi(offset + my, height - (offset + my))
      objects.push(new Diamond(x, y))
    }

    // Add loot
    for (let r = 0; r < loot; r++) {
      let x = randomi(offset, width - offset)
      let y = randomi(offset + my, height - (offset + my))
      objects.push(new Lootbag(x, y))
    }

    let n = new Level(index, objects)
    return n
  }
}