/*
 * Grid
 *
 * Pico.css - https://picocss.com
 * Copyright 2019-2023 - Licensed under MIT
 */

const grid = {
  // Config
  buttons: {
    text: {
      add: "Add column",
      remove: "Remove column",
    },
    target: "#grid article",
  },
  grid: {
    current: 4,
    min: 1,
    max: 12,
    gridTarget: "#grid .grid",
    codeTarget: "#grid pre code",
  },

  // Init
  init() {
    this.addButtons()
    this.generateGrid()
  },

  // Add buttons
  addButtons() {
    // Insert buttons
    let buttons = document.createElement("P")
    buttons.innerHTML = `
      <button class="secondary add">
        <svg xmlns="http://www.w3.org/2000/svg" height="16px" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round">
          <line x1="12" y1="5" x2="12" y2="19"></line>
          <line x1="5" y1="12" x2="19" y2="12">'</line>
        </svg>
        ${this.buttons.text.add}
      </button>

      <button class="secondary remove">
        <svg xmlns="http://www.w3.org/2000/svg" height="16px" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round" stroke-linejoin="round">
          <line x1="5" y1="12" x2="19" y2="12"></line>
        </svg>
        ${this.buttons.text.remove}
      </button>`
    document.querySelector(this.buttons.target).before(buttons)

    // Add button listener
    document.querySelector("#grid button.add").addEventListener(
      "click",
      () => {
        this.addColumn()
      },
      false
    )

    // Remove button listener
    document.querySelector("#grid button.remove").addEventListener(
      "click",
      () => {
        this.removeColumn()
      },
      false
    )
  },

  // Generate grid
  generateGrid() {
    // Config
    let htmlInner = ""
    let codeInner = '&lt;<b>div</b> <i>class</i>=<u>"grid"</u>&gt;\n'

    // Build
    for (let col = 0; col < this.grid.current; col++) {
      htmlInner += "<div>" + (col + 1) + "</div>"
      codeInner += "  &lt;<b>div</b>&gt;" + (col + 1) + "&lt;/<b>div</b>&gt;\n"
    }

    // Display
    codeInner += "&lt;/<b>div</b>&gt;"
    document.querySelector(this.grid.gridTarget).innerHTML = htmlInner
    document.querySelector(this.grid.codeTarget).innerHTML = codeInner
  },

  // Add column
  addColumn() {
    if (this.grid.current < this.grid.max) {
      this.grid.current++
      this.generateGrid()
    }
  },

  // Remove column
  removeColumn() {
    if (this.grid.current > this.grid.min) {
      this.grid.current--
      this.generateGrid()
    }
  },
}

// Init
grid.init()