const c = document.querySelector(".console")
const ps1 = "[fr@website ~]$ "
const motd = "Welcome to my website!<br>You can use `help` for more informations :)"
let line = "";

function exec(command) {
  switch (command[0]) {
    case "help":
      line = "help<br>author<br>contact<br>clear<br>echo"
      break;
    case "author":
      line = "Filip Rojek, 2023"
      break
    case "contact":
      line = "Filip Rojek &lt<a href='mailto: &#102;&#105;&#108;&#105;&#112;&#064;&#102;&#105;&#108;&#105;&#112;&#114;&#111;&#106;&#101;&#107;&#046;&#099;&#122;'>&#102;&#105;&#108;&#105;&#112;&#064;&#102;&#105;&#108;&#105;&#112;&#114;&#111;&#106;&#101;&#107;&#046;&#099;&#122;</a>&gt<br>web: <a href='https://filiprojek.cz' target='_blank'>www.filiprojek.cz</a><br>telegram: <a href='https://t.me/filiprojek' target='_blank'>@filiprojek</a>"
      break
    case "clear":
      write("000ctrll")
      return false
    case "echo":
      line = ""
      command.forEach((cmd, i) => {
        if (i === 0) return
        line += cmd + " "
      });
      line = line.substring(0, line.length - 1) // remove last space
      break
    default:
      line = "frsh: " + command[0] + ": command not found"
      break;
  }

  return line
}

function write(key, payload) {
  switch(key) {
    case "Enter":
      command = c.lastChild.textContent.replace(ps1, "")
      command = command.split(" ");
      let out = exec(command)
      if(out !== false) {
        line = document.createElement("p")
        line.innerHTML += out
        line.innerHTML += "<br>"
        c.appendChild(line)
        line = document.createElement("p")
        line.innerHTML += ps1
        c.appendChild(line)
      }
      command = ""
      break
    case "000ctrll":
      c.innerHTML = ""
      if(payload == motd) c.innerHTML = motd
      line = document.createElement("p")
      line.innerHTML += ps1
      c.appendChild(line)
      break
    case "000backspace":
      if(c.lastChild.textContent.slice(0, -1) !== ps1.slice(0, -1)) {
        c.lastChild.innerHTML = c.lastChild.textContent.slice(0, -1)
      }
      break

    default:
      c.lastChild.innerHTML += key
  }
}

function customCtrlShortcuts(plusKey) {
  document.addEventListener("keydown", e => {
    if(e.ctrlKey && e.key == plusKey) {
      e.preventDefault()
      write("000ctrl"+plusKey)
    }
  })
}

// On load init the terminal
window.addEventListener("load", () => {
  write("000ctrll", motd)
  if (navigator.userAgent.toLowerCase().includes("mobile")) {
    const mi = document.querySelector(".mobile-input")
    mi.style="opacity: 0; width: 0; height: 0"
    c.addEventListener("click", e => {
      mi.focus()
    })
  }
})

// Capture the keypress
window.addEventListener("keypress", e => {
  e.preventDefault()
  write(e.key)
})

window.addEventListener("keydown", e => {
  if(e.key == "Backspace") {
    e.preventDefault()
    write("000backspace")
  }
})

// Register custom ctrl shortcuts
customCtrlShortcuts("l") // ctrl + l
customCtrlShortcuts("c") // ctrl + c