# @name    Alta Weather
# @desc    Current weather and temperature for Alta Norway
# @author  Hank_the_Tank / bagrue
# @version 2.4

# @config  latitude   number "Latitude"     default=69.97 min=-90 max=90 step=0.01
# @config  longitude  number "Longitude"    default=23.27 min=-180 max=180 step=0.01
# @config  refresh    number "Refresh"      default=5 min=1 max=60 unit=min
# @config  unit       select "Temperature"  default=C options=C,F


class Weather

  var tcol
  var wic
  var ticks
  var age
  var url
  var period
  var temp_value
  var temp_negative
  var font


  def init()

    self.tcol = 0x666666
    self.wic = "36637"
    self.ticks = 0
    self.age = 9999
    self.temp_value = 0
    self.temp_negative = false

    self.period = store.get("refresh") * 60

    self.url = "https://api.open-meteo.com/v1/forecast" +
               "?latitude=" + str(store.get("latitude")) +
               "&longitude=" + str(store.get("longitude")) +
               "&current=temperature_2m,weather_code" +
               "&timezone=auto"

    # Kompakt 6 x 7-pikslers font.
    # Hvert tall består av sju rader.
    self.font = [
    # 0
    [30, 51, 51, 51, 51, 51, 30],

    # 1
    [12, 28, 12, 12, 12, 12, 63],

    # 2
    [30, 51, 3, 14, 24, 51, 63],

    # 3
    [30, 51, 3, 14, 3, 51, 30],
  
    # 4
    [6, 14, 22, 38, 63, 6, 7],

    # 5
    [63, 48, 62, 3, 3, 51, 30],

    # 6
    [14, 24, 48, 62, 51, 51, 30],

    # 7
    [63, 51, 3, 6, 12, 12, 12],

    # 8
    [30, 51, 51, 30, 51, 51, 30],

    # 9
    [30, 51, 51, 31, 3, 6, 28]
   ]

  end


  # --------------------------------------------------
  # TEGN ETT TALL
  # --------------------------------------------------

  def digit(x, n)

    var row = 0

    while row < 7

      var bits = self.font[n][row]
      var col = 0

      while col < 6

        if (bits & (1 << (5 - col))) != 0
          pixel(x + col, row, self.tcol)
        end

        col += 1

      end

      row += 1

    end

  end


  # --------------------------------------------------
  # MINUSTEGN
  # --------------------------------------------------

  def minus(x)

    var col = 0

    while col < 5

      pixel(x + col, 3, self.tcol)
      col += 1

    end

  end


  # --------------------------------------------------
  # GRADTEGN
  # --------------------------------------------------

  def degree(x)

    pixel(x + 2, 0, self.tcol)
    pixel(x + 3, 0, self.tcol)

    pixel(x + 1, 1, self.tcol)
    pixel(x + 4, 1, self.tcol)

    pixel(x + 1, 2, self.tcol)
    pixel(x + 4, 2, self.tcol)

    pixel(x + 2, 3, self.tcol)
    pixel(x + 3, 3, self.tcol)

  end


  # --------------------------------------------------
  # TEGN TEMPERATUREN
  # --------------------------------------------------

  def draw_temperature()

    var t = self.temp_value
    var x = 11

    # Minustegn
    if self.temp_negative

      self.minus(x)
      x += 7

    end

    # Ett tall
    if t < 10

      self.digit(x, t)
      x += 7

    # To tall
    else

      var tens = int(t / 10)
      var ones = t - tens * 10

      self.digit(x, tens)
      x += 7

      self.digit(x, ones)
      x += 7

    end

    # Gradtegn
    self.degree(x + 1)

  end


  # --------------------------------------------------
  # MOTTA VÆRDATA
  # --------------------------------------------------

  def on_body(body, status)

    if body == nil
      return
    end

    if status != 200
      return
    end

    var m = re.search(
      "temperature_2m\":([-0-9.]+)",
      body
    )

    var c = re.search(
      "weather_code\":([0-9]+)",
      body
    )

    if m == nil || c == nil
      return
    end

    # Berry bruker real(), ikke num().
    var t = real(m[1])

    # Celsius eller Fahrenheit
    var u = store.get("unit")

    if u == "F"
      t = t * 1.8 + 32
    end

    # Temperaturfarge
    if t > 20

      self.tcol = 0xFF0000

    elif t < 0

      self.tcol = 0x0080FF

    else

      self.tcol = 0xFFFFFF

    end

    # Rund av uten ternary-operator
    var ti

    if t >= 0
      ti = int(t + 0.5)
    else
      ti = int(t - 0.5)
    end

    # Lagre minus separat
    if ti < 0

      self.temp_negative = true
      self.temp_value = 0 - ti

    else

      self.temp_negative = false
      self.temp_value = ti

    end

    # Værkode
    var k = int(c[1])
    var ic = "36637"

    if k == 0

      # Klarvær
      ic = "53386"

    elif k <= 2

      # Delvis skyet
      ic = "2286"

    elif k == 3

      # Overskyet
      ic = "53384"

    elif k <= 48

      # Tåke
      ic = "17055"

    elif k <= 67

      # Regn
      ic = "2720"

    elif k <= 77

      # Snø
      ic = "2289"

    elif k <= 82

      # Regnbyger
      ic = "49300"

    elif k <= 86

      # Snøbyger
      ic = "2289"

    elif k >= 95

      # Tordenvær
      ic = "29839"

    end

    self.wic = ic
    self.age = 0

  end


  # --------------------------------------------------
  # OPPDATERING
  # --------------------------------------------------

  def loop()

    self.age += 1

    if self.ticks <= 0

      self.ticks = self.period

      http.get(
        self.url,
        /body, status -> self.on_body(body, status),
        {
          "find": "\"current\":",
          "keep": 256
        }
      )

    end

    self.ticks -= 1

  end


  # --------------------------------------------------
  # SKJERM
  # --------------------------------------------------

  def draw()

    clear()

    # Værikon
    if !icon(self.wic, 0, 0)
      circle_fill(4, 4, 3, 0xFFCC00)
    end

    # Temperatur
    if self.age < 9999

      self.draw_temperature()

    else

      text(6, 6, "...", 0x666666)

    end

    # Rød prikk hvis værdataene er gamle
    if self.age > 1200
      pixel(width() - 1, height() - 1, 0xFF0000)
    end

  end


  # --------------------------------------------------
  # KNAPP
  # --------------------------------------------------

  def on_button(btn)

    if btn == "select"
      self.ticks = 0
    end

  end

end


return Weather()