# @name Wetter
# @desc Wetter, 15-Stunden-Prognose und Mondphase
# @author Hank_the_Tank / Codex
# @version 3.0

class Weather
  var st, fc, label, tcol, wic, mic, mday, ticks, busy, age

  def init()
    # Farbstufen: Untergrenze, Farbe - dazwischen wird interpoliert
    self.st = [-12, 0xD977DF, -6, 0x9545BC, -1, 0x4B379C, 0, 0xFEC4FF,
               4, 0x31B8DB, 10, 0x31DB8B, 15, 0x6ED228, 21, 0xFFFF28,
               27, 0xF87E27, 32, 0xCF3927, 38, 0xA12527]
    self.fc = []
    self.label = store.get("label")
    self.tcol = store.get("col", 0x666666)
    self.wic = store.get("icon", "")
    self.mic = ""
    self.mday = -1
    self.ticks = 0
    self.busy = false
    self.age = 9999
  end

  def on_body(w, status)
    self.busy = false
    if w == nil return end
    var m = re.search("_2m\":([-0-9.]+)", w)
    var c = re.search("code\":(\\d+)", w)
    var h = re.search("_2m\":\\[([^\\]]*)", w)
    if m == nil || c == nil || h == nil return end
    var t = num(m[1])
    if t == nil return end

    # i == 0 ist die aktuelle Temperatur, danach die Stundenwerte
    var s = self.st
    var vals = re.matchall("[-0-9.]+", h[1])
    var n = size(vals)
    if n > 15 n = 15 end
    var fc = []
    var i = 0
    while i <= n
      var v = i == 0 ? t : num(vals[i - 1])
      var col = s[1]
      if v > s[0]
        var j = 0
        while j < 20 && v >= s[j + 2]
          j += 2
        end
        if j >= 20
          col = s[21]
        else
          var a = s[j + 1]
          var b = s[j + 3]
          var f = (v - s[j]) * 1.0 / (s[j + 2] - s[j])
          col = rgb(int(a / 65536 % 256 + (b / 65536 % 256 - a / 65536 % 256) * f),
                    int(a / 256 % 256 + (b / 256 % 256 - a / 256 % 256) * f),
                    int(a % 256 + (b % 256 - a % 256) * f))
        end
      end
      if i == 0
        self.tcol = col
      else
        fc.push(col)
      end
      i += 1
    end
    self.fc = fc
    self.label = str(int(t + (t >= 0 ? 0.5 : -0.5))) + "°"

    var k = int(num(c[1]))
    var ic = "36637"
    if k == 0     ic = "53386"
    elif k <= 2   ic = "2286"
    elif k == 3   ic = "53384"
    elif k <= 48  ic = "17055"
    elif k <= 67  ic = "2720"
    elif k <= 77  ic = "2289"
    elif k <= 82  ic = "49300"
    elif k <= 86  ic = "2289"
    elif k >= 95  ic = "29839"
    end
    self.wic = ic
    self.age = 0

    store.set("label", self.label)
    store.set("col", self.tcol)
    store.set("icon", ic)
  end

  def loop()
    var d = day()
    if d != self.mday
      self.mday = d
      var mo = month()
      var a = int((14 - mo) / 12)
      var yy = year() + 4800 - a
      var mm = mo + 12 * a - 3
      var f = (d + int((153 * mm + 2) / 5) + 365 * yy + int(yy / 4) -
               int(yy / 100) + int(yy / 400) - 2483595) / 29.53058867
      f -= int(f)
      var ic = "2317"
      if f < 0.03 || f >= 0.97  ic = "2318"
      elif f < 0.22             ic = "2319"
      elif f < 0.28             ic = "2320"
      elif f < 0.48             ic = "2321"
      elif f < 0.52             ic = "2314"
      elif f < 0.72             ic = "2315"
      elif f < 0.78             ic = "2316"
      end
      self.mic = ic
    end

    self.age += 1
    if self.ticks <= 0
      self.ticks = 300
      if !self.busy
        self.busy = true
        http.get("https://api.open-meteo.com/v1/forecast" +
                 # ---- Standort hier setzen ----
                 "?latitude=52.52&longitude=13.40" +
                 # ------------------------------
                 "&current=temperature_2m,weather_code&hourly=temperature_2m" +
                 "&forecast_hours=15&timeformat=unixtime&timezone=auto",
                 / b, st -> self.on_body(b, st),
                 {'find': "\"current\":", 'keep': 640})
      end
    end
    self.ticks -= 1
  end

  def draw()
    clear()
    if self.label == nil
      text(6, 6, "...", 0x666666)
      return
    end
    if !icon(self.wic, 0, 0)
      circle_fill(4, 4, 3, 0xFFCC00)
    end
    text(9 + int((14 - text_ink_width(self.label)) / 2), 6, self.label, self.tcol)
    icon(self.mic, 23, 0)
    var i = 0
    var n = size(self.fc)
    while i < n
      pixel(8 + i, 7, self.fc[i])
      i += 1
    end
    if self.age > 1200
      pixel(width() - 1, height() - 1, 0xFF0000)
    end
  end

  def on_button(btn)
    if btn == "select" self.ticks = 0 end
  end
end

return Weather()