# @name    Ecowitt API v2
# @desc    Holt Ecowitt-Daten direkt von der API; OK wechselt die Seite
# @version 2.0
# @config  application_key text "Application Key" default="" maxlen=64
# @config  api_key text "API Key" default="" maxlen=64
# @config  mac text "MAC-Adresse" default="" maxlen=32
# @config  every number "Refresh" default=300 min=30 max=3600 unit=s
# @config  show number "Seite" default=5 min=2 max=30 unit=s
# @config  scroll_speed slider "Scrolltempo" default=80 min=20 max=200 unit=%
# @config  temp_unit number "Temp Unit" default=1 min=1 max=2
# @config  rain_unit number "Regen Unit" default=12 min=1 max=20
# @config  wind_unit number "Wind Unit" default=7 min=1 max=20

import json

class EcowittApiV2
  var url
  var every
  var show
  var scroll_speed
  var scroll_opts
  var ticks
  var in_flight
  var items
  var text_color
  var page
  var page_started

  def init()
    self.every = store.get("every")
    self.show = store.get("show")
    self.scroll_speed = store.get("scroll_speed")
    self.scroll_opts = {"speed": clamp(self.scroll_speed, 20, 200)}
    self.ticks = 0
    self.in_flight = false
    self.items = store.get("items")
    self.text_color = settings.get("textColor")
    self.page = 0
    self.page_started = now_ms()
    if self.text_color == nil
      self.text_color = 0xFFFFFF
    end
    self.url = self.build_url()
    if self.items == nil || size(self.items) == 0
      self.items = [{"text": "Wetter n/a", "duration": 15000}]
    end
  end

  def build_url()
    var application_key = store.get("application_key")
    var api_key = store.get("api_key")
    var mac = store.get("mac")
    if type(application_key) != "string" || application_key == ""
      return nil
    end
    if type(api_key) != "string" || api_key == ""
      return nil
    end
    if type(mac) != "string" || mac == ""
      return nil
    end

    return "http://api.ecowitt.net/api/v3/device/real_time?" +
           "application_key=" + application_key +
           "&api_key=" + api_key +
           "&mac=" + mac +
           "&call_back=all" +
           "&temp_unitid=" + str(store.get("temp_unit")) +
           "&rainfall_unitid=" + str(store.get("rain_unit")) +
           "&wind_speed_unitid=" + str(store.get("wind_unit"))
  end

  def clean_text(label)
    if type(label) != "string"
      return "-"
    end

    var m = re.match("^([-0-9.]+)℃$", label)
    if m != nil
      return m[1] + "C"
    end

    m = re.match("^([-0-9.]+)°C$", label)
    if m != nil
      return m[1] + "C"
    end

    return label
  end

  def format_now()
    var h = hour()
    var m = minute()
    if h < 0 || m < 0
      return nil
    end
    var mm = m < 10 ? "0" + str(m) : str(m)
    return "Gemessen " + str(h) + ":" + mm
  end

  def make_item(text, icon_id, duration)
    return {
      "text": self.clean_text(text),
      "icon": icon_id,
      "duration": duration
    }
  end

  def on_body(body, status)
    self.in_flight = false
    if body == nil || status < 200 || status >= 300
      return
    end

    var root = json.load(body)
    if !isinstance(root, map)
      return
    end

    var data = root.find("data")
    if !isinstance(data, map)
      return
    end

    var indoor = data.find("indoor")
    var outdoor = data.find("outdoor")
    var wind = data.find("wind")
    if !isinstance(indoor, map) || !isinstance(outdoor, map) || !isinstance(wind, map)
      return
    end

    var temp_in = indoor.find("temperature")
    var hum_in = indoor.find("humidity")
    var temp_out = outdoor.find("temperature")
    var wind_speed = wind.find("wind_speed")
    if !isinstance(temp_in, map) || !isinstance(hum_in, map) || !isinstance(temp_out, map) || !isinstance(wind_speed, map)
      return
    end

    var next_items = []
    next_items.push(self.make_item(
      str(temp_in.find("value", "-")) + str(temp_in.find("unit", "")),
      "68435",
      15000
    ))
    next_items.push(self.make_item(
      str(hum_in.find("value", "-")) + str(hum_in.find("unit", "")),
      "39041",
      15000
    ))
    next_items.push(self.make_item(
      str(temp_out.find("value", "-")) + str(temp_out.find("unit", "")),
      "44092",
      15000
    ))

    var rainfall = data.find("rainfall_piezo")
    if isinstance(rainfall, map)
      var daily = rainfall.find("daily")
      if isinstance(daily, map)
        var rain_value = daily.find("value")
        if num(rain_value) != nil && num(rain_value) > 0
          next_items.push(self.make_item(
            str(rain_value) + str(daily.find("unit", "")),
            "2720",
            15000
          ))
        end
      end
    end

    next_items.push(self.make_item(
      str(wind_speed.find("value", "-")) + str(wind_speed.find("unit", "")),
      "1153",
      15000
    ))

    var measured = self.format_now()
    if measured != nil
      next_items.push(self.make_item(measured, "2438", 15000))
    end

    if size(next_items) == 0
      return
    end

    self.items = next_items
    self.page = self.page % size(self.items)
    store.set("items", self.items)
  end

  def loop()
    if self.url == nil
      return
    end

    if self.ticks <= 0
      self.ticks = self.every
      if !self.in_flight
        self.in_flight = true
        http.get(self.url, / b, st -> self.on_body(b, st))
      end
    end
    self.ticks -= 1
  end

  def duration()
    if self.items == nil || size(self.items) == 0
      return 15000
    end
    return size(self.items) * clamp(self.show, 2, 30) * 1000
  end

  def on_button(btn)
    if btn != "select" || self.items == nil || size(self.items) == 0
      return
    end

    var now = now_ms()
    var show_ms = clamp(self.show, 2, 30) * 1000
    self.page = (self.page + int((now - self.page_started) / show_ms) + 1) % size(self.items)
    self.page_started = now
  end

  def draw()
    clear()

    if self.url == nil
      text(1, 6, "API?", self.text_color)
      return
    end

    if self.items == nil || size(self.items) == 0
      text(1, 6, "Wetter n/a", self.text_color)
      return
    end

    var show_ms = clamp(self.show, 2, 30) * 1000
    var index = (self.page + int((now_ms() - self.page_started) / show_ms)) % size(self.items)
    var item = self.items[index]
    if !isinstance(item, map)
      text(1, 6, "Wetter n/a", self.text_color)
      return
    end

    var label = item.find("text", "-")
    var icon_name = item.find("icon")
    var has_icon = type(icon_name) == "string" && icon_name != ""
    if has_icon
      if !icon(icon_name, 0, 0)
        rect_fill(0, 0, 8, 8, 0x222222)
      end
      var avail = width() - 9
      if text_ink_width(label) > avail
        scroll_text(9, 6, avail, label, self.text_color, self.scroll_opts)
      else
        text(9 + (avail - text_ink_width(label)) / 2, 6, label, self.text_color)
      end
      return
    end

    if text_ink_width(label) > width()
      scroll_text(label, self.text_color, self.scroll_opts)
    else
      text((width() - text_ink_width(label)) / 2, 6, label, self.text_color)
    end
  end
end

return EcowittApiV2()