{
  //
  // ATTENTION: This code is maintained at https://www.mediawiki.org/wiki/Template:Graph:Weather_monthly_history
  //            Please do not modify it anywhere else, as it may get copied and override your changes.
  //            Suggestions can be made at https://www.mediawiki.org/wiki/Template_talk:Graph:Weather_monthly_history
  //

  "version": 2,
  "width": 500,
  "height": 400,

  "signals": [
    { "name": "init_years", "init": 7 },
    { "name": "gapHeight", "init": 26 },
    {
      // Hide overview if total height is too small
      "name": "showOverview",
      "init": {"expr": "true || height < (gapHeight + 100)" }
    },
    { "name": "overviewHeight", "init": {"expr": "showOverview ? 40 : 0" } },
    { "name": "detailHeight", "init": {"expr": "height - (showOverview ? overviewHeight + gapHeight : 0)" } },
    { "name": "overviewYPos", "init": {"expr": "height - overviewHeight" } },
    {
      "name": "brush_start",
      "init": {"expr": "datetime(year(now())-init_years, month(now()))"},
      "streams": [{
        "type": "@overview:mousedown, @overview:touchstart", 
        "expr": "clamp(eventX(), 0, width)",
        "scale": {"name": "xOverview", "invert": true}
      }]
    },
    {
      "name": "brush_end",
      "init": {"expr": "datetime(year(now()), month(now()))"},
      "streams": [{
        "type": "@overview:mousedown, [@overview:mousedown, window:mouseup] > window:mousemove, @overview:mouseup, @overview:touchstart, [@overview:touchstart, window:touchend] > window:touchmove, @overview:touchend",
        "expr": "clamp(eventX(), 0, width)",
        "scale": {"name": "xOverview", "invert": true}
      }]
    },
    {
      "name": "min_date", 
      "init": {"expr": "datetime(year(now())-init_years, month(now()))"},
      "expr": "time(brush_start) === time(brush_end) ? datetime(year(brush_start)-init_years/2, month(brush_start)) : min(brush_start, brush_end)"
    },
    {
      "name": "max_date", 
      "init": {"expr": "datetime(year(now()), month(now()))"},
      "expr": "time(brush_start) === time(brush_end) ? datetime(year(brush_start)+init_years/2, month(brush_start)) : max(brush_start, brush_end)"
    },
    {
      "name": "barwidth", 
      "init": {"expr": "max(1, (width / (1+12*(year(max_date)-year(min_date))+month(max_date)-month(min_date)) - 2))"},
      "expr": "max(1, (width / (1+12*(year(max_date)-year(min_date))+month(max_date)-month(min_date)) - 2))"
    },
    {
      "name": "tooltip",
      "init": {"expr": "{x: 0, y: 0, datum: false }"}, 
      "streams": [
        {"type": "@detailBar:mouseout, @overview:touchstart", "expr": "{x: 0, y: 0, datum: false }" },
        {"type": "@detailBar:mouseover, @detailBar:touchstart", "expr": "{x: eventX(), y: eventY(), datum: eventItem().datum}" }
      ] 
    },
    { "name": "isMetric", "init": true,
      "streams": [{"type": "@metricIndicator:click", "expr": "!isMetric"}]
    },
    {
      "name": "degrees", 
      "init": {"expr": "if(isMetric,'°C','°F')"},
      "expr": "if(isMetric,'°C','°F')"
    },
    {
      "name": "len", 
      "init": {"expr": "if(isMetric,'mm','inches')"},
      "expr": "if(isMetric,'mm','inches')"
    },
  ],

  "data": [{
    "name": "table",
    "url": "tabular:///{{{table}}}",
    "format": {"type": "json", "property": "data", "parse": {"date": "date"} },
    "transform": [
      {"type": "filter", "test": "datum.avgLowTemp != null && datum.avgHighTemp != null"},
      {"type": "formula", "field": "avgInC", "expr": "(datum.avgHighTemp+datum.avgLowTemp)/2"},
      {"type": "formula", "field": "tempHigh", "expr": "if(isMetric,datum.avgHighTemp,datum.avgHighTemp*9/5+32)"},
      {"type": "formula", "field": "tempLow", "expr": "if(isMetric,datum.avgLowTemp,datum.avgLowTemp*9/5+32)"},
    ]
  },{
    "name": "stats",
    "source": "table",
    "transform": [{"type": "aggregate", "summarize": [
      {"field": "tempHigh", "ops": "max"},
      {"field": "tempLow", "ops": "min"}
    ]}]
  },{
    "name": "dummyOneValue",
    "values": [{}]
  }],
  
  "scales": [{
      "name": "xOverview",
      "type": "time",
      "range": "width",
      "domain": {"data": "table", "field": "date"}
    },{
      "name": "yOverview",
      "type": "linear",
      "rangeMin": {"signal": "overviewHeight"},
      "nice": true,
      "domainMax": {"data": "stats", "field": "max_tempHigh"},
      "domainMin": {"data": "stats", "field": "min_tempLow"}
    },{
      "name": "xDetail",
      "type": "time",
      "range": "width",
      "domainMin": {"signal": "min_date"},
      "domainMax": {"signal": "max_date"}
    },{
      "name": "yDetail",
      "type": "linear",
      "rangeMin": {"signal": "detailHeight"},
      "nice": true,
      "domainMax": {"data": "stats", "field": "max_tempHigh"},
      "domainMin": {"data": "stats", "field": "min_tempLow"}
    },{
      "name": "c",
      "type": "linear",
      "domain": [0, 5.2,7.3,9.4,11.5,13.6,15.7,17.8,19.9,22.0,24.1],
      "range": ["#313695", "#4575b4", "#74add1", "#abd9e9", "#e0f3f8", "#ffffbf", "#fee090", "#fdae61", "#f46d43", "#d73027", "#a50026"],
      "zero": false
  }],

  "marks": [
    {
      "name": "metricIndicator",
      "type": "text",
      "properties": {
        "update": {
          "x": {"value": -46},
          "y": {"value": 5},
          "text": {"signal": "degrees"},
          "fill": {"value": "#00f"},
          "fontSize":  {"value": 16},
          "fontWeight": {"value": "bold"}
        }
      }
    },

    {
      "type": "group",
      "name": "detail",
      "properties": {
        "enter": {
          "height": {"signal": "detailHeight"},
          "width": {"signal": "width"}
        }
      },
      "axes": [{
        "type": "x",
        
        "name":"blah",
        
        
        "scale": "xDetail",
        "ticks": 5
      },{
        "type": "y",
        "scale": "yDetail",
        "title": "Temperature",
        "grid": true,
        "layer": "back",
        "properties": {
          "axis": {
            "stroke": {"value": "#fff"},
            "strokeWidth": {"value": 0}
          }
        }
      }],
      "marks": [{
        "type": "rule",
        "properties": {
          "enter": {
            "y": {"scale": "yDetail", "value": 0},
            "x": {"value": 0},
            "x2": {"signal": "width"},
            "stroke": {"value": "#313695"},
            "strokeWidth": {"value": 2},
            "strokeDash": {"value": [8]}
          }
        }
      },{
        "type": "group",
        "properties": {
          "enter": {
            "height": {"field": {"group": "height"} },
            "width": {"field": {"group": "width"} },
            "clip": {"value": true}
          }
        },
        "marks": [{
          "type": "rect",
          "name": "detailBar",
          "from": {"data": "table"},
          "properties": {
            "update": {
              "x": {"scale": "xDetail", "field": "date"},
              "width": {"signal": "barwidth"},
              "y": {"scale": "yDetail", "field": "tempLow"},
              "y2": {"scale": "yDetail", "field": "tempHigh"},
              "stroke": {"scale": "c", "field": "avgInC"},
              "fill": {"scale": "c", "field": "avgInC"},
              "fillOpacity": {"value": 0.4},
              "strokeWidth": {"value": 1.5}
             }
          }
        }]
      }]
    },

    {
      "type": "group",
      "name": "overview",
      "from": {
        "data": "dummyOneValue",
        "transform": [{"type": "filter", "test": "showOverview"}]
      },
      "properties": {
        "enter": {
          "x": {"value": 0},
          "y": {"signal": "overviewYPos"},
          "height": {"signal": "overviewHeight"},
          "width": {"signal": "width"},
          "fill": {"value": "transparent"}
        }
      },
      "axes": [{
        "type": "x",
        "scale": "xOverview",
        "ticks": 5,
        "title": "Year selector"
      }],
      "marks": [{
        "type": "rect",
        "from": { "data": "table" },
        "properties": {
          "update": {
            "x": {"scale": "xOverview", "field": "date"},
            "y": {"scale": "yOverview", "field": "tempLow"},
            "y2": {"scale": "yOverview", "field": "tempHigh"},
            "stroke": {"scale": "c", "field": "avgInC"},
            "strokeWidth": {"value": 1}
           }
        }
      },{
        "type": "rect",
        "properties": {
          "enter": {
            "y": {"value": 0},
            "height": {"signal": "overviewHeight"},
            "fill": {"value": "#333"},
            "fillOpacity": {"value": 0.3}
          },
          "update": {
            "x": {"scale": "xOverview", "signal": "min_date"},
            "x2": {"scale": "xOverview", "signal": "max_date"}
          }
        }
      }]
    },

    {
      "type": "group",
      "from": {
        "data": "dummyOneValue",
        "transform": [
          {"type": "filter", "test": "tooltip.datum"},
          {"type": "formula", "field": "offsetX", "expr": "5"},
          {"type": "formula", "field": "offsetY", "expr": "30"},
          {"type": "formula", "field": "tipWidth", "expr": "200"},
          {"type": "formula", "field": "tipHeight", "expr": "80"},
          {"type": "formula", "field": "alignLeft", "expr": "tooltip.x > width - datum.offsetX - datum.tipWidth"},
          {"type": "formula", "field": "alignTop", "expr": "tooltip.y > height - datum.offsetY - datum.tipHeight"},
          {"type": "formula", "field": "x", "expr": "max(0, tooltip.x + (datum.alignLeft ? -datum.offsetX-datum.tipWidth : datum.offsetX ))"},
          {"type": "formula", "field": "y", "expr": "tooltip.y + (datum.alignTop ? -1 : 1) * datum.offsetY"},
        ]
      },
      "properties": {
        "update": {
          "x": {"field": "x" }, "y": {"field": "y" },
          "width": {"field": "tipWidth" },
          "height": {"field": "tipHeight" },
          "fill": {"value": "#fff"},
          "fillOpacity": {"value": 0.85},
          "stroke": {"value": "#aaa"},
          "strokeWidth": {"value": 0.5}
        }
      },

      "marks": [
        {
          "type": "text",
          "properties": {
            "update": {
              "x": {"value": 6}, "y": {"value": 14},
              "text": {"template": "\u007b{tooltip.datum.date|time:'%B %Y'}\u007d"},
              "fill": {"value": "black"},
              "fontWeight": {"value": "bold"}
            }
          }
        },
        {
          "type": "text",
          "properties": {
            "update": {
              "x": {"value": 6}, "y": {"value": 29},
              "text": {"template": "monthly min/max: \u007b{tooltip.datum.lowTemp|number:'.1f'}\u007d / \u007b{tooltip.datum.highTemp|number:'.1f'}\u007d \u007b{degrees}\u007d"},
              "fill": {"value": "black"},
            }
          }
        },
        {
          "type": "text",
          "properties": {
            "update": {
              "x": {"value": 6}, "y": {"value": 44},
              "text": {"template": "average low/high: \u007b{tooltip.datum.tempLow|number:'.1f'}\u007d / \u007b{tooltip.datum.tempHigh|number:'.1f'}\u007d \u007b{degrees}\u007d"},
              "fill": {"value": "black"},
            }
          }
        },
        {
          "type": "text",
          "properties": {
            "update": {
              "x": {"value": 6}, "y": {"value": 59},
              "text": {"template": "precipitation days / \u007b{len}\u007d: \u007b{tooltip.datum.precipDays|number:'.1f'}\u007d / \u007b{tooltip.datum.precip|number:'.1f'}\u007d"},
              "fill": {"value": "black"},
            }
          }
        },
        {
          "type": "text",
          "properties": {
            "update": {
              "x": {"value": 6}, "y": {"value": 74},
              "text": {"template": "snow days / total \u007b{len}\u007d: \u007b{tooltip.datum.snowfallDays|number:'.1f'}\u007d / \u007b{tooltip.datum.snowfall|number:'.1f'}\u007d"},
              "fill": {"value": "black"},
            }
          }
        }
      ]
    }


  ]
}