const TODAY = new Date("2023-04-14");
const TODAY_LOCALE = TODAY.toLocaleDateString("en-GB");

const EMACS_ITEM = {
  backgroundColor: "#8261bb",
  borderColor: "black",
  borderWidth: 0,
  borderSkipped: false,
  borderRadius: 0,
  datalabels: {
    color: "white",
  },
};

const COLORS = [
  "#77bceb",
  "#ff6384",
  "#77c0c0",
  "#ff9f40",
  "#ffcd56",
  "#c9cbcf",
];

let i = 0;

const EMACS_DATA = {
  labels: [
    "Editor/IDE",
    "File manager",
    "Email",
    "RSS",
    "Passwords",
    "Multimedia",
    "WM",
  ],
  datasets: [
    {
      label: "Jupyter",
      data: [
        {
          name: "Editor/IDE",
          span: [new Date("2018-10-24"), new Date("2021-04-01")],
        },
      ],
      yAxisID: "yAxis1",
    },
    {
      label: "NeoVim",
      data: [
        {
          name: "Editor/IDE",
          span: [new Date("2019-03-30"), new Date("2020-10-12")],
        },
      ],
      yAxisID: "yAxis1",
    },
    {
      label: "DataGrip",
      data: [
        {
          name: "Editor/IDE",
          span: [new Date("2020-02-01"), TODAY],
        },
      ],
      yAxisID: "yAxis1",
    },
    {
      label: "Emacs",
      data: [
        {
          name: "Editor/IDE",
          span: [new Date("2020-10-12"), TODAY],
        },
      ],
      yAxisID: "yAxis1",
      ...EMACS_ITEM,
    },
    {
      label: "vifm",
      data: [
        {
          name: "File manager",
          span: [new Date("2020-02-17"), new Date("2020-11-11")],
        },
      ],
      yAxisID: "yAxis2",
    },
    {
      label: "Dired",
      data: [
        {
          name: "File manager",
          span: [new Date("2020-11-11"), TODAY],
        },
      ],
      yAxisID: "yAxis2",
      ...EMACS_ITEM,
    },
    {
      label: "Mailspring",
      data: [
        {
          name: "Email",
          span: [new Date("2019-01-28"), new Date("2021-01-29")],
        },
      ],
      yAxisID: "yAxis3",
    },
    {
      label: "notmuch",
      data: [
        {
          name: "Email",
          span: [new Date("2021-01-29"), TODAY],
        },
      ],
      yAxisID: "yAxis3",
      ...EMACS_ITEM,
    },
    {
      label: "newsboat",
      data: [
        {
          name: "RSS",
          span: [new Date("2021-01-22"), new Date("2021-05-24")],
        },
      ],
      yAxisID: "yAxis4",
    },
    {
      label: "elfeed",
      data: [
        {
          name: "RSS",
          span: [new Date("2021-05-24"), TODAY],
        },
      ],
      yAxisID: "yAxis4",
      ...EMACS_ITEM,
    },
    {
      label: "Tiny Tiny RSS",
      data: [
        {
          name: "RSS",
          span: [new Date("2022-05-28"), TODAY],
          hint: "Sync with elfeed",
        },
      ],
      yAxisID: "yAxis4",
    },
    {
      label: "KeePassXC",
      data: [
        {
          name: "Passwords",
          span: [new Date("2019-01-31"), new Date("2021-07-26")],
        },
      ],
      yAxisID: "yAxis5",
    },
    {
      label: "password-store & pass.el",
      data: [
        {
          name: "Passwords",
          span: [new Date("2021-07-26"), TODAY],
        },
      ],
      yAxisID: "yAxis5",
    },
    {
      label: "MPD",
      data: [
        {
          name: "Multimedia",
          span: [new Date("2020-07-26"), TODAY],
        },
      ],
      yAxisID: "yAxis6",
    },
    {
      label: "ncmpcpp",
      data: [
        {
          name: "Multimedia",
          span: [new Date("2020-07-26"), new Date("2021-07-31")],
        },
      ],
      yAxisID: "yAxis6",
    },
    {
      label: "EMMS",
      data: [
        {
          name: "Multimedia",
          span: [new Date("2021-07-31"), TODAY],
        },
      ],
      yAxisID: "yAxis6",
      ...EMACS_ITEM,
    },
    {
      label: "MPV",
      data: [
        {
          name: "Multimedia",
          span: [new Date("2021-09-07"), TODAY],
        },
      ],
      yAxisID: "yAxis6",
    },
    {
      label: "Cinnamon",
      data: [
        {
          name: "WM",
          span: [new Date("2018-08-01"), new Date("2020-05-08")],
        },
      ],
      yAxisID: "yAxis7",
    },
    {
      label: "i3(-gaps)",
      data: [
        {
          name: "WM",
          span: [new Date("2020-05-08"), new Date("2021-11-14")],
        },
      ],
      yAxisID: "yAxis7",
    },
    {
      label: "EXWM",
      data: [
        {
          name: "WM",
          span: [new Date("2021-11-14"), TODAY],
        },
      ],
      yAxisID: "yAxis7",
      ...EMACS_ITEM,
    },
  ].map((d) => {
    if (!d.backgroundColor) {
      d.backgroundColor = COLORS[i];
    }
    i = (i + 1) % COLORS.length;
    return d;
  }),
};

function emacsChart() {
  const ctx = document.getElementById("chart-emacs-history");
  new Chart(ctx, {
    type: "bar",
    data: EMACS_DATA,
    plugins: [ChartDataLabels],
    options: {
      indexAxis: "y",
      grouped: true,
      aspectRatio: 1.2,
      parsing: {
        yAxisKey: "name",
        xAxisKey: "span",
      },
      layout: {
        padding: 1,
      },
      scales: {
        x: {
          type: "time",
          min: new Date("2018-09"),
        },
        ...Object.fromEntries(
          [1, 2, 3, 4, 5, 6].map((i) => [
            `yAxis${i}`,
            {
              display: false,
            },
          ])
        ),
      },
      plugins: {
        legend: {
          display: false,
        },
        title: {
          display: true,
          text: "Everything goes into Emacs",
          color: "black",
          font: {
            size: 15
          }
        },
        datalabels: {
          formatter: function (value, context) {
            return context.dataset.label;
          },
          color: "black",
        },
        tooltip: {
          callbacks: {
            label: function (context) {
              const startDate = new Date(
                context.parsed._custom.start
              ).toLocaleDateString("en-GB");
              let endDate = new Date(
                context.parsed._custom.end
              ).toLocaleDateString("en-GB");
              if (endDate === TODAY_LOCALE) {
                endDate = "Today";
              }
              const label = context.dataset.label;
              return `${label}: ${startDate} - ${endDate}`;
            },
          },
        },
      },
    },
  });
}

document.addEventListener(
  "DOMContentLoaded",
  function () {
    emacsChart();
  },
  false
);