{
  let options = {
    srcFont: "6x8",
    titleFont: "12x20",
    bodyFont: "6x15:2",
    headerBgColor: g.theme.bgH,
    headerFgColor: g.theme.fg,
    headerHlColor: g.toColor(0, 1, 0),
    margin: 3,	// space on sides
    padding: 16,	// space between header and body
    lineSpacing: 0,
    fh: 20, // footer height - leave this much space for a footer
  };

  let setOptions = function (opts) {
    options = Object.assign(options, opts);
  };

  let setClipRect = function (x, y, x2, y2) {
    if (y < Bangle.appRect.y) y = Bangle.appRect.y;
    if (y2 < Bangle.appRect.y) y2 = Bangle.appRect.y;
    if (y > Bangle.appRect.y2 - 10) y = Bangle.appRect.y2 - options.fh - 1;
    if (y2 > Bangle.appRect.y2 - 10) y2 = Bangle.appRect.y2 - options.fh - 1;
    return g.setClipRect(x, y, x2, y2);
  };

  const centerString = (str, x, y, w) => {
    g.setFontAlign(0, 0);
    g.drawString(str, x + (w / 2), y);
  };

  HeaderBox = function (msg, messageRect) {
    this.icon = require("messageicons").getImage(msg);
    this.color = require("messageicons").getColor(msg, { default: g.theme.fg2 });
    this.im = g.imageMetrics(this.icon);
    this.iconSize = this.im.height;
    this.titleW = messageRect.w - this.iconSize;
    this.titleLines = (() => {
      if (msg.title) return g.setFont(options.titleFont).wrapString(msg.title, this.titleW);
      else return "";
    })();
    let sw = g.stringWidth(msg.title);	// string width
    let ew = g.stringWidth("...");	// elipsis width
    let w = this.titleW - ew - options.margin; // max width for title
    let cw = sw / msg.title.length; // character width - will only be an average if not a fixed width font
    this.titleOneLine = msg.title.substr(0, Math.floor(w / cw)).concat("...");
    this.titleLineH = g.setFont(options.titleFont).getFontHeight();
    this.titleX = 0;
    this.titleY = 0;
    this.srcLineH = g.setFont(options.srcFont).getFontHeight();
    this.srcLines = g.wrapString(msg.src, this.iconSize);
    this.srcH = this.srcLineH * this.srcLines.length;
    this.srcX = this.x2 - this.iconSize;
    this.srcY = 0;
    this.imgX = this.titleW + ((this.iconSize - this.im.width) / 2);
    this.minH = Math.max(this.titleLineH, this.im.height) + options.padding;
    this.maxH = Math.max(this.titleLineH * this.titleLines.length, this.im.height + this.srcH) + options.padding;
    this.h = this.maxH;
    this.new = msg.new ?? false;
  }; // HeaderBox

  HeaderBox.prototype.draw = function (messageRect) {
    //const getImgY = () => (this.h - options.padding - this.im.height + (this.h == this.maxH ? this.srcH : 0)) / 2;
    const getImgY = () => (this.h - options.padding - (this.im.height / 2)) / 2;
    const x = messageRect.x
    const x2 = messageRect.x2;
    const y = messageRect.y;
    if (this.h < this.minH) this.h = this.minH;
    else if (this.h > this.maxH) this.h = this.maxH;
    let y2 = messageRect.y + this.h - 1;
    exports.setClipRect(x, y, x2, y2);
    g.setBgColor(options.headerBgColor).clearRect(x, y, x2, y2)
      .setBgColor(g.theme.bg2).clearRect(x + 3, y + 3, x2 - 3, y2 - 3);
    if (this.new) g.setColor(options.headerHlColor).fillPoly([x, y, x + 20, y, x, y + 20]);
    g.setColor(options.headerFgColor)
      .setFont(options.titleFont);
    if (this.h > this.minH) {	// multi-line title
      let titleY = Math.floor(((this.h + options.padding - (this.titleLineH * this.titleLines.length)) / 2) + y);
      if (this.titleLines) {
        for (let line of this.titleLines) {
          centerString(line, x, titleY, this.titleW);
          titleY += this.titleLineH;
        }
      }
    } else {	// single-line title
      const titleY = Math.floor(((this.h + options.padding - this.titleLineH) / 2) + y);
      centerString(this.titleOneLine, x + options.margin, titleY, this.titleW);
    }
    // g.setFont(options.srcFont);
    // if (this.h == this.maxH) {
    // 	let srcY = y+4;
    // 	for (let line of this.srcLines) {
    // 		centerString(line, x2 - this.iconSize, srcY, this.iconSize);
    // 		srcY += this.srcLineH;
    // 	}
    // }
    g.setColor(this.color).drawImage(this.icon, x + this.imgX, y + getImgY());
  };

  const TextBox = function (msgGroup, messageRect) {
    this.messageGroup = msgGroup;
    this.lineH = (g.setFont(options.bodyFont).getFontHeight()) + options.lineSpacing;
    this.messages = new Array(this.messageGroup.length);
    this.numLines = 0;
    let mnum = 0;
    for (msg of this.messageGroup.bodies) {
      this.messages[mnum] = {
        msg: g.wrapString(msg, messageRect.w - options.margin),
        offset: this.numLines * this.lineH
      }
      this.numLines += this.messages[mnum].msg.length;
      mnum++;
    }
    this.scrollY = 0;
    this.minY = (messageRect.y2 - options.fh - (this.lineH * (this.numLines)));	// can't for the life of me figure out why I'm having to +1 the num of lines
    if (this.minY > 0) this.minY = 0;
  }; // TextBox

  TextBox.prototype.draw = function (messageRect, yOffset) {
    x = messageRect.x;
    y = messageRect.y + yOffset;
    x2 = messageRect.x2;
    y2 = messageRect.y2;
    exports.setClipRect(x, y, x2, y2);
    g.setColor(g.theme.fg).setBgColor(g.theme.bg)
      .clearRect(x, y, x2, y2)
      .setFont(options.bodyFont).setFontAlign(-1, -1);
    let lineY = this.scrollY;
    for (msgNum in this.messages) {
      g.drawLine(x2 - 20, y + lineY - 5, x2, y + lineY - 10)
        .drawLine(x2 - 20, y + lineY - 5, x2, y + lineY);
      //.drawLine(x, y+lineY, x, y+(this.lineH*this.messages[msgNum].length));
      for (let line of this.messages[msgNum].msg) {
        if (y + lineY >= y - this.lineH) g.drawString(line, x + options.margin, y + lineY);
        lineY += this.lineH;
      }
      g.drawLine(x + 20, y + lineY - 5, x, y + lineY - 10)
        .drawLine(x + 20, y + lineY - 5, x, y + lineY);
    }
  };

  MessageBox = function (msgGroup, yOffset) {
    this.messageGroup = msgGroup;
    //if (!Array.isArray(msgGroup)) msgGroup = [msgGroup];	// make sure we have an array
    this.yOffset = yOffset ?? 0;
    this.xOffset = 0;
    this.rect = {
      w: Bangle.appRect.w,
      h: Bangle.appRect.h,
      x: Bangle.appRect.x + this.xOffset,
      y: Bangle.appRect.y + this.yOffset,
      x2: Bangle.appRect.x2 + this.xOffset,
      y2: Bangle.appRect.y2 + this.yOffset
    };
    this.headerBox = new HeaderBox(msgGroup, this.rect);
    this.textBox = new TextBox(msgGroup, this.rect);
    let messageH = this.numLines * this.textBox.lineH;
    let boxH = this.rect.h - this.headerBox.maxH - options.fh;
    if (messageH <= boxH) this.oneScreen = true;
    else this.oneScreen = false;
    this.top = true;
    if (this.oneScreen) {
      this.bottom = true;
      this.textBox.initScrollY = Math.round((boxH - messageH) / 2);
    } else {
      this.bottom = false;
      this.textBox.initScrollY = 0;
    }
    this.textBox.scrollY = this.textBox.initScrollY;
    this.sbH = this.rect.h / messageH * this.rect.h; // scrollbar height
    this.sbRatio = (this.rect.h - this.sbH) / Math.abs(this.textBox.minY);	// scrollbar ratio
  }; // MessageBox

  MessageBox.prototype.prevOffset = Bangle.appRect.y - Bangle.appRect.h;
  MessageBox.prototype.nextOffset = Bangle.appRect.y2 + 1;

  MessageBox.prototype.setNew = function () {
    this.headerBox.new = true;
  }

  MessageBox.prototype.clearNew = function () {
    this.headerBox.new = false;
  }

  MessageBox.prototype.reset = function (yOffset) {
    if (!yOffset) yOffset = 0;
    this.yOffset = yOffset;
    this.headerBox.h = this.headerBox.maxH;
    this.textBox.scrollY = this.textBox.initScrollY;
    this.top = true;
    if (this.oneScreen) this.bottom = true;
    else this.bottom = false;
  };

  MessageBox.prototype.draw = function () {
    this.rect.x = Bangle.appRect.x + this.xOffset;
    this.rect.x2 = Bangle.appRect.x2 + this.xOffset;
    this.rect.y = Bangle.appRect.y + this.yOffset;
    this.rect.y2 = Bangle.appRect.y2 + this.yOffset;
    exports.setClipRect(this.rect.x, this.rect.y, this.rect.x2, this.rect.y2);
    g.clearRect(this.rect.x, this.rect.y, this.rect.x2, this.rect.y2);
    this.headerBox.draw(this.rect);
    this.textBox.draw(this.rect, this.headerBox.h);
    exports.setClipRect(this.rect.x, this.rect.y, this.rect.x2, this.rect.y2);
    this.drawScrollbar();
  };

  MessageBox.prototype.drawScrollbar = function () {
    if (this.oneScreen) return;
    let sbY = this.rect.y + (this.sbRatio * Math.abs(this.textBox.scrollY));
    g.setColor(g.theme.fg).drawLine(this.rect.x, sbY, this.rect.x, sbY + this.sbH);
  };

  MessageBox.prototype.scroll = function (dy) {
    if (this.oneScreen) return;
    if (this.headerBox.h > this.headerBox.minH && dy < 0) {
      this.headerBox.h += dy;
      if (this.headerBox.h < this.headerBox.minH) this.headerBox.h = this.headerBox.minH;
    } else if (this.headerBox.h < this.headerBox.maxH && dy > 0) {
      this.headerBox.h += dy;
      if (this.headerBox.h > this.headerBox.maxH) this.headerBox.h = this.headerBox.maxH;
    }
    if (this.headerBox.h == this.headerBox.minH && dy < 0) this.textBox.scrollY += dy;
    else if (dy > 0) this.textBox.scrollY += dy;
    if (this.textBox.scrollY <= this.textBox.minY - this.headerBox.h) {
      this.bottom = true;
      this.textBox.scrollY = this.textBox.minY - this.headerBox.h;
    } else {
      this.bottom = false;
    }
    if (this.textBox.scrollY >= 0 && this.headerBox.h == this.headerBox.maxH) {
      this.top = true;
      this.textBox.scrollY = this.textBox.initScrollY;
    } else {
      this.top = false;
    }
    this.draw();
  };

  module.exports.HeaderBox = HeaderBox;
  module.exports.MessageBox = MessageBox;
  module.exports.setOptions = setOptions;
  module.exports.setClipRect = setClipRect;
};