template_variables <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "text_color",
  "#000",
  "body",
  "Text Color",
  "header_color",
  "#000",
  "h1, h2, h3",
  "Header Color",
  "background_color",
  "#FFF",
  ".remark-slide-content",
  "Slide Background Color",
  "link_color",
  "rgb(249, 38, 114)",
  "a, a > code",
  "Link Color",
  "text_bold_color",
  NULL,
  "strong",
  "Bold Text Color",
  "text_slide_number_color",
  "{inverse_background_color}",
  ".remark-slide-number",
  "Slide Number Color",
  "padding",
  "1rem 4rem 1rem 4rem",
  ".remark-slide-content",
  "Slide Padding in `top right [bottom left]` format",
  "background_image",
  NULL,
  ".remark-slide-content",
  "Background image applied to each *and every* slide. Set `title_slide_background_image = \"none\"` to remove the background image from the title slide",
  "background_size",
  NULL,
  ".remark-slide-content",
  "Background image size, requires `background_image` to be set. If `background_image` is set, `background_size` will default to `cover` so the backround fills the screen. If both `background_image` and `background_position` are set, will default to 100 percent",
  "background_position",
  NULL,
  ".remark-slide-content",
  "Background image position, requires `background_image` to be set, and it is recommended to adjust `background_size`",
  "code_highlight_color",
  "rgba(255,255,0,0.5)",
  ".remark-code-line-highlighted",
  "Code Line Highlight",
  "code_inline_color",
  "#000",
  ".remark-inline-code",
  "Inline Code Color",
  "code_inline_background_color",
  NULL,
  ".remark-inline-code",
  "Inline Code Background Color",
  "code_inline_font_size",
  "1em",
  ".remark-inline-code",
  "Inline Code Text Font Size",
  "inverse_background_color",
  "#272822",
  ".inverse",
  "Inverse Background Color",
  "inverse_text_color",
  "#d6d6d6",
  ".inverse",
  "Inverse Text Color",
  "inverse_text_shadow",
  "{FALSE}",
  ".inverse",
  "Enables Shadow on text of inverse slides",
  "inverse_header_color",
  "#f3f3f3",
  ".inverse h1, .inverse h2, .inverse h3",
  "Inverse Header Color",
  "title_slide_text_color",
  "{inverse_text_color}",
  ".title-slide",
  "Title Slide Text Color",
  "title_slide_background_color",
  "{inverse_background_color}",
  ".title-slide",
  "Title Slide Background Color",
  "title_slide_background_image",
  NULL,
  ".title-slide",
  "Title Slide Background Image URL",
  "title_slide_background_size",
  NULL,
  ".title-slide",
  "Title Slide Background Image Size, defaults to \"cover\" if background image is set",
  "title_slide_background_position",
  NULL,
  ".title-slide",
  "Title Slide Background Image Position",
  "footnote_color",
  NULL,
  ".footnote",
  "Footnote text color (if `NA`, then it will be the same color as `text_color`)",
  "footnote_font_size",
  "0.9em",
  ".footnote",
  "Footnote font size",
  "footnote_position_bottom",
  "3em",
  ".footnote",
  "Footnote location from bottom of screen",
  "left_column_subtle_color",
  "#777",
  ".left-column h2, .left-column h3",
  "Left Column Text (not last)",
  "left_column_selected_color",
  "#000",
  ".left-column h2:last-of-type, .left-column h3:last-child",
  "Left Column Current Selection",
  "blockquote_left_border_color",
  "lightgray",
  "blockquote",
  "Blockquote Left Border Color",
  "table_border_color",
  "#666",
  "table: border-top, border-bottom",
  "Table top/bottom border",
  "table_row_border_color",
  "#ddd",
  "table thead th: border-bottom",
  "Table row inner bottom border",
  "table_row_even_background_color",
  "#eee",
  "thead, tfoot, tr:nth-child(even)",
  "Table Even Row Background Color",
  "text_font_size",
  "20px",
  ".remark-slide-content",
  "Slide Body Text Font Size",
  "header_h1_font_size",
  "55px",
  ".remark-slide-content h1",
  "h1 Header Text Font Size",
  "header_h2_font_size",
  "45px",
  ".remark-slide-content h2",
  "h2 Header Text Font Size",
  "header_h3_font_size",
  "35px",
  ".remark-slide-content h3",
  "h3 Header Text Font Size",
  "header_background_auto",
  "{FALSE}",
  "",
  "Add background under slide title automatically for h1 header elements. If not enabled, use `class: header_background` to enable",
  "header_background_color",
  "{header_color}",
  ".remark-slide-content h1",
  "Background Color for h1 Header with Background",
  "header_background_text_color",
  "{background_color}",
  ".remark-slide-content h1",
  "Text Color for h1 Header with Background",
  "header_background_padding",
  "2rem 4rem 1.5rem 4rem",
  ".remark-slide-content h1",
  "Padding for h1 Header with Background",
  "header_background_content_padding_top",
  "7rem",
  ".remark-slide-content",
  "Top Padding for Content in Slide with Header with Background",
  "header_background_ignore_classes",
  "{c('normal', 'inverse', 'title', 'middle', 'bottom')}",
  ".remark-slide-content",
  "Slide Classes Where Header with Background will not be Applied",
  "text_slide_number_font_size",
  "0.9em",
  ".remark-slide-number",
  "Slide Number Text Font Size",
  "text_font_google",
  NULL,
  "body",
  "Use `google_font()` to specify body font",
  "text_font_family",
  "'Droid Serif'",
  "body",
  "Body Text Font Family",
  "text_font_weight",
  "normal",
  "body",
  "Body Text Font Weight",
  "text_font_url",
  "https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic",
  "@import url()",
  "Body Text Font URL(s)",
  "text_font_family_fallback",
  "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
  "body",
  "Body Text Font Fallbacks",
  "text_font_base",
  "serif",
  "body",
  "Body Text Base Font (Total Failure Fallback)",
  "header_font_google",
  NULL,
  "body",
  "Use `google_font()` to specify header font",
  "header_font_family",
  "'Yanone Kaffeesatz'",
  "h1, h2, h3",
  "Header Font Family",
  "header_font_weight",
  "normal",
  "h1, h2, h3",
  "Header Font Weight",
  "header_font_url",
  "https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz",
  "@import url",
  "Header Font URL",
  "code_font_google",
  NULL,
  "body",
  "Use `google_font()` to specify code font",
  "code_font_family",
  "'Source Code Pro'",
  ".remark-code, .remark-inline-code",
  "Code Font Family",
  "code_font_size",
  "0.9em",
  ".remark-inline",
  "Code Text Font Size",
  "code_font_url",
  "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700",
  "@import url",
  "Code Font URL",
  "code_font_family_fallback",
  "'Lucida Console', Monaco",
  ".remark-code, .remark-inline-code",
  "Code Font Fallback"
)

set_default <- function(tv, ...) {
  vars <- c(...)
  for (var in names(vars)) {
    tv[tv$variable == var, "default"] <- vars[var]
  }
  tv
}

template_mono_light <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "base_color",
  "#23395b",
  "multiple",
  "Monotone base color, works best with a strong color",
  "white_color",
  "{lighten_color(base_color, 0.9)}",
  "multiple",
  "Brightest color used, default is a very light version of `base_color`",
  "black_color",
  "{darken_color(base_color, 0.3)}",
  "multiple",
  "Darkest color used, default is a very dark, version of `base_color`"
)
template_mono_light <- do.call("rbind", list(template_mono_light, template_variables))
template_mono_light <- set_default(
  template_mono_light,
  text_color = "{black_color}",
  header_color = "{base_color}",
  background_color = "{white_color}",
  link_color = "{base_color}",
  text_bold_color = "{base_color}",
  text_slide_number_color = "{base_color}",
  code_inline_color = "{base_color}",
  inverse_background_color = "{base_color}",
  inverse_text_color = "{white_color}",
  inverse_header_color = "{white_color}",
  left_column_subtle_color = "{apply_alpha(base_color, 0.6)}",
  left_column_selected_color = "{base_color}",
  blockquote_left_border_color = "{apply_alpha(base_color, 0.5)}",
  table_row_even_background_color = "{lighten_color(base_color, 0.8)}"
)

template_mono_dark <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "base_color",
  "#cbf7ed",
  "multiple",
  "Monotone Base Color, works best with a light color.",
  "white_color",
  "{lighten_color(base_color, 0.8)}",
  "multiple",
  "Brightest color used, default is a very light version of `base_color`",
  "black_color",
  "{darken_color(base_color, 0.85)}",
  "multiple",
  "Darkest color used, default is a very dark, version of `base_color`"
)
template_mono_dark <- do.call("rbind", list(template_mono_dark, template_variables))
template_mono_dark <- set_default(
  template_mono_dark,
  text_color = "{white_color}",
  header_color = "{base_color}",
  background_color = "{black_color}",
  link_color = "{base_color}",
  text_bold_color = "{base_color}",
  text_slide_number_color = "{base_color}",
  code_inline_color = "{base_color}",
  inverse_background_color = "{base_color}",
  inverse_text_color = "{black_color}",
  inverse_header_color = "{black_color}",
  left_column_subtle_color = "{apply_alpha(base_color, 0.6)}",
  left_column_selected_color = "{base_color}",
  blockquote_left_border_color = "{apply_alpha(base_color, 0.5)}",
  table_row_even_background_color = "{darken_color(base_color, 0.7)}"
)

template_mono_accent <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "base_color",
  "#43418A",
  "multiple",
  "Monotone Base Color, works best with a strong color",
  "white_color",
  "#FFFFFF",
  "multiple",
  "Brightest color used",
  "black_color",
  "#272822",
  "multiple",
  "Darkest color used"
)
template_mono_accent <- do.call("rbind", list(template_mono_accent, template_variables))
template_mono_accent <- set_default(
  template_mono_accent,
  text_color = "{black_color}",
  header_color = "{base_color}",
  background_color = "{white_color}",
  link_color = "{base_color}",
  text_bold_color = "{base_color}",
  text_slide_number_color = "{base_color}",
  code_inline_color = "{base_color}",
  inverse_background_color = "{base_color}",
  inverse_text_color = "{white_color}",
  inverse_header_color = "{white_color}",
  left_column_subtle_color = "{apply_alpha(base_color, 0.6)}",
  left_column_selected_color = "{base_color}",
  blockquote_left_border_color = "{apply_alpha(base_color, 0.5)}",
  table_row_even_background_color = "{lighten_color(base_color, 0.7)}"
)

template_mono_accent_inverse <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "base_color",
  "#3C989E",
  "multiple",
  "Monotone Base Color, works best with a light color",
  "white_color",
  "#FFFFFF",
  "multiple",
  "Brightest color used, default is a very light version of `base_color`",
  "black_color",
  "{darken_color(base_color, 0.9)}",
  "multiple",
  "Darkest color used, default is a very dark, version of `base_color`"
)
template_mono_accent_inverse <- do.call("rbind", list(template_mono_accent_inverse, template_variables))
template_mono_accent_inverse <- set_default(
  template_mono_accent_inverse,
  text_color = "{white_color}",
  header_color = "{base_color}",
  background_color = "{black_color}",
  link_color = "{base_color}",
  text_bold_color = "{base_color}",
  text_slide_number_color = "{base_color}",
  code_inline_color = "{base_color}",
  inverse_background_color = "{base_color}",
  inverse_text_color = "{black_color}",
  inverse_header_color = "{black_color}",
  left_column_subtle_color = "{apply_alpha(base_color, 0.6)}",
  left_column_selected_color = "{base_color}",
  blockquote_left_border_color = "{apply_alpha(base_color, 0.5)}",
  table_row_even_background_color = "{darken_color(base_color, 0.7)}"
)

template_duo_light <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "primary_color",
  "#1F4257",
  "multiple",
  "Duotone Secondary Color",
  "secondary_color",
  "#F97B64",
  "multiple",
  "Duotone Primary Color",
  "white_color",
  "{lighten_color(primary_color, 0.99)}",
  "multiple",
  "Brightest color used, default is a very light version of `primary_color`",
  "black_color",
  "{darken_color(secondary_color, 0.9)}",
  "multiple",
  "Darkest color used, default is a very dark version of `secondary_color`"
)
template_duo_light <- do.call("rbind", list(template_duo_light, template_variables))
template_duo_light <- set_default(
  template_duo_light,
  text_color = "{black_color}",
  header_color = "{primary_color}",
  background_color = "{white_color}",
  link_color = "{secondary_color}",
  text_bold_color = "{secondary_color}",
  text_slide_number_color = "{primary_color}",
  code_inline_color = "{secondary_color}",
  inverse_background_color = "{primary_color}",
  inverse_text_color = "{secondary_color}",
  inverse_header_color = "{secondary_color}",
  left_column_subtle_color = "{apply_alpha(secondary_color, 0.6)}",
  left_column_selected_color = "{secondary_color}",
  blockquote_left_border_color = "{apply_alpha(secondary_color, 0.5)}",
  table_row_even_background_color = "{lighten_color(secondary_color, 0.7)}"
)

template_duo <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "primary_color",
  "#1F4257",
  "multiple",
  "Duotone Primary Color",
  "secondary_color",
  "#F97B64",
  "multiple",
  "Duotone Secondary Color"
)
template_duo <- do.call("rbind", list(template_duo, template_variables))
template_duo <- set_default(
  template_duo,
  text_color = "{choose_dark_or_light(primary_color, darken_color(primary_color, 0.9), lighten_color(secondary_color, 0.99))}",
  header_color = "{secondary_color}",
  background_color = "{primary_color}",
  link_color = "{secondary_color}",
  text_bold_color = "{secondary_color}",
  text_slide_number_color = "{text_color}",
  code_inline_color = "{secondary_color}",
  inverse_background_color = "{secondary_color}",
  inverse_text_color = "{primary_color}",
  inverse_header_color = "{primary_color}",
  title_slide_text_color = "{secondary_color}",
  title_slide_background_color = "{primary_color}",
  left_column_subtle_color = "{apply_alpha(secondary_color, 0.6)}",
  left_column_selected_color = "{secondary_color}",
  blockquote_left_border_color = "{apply_alpha(secondary_color, 0.5)}",
  table_row_even_background_color = "{lighten_color(primary_color, 0.3)}"
)

template_duo_accent <- tibble::tribble(
  ~variable,
  ~default,
  ~element,
  ~description,
  "primary_color",
  "#006747",
  "multiple",
  "Duotone Primary Color",
  "secondary_color",
  "#CFC493",
  "multiple",
  "Duotone Secondary Color",
  "white_color",
  "#FFFFFF",
  "multiple",
  "Brightest color used",
  "black_color",
  "#000000",
  "multiple",
  "Darkest color used"
)
template_duo_accent <- do.call("rbind", list(template_duo_accent, template_variables))
template_duo_accent <- set_default(
  template_duo_accent,
  text_color = "{black_color}",
  header_color = "{primary_color}",
  background_color = "{white_color}",
  link_color = "{choose_dark_or_light(secondary_color, primary_color, secondary_color)}",
  text_bold_color = "{choose_dark_or_light(secondary_color, primary_color, secondary_color)}",
  text_slide_number_color = "{primary_color}",
  code_inline_color = "{choose_dark_or_light(secondary_color, primary_color, secondary_color)}",
  inverse_background_color = "{secondary_color}",
  inverse_text_color = "{choose_dark_or_light(secondary_color, black_color, white_color)}",
  inverse_header_color = "{choose_dark_or_light(secondary_color, black_color, white_color)}",
  title_slide_background_color = "{primary_color}",
  title_slide_text_color = "{choose_dark_or_light(primary_color, black_color, white_color)}",
  left_column_subtle_color = "{apply_alpha(primary_color, 0.6)}",
  left_column_selected_color = "{primary_color}",
  blockquote_left_border_color = "{apply_alpha(secondary_color, 0.5)}",
  table_row_even_background_color = "{lighten_color(secondary_color, 0.3)}"
)

template_duo_accent_inverse <- set_default(
  template_duo_accent,
  text_color = "{white_color}",
  header_color = "{primary_color}",
  background_color = "{black_color}",
  link_color = "{choose_dark_or_light(secondary_color, secondary_color, primary_color)}",
  text_bold_color = "{choose_dark_or_light(secondary_color, secondary_color, primary_color)}",
  text_slide_number_color = "{primary_color}",
  code_inline_color = "{choose_dark_or_light(secondary_color, secondary_color, primary_color)}",
  inverse_background_color = "{secondary_color}",
  inverse_text_color = "{choose_dark_or_light(secondary_color, black_color, white_color)}",
  inverse_header_color = "{choose_dark_or_light(secondary_color, black_color, white_color)}",
  title_slide_background_color = "{primary_color}",
  title_slide_text_color = "{choose_dark_or_light(primary_color, black_color, white_color)}",
  left_column_subtle_color = "{apply_alpha(primary_color, 0.6)}",
  left_column_selected_color = "{primary_color}",
  blockquote_left_border_color = "{apply_alpha(secondary_color, 0.5)}",
  table_row_even_background_color = "{darken_color(choose_dark_or_light(primary_color, secondary_color, primary_color), 0.3)}"
)

solarized <- list(
  "base03" = "#002b36",
  "base02" = "#073642",
  "base01" = "#586e75",
  "base00" = "#657b83",
  "base0" = "#839496",
  "base1" = "#93a1a1",
  "base2" = "#eee8d5",
  "base3" = "#fdf6e3",
  "yellow" = "#b58900",
  "orange" = "#cb4b16",
  "red" = "#dc322f",
  "magenta" = "#d33682",
  "violet" = "#6c71c4",
  "blue" = "#268bd2",
  "cyan" = "#2aa198",
  "green" = "#859900"
)


template_solarized_light <- set_default(
  template_variables,
  text_color = solarized$base00,
  header_color = solarized$red,
  background_color = solarized$base3,
  link_color = solarized$yellow,
  text_bold_color = solarized$magenta,
  text_slide_number_color = solarized$base1,
  code_highlight_color = "#268bd240",
  # xaringanthemer:::apply_alpha(solarized$blue, 0.25)
  code_inline_color = solarized$violet,
  inverse_background_color = solarized$base03,
  inverse_text_color = solarized$base3,
  inverse_header_color = "{inverse_text_color}",
  title_slide_text_color = "{inverse_text_color}",
  title_slide_background_color = "{inverse_background_color}",
  left_column_subtle_color = solarized$base1,
  left_column_selected_color = solarized$base01,
  blockquote_left_border_color = solarized$orange,
  table_border_color = solarized$base0,
  table_row_border_color = solarized$base0,
  table_row_even_background_color = solarized$base2
)

template_solarized_dark <- set_default(
  template_variables,
  text_color = solarized$base0,
  header_color = solarized$red,
  background_color = solarized$base03,
  link_color = solarized$yellow,
  text_bold_color = solarized$magenta,
  text_slide_number_color = solarized$base01,
  code_highlight_color = "#268bd240",
  # xaringanthemer:::apply_alpha(solarized$blue, 0.25)
  code_inline_color = solarized$violet,
  inverse_background_color = solarized$base3,
  inverse_text_color = solarized$base03,
  inverse_header_color = "{inverse_text_color}",
  title_slide_text_color = "{inverse_text_color}",
  title_slide_background_color = "{inverse_background_color}",
  left_column_subtle_color = solarized$base01,
  left_column_selected_color = solarized$base1,
  blockquote_left_border_color = solarized$orange,
  table_border_color = solarized$base00,
  table_row_border_color = solarized$base00,
  table_row_even_background_color = solarized$base02
)


# Theme Generating Helpers ----------------------------------------------


plural_element <- function(css_name) {
  is_mult <- grepl(",|and|or", css_name)
  is_class <- grepl("^\\.", css_name)
  ifelse(
    is_class,
    ifelse(is_mult, "classes", "class"),
    ifelse(is_mult, "elements", "element")
  )
}

element_description <- function(element) {
  out <- rep("", length(element))
  multiple <- grepl("multiple", element)
  out[multiple] <- "Modifies multiple CSS classes or elements."

  ifelse(
    multiple | is.na(element) | element == "",
    out,
    glue::glue("Modifies the `{element}` {plural_element(element)}.")
  )
}