local c = require("gruber-darker.palette")
local config = require("gruber-darker.config").get_resolved_opts()

local M = {}

local groups = {
	Comment = { fg = c.default.brown:to_string(), italic = config.comment_italics and config.italic }, -- any comment
	ColorColumn = { bg = c.default["bg+2"]:to_string() }, -- used for the columns set with 'colorcolumn'
	Conceal = { fg = c.default.fg:to_string(), bg = c.default.bg:to_string() }, -- placeholder characters substituted for concealed text (see 'conceallevel')
	Cursor = { bg = c.default.yellow:to_string() }, -- character under the cursor
	lCursor = { fg = c.default.none:to_string(), bg = c.default.yellow:to_string() }, -- the character under the cursor when |language-mapping| is used (see 'guicursor')
	CursorIM = { fg = c.default.none:to_string(), bg = c.default.yellow:to_string() }, -- like Cursor, but used when in IME mode |CursorIM|
	CursorColumn = { bg = c.default["bg+2"]:to_string() }, -- Screen-column at the cursor, when 'cursorcolumn' is set.
	CursorLine = { bg = c.default["bg+1"]:to_string() }, -- Screen-line at the cursor, when 'cursorline' is set.  Low-priority if foreground (ctermfg OR guifg) is not set.
	-- Directory = { fg = c.default.lightblue:to_string() }, -- directory names (and other special names in listings)
	DiffAdd = { fg = c.default.green:to_string(), bg = c.default.none:to_string() }, -- diff mode: Added line |diff.txt|
	DiffChange = { fg = c.default.yellow:to_string(), bg = c.default.none:to_string() }, -- diff mode: Changed line |diff.txt|
	DiffDelete = { fg = c.default["red+1"]:to_string(), bg = c.default.none:to_string() }, -- diff mode: Deleted line |diff.txt|
	DiffText = { fg = c.default.yellow:to_string(), bg = c.default.none:to_string() }, -- diff mode: Changed text within a changed line |diff.txt|
	EndOfBuffer = { fg = c.default.fg:to_string(), bg = c.default.bg:to_string() }, -- filler lines (~) after the end of the buffer.  By default, this is highlighted like |hl-NonText|.
	TermCursor = { bg = c.default.yellow:to_string() }, -- cursor in a focused terminal
	-- TermCursorNC= { }, -- cursor in an unfocused terminal
	ErrorMsg = { fg = c.default.white:to_string(), bg = c.default.red:to_string() }, -- error messages on the command line
	VertSplit = { fg = c.default["fg+2"]:to_string(), bg = c.default["bg+1"]:to_string() }, -- the column separating vertically split windows
	WinSeparator = { fg = c.default["bg+2"]:to_string(), bold = config.bold }, -- the column separating vertically split windows
	Folded = { fg = c.default.brown:to_string(), bg = c.default["fg+2"]:to_string(), italic = true }, -- line used for closed folds
	FoldColumn = { fg = c.default.brown:to_string(), bg = c.default["fg+2"]:to_string() }, -- 'foldcolumn'
	SignColumn = { fg = c.default["bg+2"]:to_string(), bg = c.default.none:to_string() }, -- column where |signs| are displayed
	-- SignColumnSB = { bg = c.bg_sidebar, fg = c.fg_gutter }, -- column where |signs| are displayed
	-- Substitute = { bg = c.red, fg = c.black }, -- |:substitute| replacement text highlighting
	LineNr = { fg = c.default["bg+4"]:to_string() }, -- Line number for ":number" and ":#" commands, and when 'number' or 'relativenumber' option is set.
	CursorLineNr = { fg = c.default.yellow:to_string() }, -- Like LineNr when 'cursorline' or 'relativenumber' is set for the cursor line.
	MatchParen = { fg = c.default.fg:to_string(), bg = c.default.wisteria:to_string() }, -- The character under the cursor or just before it, if it is a paired bracket, and its match. |pi_paren.txt|
	ModeMsg = { fg = c.default["fg+2"]:to_string() }, -- 'showmode' message (e.g., "-- INSERT -- ")
	-- MsgArea = { fg = c.fg_dark }, -- Area for messages and cmdline
	-- MsgSeparator= { }, -- Separator for scrolled messages, `msgsep` flag of 'display'
	MoreMsg = { fg = c.default["fg+2"]:to_string() }, -- |more-prompt|
	NonText = { fg = c.default["fg+2"]:to_string() }, -- '@' at the end of the window, characters from 'showbreak' and other characters that do not really exist in the text (e.g., ">" displayed when a double-wide character doesn't fit at the end of the line). See also |hl-EndOfBuffer|.
	Normal = { fg = c.default.fg:to_string(), bg = c.default.bg:to_string() }, -- normal text
	NormalNC = { fg = c.default.fg:to_string(), bg = c.default.bg:to_string() }, -- normal text in non-current windows
	NormalSB = { fg = c.default.fg:to_string(), bg = c.default.bg:to_string() }, -- normal text in sidebar
	NormalFloat = { fg = c.default.fg:to_string(), bg = c.default.bg:to_string() }, -- Normal text in floating windows.
	FloatBorder = { fg = c.default["bg+2"]:to_string(), bg = c.default["bg-1"]:to_string() },
	Pmenu = { fg = c.default.fg:to_string(), bg = c.default["bg+1"]:to_string() }, -- Popup menu: normal item.
	PmenuSel = { fg = c.default.fg:to_string(), bg = c.default["bg+2"]:to_string() }, -- Popup menu: selected item.
	PmenuSbar = { bg = c.default.bg:to_string() }, -- Popup menu: scrollbar.
	PmenuThumb = { bg = c.default.bg:to_string() }, -- Popup menu: Thumb of the scrollbar.
	Question = { fg = c.default.niagara:to_string() }, -- |hit-enter| prompt and yes/no questions
	QuickFixLine = { bg = c.default["bg+2"]:to_string(), bold = config.bold }, -- Current |quickfix| item in the quickfix window. Combined with |hl-CursorLine| when the cursor is there.
	Search = { fg = c.default.black:to_string(), bg = c.default.yellow:to_string() }, -- Last search pattern highlighting (see 'hlsearch').  Also used for similar items that need to stand out.
	IncSearch = { fg = c.default.black:to_string(), bg = c.default["fg+2"]:to_string() }, -- 'incsearch' highlighting; also used for the text replaced with ":s///c"
	CurSearch = { link = "IncSearch" },
	SpecialKey = { fg = c.default["fg+2"]:to_string() }, -- Unprintable characters: text displayed differently from what it really is.  But not 'listchars' whitespace. |hl-Whitespace|
	SpellBad = { undercurl = true }, -- Word that is not recognized by the spellchecker. |spell| Combined with the highlighting used otherwise.
	SpellCap = { undercurl = true }, -- Word that should start with a capital. |spell| Combined with the highlighting used otherwise.
	SpellLocal = { undercurl = true }, -- Word that is recognized by the spellchecker as one that is used in another region. |spell| Combined with the highlighting used otherwise.
	SpellRare = { undercurl = true }, -- Word that is recognized by the spellchecker as one that is hardly ever used.  |spell| Combined with the highlighting used otherwise.
	StatusLine = { fg = c.default.white:to_string(), bg = c.default["bg+1"]:to_string() }, -- status line of current window
	StatusLineNC = { fg = c.default.quartz:to_string(), bg = c.default["bg+1"]:to_string() }, -- status lines of not-current windows Note: if this is equal to "StatusLine" Vim will use "^^^" in the status line of the current window.
	TabLine = { bg = c.default.none:to_string() }, -- tab pages line, not active tab page label
	TabLineFill = { fg = c.default["bg+4"]:to_string(), bg = c.default["bg+1"]:to_string() }, -- tab pages line, where there are no labels
	TabLineSel = { fg = c.default.yellow:to_string(), bg = c.default.none:to_string(), bold = config.bold }, -- tab pages line, active tab page label
	Title = { fg = c.default.quartz:to_string() }, -- titles for output from ":set all", ":autocmd" etc.
	Visual = { bg = c.default["bg+2"]:to_string() }, -- Visual mode selection
	VisualNOS = { fg = c.default.red:to_string() }, -- Visual mode selection when vim is "Not Owning the Selection".
	WarningMsg = { fg = c.default.red:to_string() }, -- warning messages
	Whitespace = { fg = c.default["bg+4"]:to_string(), bg = c.default.none:to_string() }, -- "nbsp", "space", "tab" and "trail" in 'listchars'
	WildMenu = { fg = c.default.black:to_string(), bg = c.default.yellow:to_string() }, -- current match in 'wildmenu' completion
	-- These groups are not listed as default vim groups,
	-- but they are defacto standard group names for syntax highlighting.
	-- commented out groups should chain up to their "preferred" group by
	-- default,
	-- Uncomment and edit if you want more specific syntax highlighting.

	Constant = { fg = c.default.quartz:to_string() }, -- (preferred) any constant
	String = { fg = c.default.green:to_string() }, --   a string constant: "this is a string"
	Character = { fg = c.default.green:to_string() }, --  a character constant: 'c', '\n'
	Number = { fg = c.default.fg:to_string() }, --   a number constant: 234, 0xff
	Boolean = { fg = c.default.yellow:to_string(), bold = config.bold }, --  a boolean constant: TRUE, false
	Float = { fg = c.default.yellow:to_string(), bold = config.bold }, --    a floating point constant: 2.3e10
	Identifier = { fg = c.default["fg+1"]:to_string() }, -- (preferred) any variable name
	Function = { fg = c.default.niagara:to_string() }, -- function name (also: methods for classes)
	Statement = { fg = c.default.yellow:to_string() }, -- (preferred) any statement
	Conditional = { fg = c.default.yellow:to_string(), bold = config.bold }, --  if, then, else, endif, switch, etc.
	Repeat = { fg = c.default.yellow:to_string(), bold = config.bold }, --   for, do, while, etc.
	Label = { fg = c.default.yellow:to_string(), bold = config.bold }, --    case, default, etc.
	Operator = { fg = c.default.yellow:to_string() }, -- "sizeof", "+", "*", etc.
	Keyword = { fg = c.default.yellow:to_string(), bold = config.bold }, --  any other keyword
	Exception = { fg = c.default.yellow:to_string(), bold = config.bold }, --  try, catch, throw
	PreProc = { fg = c.default.quartz:to_string() }, -- (preferred) generic Preprocessor
	Include = { fg = c.default.quartz:to_string() }, --  preprocessor #include
	Define = { fg = c.default.quartz:to_string() }, --   preprocessor #define
	Macro = { fg = c.default.quartz:to_string() }, --    same as Define
	PreCondit = { fg = c.default.quartz:to_string() }, --  preprocessor #if, #else, #endif, etc.
	Type = { fg = c.default.quartz:to_string() }, -- (preferred) int, long, char, etc.
	StorageClass = { fg = c.default.yellow:to_string(), bold = config.bold }, -- static, register, volatile, etc.
	Structure = { fg = c.default.yellow:to_string(), bold = config.bold }, --  struct, union, enum, etc.
	Typedef = { fg = c.default.yellow:to_string(), bold = config.bold }, --  A typedef
	Special = { fg = c.default.yellow:to_string() }, -- (preferred) any special symbol
	-- SpecialChar   = { }, --  special character in a constant
	-- Tag           = { }, --    you can use CTRL-] on this
	-- Delimiter     = { }, --  character that needs attention
	-- SpecialComment= { }, -- special things inside a comment
	-- Debug = { fg = c.default["fg+2"]:to_string() }, --    debugging statements

	Underlined = { underline = config.underline }, -- (preferred) text that stands out, HTML links
	Bold = { bold = config.bold },
	Italic = { italic = config.italic },
	-- ("Ignore", below, may be invisible...)
	-- Ignore = { }, -- (preferred) left blank, hidden  |hl-Ignore|

	-- Error = { fg = c.error }, -- (preferred) any erroneous construct
	Todo = { fg = c.default.bg:to_string(), bg = c.default.yellow:to_string() }, -- (preferred) anything that needs extra attention; mostly the keywords TODO FIXME and XXX
	markdownHeadingDelimiter = { fg = c.default.niagara:to_string(), bold = config.bold },
	markdownCode = { fg = c.default.green:to_string() },
	markdownCodeBlock = { fg = c.default.green:to_string() },
	-- markdownH1 = { fg = c.magenta, bold = true },
	-- markdownH2 = { fg = c.blue, bold = true },
	-- markdownLinkText = { fg = c.blue, underline = true },
	markdownItalic = { fg = c.default.wisteria:to_string(), italic = config.italic },
	markdownBold = { fg = c.default.yellow:to_string(), bold = config.bold },
	markdownCodeDelimiter = { fg = c.default.brown:to_string(), italic = config.italic },
	markdownError = { fg = c.default.fg:to_string(), bg = c.default["bg+1"]:to_string() },
	-- These groups are for the neovim tree-sitter highlights.
	-- As of writing, tree-sitter support is a WIP, group names may change.
	-- By default, most of these groups link to an appropriate Vim group,
	-- TSError -> Error for example, so you do not have to define these unless
	-- you explicitly want to support Treesitter's improved syntax awareness.

	-- TSAnnotation        = { },    -- For C++/Dart attributes, annotations that can be attached to the code to denote some kind of meta information.
	-- TSAttribute         = { },    -- (unstable) TODO: docs
	TSBoolean = { fg = c.default.quartz:to_string() }, -- For booleans.
	TSCharacter = { fg = c.default.green:to_string() }, -- For characters.
	TSComment = { fg = c.default.brown:to_string() }, -- For comment blocks.
	-- TSNote = { fg = c.bg, bg = c.info },
	["@text.warning"] = { fg = c.default.red:to_string() },
	["@text.danger"] = { fg = c.default.white:to_string(), bg = c.default.red:to_string() },
	-- ["@constructor"] = { fg = c.magenta }, -- For constructor calls and definitions: `= { }` in Lua, and Java constructors.
	TSConditional = { fg = c.default.yellow:to_string() }, -- For keywords related to conditionnals.
	TSConstant = { fg = c.default.quartz:to_string() }, -- For constants
	-- TSConstBuiltin      = { },    -- For constant that are built in the language: `nil` in Lua.
	-- TSConstMacro        = { },    -- For constants that are defined by macros: `NULL` in C.
	-- TSError             = { },    -- For syntax/parser errors.
	-- TSException         = { },    -- For exception related keywords.
	-- ["@field"] = { fg = c.green1 }, -- For fields.
	-- TSFloat             = { },    -- For floats.
	-- TSFunction          = { },    -- For function (calls and definitions).
	-- TSFuncBuiltin       = { },    -- For builtin functions: `table.insert` in Lua.
	-- TSFuncMacro         = { },    -- For macro defined fuctions (calls and definitions): each `macro_rules` in Rust.
	-- TSInclude           = { },    -- For includes: `#include` in C, `use` or `extern crate` in Rust, or `require` in Lua.
	-- ["@keyword"] = { fg = c.purple, style = options.styles.keywords }, -- For keywords that don't fall in previous categories.
	-- ["@keyword.function"] = { fg = c.magenta, style = options.styles.functions }, -- For keywords used to define a fuction.
	-- ["@label"] = { fg = c.blue }, -- For labels: `label:` in C and `:label:` in Lua.
	-- TSMethod            = { },    -- For method calls and definitions.
	-- TSNamespace         = { },    -- For identifiers referring to modules and namespaces.
	-- TSNone              = { },    -- TODO: docs
	-- TSNumber            = { },    -- For all numbers
	-- ["@operator"] = { fg = c.blue5 }, -- For any operator: `+`, but also `->` and `*` in C.
	-- ["@parameter"] = { fg = c.yellow }, -- For parameters of a function.
	-- TSParameterReference= { },    -- For references to parameters of a function.
	-- ["@property"] = { fg = c.green1 }, -- Same as `TSField`.
	-- ["@punctuation.delimiter"] = { fg = c.blue5 }, -- For delimiters ie: `.`
	-- ["@punctuation.bracket"] = { fg = c.fg_dark }, -- For brackets and parens.
	-- ["@punctuation.special"] = { fg = c.blue5 }, -- For special punctutation that does not fall in the catagories before.
	TSRepeat = { fg = c.default.yellow:to_string() }, -- For keywords related to loops.
	TSString = { fg = c.default.green:to_string() }, -- For strings.
	-- ["@string.regex"] = { fg = c.blue6 }, -- For regexes.
	-- ["@string.escape"] = { fg = c.magenta }, -- For escape characters within a string.
	-- TSSymbol            = { },    -- For identifiers referring to symbols or atoms.
	TSType = { fg = c.default.quartz:to_string() }, -- For types.
	-- TSTypeBuiltin       = { },    -- For builtin types.
	-- ["@variable"] = { style = options.styles.variables }, -- Any variable name that does not have another highlight.
	-- ["@variable.builtin"] = { fg = c.red }, -- Variable names that are defined by the languages, like `this` or `self`.

	-- TSTag               = { },    -- Tags like html tag names.
	-- TSTagDelimiter      = { },    -- Tag delimiter like `<` `>` `/`
	-- TSText              = { },    -- For strings considered text in a markup language.
	-- ["@text.reference"] = { fg = c.teal },
	-- TSEmphasis          = { },    -- For text to be represented with emphasis.
	-- TSUnderline         = { },    -- For text to be represented with an underline.
	-- TSStrike            = { },    -- For strikethrough text.
	-- TSTitle             = { },    -- Text that is part of a title.
	-- TSLiteral           = { },    -- Literal text.
	TSURI = { fg = c.default.niagara:to_string(), underline = config.underline }, -- Any URI like a link or email.
	["@text.diff.add"] = { link = "DiffAdd" },
	["@text.diff.delete"] = { link = "DiffDelete" },
	["@text.diff.change"] = { link = "DiffChange" },
	-- Cmp
	-- CmpDocumentation = { link = "NormalFloat" },
	-- CmpDocumentationBorder = { link = "FloatBorder" },

	-- CmpItemAbbr = { fg = c.fg, bg = c.none },
	-- CmpItemAbbrDeprecated = { fg = c.fg_gutter, bg = c.none, strikethrough = true },
	-- CmpItemAbbrMatch = { fg = c.blue1, bg = c.none },
	-- CmpItemAbbrMatchFuzzy = { fg = c.blue1, bg = c.none },

	-- CmpItemMenu = { fg = c.default.white:to_string(), bg = c.default["bg+4"]:to_string() },

	-- CmpItemKindDefault = { fg = c.default.white:to_string(), bg = c.default["bg+4"]:to_string() },

	-- CmpItemKindKeyword = { fg = c.cyan, bg = c.none },

	-- CmpItemKindVariable = { fg = c.magenta, bg = c.none },
	-- CmpItemKindConstant = { fg = c.magenta, bg = c.none },
	-- CmpItemKindReference = { fg = c.magenta, bg = c.none },
	-- CmpItemKindValue = { fg = c.magenta, bg = c.none },

	-- CmpItemKindFunction = { fg = c.blue, bg = c.none },
	-- CmpItemKindMethod = { fg = c.blue, bg = c.none },
	-- CmpItemKindConstructor = { fg = c.blue, bg = c.none },

	-- CmpItemKindClass = { fg = c.orange, bg = c.none },
	-- CmpItemKindInterface = { fg = c.orange, bg = c.none },
	-- CmpItemKindStruct = { fg = c.orange, bg = c.none },
	-- CmpItemKindEvent = { fg = c.orange, bg = c.none },
	-- CmpItemKindEnum = { fg = c.orange, bg = c.none },
	-- CmpItemKindUnit = { fg = c.orange, bg = c.none },

	-- CmpItemKindModule = { fg = c.yellow, bg = c.none },

	-- CmpItemKindProperty = { fg = c.green1, bg = c.none },
	-- CmpItemKindField = { fg = c.green1, bg = c.none },
	-- CmpItemKindTypeParameter = { fg = c.green1, bg = c.none },
	-- CmpItemKindEnumMember = { fg = c.green1, bg = c.none },
	-- CmpItemKindOperator = { fg = c.green1, bg = c.none },
	-- CmpItemKindSnippet = { fg = c.dark5, bg = c.none },
}

---Set Neovim terminal colors
local function set_terminal_colors()
	-- terminal colors adapted from
	-- https://github.com/drsooch/gruber-darker-vim/blob/master/colors/GruberDarker.vim#L202
	vim.g.terminal_color_0 = c.default["bg+1"]:to_string()
	vim.g.terminal_color_8 = c.default["bg+1"]:to_string()

	vim.g.terminal_color_1 = c.default["red+1"]:to_string()
	vim.g.terminal_color_9 = c.default["red+1"]:to_string()

	vim.g.terminal_color_2 = c.default.green:to_string()
	vim.g.terminal_color_10 = c.default.green:to_string()

	vim.g.terminal_color_3 = c.default.yellow:to_string()
	vim.g.terminal_color_11 = c.default.yellow:to_string()

	vim.g.terminal_color_4 = c.default.niagara:to_string()
	vim.g.terminal_color_12 = c.default.niagara:to_string()

	vim.g.terminal_color_5 = c.default.wisteria:to_string()
	vim.g.terminal_color_13 = c.default.wisteria:to_string()

	vim.g.terminal_color_6 = c.default.niagara:to_string()
	vim.g.terminal_color_14 = c.default.niagara:to_string()

	vim.g.terminal_color_7 = c.default.fg:to_string()
	vim.g.terminal_color_15 = c.default.fg:to_string()

	vim.g.terminal_color_background = c.default["bg+1"]:to_string()
	vim.g.terminal_color_foreground = c.default.white:to_string()
end

---Highlights bootstrapper
function M.setup()
	set_terminal_colors()

	for group, hl in pairs(groups) do
		vim.api.nvim_set_hl(0, group, hl)
	end
end

return M