vim.o.termguicolors = false
vim.o.background = "dark"

vim.cmd.highlight("clear")
if vim.g.syntax_on then
  vim.cmd.syntax("reset")
end

vim.g.colors_name = "simple"

local hi = vim.api.nvim_set_hl

-- Core syntex groups
hi(0, "Comment", { ctermfg = "Gray" })
hi(0, "Constant", { ctermfg = 146 })
hi(0, "String", { ctermfg = 146 })
hi(0, "Identifier", { ctermfg = "White" })
hi(0, "Function", { ctermfg = "White" })
hi(0, "Statement", { ctermfg = "Yellow" })
hi(0, "Type", { ctermfg = "LightGreen" })
hi(0, "Special", {})
hi(0, "Delimiter", { ctermfg = "White" })
hi(0, "Operator", { ctermfg = "White" })
hi(0, "Todo", { ctermfg = "Red", bold = true })

-- Editor UI
hi(0, "LineNr", { ctermfg = "DarkGray" })
hi(0, "CursorLine", { ctermbg = 8 })
hi(0, "CursorLineNr", { link = "LineNr" })
hi(0, "Visual", { ctermbg = 8 })
hi(0, "MatchParen", { bold = true, underline = true })
hi(0, "SpecialKey", { ctermfg = "DarkGray" })
hi(0, "NonText", { ctermfg = "DarkGray" })
hi(0, "EndOfBuffer", {})
hi(0, "Title", { bold = true })
hi(0, "Directory", { ctermfg = "LightCyan" })
hi(0, "NormalFloat", { ctermbg = "Black" })
hi(0, "Search", { ctermbg = "Magenta", ctermfg = "Black" })

-- Windows and status
hi(0, "WinSeparator", { ctermfg = "Black", ctermbg = "Black" })
hi(0, "StatusLine", { ctermbg = "Black" })
hi(0, "StatusLineNC", { ctermbg = "Black" })
hi(0, "TabLine", { ctermbg = "Black" })
hi(0, "TabLineFill", { ctermbg = "Black" })
hi(0, "TabLineSel", {})

-- Folding and signs
hi(0, "Folded", { ctermfg = "Gray", ctermbg = "Black" })
hi(0, "FoldColumn", { ctermfg = "Gray" })
hi(0, "SignColumn", { ctermfg = "Gray" })

-- Messages
hi(0, "ModeMsg", {})
hi(0, "MoreMsg", { ctermfg = "LightGreen" })
hi(0, "Question", { ctermfg = "LightGreen" })
hi(0, "ErrorMsg", { ctermfg = "DarkRed" })
hi(0, "WarningMsg", { ctermfg = "DarkYellow" })
hi(0, "WildMenu", { ctermfg = "Black", ctermbg = "Yellow" })

-- Completion menu
hi(0, "Pmenu", { ctermbg = 8 })
hi(0, "PmenuSel", { ctermbg = "White", ctermfg = "Black" })
hi(0, "PmenuMatch", { ctermbg = 8, bold = true })
hi(0, "PmenuMatchSel", { ctermbg = "White", ctermfg = "Black", bold = true })
hi(0, "PmenuThumb", { ctermbg = "White" })
hi(0, "PmenuSbar", { ctermbg = "Gray" })

-- -- Diff
-- hi(0, "DiffAdd", { ctermfg = "Black", ctermbg = "DarkGreen" })
-- hi(0, "DiffChange", { ctermbg = 8 })
-- hi(0, "DiffDelete", { ctermfg = "Red", bold = true })
-- hi(0, "DiffText", { ctermfg = "Black", ctermbg = "DarkCyan" })
-- hi(0, "Changed", { ctermfg = "Blue" })

-- Diff
hi(0, "DiffAdd", { ctermbg = 22 })
hi(0, "DiffChange", { ctermbg = 8 })
hi(0, "DiffDelete", { ctermfg = "Red", bold = true })
hi(0, "DiffText", { ctermbg = 26 })
hi(0, "Changed", { ctermfg = "Blue" })

-- Diagnostics
hi(0, "DiagnosticInfo", { ctermfg = "DarkBlue" })
hi(0, "DiagnosticHint", { ctermfg = "LightGray" })
hi(0, "DiagnosticVirtualTextError", { ctermfg = "DarkGray" })
hi(0, "DiagnosticVirtualTextWarn", { ctermfg = "DarkGray" })
hi(0, "DiagnosticVirtualTextInfo", { ctermfg = "DarkGray" })
hi(0, "DiagnosticVirtualTextHint", { ctermfg = "DarkGray" })
hi(0, "DiagnosticVirtualTextOk", { ctermfg = "DarkGray" })

-- QuickFix
hi(0, "QuickFixLine", { ctermfg = "Black", ctermbg = "Yellow" })

-- Filetype: mail
hi(0, "mailQuoted1", { ctermfg = "DarkCyan" })
hi(0, "mailQuoted2", { ctermfg = "DarkCyan" })
hi(0, "mailQuoted3", { ctermfg = "DarkCyan" })
hi(0, "mailQuoted4", { ctermfg = "DarkCyan" })
hi(0, "mailQuoted5", { ctermfg = "DarkCyan" })
hi(0, "mailQuoted6", { ctermfg = "DarkCyan" })

-- Treesitter
hi(0, "@module", { ctermfg = "White" })
hi(0, "@variable", { ctermfg = "White" })
hi(0, "@type.builtin", { link = "Type" })

-- Treesitter: comments
hi(0, "@comment.error.comment", { link = "Todo" })
hi(0, "@comment.warning.comment", { link = "Todo" })
hi(0, "@comment.note.comment", { link = "Todo" })
hi(0, "@number.comment", {})
hi(0, "@constant.comment", {})
hi(0, "@string.special.url.comment", {})
hi(0, "@punctuation.delimiter.comment", { link = "Todo" })
hi(0, "@punctuation.bracket.comment", {})

-- Treesitter: markdown
-- TODO: remove .markdown?
hi(0, "@markup.link.markdown_inline", {})
hi(0, "@markup.link.label.markdown", {})
hi(0, "@markup.link.label.markdown_inline", { ctermfg = 2 })
hi(0, "@markup.link.url.markdown", { ctermfg = 2 })
hi(0, "@markup.link.url.markdown_inline", { ctermfg = 2 })
hi(0, "@markup.raw.block.markdown", { link = "Comment" })
hi(0, "@markup.raw.markdown_inline", { link = "Comment" })
hi(0, "@label.markdown", { link = "@markup.raw.block.markdown" })
hi(0, "@markup.quote", { ctermfg = "DarkCyan" })

-- Custom matches
hi(0, "TrailingWhitespace", { ctermbg = 88 })
hi(0, "GitConflictMarker", { ctermfg = 245 })
hi(0, "MarkdownMath", { ctermfg = 146 })