local util = require("monoglow.util")

local M = {}

---@type monoglow.HighlightsFn
function M.get(c, opts)
  return {
    -- editor:text
    Normal = { fg = c.fg, bg = opts.transparent and c.none or c.bg }, -- Normal text
    NormalNC = "Normal", -- Normal text in non-current windows
    Title = { fg = c.title }, -- Titles for output from ":set all", ":autocmd" etc.
    Whitespace = { fg = c.special.whitespace }, -- "nbsp", "space", "tab", "multispace", "lead" and "trail" in 'listchars'

    -- editor:nontext
    NonText = { fg = c.gray4 }, -- '@' at the end of the window, and characters from 'showbreak'

    -- editor:visual
    Visual = { bg = c.visual }, -- Visual mode selection
    VisualNOS = "Visual", -- Visual mode selection when Vim is "Not Owning the Selection"
    LspReferenceText = { bg = c.lsp_ref }, -- Used for highlighting "text" references

    -- editor:float
    NormalFloat = { fg = c.fg, bg = c.bg_popup }, -- Normal text in floating windows
    FloatBorder = { fg = c.border, bg = c.bg_popup }, -- Border of floating windows
    FloatTitle = { fg = c.title }, -- Title of floating windows

    -- editor:cursor
    Cursor = { fg = c.bg, bg = c.fg }, -- Character under the cursor
    CursorLine = { bg = c.cur_line }, -- Screen-line at the cursor
    CursorLineNr = { fg = c.cur_line_nr }, -- Like LineNr when 'cursorline' is set
    LineNr = { fg = c.fg_gutter }, -- Line number for ":number" and ":#" commands
    SignColumn = { bg = opts.transparent and c.none or c.bg }, -- Column where signs are displayed

    -- editor:search
    CurSearch = "IncSearch", -- Current search match under cursor
    IncSearch = { fg = c.black, bg = c.glow }, -- 'incsearch' highlighting; also used for ":s///c" replacement
    Search = { fg = c.glow, bold = true }, -- Last search pattern highlighting (see 'hlsearch')
    Substitute = "Search", -- :substitute replacement text highlighting

    -- editor:fold
    Folded = { fg = c.gray4 }, -- Line used for closed folds
    FoldColumn = { fg = c.gray4 }, -- 'foldcolumn'

    -- editor:diff
    DiffAdd = { fg = c.bg, bg = c.diff.add }, -- diff mode: Added line |diff.txt|
    DiffChange = { fg = c.bg, bg = c.diff.change }, -- diff mode: Changed line |diff.txt|
    DiffDelete = { fg = c.bg, bg = c.diff.delete }, -- diff mode: Deleted line |diff.txt|
    DiffText = { fg = c.bg, bg = c.diff.text }, -- diff mode: Changed text within a changed line |diff.txt|

    -- editor:menu
    Pmenu = { fg = c.fg, bg = opts.transparent and c.none or c.bg_menu }, -- Popup menu: normal item
    PmenuSel = { fg = c.black, bg = c.glow, bold = true }, -- Popup menu: selected item
    PmenuSbar = { fg = c.gray5, bg = c.gray3 }, -- Popup menu: scrollbar
    PmenuThumb = { fg = c.gray3, bg = c.gray5 }, -- Popup menu: Thumb of the scrollbar
    PmenuExtra = { fg = c.gray4 }, -- Popup menu: extra text (e.g. kind label)
    PmenuKind = { fg = c.cmp.kind }, -- Popup menu: kind icon/text

    -- editor:statusline
    StatusLine = { fg = c.fg_sidebar, bg = c.bg_statusline }, -- Status line of current window
    StatusLineNC = { fg = c.fg_gutter, bg = c.bg_statusline }, -- Status lines of not-current windows
    WinBar = "StatusLine", -- Window bar of current window
    WinBarNC = "StatusLineNC", -- Window bar of not-current windows

    -- editor:ui (other)
    EndOfBuffer = { fg = opts.eob and c.gray2 or c.bg }, -- Filler lines (~) after the end of the buffer
    WinSeparator = { fg = c.border }, -- Separator between window splits

    -- editor:misc
    Directory = { fg = c.fs.dir }, -- Directory names (and other special names in listings)

    -- syntax
    Conditional = "Keyword", -- if, then, else, endif, switch, etc.
    Exception = "Keyword", -- try, catch, throw, etc.
    Function = { fg = c.syntax.func_def, bold = opts.glow }, -- Function name (also: methods for classes)
    Identifier = { fg = c.syntax.type, bold = opts.glow }, -- Any variable name
    Keyword = { fg = c.syntax.keyword, bold = opts.glow }, -- Any other keyword
    Label = "Keyword", -- case, default, etc.
    PreProc = "Keyword", -- Generic Preprocessor
    Repeat = "Keyword", -- for, do, while, etc.
    Special = { fg = c.syntax.special }, -- Any special symbol
    Statement = "Keyword", -- Any statement
    Type = { fg = c.syntax.type }, -- int, long, char, etc.
    Variable = { fg = c.syntax.var }, -- Variable names (Vim9 script)

    -- syntax:constants
    Boolean = { fg = c.syntax.boolean }, -- true, false
    Character = "String", -- 'c', '\n'
    Constant = { fg = c.syntax.const }, -- Any constant
    Float = "Constant", -- Floating point constant: 2.3e10
    Number = "Constant", -- Numeric constant: 234, 0xff
    String = { fg = c.syntax.string }, -- String constant: "this is a string"

    -- syntax:punctuation
    Quote = "String", -- Quote characters around strings
    Operator = { fg = c.glow, bold = opts.glow }, -- "sizeof", "+", "*", etc.
    Delimiter = { fg = c.syntax.punctuation }, -- Character that needs attention

    -- syntax:comments
    Comment = { fg = c.syntax.comment, italic = true }, -- Any comment

    -- diagnostics
    DiagnosticError = { fg = c.error }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
    DiagnosticHint = { fg = c.hint }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
    DiagnosticInfo = { fg = c.info }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
    DiagnosticOk = { fg = c.ok }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default
    DiagnosticWarn = { fg = c.warning }, -- Used as the base highlight group. Other Diagnostic highlights link to this by default

    DiagnosticVirtualTextError = { bg = util.blend_bg(c.error, 0.1), fg = c.error }, -- Used for "Error" diagnostic virtual text
    DiagnosticVirtualTextHint = { bg = util.blend_bg(c.hint, 0.1), fg = c.hint }, -- Used for "Hint" diagnostic virtual text
    DiagnosticVirtualTextInfo = { bg = util.blend_bg(c.info, 0.1), fg = c.info }, -- Used for "Information" diagnostic virtual text
    DiagnosticVirtualTextOk = { bg = util.blend_bg(c.ok, 0.1), fg = c.ok }, -- Used for "Ok" diagnostic virtual text
    DiagnosticVirtualTextWarn = { bg = util.blend_bg(c.warning, 0.1), fg = c.warning }, -- Used for "Warning" diagnostic virtual text

    DiagnosticUnderlineError = { undercurl = true, sp = c.error }, -- Used to underline "Error" diagnostics
    DiagnosticUnderlineHint = { undercurl = true, sp = c.hint }, -- Used to underline "Hint" diagnostics
    DiagnosticUnderlineInfo = { undercurl = true, sp = c.info }, -- Used to underline "Information" diagnostics
    DiagnosticUnderlineOk = { undercurl = true, sp = c.ok }, -- Used to underline "Ok" diagnostics
    DiagnosticUnderlineWarn = { undercurl = true, sp = c.warning }, -- Used to underline "Warning" diagnostics

    -- webdevicon
    DevIconDefault = { fg = c.icon }, -- Default icon for nvim-web-devicons

    -- syntax:preproc (for non-TS users)
    Structure = "Type", -- struct, union, enum, etc.
    StorageClass = "Keyword", -- static, register, volatile, etc.
    Typedef = "Type", -- typedef
    Include = "Keyword", -- #include
    Define = "Keyword", -- #define
    Macro = "Keyword", -- Same as Define
    PreCondit = "Keyword", -- #if, #else, #endif, etc.

    -- syntax:special (for non-TS users)
    SpecialChar = "Special", -- Special character in a constant
    Tag = "Special", -- Can use CTRL-] on this
    Debug = "Special", -- Debugging statements
    SpecialComment = "Special", -- Special things inside a comment

    -- syntax:misc (for non-TS users)
    Underlined = { underline = true }, -- Text that stands out, HTML links
    Ignore = { fg = c.gray3 }, -- Left blank, hidden
    Error = { fg = c.error }, -- Any erroneous construct
    Todo = { fg = c.todo, bold = true }, -- TODO, FIXME, XXX, etc.

    -- diff:standard (used by @diff.plus/minus/delta via Nvim defaults)
    Added = { fg = c.diff.add }, -- Added line in a diff
    Changed = { fg = c.diff.change }, -- Changed line in a diff
    Removed = { fg = c.diff.delete }, -- Removed line in a diff

    -- editor:matching
    MatchParen = { fg = c.glow, bold = true }, -- Character under the cursor or just before it if matching

    -- editor:spell
    SpellBad = { undercurl = true, sp = c.error }, -- Word that is not recognized by the spellchecker
    SpellCap = { undercurl = true, sp = c.warning }, -- Word that should start with a capital
    SpellRare = { undercurl = true, sp = c.info }, -- Word that is recognized as rarely used
    SpellLocal = { undercurl = true, sp = c.hint }, -- Word from another region
  }
end

return M