" syntax/nuwiki.vim — default highlight groups for nuwiki.
"
" Two responsibilities:
"   1. Default `@vimwiki*` highlight groups for the LSP semantic tokens
"      (SPEC §11 P7). Loaded eagerly so the very first hover/highlight
"      cycle after server startup already has colours.
"   2. A small regex-based fallback so static highlighting works on
"      buffers where the LSP isn't running yet.

if exists('b:current_syntax')
  finish
endif

" ===== Semantic-token defaults (Neovim's TS-style @group names) =====

" Headings — level modifiers map to progressively softer accents.
highlight default link @vimwikiHeading              Title
highlight default link @vimwikiHeading.level1       Title
highlight default link @vimwikiHeading.level2       Function
highlight default link @vimwikiHeading.level3       Identifier
highlight default link @vimwikiHeading.level4       Type
highlight default link @vimwikiHeading.level5       Constant
highlight default link @vimwikiHeading.level6       PreProc
highlight default link @vimwikiHeading.centered     Title

" Inline text styling.
highlight default link @vimwikiBold                 markdownBold
highlight default link @vimwikiItalic               markdownItalic
highlight default link @vimwikiBoldItalic           markdownBoldItalic
highlight default link @vimwikiStrikethrough        Comment
highlight default link @vimwikiSuperscript          Number
highlight default link @vimwikiSubscript            Number

" Code + math.
highlight default link @vimwikiCode                 String
highlight default link @vimwikiCodeBlock            String
highlight default link @vimwikiMath                 Number
highlight default link @vimwikiMathBlock            Number

" Links + transclusions.
highlight default link @vimwikiWikilink             Underlined
highlight default link @vimwikiExternalLink         Underlined
highlight default link @vimwikiUrl                  Underlined
highlight default link @vimwikiTransclusion         Identifier

" Misc.
highlight default link @vimwikiKeyword              Todo
highlight default link @vimwikiColor                Constant
highlight default link @vimwikiComment              Comment
highlight default link @vimwikiDefinitionTerm       Statement

" ===== Static fallback (no LSP required) =====

syntax case match

syntax match nuwikiHeading      /^\s*=\{1,6}\s.\{-}\s=\{1,6}\s*$/
syntax match nuwikiHorizontal   /^-\{4,}\s*$/
syntax match nuwikiCommentLine  /^%%.*$/
syntax region nuwikiCommentBlock start=/^%%+/ end=/+%%/ keepend
syntax region nuwikiPreformatted start=/^{{{/ end=/^}}}/ keepend
syntax region nuwikiMathBlock    start=/^{{\$/ end=/^}}\$/ keepend
syntax match nuwikiPlaceholder  /^%\(title\|nohtml\|template\|date\)\>.*$/

syntax match nuwikiBold         /\*[^*]\+\*/
syntax match nuwikiItalic       /\<_[^_]\+_\>/
syntax match nuwikiCode         /`[^`]\+`/
syntax match nuwikiMathInline   /\$[^$]\+\$/
syntax match nuwikiKeyword      /\<\(TODO\|DONE\|STARTED\|FIXME\|FIXED\|XXX\)\>/
syntax region nuwikiWikilink    start=/\[\[/ end=/\]\]/ keepend
syntax region nuwikiTransclusion start=/{{[^{]/ end=/}}/ keepend
syntax match nuwikiUrl          /\<\(https\?\|ftp\|mailto\|file\):\/\?\/\?\S\+/

highlight default link nuwikiHeading        Title
highlight default link nuwikiHorizontal     Comment
highlight default link nuwikiCommentLine    Comment
highlight default link nuwikiCommentBlock   Comment
highlight default link nuwikiPreformatted   String
highlight default link nuwikiMathBlock      Number
highlight default link nuwikiPlaceholder    PreProc
highlight default link nuwikiBold           Bold
highlight default link nuwikiItalic         Italic
highlight default link nuwikiCode           String
highlight default link nuwikiMathInline     Number
highlight default link nuwikiKeyword        Todo
highlight default link nuwikiWikilink       Underlined
highlight default link nuwikiTransclusion   Identifier
highlight default link nuwikiUrl            Underlined

let b:current_syntax = 'vimwiki'