import convert from 'color-convert';
import type { Template } from './index.js';
import { colorSetToVariants } from '../color-set/index.js';
import { source } from 'common-tags';

function gtermToCterm(hex: string): number {
  return convert.hex.ansi256(hex);
}

const template: Template = {
  name: 'Vim',
  render: async function* (colorSet) {
    const variants = colorSetToVariants(colorSet);
    const colorVars = variants
      .map(
        ({ colors, name }) => source`
          if &background == '${name}'
            let s:guishade0 = "${colors.shade0}"
            let s:guishade1 = "${colors.shade1}"
            let s:guishade2 = "${colors.shade2}"
            let s:guishade3 = "${colors.shade3}"
            let s:guishade4 = "${colors.shade4}"
            let s:guishade5 = "${colors.shade5}"
            let s:guishade6 = "${colors.shade6}"
            let s:guishade7 = "${colors.shade7}"
            let s:guiaccent0 = "${colors.accent0}"
            let s:guiaccent1 = "${colors.accent1}"
            let s:guiaccent2 = "${colors.accent2}"
            let s:guiaccent3 = "${colors.accent3}"
            let s:guiaccent4 = "${colors.accent4}"
            let s:guiaccent5 = "${colors.accent5}"
            let s:guiaccent6 = "${colors.accent6}"
            let s:guiaccent7 = "${colors.accent7}"
            let s:ctermshade0 = ${gtermToCterm(colors.shade0)}
            let s:ctermshade1 = ${gtermToCterm(colors.shade1)}
            let s:ctermshade2 = ${gtermToCterm(colors.shade2)}
            let s:ctermshade3 = ${gtermToCterm(colors.shade3)}
            let s:ctermshade4 = ${gtermToCterm(colors.shade4)}
            let s:ctermshade5 = ${gtermToCterm(colors.shade5)}
            let s:ctermshade6 = ${gtermToCterm(colors.shade6)}
            let s:ctermshade7 = ${gtermToCterm(colors.shade7)}
            let s:ctermaccent0 = ${gtermToCterm(colors.accent0)}
            let s:ctermaccent1 = ${gtermToCterm(colors.accent1)}
            let s:ctermaccent2 = ${gtermToCterm(colors.accent2)}
            let s:ctermaccent3 = ${gtermToCterm(colors.accent3)}
            let s:ctermaccent4 = ${gtermToCterm(colors.accent4)}
            let s:ctermaccent5 = ${gtermToCterm(colors.accent5)}
            let s:ctermaccent6 = ${gtermToCterm(colors.accent6)}
            let s:ctermaccent7 = ${gtermToCterm(colors.accent7)}
          endif
        `,
      )
      .join('\n');

    yield {
      path: `${colorSet.title.upperCamel}.vim`,
      content: source`
        ${colorVars}

        highlight clear
        syntax reset
        let g:colors_name = "${colorSet.title.upperCamel}"

        """"""""""
        " Normal "
        """"""""""

        exec "hi Normal guifg=".s:guishade6." guibg=".s:guishade0
        exec "hi Normal ctermfg=".s:ctermshade6." ctermbg=".s:ctermshade0

        """""""""""""""""
        " Syntax groups "
        """""""""""""""""

        " Default

        exec "hi Comment guifg=".s:guishade2
        exec "hi Comment ctermfg=".s:ctermshade2
        exec "hi Constant guifg=".s:guiaccent3
        exec "hi Constant ctermfg=".s:ctermaccent3
        exec "hi Character guifg=".s:guiaccent4
        exec "hi Character ctermfg=".s:ctermaccent4
        exec "hi Identifier guifg=".s:guiaccent2." gui=none"
        exec "hi Identifier ctermfg=".s:ctermaccent2." cterm=none"
        exec "hi Statement guifg=".s:guiaccent5
        exec "hi Statement ctermfg=".s:ctermaccent5
        exec "hi PreProc guifg=".s:guiaccent6
        exec "hi PreProc ctermfg=".s:ctermaccent6
        exec "hi Type guifg=".s:guiaccent7
        exec "hi Type ctermfg=".s:ctermaccent7
        exec "hi Special guifg=".s:guiaccent4
        exec "hi Special ctermfg=".s:ctermaccent4
        exec "hi Underlined guifg=".s:guiaccent5
        exec "hi Underlined ctermfg=".s:ctermaccent5
        exec "hi Error guifg=".s:guiaccent0." guibg=".s:guishade1
        exec "hi Error ctermfg=".s:ctermaccent0." ctermbg=".s:ctermshade1
        exec "hi Todo guifg=".s:guiaccent0." guibg=".s:guishade1
        exec "hi Todo ctermfg=".s:ctermaccent0." ctermbg=".s:ctermshade1
        exec "hi Function guifg=".s:guiaccent1
        exec "hi Function ctermfg=".s:ctermaccent1

        " GitGutter

        exec "hi GitGutterAdd guifg=".s:guiaccent3
        exec "hi GitGutterAdd ctermfg=".s:ctermaccent3
        exec "hi GitGutterChange guifg=".s:guiaccent2
        exec "hi GitGutterChange ctermfg=".s:ctermaccent2
        exec "hi GitGutterChangeDelete guifg=".s:guiaccent2
        exec "hi GitGutterChangeDelete ctermfg=".s:ctermaccent2
        exec "hi GitGutterDelete guifg=".s:guiaccent0
        exec "hi GitGutterDelete ctermfg=".s:ctermaccent0

        " fugitive

        exec "hi gitcommitComment guifg=".s:guishade3
        exec "hi gitcommitComment ctermfg=".s:ctermshade3
        exec "hi gitcommitOnBranch guifg=".s:guishade3
        exec "hi gitcommitOnBranch ctermfg=".s:ctermshade3
        exec "hi gitcommitHeader guifg=".s:guishade5
        exec "hi gitcommitHeader ctermfg=".s:ctermshade5
        exec "hi gitcommitHead guifg=".s:guishade3
        exec "hi gitcommitHead ctermfg=".s:ctermshade3
        exec "hi gitcommitSelectedType guifg=".s:guiaccent3
        exec "hi gitcommitSelectedType ctermfg=".s:ctermaccent3
        exec "hi gitcommitSelectedFile guifg=".s:guiaccent3
        exec "hi gitcommitSelectedFile ctermfg=".s:ctermaccent3
        exec "hi gitcommitDiscardedType guifg=".s:guiaccent2
        exec "hi gitcommitDiscardedType ctermfg=".s:ctermaccent2
        exec "hi gitcommitDiscardedFile guifg=".s:guiaccent2
        exec "hi gitcommitDiscardedFile ctermfg=".s:ctermaccent2
        exec "hi gitcommitUntrackedFile guifg=".s:guiaccent0
        exec "hi gitcommitUntrackedFile ctermfg=".s:ctermaccent0

        """""""""""""""""""""""
        " Highlighting Groups "
        """""""""""""""""""""""

        " Default

        exec "hi ColorColumn guibg=".s:guishade1
        exec "hi ColorColumn ctermbg=".s:ctermshade1
        exec "hi Conceal guifg=".s:guishade2
        exec "hi Conceal ctermfg=".s:ctermshade2
        exec "hi Cursor guifg=".s:guishade0
        exec "hi Cursor ctermfg=".s:ctermshade0
        exec "hi CursorColumn guibg=".s:guishade1
        exec "hi CursorColumn ctermbg=".s:ctermshade1
        exec "hi CursorLine guibg=".s:guishade1
        exec "hi CursorLine ctermbg=".s:ctermshade1." cterm=none"
        exec "hi Directory guifg=".s:guiaccent5
        exec "hi Directory ctermfg=".s:ctermaccent5
        exec "hi DiffAdd guifg=".s:guiaccent3." guibg=".s:guishade1
        exec "hi DiffAdd ctermfg=".s:ctermaccent3." ctermbg=".s:ctermshade1
        exec "hi DiffChange guifg=".s:guiaccent2." guibg=".s:guishade1
        exec "hi DiffChange ctermfg=".s:ctermaccent2." ctermbg=".s:ctermshade1
        exec "hi DiffDelete guifg=".s:guiaccent0." guibg=".s:guishade1
        exec "hi DiffDelete ctermfg=".s:ctermaccent0." ctermbg=".s:ctermshade1
        exec "hi DiffText guifg=".s:guiaccent2." guibg=".s:guishade2
        exec "hi DiffText ctermfg=".s:ctermaccent2." ctermbg=".s:ctermshade2
        exec "hi ErrorMsg guifg=".s:guishade7." guibg=".s:guiaccent0
        exec "hi ErrorMsg ctermfg=".s:ctermshade7." ctermbg=".s:ctermaccent0
        exec "hi VertSplit guifg=".s:guishade0." guibg=".s:guishade3
        exec "hi VertSplit ctermfg=".s:ctermshade0." ctermbg=".s:ctermshade3
        exec "hi Folded guifg=".s:guishade4." guibg=".s:guishade1
        exec "hi Folded ctermfg=".s:ctermshade4." ctermbg=".s:ctermshade1
        exec "hi FoldColumn guifg=".s:guishade4." guibg=".s:guishade1
        exec "hi FoldColumn ctermfg=".s:ctermshade4." ctermbg=".s:ctermshade1
        exec "hi SignColumn guibg=".s:guishade0
        exec "hi SignColumn ctermbg=".s:ctermshade0
        exec "hi IncSearch guifg=".s:guishade0." guibg=".s:guiaccent2
        exec "hi IncSearch ctermfg=".s:ctermshade0." ctermbg=".s:ctermaccent2
        exec "hi LineNr guifg=".s:guishade2." guibg=".s:guishade0
        exec "hi LineNr ctermfg=".s:ctermshade2." ctermbg=".s:ctermshade0
        exec "hi CursorLineNr guifg=".s:guishade3." guibg=".s:guishade1
        exec "hi CursorLineNr ctermfg=".s:ctermshade3." ctermbg=".s:ctermshade1
        exec "hi MatchParen guibg=".s:guishade2
        exec "hi MatchParen ctermbg=".s:ctermshade2
        exec "hi MoreMsg guifg=".s:guishade0." guibg=".s:guiaccent4
        exec "hi MoreMsg ctermfg=".s:ctermshade0." ctermbg=".s:ctermaccent4
        exec "hi NonText guifg=".s:guishade2." guibg=".s:guishade0
        exec "hi NonText ctermfg=".s:ctermshade2." ctermbg=".s:ctermshade0
        exec "hi Pmenu guifg=".s:guishade6." guibg=".s:guishade1
        exec "hi Pmenu ctermfg=".s:ctermshade6." ctermbg=".s:ctermshade1
        exec "hi PmenuSel guifg=".s:guiaccent4." guibg=".s:guishade1
        exec "hi PmenuSel ctermfg=".s:ctermaccent4." ctermbg=".s:ctermshade1
        exec "hi PmenuSbar guifg=".s:guiaccent3." guibg=".s:guishade1
        exec "hi PmenuSbar ctermfg=".s:ctermaccent3." ctermbg=".s:ctermshade1
        exec "hi PmenuThumb guifg=".s:guiaccent0." guibg=".s:guishade2
        exec "hi PmenuThumb ctermfg=".s:ctermaccent0." ctermbg=".s:ctermshade2
        exec "hi Question guifg=".s:guishade7." guibg=".s:guishade1
        exec "hi Question ctermfg=".s:ctermshade7." ctermbg=".s:ctermshade1
        exec "hi Search guifg=".s:guishade0." guibg=".s:guiaccent2
        exec "hi Search ctermfg=".s:ctermshade0." ctermbg=".s:ctermaccent2
        exec "hi SpecialKey guifg=".s:guiaccent7." guibg=".s:guishade0
        exec "hi SpecialKey ctermfg=".s:ctermaccent7." ctermbg=".s:ctermshade0
        exec "hi SpellBad guifg=".s:guiaccent0
        exec "hi SpellBad ctermfg=".s:ctermaccent0." ctermbg=NONE cterm=undercurl"
        exec "hi SpellCap guifg=".s:guiaccent2
        exec "hi SpellCap ctermfg=".s:ctermaccent2." ctermbg=NONE cterm=undercurl"
        exec "hi SpellLocal guifg=".s:guiaccent4
        exec "hi SpellLocal ctermfg=".s:ctermaccent4
        exec "hi SpellRare guifg=".s:guiaccent1
        exec "hi SpellRare ctermfg=".s:ctermaccent1
        exec "hi StatusLine guifg=".s:guishade4." guibg=".s:guishade1." gui=none"
        exec "hi StatusLine ctermfg=".s:ctermshade4." ctermbg=".s:ctermshade1." cterm=none"
        exec "hi TabLine guifg=".s:guishade5." guibg=".s:guishade1
        exec "hi TabLine ctermfg=".s:ctermshade5." ctermbg=".s:ctermshade1
        exec "hi TabLineFill guibg=".s:guishade1
        exec "hi TabLineFill ctermbg=".s:ctermshade1
        exec "hi TabLineSel guifg=".s:guishade6." guibg=".s:guishade0
        exec "hi TabLineSel ctermfg=".s:ctermshade6." ctermbg=".s:ctermshade0
        exec "hi Title guifg=".s:guiaccent5
        exec "hi Title ctermfg=".s:ctermaccent5
        exec "hi Visual guibg=".s:guishade1
        exec "hi Visual ctermbg=".s:ctermshade1
        exec "hi VisualNOS guifg=".s:guiaccent0." guibg=".s:guishade1
        exec "hi VisualNOS ctermfg=".s:ctermaccent0." ctermbg=".s:ctermshade1
        exec "hi WarningMsg guifg=".s:guiaccent0
        exec "hi WarningMsg ctermfg=".s:ctermaccent0
        exec "hi WildMenu guifg=".s:guiaccent4." guibg=".s:guishade1
        exec "hi WildMenu ctermfg=".s:ctermaccent4." ctermbg=".s:ctermshade1

        " NERDTree

        exec "hi NERDTreeExecFile guifg=".s:guiaccent4
        exec "hi NERDTreeExecFile ctermfg=".s:ctermaccent4
        exec "hi NERDTreeDirSlash guifg=".s:guiaccent5
        exec "hi NERDTreeDirSlash ctermfg=".s:ctermaccent5
        exec "hi NERDTreeCWD guifg=".s:guiaccent0
        exec "hi NERDTreeCWD ctermfg=".s:ctermaccent0

        """"""""""""
        " Clean up "
        """"""""""""

        unlet s:guishade0 s:guishade1 s:guishade2 s:guishade3 s:guishade4 s:guishade5 s:guishade6 s:guishade7 s:guiaccent0 s:guiaccent1 s:guiaccent2 s:guiaccent3 s:guiaccent4 s:guiaccent5 s:guiaccent6 s:guiaccent7
        unlet s:ctermshade0 s:ctermshade1 s:ctermshade2 s:ctermshade3 s:ctermshade4 s:ctermshade5 s:ctermshade6 s:ctermshade7 s:ctermaccent0 s:ctermaccent1 s:ctermaccent2 s:ctermaccent3 s:ctermaccent4 s:ctermaccent5 s:ctermaccent6 s:ctermaccent7
      `,
    };
  },
  renderInstructions: ([path], colorSet) => source`
    Copy or symlink \`${path}\` to \`~/.vim/colors/\`.

    Then set the colorscheme in \`.vimrc\`:

    \`\`\`
    " The background option must be set before running this command.
    colorscheme ${colorSet.title.upperCamel}
    \`\`\`
  `,
};

export default template;