-- Tab completion
--[[
vim.api.nvim_set_keymap("i", "<tab>",
	"coc#pum:visible() ? coc#pum#next(1) : v:lua.check_back_space() ? '<tab>' : coc#refresh()",
	{silent = true, expr = true, noremap = true})

vim.api.nvim_set_keymap("i", "<s-tab>", "pumvisible() ? '<C-p>' : '<C-h>'",
	{expr = true, noremap = true})
]]

vim.cmd(
[[
inoremap <silent><expr> <TAB>
	\ coc#pum#visible() ? coc#pum#next(1):
	\ v:lua.check_back_space() ? "\<Tab>" :
	\ coc#refresh()

inoremap <silent><expr> <S-TAB>
	\ coc#pum#visible() ? coc#pum#prev(1):
	\ v:lua.check_back_space() ? "\<Tab>" :
	\ coc#refresh()
]]
)

-- Use <c-space> to trigger completion
vim.api.nvim_set_keymap("i", "<C-space>", "coc#refresh()",
	{silent = true, expr = true, noremap = true})

-- Make <CR> auto-select the first completion item and notify coc.nvim to
-- format on enter, <cr> could be remapped by other vim plugin
vim.api.nvim_set_keymap("i", "<CR>",
	"pumvisible() ? coc#_select_confirm() : '<C-g>u<CR><c-r>=coc#on_enter()<CR>'",
	{silent = true, expr = true, noremap = true})

-- Use `[g` and `]g` to navigate diagnostics
-- Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
vim.api.nvim_set_keymap("n", "[g", "<Plug>(coc-diagnostic-prev)", {silent = true})
vim.api.nvim_set_keymap("n", "]g", "<Plug>(coc-diagnostic-next)", {silent = true})

-- GoTo code navigation.
vim.api.nvim_set_keymap("n", "gd", "<Plug>(coc-definition)", {silent = true})
vim.api.nvim_set_keymap("n", "gy", "<Plug>(coc-type-definition)", {silent = true})
vim.api.nvim_set_keymap("n", "gi", "<Plug>(coc-implementation)", {silent = true})
vim.api.nvim_set_keymap("n", "gr", "<Plug>(coc-references)", {silent = true})

-- Use K to show documentation in preview window.
vim.api.nvim_set_keymap("n", "K", ":call v:lua.show_documentation()<CR>",
	{silent = true, noremap = true})

-- Symbol renaming.
vim.api.nvim_set_keymap("n", "<leader>rn", "<Plug>(coc-rename)", {})

vim.api.nvim_set_keymap(
	"n",
	"<leader>d", ":CocCommand rust-analyzer.openDocs<CR>",
	{ silent = true, noremap = true }
)

-- Formatting selected code.
-- vim.api.nvim_set_keymap("x", "<leader>f", "<Plug>(coc-format-selected)", {})
-- vim.api.nvim_set_keymap("n", "<leader>f", "<Plug>(coc-format-selected)", {})

-- Remap <C-f> and <C-b> for scroll float windows/popups.
vim.api.nvim_set_keymap(
	"n",
	"<C-f>",
	"coc#float#has_scroll() ? coc#float#scroll(1) : '\\<C-f>'",
	{silent = true, nowait = true, expr = true, noremap = true}
)
vim.api.nvim_set_keymap(
	"n",
	"<C-b>",
	"coc#float#has_scroll() ? coc#float#scroll(0) : '\\<C-b>'",
	{silent = true, nowait = true, expr = true, noremap = true}
)
vim.api.nvim_set_keymap(
	"i",
	"<C-f>",
	"coc#float#has_scroll() ? '\\<c-r>=coc#float#scroll(1)\\<cr>' : '\\<Right>'",
	{silent = true, nowait = true, expr = true, noremap = true}
)
vim.api.nvim_set_keymap(
	"i",
	"<C-b>",
	"coc#float#has_scroll() ? '\\<c-r>=coc#float#scroll(0)\\<cr>' : '\\<Left>'",
	{silent = true, nowait = true, expr = true, noremap = true}
)
vim.api.nvim_set_keymap(
	"v",
	"<C-f>",
	"coc#float#has_scroll() ? coc#float#scroll(1) : '\\<C-f>'",
	{silent = true, nowait = true, expr = true, noremap = true}
)
vim.api.nvim_set_keymap(
	"v",
	"<C-b>",
	"coc#float#has_scroll() ? coc#float#scroll(0) : '\\<C-b>'",
	{silent = true, nowait = true, expr = true, noremap = true}
)

--[[
" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocAction('format')

" Add `:Fold` command to fold current buffer.
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Mappings for CoCList
" Show all diagnostics.
nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions.
nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
" Show commands.
nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document.
nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols.
nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list.
nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>

]]