require('plugins')
require('keymaps')
require('completion')

packer.use {
    'https://github.com/neovim/nvim-lspconfig',
    requires = {
        'https://github.com/L3MON4D3/LuaSnip',
        'https://github.com/hrsh7th/cmp-nvim-lsp'
    },
    config = function()
        map('n', '<f5>', vim.diagnostic.goto_prev)
        map('n', '<f6>', vim.diagnostic.goto_next)

        -- Only map the following keys after the language server attaches to the
        -- current buffer
        local on_attach = function(client, bufnr)
            local function maplsp(mode, shortcut, command)
                vim.keymap.set(mode, shortcut, command,
                               { noremap = true, silent = true, buffer=bufnr })
            end

            maplsp('n', 'gD', vim.lsp.buf.declaration)
            maplsp('n', 'gd', vim.lsp.buf.definition)
            maplsp('n', 'K', vim.lsp.buf.hover)
            maplsp('n', 'gi', vim.lsp.buf.implementation)
            maplsp('n', '<C-k>', vim.lsp.buf.signature_help)
            maplsp('n', '<Leader>wa', vim.lsp.buf.add_workspace_folder)
            maplsp('n', '<Leader>wr', vim.lsp.buf.remove_workspace_folder)
            maplsp('n', '<Leader>wl', function()
              print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
            end)
            maplsp('n', '<Leader>rn', vim.lsp.buf.rename)
            maplsp('n', '<Leader>a', vim.lsp.buf.code_action)
            maplsp('n', 'gr', vim.lsp.buf.references)
            maplsp('n', '<Leader>f', vim.lsp.buf.formatting)

            -- highlight symbol under cursor
            if client.resolved_capabilities.document_highlight then
                vim.cmd [[
                hi! LspReferenceRead cterm=bold ctermbg=red guibg=#633466
                hi! LspReferenceText cterm=bold ctermbg=red guibg=#633466
                hi! LspReferenceWrite cterm=bold ctermbg=red guibg=#633466
                ]]
                vim.api.nvim_create_augroup('lsp_document_highlight', {
                    clear = false
                })
                vim.api.nvim_clear_autocmds({
                    buffer = bufnr,
                    group = 'lsp_document_highlight',
                })
                vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
                    group = 'lsp_document_highlight',
                    buffer = bufnr,
                    callback = vim.lsp.buf.document_highlight,
                })
                vim.api.nvim_create_autocmd('CursorMoved', {
                    group = 'lsp_document_highlight',
                    buffer = bufnr,
                    callback = vim.lsp.buf.clear_references,
                })
            end
        end

        -- setup servers
        local capabilities = require('cmp_nvim_lsp').update_capabilities(
            vim.lsp.protocol.make_client_capabilities())

        if (vim.fn.executable('clangd') > 0) then
            require'lspconfig'.clangd.setup{
                cmd = {
                    'clangd',
                    '--compile-commands-dir=build',
                    '--clang-tidy',                     -- needs >=clangd-9
                    '--ranking-model=decision_forest'   -- needs >=clangd-12
                },
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('lua-language-server') > 0) then
            require'lspconfig'.sumneko_lua.setup {
                settings = {
                    Lua = {
                        runtime = {
                            version = 'LuaJIT',
                        },
                        diagnostics = {
                            globals = {'vim'},
                        },
                        workspace = {
                            library = vim.api.nvim_get_runtime_file("", true),
                        },
                        telemetry = {
                            enable = false,
                        },
                    },
                },
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('pylsp') > 0) then
            require'lspconfig'.pylsp.setup{
                settings = {
                    pylsp = {
                    }
                },
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('lemminx') > 0) then
            require'lspconfig'.lemminx.setup{
                filetypes = {
                    'xml', 'xsd', 'xsl', 'xslt', 'svg', 'gentoo-metadata'
                },
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('vscode-html-language-server') > 0) then
            require'lspconfig'.html.setup{
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('vscode-css-language-server') > 0) then
            require'lspconfig'.cssls.setup{
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('vscode-eslint-language-server') > 0) then
            require'lspconfig'.eslint.setup{
                on_attach = on_attach,
                capabilities = capabilities
            }
        end

        if (vim.fn.executable('vscode-json-language-server') > 0) then
            require'lspconfig'.jsonls.setup{
                on_attach = on_attach,
                capabilities = capabilities
            }
        end
    end
}