-- for nvim lsp support

-- Mappings.
-- See `:help vim.diagnostic.*` for documentation on any of the below functions
local opts = { noremap=true, silent=true }
vim.api.nvim_set_keymap('n', '<leader>d', '<cmd>lua vim.diagnostic.open_float()<CR>', opts)
vim.api.nvim_set_keymap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<CR>', opts)
vim.api.nvim_set_keymap('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<CR>', opts)
vim.api.nvim_set_keymap('n', 'da', '<cmd>lua vim.diagnostic.setloclist()<CR>', opts)

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
    -- Enable completion triggered by <c-x><c-o>
    vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

    -- Mappings.
    -- See `:help vim.lsp.*` for documentation on any of the below functions
    vim.api.nvim_buf_set_keymap(bufnr, 'n', '<C-]>', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', 'gsh', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', '<leader>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', '<leader>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
    vim.api.nvim_buf_set_keymap(bufnr, 'n', '<leader>F', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
end

local signs = { Error = "🔥", Warn = "⚠️ ", Hint = "✨", Info = "ℹ️ " }
for type, icon in pairs(signs) do
    local hl = "DiagnosticSign" .. type
    vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = hl })
end

-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = {
    -- server_name = settings
    pylsp = {
        pylsp = {
            plugins = {
                pylsp_mypy = {
                    enabled = true,
                    live_move = false
                }
            }
        }
    },
    gopls = {
        gopls = {
            analyses = {
                unusedparams = true,
                unusedwrite = true,
                shadow = true,
            },
            staticcheck = true,
        },
    },
}
for lsp, settings in pairs(servers) do
    require('lspconfig')[lsp].setup {
        on_attach = on_attach,
        flags = {
            -- This will be the default in neovim 0.7+
            debounce_text_changes = 150,
        },
        settings = settings,
    }
end

-- virtual text is not too useful
vim.diagnostic.config({ virtual_text = false, signs = true })

-- for go
-- install gopls with: go install golang.org/x/tools/gopls@latest
vim.cmd([[autocmd BufWritePre *.go :lua vim.lsp.buf.formatting_seq_sync()]])