-- Define nvim-lspconfig LSP servers here
local lsp_servers = {
    'basedpyright',
    'lua_ls',
    'tsserver',
    'tailwindcss',
    'emmet_ls',
    'bashls',
    'jdtls',
    'clangd',
}

local lspconfig = require('lspconfig')

-- import cmp-nvim-lsp plugin
local cmp_nvim_lsp = require('cmp_nvim_lsp')

-- import mason_lspconfig plugin
local mason_lspconfig = require('mason-lspconfig')

local keymap = vim.keymap -- for conciseness

vim.api.nvim_create_autocmd('LspAttach', {
    group = vim.api.nvim_create_augroup('UserLspConfig', {}),
    callback = function(ev)
        -- Buffer local mappings.
        -- See `:help vim.lsp.*` for documentation on any of the below functions
        local opts = { buffer = ev.buf, silent = true }

        -- set keybinds
        opts.desc = 'Show LSP references'
        keymap.set('n', 'lR', '<cmd>Telescope lsp_references<CR>', opts) -- show definition, references

        opts.desc = 'Go to declaration'
        keymap.set('n', 'lD', vim.lsp.buf.declaration, opts) -- go to declaration

        opts.desc = 'Inlay hint'
        keymap.set(
            'n',
            '<leader>lh',
            '<cmd>lua vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled())<CR>',
            opts
        )

        opts.desc = 'Show LSP definitions'
        keymap.set('n', 'ld', '<cmd>Telescope lsp_definitions<CR>', opts) -- show lsp definitions

        opts.desc = 'Show LSP implementations'
        keymap.set('n', 'li', '<cmd>Telescope lsp_implementations<CR>', opts) -- show lsp implementations

        opts.desc = 'Show LSP type definitions'
        keymap.set('n', 'lt', '<cmd>Telescope lsp_type_definitions<CR>', opts) -- show lsp type definitions

        opts.desc = 'See available code actions'
        keymap.set({ 'n', 'v' }, '<leader>ca', vim.lsp.buf.code_action, opts) -- see available code actions, in visual mode will apply to selection

        opts.desc = 'Smart rename'
        keymap.set('n', '<leader>mR', vim.lsp.buf.rename, opts) -- smart rename

        opts.desc = 'Show buffer diagnostics'
        keymap.set('n', '<leader>lD', '<cmd>Telescope diagnostics bufnr=0<CR>', opts) -- show  diagnostics for file

        opts.desc = 'Show line diagnostics'
        keymap.set('n', '<leader>ld', vim.diagnostic.open_float, opts) -- show diagnostics for line

        opts.desc = 'Show documentation for what is under cursor'
        keymap.set('n', 'K', vim.lsp.buf.hover, opts) -- show documentation for what is under cursor

        opts.desc = 'Restart LSP'
        keymap.set('n', '<leader>ls', ':LspRestart<CR>', opts) -- mapping to restart lsp if necessary
    end,
})

-- used to enable autocompletion (assign to every lsp server config)
local capabilities = cmp_nvim_lsp.default_capabilities()

-- Change the Diagnostic symbols in the sign column (gutter)
local signs = { Error = ' ', Warn = ' ', Hint = '󰠠 ', Info = ' ' }
for type, icon in pairs(signs) do
    local hl = 'DiagnosticSign' .. type
    vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = '' })
end

-- Set Mason LSPs Here
mason_lspconfig.setup({
    ensure_installed = lsp_servers,
    automatic_installation = true,
    handlers = {
        -- default handler for installed servers
        function(server_name)
            lspconfig[server_name].setup({
                capabilities = capabilities,
            })
        end,
        ['lua_ls'] = function()
            -- configure lua server (with special settings)
            lspconfig['lua_ls'].setup({
                capabilities = capabilities,
                settings = {
                    Lua = {
                        -- make the language server recognize "vim" global
                        diagnostics = {
                            globals = { 'vim' },
                        },
                        hint = { enable = true },
                        completion = {
                            callSnippet = 'Replace',
                        },
                    },
                },
            })
        end,
        ['basedpyright'] = function()
            -- configure pyright server (with special settings)
            lspconfig['basedpyright'].setup({
                capabilities = capabilities,
                settings = {
                    python = {
                        hint = { enable = true },
                    },
                },
                handlers = {
                    ['textDocument/publishDiagnostics'] = function() end,
                },
            })
        end,
        ['emmet_ls'] = function()
            -- configure emmet language server
            lspconfig['emmet_ls'].setup({
                capabilities = capabilities,
                filetypes = {
                    'html',
                    'javascript',
                    'typescript',
                    'javascriptreact',
                    'typescriptreact',
                    'css',
                    'less',
                },
            })
        end,
    },
})