local ok, lsp = pcall(require, 'lspconfig')
if not ok then
    return
end

{{- if ne .chezmoi.os "openbsd" }}
-- See :help mason-settings
require('mason').setup({
    ui = { border = 'rounded' }
})

-- See :help mason-lspconfig-settings
require('mason-lspconfig').setup({
    ensure_installed = {
        'clangd',
        'gopls',
        'ltex',
        'svelte',
        'tsserver',
        'eslint',
        'html',
        'cssls',
        'lua_ls'
    }
})
{{- end }}

local lsp_defaults = lsp.util.default_config

lsp_defaults.capabilities = vim.tbl_deep_extend(
    'force',
    lsp_defaults.capabilities,
    require('cmp_nvim_lsp').default_capabilities()
)

local sign = function(opts)
    -- See :help sign_define()
    vim.fn.sign_define(opts.name, {
        texthl = opts.name,
        text = opts.text,
        numhl = ''
    })
end

sign({ name = 'DiagnosticSignError', text = '✘' })
sign({ name = 'DiagnosticSignWarn', text = '▲' })
sign({ name = 'DiagnosticSignHint', text = '⚑' })
sign({ name = 'DiagnosticSignInfo', text = '' })

vim.diagnostic.config({
    virtual_text = false,
    severity_sort = true,
    float = {
        border = 'rounded',
        source = 'always',
        header = '',
        prefix = '',
    },
})

vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
    vim.lsp.handlers.hover,
    { border = 'rounded' }
)

vim.lsp.handlers['textDocument/signatureHelp'] = vim.lsp.with(
    vim.lsp.handlers.signature_help,
    { border = 'rounded' }
)

vim.lsp.handlers["workspace/diagnostic/refresh"] = function(_, _, ctx)
    local ns = vim.lsp.diagnostic.get_namespace(ctx.client_id)
    pcall(vim.diagnostic.reset, ns)
    return true
end

require("lsp-format").setup {}

{{- if ne .chezmoi.os "openbsd" }}
local group = vim.api.nvim_create_augroup('lsp_cmds', { clear = true })

vim.api.nvim_create_autocmd('LspAttach', {
    group = group,
    desc = 'LSP actions',
    callback = function(args)
        local bufmap = function(mode, lhs, rhs)
            local opts = { buffer = true }
            vim.keymap.set(mode, lhs, rhs, opts)
        end
        local client = vim.lsp.get_client_by_id(args.data.client_id)
        require("lsp-format").on_attach(client)

        bufmap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<cr>')
        bufmap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<cr>')
        bufmap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<cr>')
        bufmap('n', 'go', '<cmd>lua vim.lsp.buf.type_definition()<cr>')
        bufmap('n', 'gs', '<cmd>lua vim.lsp.buf.signature_help()<cr>')
        bufmap('n', 'gA', '<cmd>Telescope diagnostics<cr>')
        bufmap('n', 'gr', '<cmd>Telescope lsp_references<cr>')
        bufmap('n', 'gi', '<cmd>Telescope lsp_implementations<cr>')
        bufmap('n', '<F2>', '<cmd>lua vim.lsp.buf.rename()<cr>')
        bufmap('n', '<F3>', '<cmd>lua vim.lsp.buf.format({async = true})<cr>')
        bufmap('n', '<F4>', '<cmd>lua vim.lsp.buf.code_action()<cr>')
        bufmap('x', '<F4>', '<cmd>lua vim.lsp.buf.range_code_action()<cr>')
        bufmap('n', 'gl', '<cmd>lua vim.diagnostic.open_float()<cr>')
        bufmap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<cr>')
        bufmap('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<cr>')
    end
})

require('mason-lspconfig').setup_handlers({
    function(server)
        lsp[server].setup({})
    end,
    ['tsserver'] = function()
        lsp.tsserver.setup({
            settings = {
                completions = {
                    completeFunctionCalls = true
                }
            }
        })
    end,
    ['lua_ls'] = function()
        lsp.lua_ls.setup({
            settings = {
                Lua = {
                    diagnostics = {
                        globals = { 'vim' }
                    },
                }
            }
        })
    end
})
{{- else }}
local on_attach = function(client)
    local bufmap = function(mode, lhs, rhs)
        local opts = {buffer = true}
        vim.keymap.set(mode, lhs, rhs, opts)
    end
    require("lsp-format").on_attach(client)

    bufmap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<cr>')
    bufmap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<cr>')
    bufmap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<cr>')
    bufmap('n', 'go', '<cmd>lua vim.lsp.buf.type_definition()<cr>')
    bufmap('n', 'gs', '<cmd>lua vim.lsp.buf.signature_help()<cr>')
    bufmap('n', 'gA', '<cmd>Telescope diagnostics<cr>')
    bufmap('n', 'gr', '<cmd>Telescope lsp_references<cr>')
    bufmap('n', 'gi', '<cmd>Telescope lsp_implementations<cr>')
    bufmap('n', '<F2>', '<cmd>lua vim.lsp.buf.rename()<cr>')
    bufmap('n', '<F3>', '<cmd>lua vim.lsp.buf.format({async = true})<cr>')
    bufmap('n', '<F4>', '<cmd>lua vim.lsp.buf.code_action()<cr>')
    bufmap('x', '<F4>', '<cmd>lua vim.lsp.buf.range_code_action()<cr>')
    bufmap('n', 'gl', '<cmd>lua vim.diagnostic.open_float()<cr>')
    bufmap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<cr>')
    bufmap('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<cr>')
end

lsp.gopls.setup {
    settings = {
      gopls = {
        analyses = {
          unusedparams = true,
          unusedvariable = true,
          shadow = true
        },
        staticcheck = true,
      },
    },
    on_attach = on_attach
}
lsp.clangd.setup { on_attach = on_attach }
lsp.ltex.setup { on_attach = on_attach }
lsp.svelte.setup { on_attach = on_attach }
lsp.tsserver.setup { on_attach = on_attach }
lsp.lua_ls.setup {
    settings = {
        Lua = {
            diagnostics = {
                globals = { 'vim' }
            },
        }
    },
    on_attach = on_attach
}
{{- end }}