-- Go filetype settings (Go uses tabs, not spaces)
vim.api.nvim_create_autocmd("FileType", {
    pattern = { "go", "gomod", "gowork", "gotmpl" },
    callback = function()
        vim.opt_local.expandtab = false
        vim.opt_local.tabstop = 4
        vim.opt_local.shiftwidth = 4
    end,
})

-- Go LSP configuration
-- Uses gopls installed via Mason

local status_ok, cmp_nvim_lsp = pcall(require, "cmp_nvim_lsp")
local capabilities = status_ok
    and cmp_nvim_lsp.default_capabilities(vim.lsp.protocol.make_client_capabilities())
    or vim.lsp.protocol.make_client_capabilities()

vim.lsp.config("gopls", {
    cmd = { "gopls" },
    filetypes = { "go", "gomod", "gowork", "gotmpl" },
    capabilities = capabilities,
    root_markers = { "go.mod", ".git" },
    settings = {
        gopls = {
            hints = {
                assignVariableTypes = true,
                compositeLiteralFields = true,
                compositeLiteralTypes = true,
                constantValues = true,
                functionTypeParameters = true,
                parameterNames = true,
                rangeVariableTypes = true,
            },
            analyses = {
                unusedparams = true,
                shadow = true,
                nilness = true,
            },
            staticcheck = true,
            gofumpt = true, -- prefer gofumpt formatting
            usePlaceholders = true,
            completeUnimported = true,
        },
    },
})

vim.lsp.enable("gopls")