local M = {}

M.setup = function()
    local function lspSymbol(name, icon, linehlbg)
        local hl = 'DiagnosticSign' .. name
        local linehl = 'DiagnosticSignLineHl' .. name
        vim.api.nvim_set_hl(0, linehl, {
            bg = linehlbg,
        })
        vim.fn.sign_define(hl, { text = icon, numhl = hl, texthl = hl, linehl = linehl })
    end

    lspSymbol('Error', '', '#2d202a')
    lspSymbol('Warn', '', '#2e2a2d')
    lspSymbol('Info', '', '#192b38')
    lspSymbol('Hint', '', '#1a2b32')

    local border = {
        { '╭', 'FloatBorder' },
        { '─', 'FloatBorder' },
        { '╮', 'FloatBorder' },
        { '│', 'FloatBorder' },
        { '╯', 'FloatBorder' },
        { '─', 'FloatBorder' },
        { '╰', 'FloatBorder' },
        { '│', 'FloatBorder' },
    }

    local orig_util_open_floating_preview = vim.lsp.util.open_floating_preview
    function vim.lsp.util.open_floating_preview(contents, syntax, opts, ...)
        opts = opts or {}
        opts.border = opts.border or border
        return orig_util_open_floating_preview(contents, syntax, opts, ...)
    end

    vim.diagnostic.config({
        virtual_text = false,
        severity_sort = true,
        underline = true,
        update_in_insert = false,
        float = {
            focusable = false,
            style = 'minimal',
            border = 'rounded',
            source = 'always',
            header = '',
            prefix = '',
        },
    })
end

return M