local M = {}

local nixInfo = _G.nixInfo or function(default, ...)
    return default
end

function M.get_nix_plugin_path(name)
    if vim.g.nix_info_plugin_name then
        return nixInfo(nil, "plugins", "lazy", name) or nixInfo(nil, "plugins", "start", name)
    else
        return vim.api.nvim_get_runtime_file("pack/*/*/" .. name, false)[1]
    end
end

function M.lsp_ft_fallback(name)
    local nvimlspcfg = M.get_nix_plugin_path("nvim-lspconfig")
    if not nvimlspcfg then
        local matches = vim.api.nvim_get_runtime_file("pack/*/*/nvim-lspconfig", false)
        nvimlspcfg = assert(matches[1], "nvim-lspconfig not found!")
    end
    vim.api.nvim_create_user_command("LspGetFiletypesToClipboard", function(opts)
        local lspname =
            assert(opts.fargs[1] or vim.fn.getreg("+") or name, "no name to search for provided or in clipboard")
        local ok, lspcfg = pcall(dofile, nvimlspcfg .. "/lsp/" .. lspname .. ".lua")
        if not ok or not lspcfg then
            error("failed to get config for lsp: " .. lspname)
        end
        vim.fn.setreg("+", "filetypes = " .. vim.inspect(lspcfg.filetypes or {}) .. ",")
    end, { nargs = "?" })
    vim.schedule(function()
        vim.notify((name or "lsp") .. " not provided filetype", vim.log.levels.WARN)
    end)
    return name and dofile(nvimlspcfg .. "/lsp/" .. name .. ".lua").filetypes or {}
end

M.auto_enable_handler = {
    spec_field = "auto_enable",
    set_lazy = false,
    modify = function(plugin)
        if vim.g.nix_info_plugin_name then
            if type(plugin.auto_enable) == "table" then
                for _, name in pairs(plugin.auto_enable) do
                    if not M.get_nix_plugin_path(name) then
                        plugin.enabled = false
                        break
                    end
                end
            elseif type(plugin.auto_enable) == "string" then
                if not M.get_nix_plugin_path(plugin.auto_enable) then
                    plugin.enabled = false
                end
            elseif type(plugin.auto_enable) == "boolean" and plugin.auto_enable then
                if not M.get_nix_plugin_path(plugin.name) then
                    plugin.enabled = false
                end
            end
        end
        return plugin
    end,
}

M.for_cat_handler = {
    spec_field = "for_cat",
    set_lazy = false,
    modify = function(plugin)
        if vim.g.nix_info_plugin_name then
            if type(plugin.for_cat) == "table" then
                plugin.enabled = nixInfo(plugin.for_cat.default, "settings", "cats", plugin.for_cat.cat)
            elseif type(plugin.for_cat) == "string" then
                plugin.enabled = nixInfo(false, "settings", "cats", plugin.for_cat)
            end
        end
        return plugin
    end,
}

return M