local state = require "state"

local function natural_cmp(_left, _right)
	local left = _left.name:lower()
	local right = _right.name:lower()

	if left == right then
		return false
	end

    local is_l_dir = _left.type ~= "directory"
    local is_r_dir = _right.type ~= "directory"
    if ((is_l_dir or is_r_dir) and not (is_l_dir and is_r_dir)) then
        return is_r_dir
    end

	for i = 1, math.max(string.len(left), string.len(right)), 1 do
		local l = string.sub(left, i, -1)
		local r = string.sub(right, i, -1)

		if type(tonumber(string.sub(l, 1, 1))) == "number" and type(tonumber(string.sub(r, 1, 1))) == "number" then
			local l_number = tonumber(string.match(l, "^[0-9]+"))
			local r_number = tonumber(string.match(r, "^[0-9]+"))

			if l_number ~= r_number then
				return l_number < r_number
			end
		elseif string.sub(l, 1, 1) ~= string.sub(r, 1, 1) then
			return l < r
		end
	end
end

return {
    "nvim-tree/nvim-tree.lua",
    opts = {
        sort_by = function (nodes)
            table.sort(nodes, natural_cmp)
        end,
        view = {
            width = 30,
        },
        renderer = {
            root_folder_label = function()
                return ".."
            end,
            indent_markers = {
                enable = true,
            },
            icons = {
                show = {
                    folder_arrow = false,
                },
                glyphs = {
                    git = {
                        unstaged = "-",
                        staged = "+",
                        unmerged = "",
                        renamed = "󰏪",
                        untracked = "",
                        deleted = "󰆴",
                        ignored = "",
                    },
                },
            },
        },
        filters = {
            git_ignored = false,
        },
    },
    config = function(_, opts)
        local api = require "nvim-tree.api"
        local Event = api.events.Event

        api.events.subscribe(Event.Ready, function()
            state.nvim_tree_root = api.tree.get_nodes().absolute_path
        end)

        api.events.subscribe(Event.TreeRendered, function()
            state.nvim_tree_root = api.tree.get_nodes().absolute_path
        end)

        require("nvim-tree").setup(vim.tbl_extend("force", opts, {
            -- on_attach = function ()
            --     local function opts(desc)
            --       return { desc = "nvim-tree: " .. desc, buffer = bufnr, noremap = true, silent = true, nowait = true }
            --     end
            --
            --     local function edit_or_open()
            --       local node = api.tree.get_node_under_cursor()
            --
            --       if node.nodes ~= nil then
            --         -- expand or collapse folder
            --         api.node.open.edit()
            --       else
            --         -- open file
            --         api.node.open.edit()
            --         -- Close the tree if file was opened
            --         api.tree.close()
            --       end
            --     end
            --
            --     -- open as vsplit on current node
            --     local function vsplit_preview()
            --       local node = api.tree.get_node_under_cursor()
            --
            --       if node.nodes ~= nil then
            --         -- expand or collapse folder
            --         api.node.open.edit()
            --       else
            --         -- open file as vsplit
            --         api.node.open.vertical()
            --       end
            --
            --       -- Finally refocus on tree if it was lost
            --       api.tree.focus()
            --     end
            --
            --     vim.keymap.set("n", "l", edit_or_open,          opts("Edit Or Open"))
            --     vim.keymap.set("n", "h", api.tree.close,        opts("Close"))
            -- end
            --
        }))
    end,
    dependencies = {
        "nvim-tree/nvim-web-devicons",
    },
    keys = {
        { "<Leader>e", "<cmd>NvimTreeToggle<CR>", desc = "Toggle nvim-tree" },
    },
}