-- =============================================================================
-- filetree.lua — 侧边文件树
-- =============================================================================
-- 【新增文件】nvim-tree 作为常驻侧边栏（VSCode 风格），oil.nvim 保留用于快速编辑。
-- 两者共存：nvim-tree 看结构，oil 改文件。
-- 键位：<leader>e 开关侧边栏

return {
  {
    "nvim-tree/nvim-tree.lua",
    version = "*",
    lazy = false,  -- 立即加载，确保打开就有侧边栏
    dependencies = { "nvim-tree/nvim-web-devicons" },
    config = function()
      -- 禁用 netrw（避免和 oil 冲突，oil 自己也会禁一次，这里双保险）
      vim.g.loaded_netrw = 1
      vim.g.loaded_netrwPlugin = 1

      require("nvim-tree").setup({
        sort_by = "case_sensitive",
        view = {
          width = 30,
          side = "left",
          relativenumber = false,
          -- ✅ 关闭文件树时自动调整窗口大小
          adaptive_size = false,
        },
        renderer = {
          group_empty = true,
          icons = {
            show = {
              file = true,
              folder = true,
              folder_arrow = true,
              git = true,
            },
          },
        },
        filters = {
          dotfiles = false,
          custom = { "^.git$" },
        },
        git = {
          enable = true,
          ignore = false,
        },
        actions = {
          open_file = {
            quit_on_open = false,  -- 打开文件不关树
            window_picker = {
              enable = true,
            },
          },
        },
        -- ✅ 打开 nvim 时自动打开文件树
        auto_open_on_setup = false,  -- 不自动开，用 <leader>e 手动开
        on_attach = function(bufnr)
          local api = require("nvim-tree.api")
          api.config.mappings.default_on_attach(bufnr)
        end,
      })

      -- <leader>e 开关侧边文件树
      vim.keymap.set("n", "<leader>e", "<cmd>NvimTreeToggle<CR>",
        { desc = "侧边文件树", noremap = true, silent = true })
    end,
  },
}