-- ==============================
-- 基础设置
-- ==============================
vim.g.mapleader = " "             -- 设置 <leader> 键为空格
vim.o.number = true               -- 显示行号
vim.o.relativenumber = true       -- 相对行号
vim.o.expandtab = true            -- Tab 转换为空格
vim.o.tabstop = 4                 -- 一个 Tab 显示为 4 空格
vim.o.shiftwidth = 4              -- 自动缩进 4 空格
vim.o.softtabstop = 4             -- 编辑时 Tab = 4 空格
vim.o.smartindent = true          -- 智能缩进
vim.o.wrap = false                -- 不自动换行
vim.o.ignorecase = true           -- 搜索忽略大小写
vim.o.smartcase = true            -- 如果有大写，则大小写敏感
vim.o.termguicolors = true        -- 开启真彩色
vim.o.cursorline = true           -- 高亮当前行

-- ==============================
-- 插件管理（lazy.nvim）
-- ==============================
local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({
    "git",
    "clone",
    "--filter=blob:none",
    "https://github.com/folke/lazy.nvim.git",
    "--branch=stable",
    lazypath,
  })
end
vim.opt.rtp:prepend(lazypath)

require("lazy").setup({
    -- 主题
    { "ellisonleao/gruvbox.nvim", priority = 1000, config = true },

    -- 状态栏
    { "nvim-lualine/lualine.nvim", dependencies = { "nvim-tree/nvim-web-devicons" },
      config = function()
        require("lualine").setup { options = { theme = "gruvbox" } }
      end
    },

    -- 文件树
    { "nvim-tree/nvim-tree.lua", dependencies = { "nvim-tree/nvim-web-devicons" },
      config = function()
        require("nvim-tree").setup {}
        vim.keymap.set("n", "<leader>e", ":NvimTreeToggle<CR>", { desc = "切换文件树" })
      end
    },

    -- 模糊搜索
    { "nvim-telescope/telescope.nvim", tag = "0.1.6", dependencies = { "nvim-lua/plenary.nvim" },
      config = function()
        local builtin = require("telescope.builtin")
        vim.keymap.set("n", "<leader>ff", builtin.find_files, { desc = "查找文件" })
        vim.keymap.set("n", "<leader>fg", builtin.live_grep, { desc = "搜索内容" })
        vim.keymap.set("n", "<leader>fb", builtin.buffers, { desc = "切换缓冲区" })
      end
    },

    -- 语法高亮
    { "nvim-treesitter/nvim-treesitter", build = ":TSUpdate",
      config = function()
        require("nvim-treesitter.configs").setup {
          ensure_installed = { "lua", "python", "cpp", "bash", "markdown" },
          highlight = { enable = true },
        }
      end
    },
})

-- ==============================
-- 主题设置
-- ==============================
vim.cmd.colorscheme("gruvbox")

-- ==============================
-- 快捷键增强
-- ==============================
-- 保存 & 退出
vim.keymap.set("n", "<leader>w", ":w<CR>", { desc = "保存文件" })
vim.keymap.set("n", "<leader>q", ":q<CR>", { desc = "退出文件" })

-- 快速窗口移动
vim.keymap.set("n", "<C-h>", "<C-w>h", { desc = "左窗口" })
vim.keymap.set("n", "<C-l>", "<C-w>l", { desc = "右窗口" })
vim.keymap.set("n", "<C-j>", "<C-w>j", { desc = "下窗口" })
vim.keymap.set("n", "<C-k>", "<C-w>k", { desc = "上窗口" })