-- ============================================================================
-- LSP 语言服务器
-- ============================================================================

return {
    -- Mason: 外部工具管理 (:Mason 打开管理界面)
    {
        "williamboman/mason.nvim",
        cmd = "Mason",
        opts = {},
    },

    -- Mason 与 LSP 桥接，自动安装指定服务器
    {
        "williamboman/mason-lspconfig.nvim",
        dependencies = { "williamboman/mason.nvim" },
        opts = {
            ensure_installed = {
                "lua_ls",       -- Lua
                "bashls",       -- Bash
                "clangd",       -- C/C++
                "neocmake",     -- CMake
                -- rust_analyzer 由 rustup 管理，不通过 Mason
            },
        },
    },

    -- lspsaga: LSP UI 增强(hover 滚动、智能定位、诊断、重命名等)
    -- 替代手写 hover 滚动逻辑,自带 VSCode 风格滚动键 <C-d>/<C-u>/<C-f>/<C-b>
    {
        "nvimdev/lspsaga.nvim",
        event = "LspAttach",
        dependencies = {
            "nvim-treesitter/nvim-treesitter",
            "nvim-tree/nvim-web-devicons",
        },
        opts = {
            lightbulb = { enable = false },
            hover = {
                max_width = 0.6,
                max_height = 0.8,
            },
            ui = {
                border = "rounded",
                code_action = "bulb",
            },
            scroll_preview = {
                scroll_down = "<C-d>",
                scroll_up   = "<C-u>",
            },
        },
    },

    -- LSP 配置（Neovim 0.11+ vim.lsp.config API）
    {
        "neovim/nvim-lspconfig",
        event = { "BufReadPre", "BufNewFile" },
        dependencies = {
            "williamboman/mason.nvim",
            "williamboman/mason-lspconfig.nvim",
            "saghen/blink.cmp",
            "nvimdev/lspsaga.nvim",
        },
        config = function()
            local caps = require("blink.cmp").get_lsp_capabilities()

            -- LSP 附加时绑定 keymap + 开 inlay hints
            vim.api.nvim_create_autocmd("LspAttach", {
                callback = function(args)
                    local map = function(keys, func, desc)
                        vim.keymap.set("n", keys, func, { buffer = args.buf, desc = desc })
                    end
                    map("gd", vim.lsp.buf.definition, "跳转到定义")
                    map("gr", vim.lsp.buf.references, "查找引用")
                    map("K",  "<cmd>Lspsaga hover_doc<CR>", "悬浮文档")
                    map("<leader>rn", "<cmd>Lspsaga rename<CR>", "重命名")
                    map("<M-CR>",      "<cmd>Lspsaga code_action<CR>", "代码操作")
                    map("<leader>d",  "<cmd>Lspsaga show_line_diagnostics<CR>", "行诊断")
                    map("[d",          "<cmd>Lspsaga diagnostic_jump_prev<CR>", "上一个诊断")
                    map("]d",          "<cmd>Lspsaga diagnostic_jump_next<CR>", "下一个诊断")

                    -- 开启 inlay hints
                    vim.lsp.inlay_hint.enable(true, { bufnr = args.buf })
                end,
            })

            -- 诊断全局配置
            vim.diagnostic.config({
                virtual_text = false,
                signs = true,
                underline = true,
                update_in_insert = false,
                float = { border = "rounded" },
            })

            -- Lua
            vim.lsp.config['lua_ls'] = {
                cmd = { 'lua-language-server' },
                filetypes = { 'lua' },
                root_markers = { '.luarc.json', '.luarc.jsonc', '.git', 'init.lua' },
                capabilities = caps,
                settings = {
                    Lua = {
                        runtime = { version = "LuaJIT" },
                        workspace = { checkThirdParty = false },
                        diagnostics = { globals = { "vim" } },
                    },
                },
            }

            -- Bash
            vim.lsp.config['bashls'] = {
                cmd = { 'bash-language-server', 'start' },
                filetypes = { 'sh', 'bash' },
                root_markers = { '.git' },
                capabilities = caps,
            }

            -- C/C++ (clangd)
            vim.lsp.config['clangd'] = {
                cmd = { 'clangd' },
                filetypes = { 'c', 'cpp', 'objc', 'objcpp' },
                root_markers = { '.clangd', 'compile_commands.json', '.git' },
                capabilities = caps,
            }

            -- CMake
            vim.lsp.config['neocmake'] = {
                cmd = { 'neocmakelsp', 'stdio' },
                filetypes = { 'cmake' },
                root_markers = { 'CMakeLists.txt', '.git' },
                capabilities = caps,
                init_options = {
                    format = { enable = true },
                    lint = { enable = true },
                },
            }

            -- 启用所有 LSP（Rust 由 rustaceanvim 管理）
            vim.lsp.enable({ 'lua_ls', 'bashls', 'clangd', 'neocmake' })
        end,
    },
}