-- ~/.config/nvim/lua/plugins/lsp.lua
return {
  -- Lazydev: proper Lua LSP for neovim config files
  {
    "folke/lazydev.nvim",
    ft = "lua",
    opts = {
      library = {
        { path = "luvit-meta/library", words = { "vim%.uv" } },
      },
    },
  },

  -- Mason (LSP installer)
  {
    "williamboman/mason.nvim",
    build = ":MasonUpdate",
    opts = {},
  },

  -- Mason LSP config integration
  {
    "williamboman/mason-lspconfig.nvim",
    dependencies = { "mason.nvim" },
    opts = {
      ensure_installed = { "lua_ls", "pyright", "texlab", "bashls", "marksman" },
    },
  },

  -- LSP configuration
  {
    "neovim/nvim-lspconfig",
    dependencies = {
      "mason.nvim",
      "mason-lspconfig.nvim",
      "saghen/blink.cmp",
    },
    config = function()
      local capabilities = require("blink.cmp").get_lsp_capabilities()
      local servers = { "lua_ls", "pyright", "texlab", "bashls", "marksman" }

      -- Configure diagnostics to be hidden by default
      vim.diagnostic.config({
        virtual_text = false,
        signs = false,
        underline = false,
        update_in_insert = false,
        severity_sort = false,
      })

      -- Set up keymaps for LSP
      vim.api.nvim_create_autocmd("LspAttach", {
        group = vim.api.nvim_create_augroup("UserLspConfig", {}),
        callback = function(ev)
          local opts = { buffer = ev.buf }
          vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
          vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
          vim.keymap.set('n', 'K', vim.lsp.buf.hover, opts)
          vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, opts)
          vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, opts)
          vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
          vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
        end,
      })

      -- Use Neovim 0.11+ LSP API to avoid deprecated lspconfig setup calls.
      if vim.lsp.config and vim.lsp.enable then
        for _, server in ipairs(servers) do
          vim.lsp.config(server, { capabilities = capabilities })
        end
        vim.lsp.enable(servers)
      else
        local lspconfig = require("lspconfig")
        for _, server in ipairs(servers) do
          lspconfig[server].setup({ capabilities = capabilities })
        end
      end
    end,
  },

  -- Copilot (suggestion/panel disabled — blink-copilot handles completions)
  {
    "zbirenbaum/copilot.lua",
    event = "InsertEnter",
    opts = {
      suggestion = { enabled = false },
      panel = { enabled = false },
    },
  },

  -- blink.cmp: fast Rust-powered completion engine
  {
    "saghen/blink.cmp",
    version = "*",
    dependencies = {
      "rafamadriz/friendly-snippets",
      {
        "L3MON4D3/LuaSnip",
        build = "make install_jsregexp",
        dependencies = { "evesdropper/luasnip-latex-snippets.nvim" },
        config = function()
          require("luasnip.loaders.from_vscode").lazy_load()
          require("luasnip.loaders.from_lua").load({ paths = "~/.config/nvim/lua/snippets" })
        end,
      },
      {
        "fmuaddel/blink-copilot",
        dependencies = { "zbirenbaum/copilot.lua" },
      },
    },
    opts = {
      keymap = {
        preset = "default",
        ["<Tab>"]   = { "select_next", "snippet_forward", "fallback" },
        ["<S-Tab>"] = { "select_prev", "snippet_backward", "fallback" },
        ["<CR>"]    = { "accept", "fallback" },
      },
      appearance = { nerd_font_variant = "mono" },
      sources = {
        default = { "lazydev", "lsp", "path", "snippets", "buffer", "copilot" },
        providers = {
          lazydev = {
            name = "LazyDev",
            module = "lazydev.integrations.blink",
            score_offset = 100,
          },
          copilot = {
            name = "copilot",
            module = "blink-copilot",
            score_offset = 50,
            async = true,
          },
        },
      },
      snippets = { preset = "luasnip" },
      completion = {
        ghost_text = { enabled = true },
      },
    },
  },
}