local function augroup(name)
  return vim.api.nvim_create_augroup(name, { clear = true })
end

local autocmd = vim.api.nvim_create_autocmd

-- Check if we need to reload the file when it changed
autocmd({ "FocusGained", "TermClose", "TermLeave" }, {
  group = augroup("checktime"),
  callback = function()
    if vim.o.buftype ~= "nofile" then
      vim.cmd("checktime")
    end
  end,
})

-- Highlight on yank
autocmd("TextYankPost", {
  group = augroup("highlight_yank"),
  callback = vim.hl.on_yank,
})

-- go to last loc when opening a buffer
autocmd("BufReadPost", {
  group = augroup("last_loc"),
  callback = function(event)
    local exclude = { "gitcommit" }
    local buf = event.buf
    if
      vim.tbl_contains(exclude, vim.bo[buf].filetype) or vim.b[buf].last_loc
    then
      return
    end
    vim.b[buf].last_loc = true
    local mark = vim.api.nvim_buf_get_mark(buf, '"')
    local lcount = vim.api.nvim_buf_line_count(buf)
    if mark[1] > 0 and mark[1] <= lcount then
      pcall(vim.api.nvim_win_set_cursor, 0, mark)
    end
  end,
})

-- close some filetypes with <q>
autocmd("FileType", {
  group = augroup("close_with_q"),
  pattern = {
    "PlenaryTestPopup",
    "checkhealth",
    "dbout",
    "gitsigns-blame",
    "grug-far",
    "help",
    "lspinfo",
    "neotest-output",
    "neotest-output-panel",
    "neotest-summary",
    "notify",
    "qf",
    "spectre_panel",
    "startuptime",
    "tsplayground",
  },
  callback = function(event)
    vim.bo[event.buf].buflisted = false
    vim.schedule(function()
      vim.keymap.set("n", "q", function()
        vim.cmd("close")
        pcall(vim.api.nvim_buf_delete, event.buf, { force = true })
      end, {
        buffer = event.buf,
        silent = true,
        desc = "Quit buffer",
      })
    end)
  end,
})

-- make it easier to close man-files when opened inline
autocmd("FileType", {
  group = augroup("man_unlisted"),
  pattern = { "man" },
  callback = function(event)
    vim.bo[event.buf].buflisted = false
  end,
})

-- Auto create dir when saving a file, in case some intermediate directory does not exist
autocmd({ "BufWritePre" }, {
  group = augroup("auto_create_dir"),
  callback = function(event)
    if event.match:match("^%w%w+:[\\/][\\/]") then
      return
    end
    local file = vim.uv.fs_realpath(event.match) or event.match
    vim.fn.mkdir(vim.fn.fnamemodify(file, ":p:h"), "p")
  end,
})

autocmd("BufWritePost", {
  group = augroup("bspwm"),
  pattern = "*bspwmrc",
  command = "!bspc wm --restart",
})
autocmd("BufWritePost", {
  group = augroup("polybar"),
  pattern = "*/polybar/config",
  command = "!polybar-msg cmd restart",
})
autocmd("BufWritePost", {
  group = augroup("xdg-user-dirs"),
  pattern = "user-dirs.dirs,user-dirs.locale",
  command = "!xdg-user-dirs-update",
})
autocmd("BufWritePost", {
  group = augroup("dunst"),
  pattern = "dunstrc",
  command = "!killall -SIGUSR2 dunst",
})
autocmd("BufWritePost", {
  group = augroup("fc-cache"),
  pattern = "fonts.conf",
  command = "!fc-cache",
})

autocmd("LspAttach", {
  group = augroup("lsp-attach"),
  callback = function(event)
    local bufnr = event.buf

    local function map(mode, l, r, desc)
      vim.keymap.set(mode, l, r, { buffer = bufnr, desc = desc })
    end
    local function nmap(l, r, desc)
      map("n", l, r, desc)
    end
    local function nvmap(l, r, desc)
      map({ "n", "v" }, l, r, desc)
    end
    nmap("<c-]>", vim.lsp.buf.definition, "Goto definition")
    nmap("gD", vim.lsp.buf.declaration, "[G]oto [D]eclaration")
    nvmap("gra", vim.lsp.buf.code_action, "[R]un code [A]ction")

    -- The following two autocommands are used to highlight references of the
    -- word under your cursor when your cursor rests there for a little while.
    --    See `:help CursorHold` for information about when this is executed
    --
    -- When you move your cursor, the highlights will be cleared (the second autocommand).
    local client = vim.lsp.get_client_by_id(event.data.client_id)
    if
      client
      and client:supports_method(
        vim.lsp.protocol.Methods.textDocument_documentHighlight,
        event.buf
      )
    then
      local highlight_augroup =
        vim.api.nvim_create_augroup("lsp-highlight", { clear = false })
      vim.api.nvim_create_autocmd({ "CursorHold", "CursorHoldI" }, {
        buffer = event.buf,
        group = highlight_augroup,
        callback = vim.lsp.buf.document_highlight,
      })

      vim.api.nvim_create_autocmd({ "CursorMoved", "CursorMovedI" }, {
        buffer = event.buf,
        group = highlight_augroup,
        callback = vim.lsp.buf.clear_references,
      })

      vim.api.nvim_create_autocmd("LspDetach", {
        group = vim.api.nvim_create_augroup("lsp-detach", { clear = true }),
        callback = function(event2)
          vim.lsp.buf.clear_references()
          vim.api.nvim_clear_autocmds({
            group = "lsp-highlight",
            buffer = event2.buf,
          })
        end,
      })
    end

    if
      client
      and client:supports_method(
        vim.lsp.protocol.Methods.textDocument_codeLens,
        event.buf
      )
    then
      vim.api.nvim_create_autocmd(
        { "CursorHold", "CursorHoldI", "InsertLeave" },
        {
          buffer = bufnr,
          group = vim.api.nvim_create_augroup("codelens", { clear = true }),
          callback = vim.lsp.codelens.refresh,
        }
      )
      nmap("<leader>cl", vim.lsp.codelens.run, "Run [C]ode [L]ens")
    end

    -- The following code creates a keymap to toggle inlay hints in your
    -- code, if the language server you are using supports them
    --
    -- This may be unwanted, since they displace some of your code
    if
      client
      and client:supports_method(
        vim.lsp.protocol.Methods.textDocument_inlayHint,
        event.buf
      )
    then
      nmap("<leader>th", function()
        vim.lsp.inlay_hint.enable(
          not vim.lsp.inlay_hint.is_enabled({ bufnr = event.buf })
        )
      end, "[T]oggle Inlay [H]ints")
    end
  end,
})

autocmd("FileType", {
  group = augroup("treesitter_start"),
  pattern = { "*" },
  callback = function()
    if pcall(vim.treesitter.start) then
      -- vim.wo.foldexpr = "v:lua.vim.treesitter.foldexpr()"
      vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
    end
  end,
})