local fzf_lua = require('fzf-lua')

fzf_lua.setup({
  -- https://github.com/jose-elias-alvarez/null-ls.nvim/wiki/Compatibility-with-other-plugins#fzf-lua
  -- make lsp requests synchronous so they work with null-ls
  lsp = { async_or_timeout = 3000 },
  winopts = {
    height = 0.90,
    width = 0.90,
    row = 0.35,
    col = 0.50,
    preview = {
      vertical = 'down:60%',
      layout = 'vertical',
    },
  },
  keymap = {
    -- These override the default tables completely
    -- no need to set to `false` to disable a bind
    -- delete or modify is sufficient
    builtin = {
      ['<C-/>'] = 'toggle-help',
      ['<C-;>'] = 'toggle-preview-wrap',
      ["<C-'>"] = 'toggle-preview',
      ['<C-,>'] = 'toggle-preview-ccw',
      ['<C-.>'] = 'toggle-preview-cw',
      ['<S-down>'] = 'preview-page-down',
      ['<S-up>'] = 'preview-page-up',
      ['<S-left>'] = 'preview-page-reset',
    },
  },
  fzf_opts = {
    ['--cycle'] = '',
  },
  actions = {
    files = {
      ['default'] = fzf_lua.actions.file_edit,
    },
  },
  files = {
    cmd = 'find_for_vim',
  },
  git = {
    status = {
      preview_pager = 'delta --width=$FZF_PREVIEW_COLUMNS',
      -- actions     = {
      --   ["right"] = { actions.git_unstage, actions.resume },
      --   ["left"]  = { actions.git_stage, actions.resume },
      -- },
    },
  },
  grep = {
    rg_opts = fzf_lua.defaults.grep.rg_opts .. " --hidden --trim --glob '!**/.git/*'",
    actions = {
      ['ctrl-g'] = '',
      ['ctrl-l'] = { fzf_lua.actions.grep_lgrep },
    },
  },
  oldfiles = {
    cwd_only = true,
  },
  blines = {
    fzf_opts = {
      -- hide line no.
      ['--with-nth'] = '4..',
    },
  },
})

local ok, mru_cache = pcall(require, 'mru_cache')
if not ok then
  vim.notify('mru_cache is required to find from mru source!', vim.log.levels.ERROR)
end

local gen_mru_cmd = function(type)
  local file = mru_cache.cache_path(type)
  -- remove current file and cwd
  return "sed -e '\\|^"
    .. vim.api.nvim_buf_get_name(0)
    .. "$|d' -e 's|^"
    .. vim.fn.getcwd()
    .. "/||' "
    .. file
end
local gen_mru_opts = function(args)
  local file_actions = fzf_lua.defaults.actions.files
  file_actions.default = fzf_lua.actions.file_edit

  local opts = vim.tbl_extend('force', {
    previewer = 'builtin',
    actions = file_actions,
    file_icons = true,
    color_icons = true,
  }, args)

  opts.fn_transform = function(x)
    return fzf_lua.make_entry.file(x, opts)
  end
  return opts
end

fzf_lua.mru = function(args)
  args.prompt = 'MRU> '
  local cmd = gen_mru_cmd('mru')
  local opts = gen_mru_opts(args)
  fzf_lua.fzf_exec(cmd, opts)
end

fzf_lua.mrw = function(args)
  args.prompt = 'MRW> '
  local cmd = gen_mru_cmd('mrw')
  local opts = gen_mru_opts(args)
  fzf_lua.fzf_exec(cmd, opts)
end

local group = vim.api.nvim_create_augroup('fzf_lua_augroup', {})
vim.api.nvim_create_autocmd({ 'QuickfixCmdPost' }, {
  group = group,
  pattern = { 'make', 'grep', 'grepadd', 'vimgrep' },
  callback = fzf_lua.quickfix,
})
vim.api.nvim_create_autocmd({ 'QuickfixCmdPost' }, {
  group = group,
  pattern = { 'lmake', 'lgrep', 'lgrepadd', 'lvimgrep' },
  callback = fzf_lua.loclist,
})