local conditions = require("heirline.conditions")
local utils = require("heirline.utils")

local FileNameBlock = {
  -- let's first set up some attributes needed by this component and it's children
  init = function(self) self.filename = vim.api.nvim_buf_get_name(0) end,
}
-- We can now define some children separately and add them later

local FileIcon = {
  init = function(self)
    local filename = self.filename
    self.icon = vim.fn["nerdfont#find"](filename)
  end,
  provider = function(self) return self.icon and (self.icon .. " ") end,
  hl = { fg = utils.get_highlight("Directory").fg },
}

local FileName = {
  provider = function(self)
    -- first, trim the pattern relative to the current directory. For other
    -- options, see :h filename-modifers
    local filename = vim.fn.fnamemodify(self.filename, ":.")
    if filename == "" then return "[No Name]" end
    -- now, if the filename would occupy more than 1/4th of the available
    -- space, we trim the file path to its initials
    -- See Flexible Components section below for dynamic truncation
    if not conditions.width_percent_below(#filename, 0.25) then filename = vim.fn.pathshorten(filename) end
    return filename
  end,
  hl = { fg = utils.get_highlight("Directory").fg },
}

local FileFlags = {
  {
    condition = function() return vim.bo.modified end,
    provider = "[+]",
    hl = { fg = "green" },
  },
  {
    condition = function() return not vim.bo.modifiable or vim.bo.readonly end,
    provider = "",
    hl = { fg = "orange" },
  },
}

-- let's add the children to our FileNameBlock component
FileNameBlock = utils.insert(
  FileNameBlock,
  FileIcon,
  FileName, -- a new table where FileName is a child of FileNameModifier
  FileFlags,
  { provider = "%<" } -- this means that the statusline is cut here when there's not enough space
)

return FileNameBlock