require("lualine").setup({
  options = {
    component_separators = { left = '|', right = '|' },
    section_separators = { left = '', right = '' },
  },
  sections = {
    lualine_a = { "mode" },
    lualine_b = { "branch", "diff", "diagnostics" },
    lualine_c = { "filename", "g:coc_status" },
    lualine_x = {
      function()
        return Project.root
      end,
      "encoding",
      "fileformat",
      "filetype",
    },
    lualine_y = { "progress" },
    lualine_z = { "location" },
  },
})

Project = {
  name = "",
  root = "",
  color = { fg = "#ffffff", bg = "#888888", loaded = false },
}

local function redraw_bufferline()
  local highlights = require("bufferline.highlights")
  local config = require("bufferline.config")
  highlights.reset_icon_hl_cache()
  highlights.set_all(config.update_highlights())
end

vim.opt.title = true

vim.api.nvim_create_augroup("bufline", {
  clear = true,
})
vim.api.nvim_create_autocmd("BufEnter", {
  group = "bufline",
  pattern = "*",
  callback = function()
    if vim.bo.modifiable == false or vim.fn.expand("%:t") == "" then
      return
    end
    local current_buf = vim.fn.expand("%:p:h")
    if current_buf == nil then
      return
    end
    if string.match(current_buf, "[a-zA-Z0-9][a-zA-Z0-9]:") then
      return
    end
    local root = vim.fn["rootfinder#find"](current_buf)
    local color_loaded = false
    if Project.root:len() > 0 and string.sub(root, 1, Project.root:len()) == Project.root then
      return
    end
    if
        ((root ~= Project.root) or not Project.color.loaded)
        and vim.fn.filereadable(root .. "/.vim/theme.txt") == 1
    then
      local f = io.open(root .. "/.vim/theme.txt", "r")
      if f == nil then
        return
      end
      Project.color.fg = f:read("l")
      Project.color.bg = f:read("l")
      f:close()
      Project.color.loaded = true
      color_loaded = true
    end

    if root == Project.root and vim.fn.getcwd() == Project.root then
      if color_loaded then
        print("Color loaded, fg: " .. Project.color.fg .. ", bg: " .. Project.color.bg)
        redraw_bufferline()
      end
      return
    end
    local name = vim.fn.fnamemodify(root, ":t")
    vim.api.nvim_set_current_dir(root)
    Project.name = name
    Project.root = root
    vim.opt.titlestring = name .. " - %{expand('%:t')}"
    if color_loaded then
      print(
        "Root changed to "
        .. root
        .. " (color loaded, fg: "
        .. Project.color.fg
        .. ", bg: "
        .. Project.color.bg
        .. ")"
      )
    else
      print("Root changed to " .. root)
    end
    redraw_bufferline()
    require("lualine").refresh()
  end,
})

local function setup_bufferline()
  require("bufferline").setup({
    options = {
      modified_icon = "!",
      close_icon = "×",
      buffer_close_icon = "×",
      custom_areas = {
        left = function()
          local text
          if Project.name == "" then
            text = "-"
          else
            text = Project.name
          end
          return {
            {
              text = " \u{e5fe} " .. text .. " ",
              guifg = Project.color.fg,
              guibg = Project.color.bg,
              padding = 1,
            },
          }
        end,
      },
    },
    highlights = {
      buffer_selected = {
        fg = "#48b0d5",
        bold = false,
        italic = false,
      },
      duplicate_selected = {
        fg = "#888888",
        bold = false,
        italic = false,
      },
      duplicate_visible = {
        fg = "#888888",
        bold = false,
        italic = false,
      },
      duplicate = {
        fg = "#888888",
        bold = false,
        italic = false,
      },
      close_button_selected = {
        bold = false,
        italic = false,
      },
      separator_selected = {
        fg = "#fafafa",
        bold = false,
        italic = false,
      },
      indicator_selected = {
        fg = "#48b0d5",
        bold = false,
        italic = false,
      },
      modified_selected = {
        fg = "#48b0d5",
        bold = false,
        italic = false,
      },
    },
  })
end

setup_bufferline()

return {
  setup_bufferline = setup_bufferline,
}