local M = {}

-- Safe require helper
local function safe_require(name)
  local ok, mod = pcall(require, name)
  return ok and mod or nil
end


local ok, api = pcall(require, 'nvim-tree.api')
if not ok then return end
local function on_attach(bufnr)
  local function opts(desc)
    return { desc = "nvim-tree: " .. desc, buffer = bufnr, noremap = true, silent = true, nowait = true }
  end

  local mappings = {
    ["<C-]>"] = { api.tree.change_root_to_node, "CD" },
    ["<C-e>"] = { api.node.open.replace_tree_buffer, "Open: In Place" },
    ["<C-k>"] = { api.node.show_info_popup, "Info" },
    ["<C-r>"] = { api.fs.rename_sub, "Rename: Omit Filename" },
    ["<C-t>"] = { api.node.open.tab, "Open: New Tab" },
    ["<C-v>"] = { api.node.open.vertical, "Open: Vertical Split" },
    ["<C-x>"] = { api.node.open.horizontal, "Open: Horizontal Split" },
    ["<BS>"] = { api.node.navigate.parent_close, "Close Directory" },
    -- ["<CR>"] = { api.node.open.edit, "Open" },
    ["<Tab>"] = { api.node.open.preview, "Open Preview" },
    [">"] = { api.node.navigate.sibling.next, "Next Sibling" },
    ["<"] = { api.node.navigate.sibling.prev, "Previous Sibling" },
    ["."] = { api.node.run.cmd, "Run Command" },
    ["-"] = { api.tree.change_root_to_parent, "Up" },
    ["a"] = { api.fs.create, "Create" },
    ["bmv"] = { api.marks.bulk.move, "Move Bookmarked" },
    ["B"] = { api.tree.toggle_no_buffer_filter, "Toggle No Buffer" },
    ["c"] = { api.fs.copy.node, "Copy" },
    -- ["C"] = { api.tree.toggle_git_clean_filter, "Toggle Git Clean" },
    ["[c"] = { api.node.navigate.git.prev, "Prev Git" },
    ["]c"] = { api.node.navigate.git.next, "Next Git" },
    ["d"] = { api.fs.remove, "Delete" },
    ["D"] = { api.fs.trash, "Trash" },
    ["E"] = { api.tree.expand_all, "Expand All" },
    ["e"] = { api.fs.rename_basename, "Rename: Basename" },
    ["]e"] = { api.node.navigate.diagnostics.next, "Next Diagnostic" },
    ["[e"] = { api.node.navigate.diagnostics.prev, "Prev Diagnostic" },
    ["F"] = { api.live_filter.clear, "Clean Filter" },
    ["f"] = { api.live_filter.start, "Filter" },
    ["g?"] = { api.tree.toggle_help, "Help" },
    ["gy"] = { api.fs.copy.absolute_path, "Copy Absolute Path" },
    ["H"] = { api.tree.toggle_hidden_filter, "Toggle Dotfiles" },
    ["I"] = { api.tree.toggle_gitignore_filter, "Toggle Git Ignore" },
    ["J"] = { api.node.navigate.sibling.last, "Last Sibling" },
    ["K"] = { api.node.navigate.sibling.first, "First Sibling" },
    ["m"] = { api.marks.toggle, "Toggle Bookmark" },
    -- ["o"] = { api.node.open.edit, "Open" },
    ["O"] = { api.node.open.no_window_picker, "Open: No Window Picker" },
    ["p"] = { api.fs.paste, "Paste" },
    ["P"] = { api.node.navigate.parent, "Parent Directory" },
    ["q"] = { api.tree.close, "Close" },
    ["r"] = { api.fs.rename, "Rename" },
    ["R"] = { api.tree.reload, "Refresh" },
    ["s"] = { api.node.run.system, "Run System" },
    ["S"] = { api.tree.search_node, "Search" },
    ["U"] = { api.tree.toggle_custom_filter, "Toggle Hidden" },
    ["W"] = { api.tree.collapse_all, "Collapse" },
    ["x"] = { api.fs.cut, "Cut" },
    ["y"] = { api.fs.copy.filename, "Copy Name" },
    ["Y"] = { api.fs.copy.relative_path, "Copy Relative Path" },
    ["<2-LeftMouse>"] = { api.node.open.edit, "Open" },
    ["<2-RightMouse>"] = { api.tree.change_root_to_node, "CD" },

    -- Mappings migrated from view.mappings.list
    ["l"] = { api.node.open.edit, "Open" },
    ["<CR>"] = { api.node.open.edit, "Open" },
    ["o"] = { api.node.open.edit, "Open" },
    ["h"] = { api.node.navigate.parent_close, "Close Directory" },
    ["v"] = { api.node.open.vertical, "Open: Vertical Split" },
    ["C"] = { api.tree.change_root_to_node, "CD" },
  }
  for keys, mapping in pairs(mappings) do
    vim.keymap.set("n", keys, mapping[1], opts(mapping[2]))
  end
end

---- Icons configuration for nvim-tree
--local icons = {
--  webdev_colors = true,
--  git_placement = "before",
--  modified_placement = "after",
--  padding = " ",
--  symlink_arrow = " ➛ ",
--  show = {
--    file = true,
--    folder = true,
--    folder_arrow = true,
--    git = true,
--    modified = true,
--  },
--  glyphs = {
--    default = "",
--    symlink = "",
--    bookmark = "",
--    modified = "●",
--    folder = {
--      arrow_closed = "",
--      arrow_open = "",
--      default = "",
--      open = "",
--      empty = "",
--      empty_open = "",
--      symlink = "",
--      symlink_open = "",
--    },
--    git = {
--      unstaged = "✗",
--      staged = "✓",
--      unmerged = "",
--      renamed = "➜",
--      untracked = "★",
--      deleted = "",
--      ignored = "◌",
--    },
--  },
--}

local icons = {
  webdev_colors = true,
  git_placement = "signcolumn",
  modified_placement = "after",
  padding = " ",
  show = {
    file = true,
    folder = true,
    folder_arrow = true,
    git = true,
    modified = true,
  },

  glyphs = {
    default = "󰈔",
    symlink = "",
    folder = {
      arrow_open = "",
      arrow_closed = "",
      default = " ",
      open = " ",
      empty = " ",
      empty_open = " ",
      symlink = "",
      symlink_open = "",
    },

    git = {
      deleted = "",
      unmerged = "",
      untracked = "",
      unstaged = "",
      staged = "",
      renamed = "➜",
      ignored = "◌",
    },
  },
  web_devicons = {
    folder = {
      enable = true,
      color = true,
    },
  },
}

local float = {
  enable = false,
  open_win_config = function()
    local screen_w = vim.o.columns
    local screen_h = vim.o.lines - vim.o.cmdheight
    local window_w = screen_w * WIDTH_RATIO
    local window_h = screen_h * HEIGHT_RATIO
    local window_w_int = math.floor(window_w)
    local window_h_int = math.floor(window_h)
    local center_x = (screen_w - window_w) / 2
    local center_y = ((vim.o.lines - window_h) / 2) - vim.o.cmdheight
    return {
      border = "rounded",
      relative = "editor",
      row = center_y,
      col = center_x,
      width = window_w_int,
      height = window_h_int,
    }
  end,
}

local renderer = {
  group_empty = true, -- default: true. Compact folders that only contain a single folder into one node in the file tree.
  highlight_git = false,
  full_name = false,
  highlight_opened_files = "icon", -- "none" (default), "icon", "name" or "all"
  highlight_modified = "icon",     -- "none", "name" or "all". Nice and subtle, override the open icon
  root_folder_label = ":~:s?$?/..?",
  indent_width = 2,
  indent_markers = {
    enable = true,
    inline_arrows = true,
    icons = {
      corner = "└",
      edge = "│",
      item = "│",
      bottom = "─",
      none = " ",
    },
  },
  icons = icons,
}

local system_open = { cmd = "zathura" }

local HEIGHT_RATIO = 0.8
local WIDTH_RATIO = 0.15
local view = {
  cursorline = true,
  float = float,
  --signcolumn = 'no',
  --width = function()
  --  return math.floor(vim.opt.columns:get() * WIDTH_RATIO)
  --end,
  width = { max = 38, min = 38 },
  side = "left",
}

-- Open nvim-tree when opening a directory
local function open_nvim_tree(data)
  -- buffer is a directory
  local directory = vim.fn.isdirectory(data.file) == 1

  if not directory then
    return
  end

  -- change to the directory
  vim.cmd.cd(data.file)

  -- open the tree
  require("nvim-tree.api").tree.open()
end


-- Setup function
function M.setup()
  -- Check if nvim-tree is installed
  --local nvim_tree = safe_require('nvim-tree')
  --if not nvim_tree then
  --  return false
  --end

  local nvim_tree = safe_require('nvim-tree')
  if type(nvim_tree) ~= "table" or not nvim_tree.setup then
    --vim.notify("[nvim-tree] Plugin did not load correctly", vim.log.levels.ERROR)
    return false
  end

  -- Setup nvim-tree
  nvim_tree.setup({
    sync_root_with_cwd = true,
    respect_buf_cwd = true,
    disable_netrw = true,
    hijack_netrw = true,
    open_on_tab = false,
    hijack_cursor = false,
    update_cwd = true,
    hijack_directories = {
      enable = true,
      auto_open = true,
    },
    diagnostics = {
      enable = true,
      icons = {
        error = "✘",
        warning = "",
        hint = "◉",
        info = "",
      },
    },
    filesystem_watchers = {
      enable = true,
      debounce_delay = 50,
      ignore_dirs = { "node_modules", ".config/nvm" },
    },
    update_focused_file = {
      enable = true,
      update_cwd = true,
      --update_root = true,
      ignore_list = {},
    },
    --root_dirs = {},
    --system_open = {
    --  --cmd = nil,
    --  --args = {},
    --},
    system_open = system_open,
    filters = {
      dotfiles = false,
      custom = {},
    },
    --git = {
    --  enable = true,
    --  ignore = true,
    --  timeout = 500,
    --},
    git = { ignore = false },
    view = view,
    renderer = renderer,
    --renderer = {
    --  indent_markers = {
    --    enable = false,
    --    icons = {
    --      corner = "└ ",
    --      edge = "│ ",
    --      none = "  ",
    --    },
    --  },
    --  icons = icons,
    --},
    on_attach = on_attach,
    notify = {
      threshold = vim.log.levels.ERROR,
    },
    log = {
      enable = true,
      truncate = true,
      types = {
        diagnostics = true,
        git = true,
        profile = true,
        watcher = true,
      },
    },
    trash = {
      cmd = "gio trash",
      require_confirm = true,
    },
    modified = {
      enable = true,
      show_on_dirs = true,
      show_on_open_dirs = true,
    },
    actions = {
      use_system_clipboard = true,
      change_dir = {
        enable = true,
        global = false,
        restrict_above_cwd = false,
      },
      remove_file = {
        close_window = true,
      },
      open_file = {
        quit_on_open = false,
        resize_window = true,
        window_picker = {
          enable = true,
          chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890",
          exclude = {
            filetype = { "notify", "packer", "qf", "diff", "fugitive", "fugitiveblame" },
            buftype = { "nofile", "terminal", "help" },
          },
        },
      },
    },
  })


  local api = require("nvim-tree.api")
  --local event = api.events.Event
  --api.events.subscribe(event.TreeOpen, function(_)
  --  vim.cmd([[setlocal statuscolumn=\ ]])
  --  vim.cmd([[setlocal cursorlineopt=number]])
  --  vim.cmd([[setlocal fillchars+=vert:🮇]])
  --  vim.cmd([[setlocal fillchars+=horizup:🮇]])
  --  vim.cmd([[setlocal fillchars+=vertright:🮇]])
  --end)

  local function open_nvim_tree(data)
    vim.cmd.cd(data.file:match("(.+)/[^/]*$"))
    local directory = vim.fn.isdirectory(data.file) == 1
    if not directory then
      return
    end
    require("nvim-tree.api").tree.open()
  end

  -- Auto open nvim-tree when opening a directory
  vim.api.nvim_create_autocmd({ "VimEnter" }, { pattern = { "*" }, callback = open_nvim_tree })

  -- Change Root To Global Current Working Directory
  local function change_root_to_global_cwd()
    local api = require("nvim-tree.api")
    local global_cwd = vim.fn.getcwd(-1, -1)
    api.tree.change_root(global_cwd)
  end

  local function copy_file_to(node)
    local file_src = node["absolute_path"]
    -- The args of input are {prompt}, {default}, {completion}
    -- Read in the new file path using the existing file's path as the baseline.
    local file_out = vim.fn.input("COPY TO: ", file_src, "file")
    -- Create any parent dirs as required
    local dir = vim.fn.fnamemodify(file_out, ":h")
    vim.fn.system({ "mkdir", "-p", dir })
    -- Copy the file
    vim.fn.system({ "cp", "-R", file_src, file_out })
  end

  local function edit_and_close(node)
    api.node.open.edit(node, {})
    api.tree.close()
  end

  --vim.api.nvim_create_augroup('NvimTreeRefresh', {})
  --vim.api.nvim_create_autocmd('BufEnter', {
  --  pattern = 'NvimTree_1',
  --  command = 'NvimTreeRefresh',
  --  group = 'NvimTreeRefresh',
  --})

  vim.api.nvim_create_autocmd({ "CursorHold" }, {
    pattern = "NvimTree*",
    callback = function()
      local def = vim.api.nvim_get_hl_by_name("Cursor", true)
      vim.api.nvim_set_hl(
        0,
        "Cursor",
        vim.tbl_extend("force", def, {
          blend = 100,
        })
      )
      vim.opt.guicursor = "n-v-c-sm:block,i-ci-ve:ver25,r-cr-o:hor20,a:Cursor/lCursor"
    end,
  })

  vim.api.nvim_create_autocmd({ "BufLeave", "WinClosed", "WinLeave" }, {
    pattern = "NvimTree*",
    callback = function()
      local def = vim.api.nvim_get_hl_by_name("Cursor", true)
      vim.api.nvim_set_hl(
        0,
        "Cursor",
        vim.tbl_extend("force", def, {
          blend = 0,
        })
      )
      vim.opt.guicursor = "n-v-c-sm:block,i-ci-ve:ver25,r-cr-o:hor20"
    end,
  })

  vim.api.nvim_command("highlight NvimTreeNormal guibg=NONE ctermbg=NONE")
  vim.api.nvim_command("highlight NvimTreeNormalNC guibg=NONE ctermbg=NONE guifg=NONE")
  vim.api.nvim_command("highlight NvimTreeNormalFloat guibg=NONE ctermbg=NONE")
  vim.api.nvim_command("highlight NvimTreeEndOfBuffer guibg=NONE ctermbg=NONE") --(NonText)
  vim.api.nvim_command("highlight NvimTreeCursorLine guibg=#50fa7b guifg=#000000")
  vim.api.nvim_command("highlight NvimTreeSymlinkFolderName guifg=#f8f8f2 guibg=NONE ctermbg=NONE")
  vim.api.nvim_command("highlight NvimTreeFolderName guifg=#f8f8f2 guibg=NONE ctermbg=NONE")
  vim.api.nvim_command("highlight NvimTreeRootFolder guifg=#f8f8f2 guibg=NONE ctermbg=NONE")
  vim.api.nvim_command("highlight NvimTreeEmptyFolderName guifg=#f8f8f2 guibg=NONE ctermbg=NONE")  --(Directory)
  vim.api.nvim_command("highlight NvimTreeOpenedFolderName guifg=#f8f8f2 guibg=NONE ctermbg=NONE") --(Directory)
  vim.api.nvim_command("highlight NvimTreeOpenedFile guifg=#50fa7b guibg=NONE ctermbg=NONE")
  vim.api.nvim_command("highlight NvimTreeExecFile guifg=#ff882a guibg=none gui=NONE")

  return true
end

---- Set highlights
--vim.cmd([[highlight NvimTreeNormal guibg=NONE ctermbg=NONE]])
--vim.cmd([[highlight NvimTreeNormalNC guibg=NONE ctermbg=NONE guifg=NONE]])
--vim.cmd([[highlight NvimTreeNormalFloat guibg=NONE ctermbg=NONE]])
--vim.cmd([[highlight NvimTreeEndOfBuffer guibg=NONE ctermbg=NONE]])
--vim.cmd([[highlight NvimTreeCursorLine guibg=#50fa7b guifg=#000000]])

-- Highlight Groups

return M