local gcm = require'presser.context_manager'
local steamers = require'presser.steamers'
local actions = require'presser.actions'

local a = vim.api

local modules = {}

-- @Description: Find and replace words within the current buffer.
-- @Params:
-- @Returns: nil.
--
-- @Dev: function is responsible to creating all required buffers to allow full user interaction.
--
-- @Future: implementation may allow for greater user customisation similar to what's found with
-- extensions such as Telescope. For now, it should provide a concrete UI for purpose of design.
modules.find_replace = function ()
  -- define the context which these windows will belong to in the context manager.
  local ctx = "find_replace"
  gcm.create( ctx )
  
  local keymap = {
    n = {
      ["<esc>"] = "<cmd>lua require'presser.actions'.close()<CR>",
      ["<A-a>"] = "<cmd>lua require'presser.actions'.execute()<CR>",
    },
    i = {
      ["<down>"] = "<cmd>lua require'presser.actions'.move_next_buffer()<CR>",
      ["<A-a>"] = "<cmd>lua require'presser.actions'.execute()<CR>",
    }
  }

  -- get the centre of the current buffer
  local c_cols = math.floor( a.nvim_win_get_width(0) / 2 )
  local c_lines = math.floor( a.nvim_win_get_height(0) / 2 )

  -- create a title buffer for the steamer
  steamers
    .new( ctx, {
      label = "presser_title",
      steamer = {
        placeholder = "Find & Replace",
        allowed = false,
        window = {
          line = c_lines - 3,
          border = false,
          minwidth = 82,
          padding = { 0, 1, 1, 1 }
        }
      }
    } )

  -- create a new buffer for find pattern
  steamers
    .new ( ctx, {
      label = "find_buf",
      steamer = {
        window = {
          line = c_lines,
          title = "Find",
        },
        keybinds = keymap,
      }
    } )

  -- create a new buffer for replace pattern
  steamers
    .new( ctx, {
      label = "replace_buf",
      steamer = {
        window = {
          line = c_lines + 3,
          title = "Replace",
        },
        keybinds = keymap,
      }
    } )

  local result = actions.buf_put_curser_at( "find_buf" )
  a.nvim_feedkeys('A', 'n', false)
end

return modules