local handler = require("chatgpt_nvim.handler")

local M = {}

local function search_and_replace(original, replacements)
  -- Basic approach: do a global plain text replace for each entry
  local updated = original
  for _, r in ipairs(replacements) do
    local search_str = r.search or ""
    local replace_str = r.replace or ""
    -- Here we do a global plain text replacement
    updated = updated:gsub(search_str, replace_str)
  end
  return updated
end

M.run = function(tool_call, conf, prompt_user_tool_accept, is_subpath, read_file)
  local path = tool_call.path
  local replacements = tool_call.replacements or {}

  if not path or #replacements == 0 then
    return "[replace_in_file] Missing 'path' or 'replacements'."
  end
  local root = vim.fn.getcwd()

  if not is_subpath(root, path) then
    return string.format("Tool [replace_in_file for '%s'] REJECTED. Path outside project root.", path)
  end

  local orig_data = read_file(path)
  if not orig_data then
    return string.format("[replace_in_file for '%s'] FAILED. Could not read file.", path)
  end

  local updated_data = search_and_replace(orig_data, replacements)
  handler.write_file(path, updated_data, conf)

  local msg = {}
  msg[#msg+1] = string.format("[replace_in_file for '%s'] Result:\nThe content was successfully saved to %s.", path, path)
  msg[#msg+1] = "\nHere is the full, updated content of the file that was saved:\n"
  msg[#msg+1] = string.format("<final_file_content path=\"%s\">\n%s\n</final_file_content>", path, updated_data)
  msg[#msg+1] = "\nIMPORTANT: For any future changes to this file, use the final_file_content shown above as your reference.\n"

  return table.concat(msg, "")
end

return M