--- jasper/config.lua
--- Reads the .jasper_config.json file from the project root.
---
--- Expected format:
--- {
---   "attivita_id": 12345,
---   "inactivity_timeout": 10   -- optional, minutes
--- }

local M = {}

--- Walk up from `cwd` looking for .jasper_config.json.
--- @return string|nil  absolute path to the config file, or nil
local function find_config_file()
  local path = vim.fn.getcwd()
  while true do
    local candidate = path .. "/.jasper_config.json"
    if vim.fn.filereadable(candidate) == 1 then
      return candidate
    end
    local parent = vim.fn.fnamemodify(path, ":h")
    if parent == path then
      break -- reached filesystem root
    end
    path = parent
  end
  return nil
end

--- Load and decode .jasper_config.json.
--- @return table|nil  decoded config, or nil if not found / invalid
function M.load()
  local config_file = find_config_file()
  if not config_file then
    return nil
  end

  local lines = vim.fn.readfile(config_file)
  if not lines or #lines == 0 then
    vim.notify("[Jasper] .jasper_config.json is empty", vim.log.levels.WARN)
    return nil
  end

  local ok, data = pcall(vim.fn.json_decode, table.concat(lines, "\n"))
  if not ok or type(data) ~= "table" then
    vim.notify("[Jasper] .jasper_config.json is not valid JSON", vim.log.levels.WARN)
    return nil
  end

  return data
end

return M