-------------------------------------------------------------------------------
-- Configuration for nota
-------------------------------------------------------------------------------
local Configuration = {}

local Util = require('util')
-------------------------------------------------------------------------------
-- Internal Functions
-------------------------------------------------------------------------------
local fs = vim.loop

local defaults = {
  nota_home = '~/.local/share/nota',          -- Root location in which to store all notes
  default_keybinds = true,                    -- Whether or not to set the default keybinds
  periodic_locations = {
    daily = 'periodic/daily',                 -- Location to store daily notes, relative to nota_home
    weekly = 'periodic/weekly',               -- Location to store weekly notes, relative to nota_home
    monthly = 'periodic/monthly',             -- Location to store monthly notes, relative to nota_home
    seasonal = 'periodic/seasonal',           -- Location to store seasonal notes, relative to nota_home
    yearly = 'periodic/yearly'                -- Location to store yearly notes, relative to nota_home
  },
  templates = {
      daily = 'templates/daily.md',             -- Template for daily notes, relative to nota_home
      weekly = 'templates/weekly.md',           -- Template for weekly notes, relative to nota_home
      monthly = 'templates/monthly.md',         -- Template for monthly notes, relative to nota_home
      seasonal = 'templates/seasonal.md',       -- Template for seasonal notes, relative to nota_home
      yearly = 'templates/yearly.md',           -- Template for yearly notes, relative to nota_home
      plan = 'templates/plan.md'                -- Template for plan notes, relative to nota_home
  },
  tasks = {
      inbox = 'inbox.md',                       -- Location of the file in which to store newly captured tasks, relative to nota_home
      someday = 'someday.md'                    -- Location of the file in which to store indefinitely deferred tasks, relative to nota_home
  },
  learning  = {
      learning_file = 'learning.md',            -- Location of the file in which to store learning entries, relative to nota_home
      prefix = '%Y-%m-%d: '                     -- Prefix to add when capturing learning entries
  },
  plan = {
      archive = 'plans',                        -- Location of the plan archives.
      plan_file = '~/.plan'                     -- Location of the active plan, the default is what is expected by finger.
  }
}

-- Recursively extends a table with another
local function extend(target, extender)
  for key, value in pairs(extender) do
    if type(target[key]) == 'table' and type(value) == 'table' then
      extend(target[key], value)
    else
      target[key] = value
    end
  end
end

-------------------------------------------------------------------------------
-- Public Interface
-------------------------------------------------------------------------------

Configuration.configuration = {}
extend(Configuration.configuration, defaults)

--- Extends configuration with another configuration
function Configuration.configure(configuration)
  configuration = configuration or {}
  extend(Configuration.configuration, configuration)
end

--- Gets expanded paths relative to nota_home
-- @param path string the relative path to expand
function Configuration.path_for(path)
  if not path then
    return vim.fn.expand(Configuration.configuration.nota_home)
  end
  return Util.join(vim.fn.expand(Configuration.configuration.nota_home), path)
end

--- Loads a template by template name
function Configuration.load_template(type)
  local template_path = Configuration.path_for(Configuration.configuration.templates[type])

  local template_file = io.open(template_path, 'r')
  if not template_file then
      return ''
  end
  local content = template_file:read('*a')
  template_file:close()
  return content
end

return Configuration