-- config.lua — site configuration backed by the `settings` table.
--
-- Every value has a default here; anything set through the admin
-- Settings page (stored in SQLite) overrides it.  Reads go to the DB
-- each time: redbean forks per request, so a module-level cache would
-- go stale after the admin saves new settings.

local db = require "db"

local M = {}

M.DEFAULTS = {
  site_title     = "btmx",
  site_tagline   = "",
  site_author    = "",
  -- Absolute URL of the deployed site, no trailing slash.
  -- Required for the Atom feed to produce valid absolute IDs/links.
  base_url       = "http://localhost:8080",
  posts_per_page = "10",
  -- Feature flags ("1" = on).  The wiki is parked by default:
  -- content is preserved in the DB but routes 404 and nav hides it.
  feature_wiki   = "0",
  -- Markdown body of the /links page.  Empty = page disabled and
  -- hidden from the nav.  Edited at /edit/links.
  links_page     = "",
  -- Up to four custom nav links (label + URL pairs).  Empty = unused.
  nav_link1_label = "", nav_link1_url = "",
  nav_link2_label = "", nav_link2_url = "",
  nav_link3_label = "", nav_link3_url = "",
  nav_link4_label = "", nav_link4_url = "",
  -- Floating radio player (bottom-left).  radio_url is an m3u playlist
  -- fetched server-side and offered as a channel list.
  radio_enabled  = "0",
  radio_url      = "",
}

--- The custom nav links as a list of {label, url} pairs.
function M.nav_links()
  local out = {}
  for n = 1, 4 do
    local label = M.get("nav_link" .. n .. "_label")
    local url   = M.get("nav_link" .. n .. "_url")
    if label ~= "" and url ~= "" then
      out[#out + 1] = { label = label, url = url }
    end
  end
  return out
end

--- Get a setting as a string, falling back to the default.
function M.get(key)
  local v = db.get_setting(key)
  if v == nil or v == "" then return M.DEFAULTS[key] end
  return v
end

--- Get a setting as a number (falls back to default, then 0).
function M.get_number(key)
  return tonumber(M.get(key)) or tonumber(M.DEFAULTS[key]) or 0
end

--- True when a feature flag is enabled.
function M.enabled(key)
  return M.get(key) == "1"
end

--- Persist a setting.  Empty string clears the override (default applies).
function M.set(key, value)
  db.set_setting(key, value or "")
end

--- base_url with no trailing slash (for feed/link building).
function M.base_url()
  return (M.get("base_url"):gsub("/+$", ""))
end

return M