// The stream path for the common camera makes.
//
// Imported by BOTH user interfaces - the head-office web app and the shop PC's
// desktop app - and kept here rather than copied into each because a make that
// is right in one and stale in the other is worse than not offering the list at
// all: an installer trusts a filled-in field.
//
// This is the single biggest obstacle for somebody setting up their first
// camera: the address and the password are on a label or in the installer's
// notes, but the RTSP *path* is not written anywhere a shop owner would look.
// It is model-specific, undiscoverable, and getting it wrong produces "could
// not open stream", which reads like a password problem and is not.
//
// Picking a make fills it in. The field stays editable, because these are
// conventions rather than guarantees and an installer who knows better must be
// able to overrule us.
export const MAKES = [
  {
    id: 'hikvision',
    label: 'Hikvision',
    path: '/Streaming/Channels/101',
    note: 'Channel 1, main stream. Use /Streaming/Channels/102 for the lower-quality sub stream.',
  },
  {
    id: 'dahua',
    label: 'Dahua',
    path: '/cam/realmonitor?channel=1&subtype=0',
    note: 'Channel 1, main stream. subtype=1 is the sub stream.',
  },
  {
    // Dahua hardware under another name, and very common in Indian retail.
    id: 'cpplus',
    label: 'CP Plus',
    path: '/cam/realmonitor?channel=1&subtype=0',
    note: 'CP Plus cameras use the Dahua stream path.',
  },
  {
    id: 'uniview',
    label: 'Uniview',
    path: '/media/video1',
    note: 'Some older Uniview models use /video1 instead.',
  },
  {
    id: 'tplink',
    label: 'TP-Link / Tapo',
    path: '/stream1',
    note: 'Tapo cameras need a separate camera account created in the Tapo app — your Tapo login will not work.',
  },
  {
    id: 'reolink',
    label: 'Reolink',
    path: '/h264Preview_01_main',
    note: 'Use /h264Preview_01_sub for the lower-quality stream.',
  },
  {
    id: 'amcrest',
    label: 'Amcrest',
    path: '/cam/realmonitor?channel=1&subtype=0',
    note: 'Amcrest cameras use the Dahua stream path.',
  },
  {
    id: 'axis',
    label: 'Axis',
    path: '/axis-media/media.amp',
    note: '',
  },
  {
    id: 'onvif',
    label: 'Other (ONVIF)',
    path: '/onvif1',
    note: 'Many generic cameras answer here. If it does not work, look for “RTSP” in the camera’s own app.',
  },
  {
    id: 'manual',
    label: 'I know the path',
    path: '',
    note: '',
  },
]

export const makeById = (id) => MAKES.find(m => m.id === id) || MAKES[MAKES.length - 1]

// Paste the camera's RTSP URL, rather than taking it apart by hand.
//
// The engine has always accepted a whole URL (`CameraConfig.url` wins over the
// parts) and no form has ever offered one - the same gap as the webcam option,
// and it costs more here. A URL is how people actually HAVE this information:
// it is what the camera's own app shows, what an installer writes down and
// what gets pasted into a message. Splitting it into five fields by eye is
// where a password containing `@` or `/` goes wrong, and this repository
// already records a whole class of bug from unencoded `@` in RTSP credentials.
//
// Split into fields rather than stored whole, deliberately: everything else on
// the form - Test, the make picker, editing later, and the rule that a
// password is never returned to the browser - works on the parts. A URL kept
// intact would carry the password back out to every screen that reads a
// camera.
export function parseRtspUrl(raw) {
  const text = String(raw || '').trim()
  if (!text) return null
  const hasScheme = /^[a-z][a-z0-9+.-]*:\/\//i.test(text)
  // A bare `host/path` is a reasonable thing to paste, so the scheme is
  // optional - but something has to mark this as a URL rather than a word.
  // Without the slash test, `nonsense` parses as a perfectly good hostname
  // and silently fills the Address field with it: a wrong answer that looks
  // like it worked, which is worse than refusing.
  if (!hasScheme && !text.includes('/')) return null
  const withScheme = hasScheme ? text : 'rtsp://' + text
  let u
  try {
    u = new URL(withScheme)
  } catch {
    return null
  }
  if (!u.hostname) return null
  // WHATWG splits user info at the LAST `@`, which is what makes an unencoded
  // `@` inside a password parse the way a person means it.
  const out = {
    host: u.hostname,
    port: Number(u.port) || 554,
    path: (u.pathname || '') + (u.search || '') || '/',
    username: decodeURIComponent(u.username || ''),
    password: decodeURIComponent(u.password || ''),
  }
  return out
}