import json, options, times, timeutils, uuids

type
  User* = object
    id*: UUID
    displayName*: string
    email*: string
    hashedPwd*: string

  ApiToken* = object
    id*: UUID
    userId*: UUID
    name*:string
    expires*: Option[DateTime]
    hashedToken*: string

  Measure* = object
    id*: UUID
    userId*: UUID
    slug*: string
    name*: string
    description*: string
    domainSource*: Option[string]
    domainUnits*: string
    rangeSource*: Option[string]
    rangeUnits*: string
    analysis*: seq[string]

  Value* = object
    id*: UUID
    measureId*: UUID
    value*: int
    timestamp*: DateTime
    extData*: string

proc `$`*(u: User): string =
  return "User " & ($u.id)[0..6] & " - " & u.displayName & " <" & u.email & ">"

proc `$`*(tok: ApiToken): string =
  result =  "ApiToken " & ($tok.id)[0..6] & " - " & tok.name
  if tok.expires.isSome: result &= " (expires " & tok.expires.get.formatIso8601 & ")"
  else: result &= " (no expiry)"

proc `$`*(m: Measure): string =
  return "Measure " & ($m.id)[0..6] & " - " & m.slug

proc `$`*(v: Value): string =
  return "Value " & ($v.id)[0..6] & " - " & ($v.measureId)[0..6] & " = " & $v.value

proc `%`*(u: User): JsonNode =
  result = %*{
    "id": $u.id,
    "email": u.email,
    "displayName": u.displayName
  }

proc `%`*(tok: ApiToken): JsonNode =
  result = %*{
    "id": $tok.id,
    "userId": $tok.userId,
    "name": tok.name
  }

  if tok.expires.isSome:
    result["expires"] = %(tok.expires.get.formatIso8601)

proc `%`*(m: Measure): JsonNode =
  result = %*{
    "id": $m.id,
    "userId": $m.userId,
    "slug": m.slug,
    "name": m.name,
    "description": m.description,
    "domainUnits": m.domainUnits,
    "rangeUnits": m.rangeUnits,
    "analysis": m.analysis
  }

  if m.domainSource.isSome: result["domainSource"] = %(m.domainSource.get)
  if m.rangeSource.isSome: result["rangeSource"] = %(m.rangeSource.get)

proc `%`*(v: Value): JsonNode =
  result = %*{
    "id": $v.id,
    "measureId": $v.measureId,
    "value": v.value,
    "timestampe": v.timestamp.formatIso8601,
    "extData": v.extData
  }