#language imports
Language = require './languages'
# schema helper methods

me = module.exports

combine = (base, ext) ->
  return base unless ext?
  return _.extend(base, ext)

urlPattern = '^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&%\$#_=]*)?$'

# Common schema properties
me.object = (ext, props) -> combine({type: 'object', additionalProperties: false, properties: props or {}}, ext)
me.array = (ext, items) -> combine({type: 'array', items: items or {}}, ext)
me.shortString = (ext) -> combine({type: 'string', maxLength: 100}, ext)
me.pct = (ext) -> combine({type: 'number', maximum: 1.0, minimum: 0.0}, ext)
me.date = (ext) -> combine({type: ['object', 'string'], format: 'date-time'}, ext)
# should just be string (Mongo ID), but sometimes mongoose turns them into objects representing those, so we are lenient
me.objectId = (ext) -> schema = combine({type: ['object', 'string']}, ext)
me.url = (ext) -> combine({type: 'string', format: 'url', pattern: urlPattern}, ext)
me.int = (ext) -> combine {type: 'integer'}, ext
me.float = (ext) -> combine {type: 'number'}, ext

PointSchema = me.object {title: 'Point', description: 'An {x, y} coordinate point.', format: 'point2d', required: ['x', 'y']},
  x: {title: 'x', description: 'The x coordinate.', type: 'number', 'default': 15}
  y: {title: 'y', description: 'The y coordinate.', type: 'number', 'default': 20}

me.point2d = (ext) -> combine(_.cloneDeep(PointSchema), ext)

SoundSchema = me.object {format: 'sound'},
  mp3: {type: 'string', format: 'sound-file'}
  ogg: {type: 'string', format: 'sound-file'}

me.sound = (props) ->
  obj = _.cloneDeep(SoundSchema)
  obj.properties[prop] = props[prop] for prop of props
  obj

ColorConfigSchema = me.object {format: 'color-sound'},
  hue: {format: 'range', type: 'number', minimum: 0, maximum: 1}
  saturation: {format: 'range', type: 'number', minimum: 0, maximum: 1}
  lightness: {format: 'range', type: 'number', minimum: 0, maximum: 1}

me.colorConfig = (props) ->
  obj = _.cloneDeep(ColorConfigSchema)
  obj.properties[prop] = props[prop] for prop of props
  obj

# BASICS

basicProps = (linkFragment) ->
  _id: me.objectId(links: [{rel: 'self', href: "/db/#{linkFragment}/{($)}"}], format: 'hidden')
  __v: {title: 'Mongoose Version', format: 'hidden'}

me.extendBasicProperties = (schema, linkFragment) ->
  schema.properties = {} unless schema.properties?
  _.extend(schema.properties, basicProps(linkFragment))

# PATCHABLE

patchableProps = ->
  patches: me.array({title:'Patches'}, {
    _id: me.objectId(links: [{rel: 'db', href: '/db/patch/{($)}'}], title: 'Patch ID', description: 'A reference to the patch.')
    status: {enum: ['pending', 'accepted', 'rejected', 'cancelled']}
  })
  allowPatches: {type: 'boolean'}
  watchers: me.array({title: 'Watchers'},
    me.objectId(links: [{rel: 'extra', href: '/db/user/{($)}'}]))

me.extendPatchableProperties = (schema) ->
  schema.properties = {} unless schema.properties?
  _.extend(schema.properties, patchableProps())

# NAMED

namedProps = ->
  name: me.shortString({title: 'Name'})
  slug: me.shortString({title: 'Slug', format: 'hidden'})

me.extendNamedProperties = (schema) ->
  schema.properties = {} unless schema.properties?
  _.extend(schema.properties, namedProps())

# VERSIONED

versionedProps = (linkFragment) ->
  version:
    'default': {minor: 0, major: 0, isLatestMajor: true, isLatestMinor: true}
    format: 'version'
    title: 'Version'
    type: 'object'
    readOnly: true
    additionalProperties: false
    properties:
      major: {type: 'number', minimum: 0}
      minor: {type: 'number', minimum: 0}
      isLatestMajor: {type: 'boolean'}
      isLatestMinor: {type: 'boolean'}
  # TODO: figure out useful 'rel' values here
  original: me.objectId(links: [{rel: 'extra', href: "/db/#{linkFragment}/{($)}"}], format: 'hidden')
  parent: me.objectId(links: [{rel: 'extra', href: "/db/#{linkFragment}/{($)}"}], format: 'hidden')
  creator: me.objectId(links: [{rel: 'extra', href: '/db/user/{($)}'}], format: 'hidden')
  created: me.date({title: 'Created', readOnly: true})
  commitMessage: {type: 'string', maxLength: 500, title: 'Commit Message', readOnly: true}

me.extendVersionedProperties = (schema, linkFragment) ->
  schema.properties = {} unless schema.properties?
  _.extend(schema.properties, versionedProps(linkFragment))

# SEARCHABLE

searchableProps = ->
  index: {format: 'hidden'}

me.extendSearchableProperties = (schema) ->
  schema.properties = {} unless schema.properties?
  _.extend(schema.properties, searchableProps())

# PERMISSIONED

permissionsProps = ->
  permissions:
    type: 'array'
    items:
      type: 'object'
      additionalProperties: false
      properties:
        target: {}
        access: {type: 'string', 'enum': ['read', 'write', 'owner']}
    format: 'hidden'

me.extendPermissionsProperties = (schema) ->
  schema.properties = {} unless schema.properties?
  _.extend(schema.properties, permissionsProps())

# TRANSLATABLE

me.generateLanguageCodeArrayRegex = -> '^(' + Language.languageCodes.join('|') + ')$'

me.getLanguageCodeArray = ->
  return Language.languageCodes

me.getLanguagesObject = -> return Language

# OTHER

me.classNamePattern = '^[A-Z][A-Za-z0-9]*$'  # starts with capital letter; just letters and numbers
me.identifierPattern = '^[a-z][A-Za-z0-9]*$'  # starts with lowercase letter; just letters and numbers
me.constantPattern = '^[A-Z0-9_]+$'  # just uppercase letters, underscores, and numbers
me.identifierOrConstantPattern = '^([a-z][A-Za-z0-9]*|[A-Z0-9_]+)$'

me.FunctionArgumentSchema = me.object {
  title: 'Function Argument',
  description: 'Documentation entry for a function argument.'
  'default':
    name: 'target'
    type: 'object'
    example: 'this.getNearestEnemy()'
    description: 'The target of this function.'
  required: ['name', 'type', 'example', 'description']
},
  name: {type: 'string', pattern: me.identifierPattern, title: 'Name', description: 'Name of the function argument.'}
  # not actual JS types, just whatever they describe...
  type: me.shortString(title: 'Type', description: 'Intended type of the argument.')
  example:
    oneOf: [
      {
        type: 'object',
        title: 'Language Examples',
        description: 'Examples by code language.',
        additionalProperties: me.shortString(description: 'Example value for the argument.')
        format: 'code-languages-object'
        default: {javascript: ''}
      }
      me.shortString(title: 'Example', description: 'Example value for the argument.')
    ]
  description:
    oneOf: [
      {
        type: 'object',
        title: 'Language Descriptions',
        description: 'Example argument descriptions by code language.',
        additionalProperties: {type: 'string', description: 'Description of the argument.', maxLength: 1000}
        format: 'code-languages-object'
        default: {javascript: ''}
      }
      {title: 'Description', type: 'string', description: 'Description of the argument.', maxLength: 1000}
    ]
  'default':
    title: 'Default'
    description: 'Default value of the argument. (Your code should set this.)'
    'default': null

me.codeSnippet = me.object {description: 'A language-specific code snippet'},
  code: {type: 'string', title: 'Snippet', default: '', description: 'Code snippet. Use ${1:defaultValue} syntax to add flexible arguments'}
  tab: {type: 'string', title: 'Tab Trigger', description: 'Tab completion text. Will be expanded to the snippet if typed and hit tab.'}

me.activity = me.object {description: 'Stats on an activity'},
  first: me.date()
  last: me.date()
  count: {type: 'integer', minimum: 0}