// @flow

export type Common = {
  id: string,
  version: string,
  created_at: string,
  timestamp?: string,
  userId?: string,
  deviceId?: string,
  type: string,
  links?: Array<string>,
  schemaVersion?: number,
};

export type Field = {|
  id: string,
  key: string | Array<string>,
  type: "text" | "localized" | "number" | "select_one" | "select_multiple" | "date" | "datetime",
  label?: string,
  readonly?: boolean,
  appearance?: "singleline" | "multiline",
  snake_case?: boolean,
  options?: Array<(string | boolean | number | null | {
    label?: string,
    value: string | boolean | number | null,
  })>,
  universal?: boolean,
  placeholder?: string,
  helperText?: string,
  min_value?: number,
  max_value?: number,
|};

export type Filter = {
  id: string,
  version: string,
  created_at: string,
  timestamp?: string,
  userId?: string,
  deviceId?: string,
  type: "filter",
  links?: Array<string>,
  schemaVersion: 1,
  filter: any,
  name: string,
};

export type Position = {
  timestamp?: number,
  mocked?: boolean,
  coords?: {
    altitude?: number,
    heading?: number,
    longitude?: number,
    speed?: number,
    latitude?: number,
    accuracy?: number,
  },
};

export type Observation = {
  id: string,
  version: string,
  created_at: string,
  timestamp?: string,
  userId?: string,
  deviceId?: string,
  type: "observation",
  links?: Array<string>,
  schemaVersion: 4,
  lat?: number | null,
  lon?: number | null,
  metadata?: {
    position?: Position,
    lastSavedPosition?: Position,
    positionProvider?: {
      gpsAvailable?: boolean,
      passiveAvailable?: boolean,
      locationServicesEnabled?: boolean,
      networkAvailable?: boolean,
    },
    manualLocation?: boolean,
    [key: any]: any,
  },
  refs?: Array<{
    id: string
  }>,
  attachments?: Array<{
    id: string,
    type?: string,
  }>,
  tags?: {
    [key: any]: any
  },
};

export type Preset = {|
  schemaVersion?: 1,
  id: string,
  name: string,
  geometry: Array<("point" | "vertex" | "line" | "area" | "relation")>,
  tags: {
    [key: any]: any
  },
  addTags?: {
    [key: any]: any
  },
  removeTags?: {
    [key: any]: any
  },
  fields?: Array<string>,
  additionalFields?: Array<string>,
  icon?: string,
  terms?: Array<string>,
  sort?: number,
|};
/**
 * @flow
 * The flow types generated from the JSON Schema are not very strict. These
 * manual types are more strict for fields, and are more useful in code
 */

export type Key = string | Array<string>

type BaseField = {|
  // A unique id used to reference the field from presets
  id: string,
  // They key in a tags object that this field applies to. For nested
  // properties, key can be an array e.g. for tags = { foo: { bar: 1 } } the key
  // is ['foo', 'bar']
  key: Key,
  label?: string,
  // Displayed as a placeholder or hint for the field: use for additional
  // context or example responses for the user
  placeholder?: string,
  // Additional context about the field, e.g. hints about how to answer the
  // question.
  helperText?: string,
  // If a field definition contains the property "universal": true, this field
  // will appear in the "Add Field" list for all presets
  universal?: boolean,
  // Displayed, but cannot be edited
  readonly?: boolean
|}

// type FieldType =
//   | 'text'
//   | 'number'
//   | 'select_one'
//   | 'select_multiple'
//   | 'date'
//   | 'datetime'

export type TextField = {
  ...BaseField,
  type: 'text' | 'textarea' | 'localized',
  appearance?: 'singleline' | 'multiline',
  // Spaces are replaced with underscores
  snake_case?: boolean
}

export type LinkField = {
  ...BaseField,
  type: 'link'
}

export type NumberField = {
  ...BaseField,
  type: 'number',
  min_value?: number,
  max_value?: number
}

export type SelectableFieldValue = number | string | boolean | null

export type LabeledSelectOption = {|
  value: SelectableFieldValue,
  label: string
|}

export type SelectOptions = Array<SelectableFieldValue | LabeledSelectOption>

export type SelectOneField = {
  ...BaseField,
  type: 'select_one',
  options: SelectOptions,
  // User can enter their own reponse if not on the list (defaults to true on
  // desktop, false on mobile)
  other?: boolean,
  // Spaces are replaced with underscores
  snake_case?: boolean
}

export type SelectMultipleField = {
  ...$Exact<SelectOneField>,
  type: 'select_multiple'
}

export type DateField = {
  ...BaseField,
  type: 'date',
  min_value?: string,
  max_value?: string
}

export type DateTimeField = {
  ...BaseField,
  type: 'datetime',
  min_value?: string,
  max_value?: string
}