// the tests in tests/graphql.js use this schema to ensure the integrity
// of the data in lib/graphql/static/*.json

// PREVIEWS
const previewsValidator = {
  properties: {
    title: {
      type: 'string',
      required: true
    },
    description: {
      type: 'string',
      required: true
    },
    toggled_by: {
      type: 'string',
      required: true
    },
    toggled_on: {
      type: 'array',
      required: true
    },
    owning_teams: {
      type: 'array',
      required: true
    },
    accept_header: {
      type: 'string',
      required: true
    },
    href: {
      type: 'string',
      required: true
    }
  }
}

// UPCOMING CHANGES
const upcomingChangesValidator = {
  properties: {
    location: {
      type: 'string',
      required: true
    },
    description: {
      type: 'string',
      required: true
    },
    reason: {
      type: 'string',
      required: true
    },
    date: {
      type: 'string',
      required: true,
      pattern: /^\d{4}-\d{2}-\d{2}$/
    },
    criticality: {
      type: 'string',
      required: true,
      pattern: '(breaking|dangerous)'
    },
    owner: {
      type: 'string',
      required: true,
      pattern: /^[\S]*$/
    }
  }
}

// SCHEMAS
// many GraphQL schema members have these core properties
const coreProps = {
  properties: {
    name: {
      type: 'string',
      required: true
    },
    type: {
      type: 'string',
      required: true
    },
    kind: {
      type: 'string',
      required: true
    },
    id: {
      type: 'string',
      required: true
    },
    href: {
      type: 'string',
      required: true
    },
    description: {
      type: 'string',
      required: true
    },
    isDeprecated: {
      type: 'boolean',
      required: false
    },
    preview: {
      type: 'object',
      required: false,
      properties: previewsValidator.properties
    }
  }
}

// some GraphQL schema members have the core properties plus an 'args' object
const corePropsPlusArgs = dup(coreProps)

corePropsPlusArgs.properties.args = {
  type: 'array',
  required: false,
  properties: coreProps.properties
}

// the args object can have defaultValue prop
corePropsPlusArgs.properties.args.properties.defaultValue = {
  type: 'boolean',
  required: false
}

const corePropsNoType = dup(coreProps)
delete corePropsNoType.properties.type

const corePropsNoDescription = dup(coreProps)
delete corePropsNoDescription.properties.description

// QUERY CONNECTIONS AND FIELDS
const queryConnections = corePropsPlusArgs
const queryFields = corePropsPlusArgs

// MUTATIONS
const mutations = dup(corePropsNoType)

mutations.properties.inputFields = {
  type: 'array',
  required: true,
  properties: corePropsNoDescription.properties
}

mutations.properties.returnFields = {
  type: 'array',
  required: true,
  properties: coreProps.properties
}

// OBJECTS
const objects = dup(corePropsNoType)

objects.properties.fields = {
  type: 'array',
  required: true,
  properties: corePropsPlusArgs.properties
}

objects.properties.implements = {
  type: 'array',
  required: false,
  properties: {
    name: {
      type: 'string',
      required: true
    },
    id: {
      type: 'string',
      required: true
    },
    href: {
      type: 'string',
      required: true
    }
  }
}

// INTERFACES
const interfaces = dup(corePropsNoType)

interfaces.properties.fields = {
  type: 'array',
  required: true,
  properties: corePropsPlusArgs.properties
}

// ENUMS
const enums = dup(corePropsNoType)

enums.properties.values = {
  type: 'array',
  required: true,
  properties: {
    name: {
      type: 'string',
      required: true
    },
    description: {
      type: 'string',
      required: true
    }
  }
}

// UNIONS
const unions = dup(corePropsNoType)

unions.properties.possibleTypes = {
  type: 'array',
  required: true,
  properties: {
    name: {
      type: 'string',
      required: true
    },
    id: {
      type: 'string',
      required: true
    },
    href: {
      type: 'string',
      required: true
    }
  }
}

// INPUT OBJECTS
const inputObjects = dup(corePropsNoType)

inputObjects.properties.inputFields = {
  type: 'array',
  required: true,
  properties: coreProps.properties
}

// SCALARS
const scalars = dup(corePropsNoType)
scalars.properties.kind.required = false

function dup (obj) {
  return JSON.parse(JSON.stringify(obj))
}

module.exports = {
  schemaValidator: {
    queryConnections,
    queryFields,
    mutations,
    objects,
    interfaces,
    enums,
    unions,
    inputObjects,
    scalars
  },
  previewsValidator,
  upcomingChangesValidator
}