var convertFromSchema = require('./schema')
var InvalidInputError = require('../errors/invalid-input-error')

module.exports = convertFromParameter

// Convert from OpenAPI 3.0 `ParameterObject` to JSON schema v4
function convertFromParameter (parameter, options) {
  if (parameter.schema !== undefined) {
    return convertParameterSchema(parameter, parameter.schema, options)
  } else if (parameter.content !== undefined) {
    return convertFromContents(parameter, options)
  } else {
    if (options.strictMode) {
      throw new InvalidInputError('OpenAPI parameter must have either a \'schema\' or a \'content\' property')
    }
    return convertParameterSchema(parameter, {}, options)
  }
}

function convertFromContents (parameter, options) {
  var schemas = {}

  for (var mime in parameter.content) {
    schemas[mime] = convertParameterSchema(parameter, parameter.content[mime].schema, options)
  }

  return schemas
}

function convertParameterSchema (parameter, schema, options) {
  var jsonSchema = convertFromSchema(schema || {}, options)

  if (parameter.description) {
    jsonSchema.description = parameter.description
  }

  return jsonSchema
}