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namespace org.acme.vehicle.auction
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asset Vehicle identified by vin {
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  o String vin
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  --> Member owner
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}
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enum ListingState {
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  o FOR_SALE
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  o RESERVE_NOT_MET
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  o SOLD
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}
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asset VehicleListing identified by listingId {
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  o String listingId
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  o Double reservePrice
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  o String description
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  o ListingState state
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  o Offer[] offers optional
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  --> Vehicle vehicle
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}
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abstract participant User identified by email {
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  o String email
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  o String firstName
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  o String lastName
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}
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participant Member extends User {
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  o Double balance
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}
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participant Auctioneer extends User {
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}
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transaction Offer {
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  o Double bidPrice
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  --> VehicleListing listing
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  --> Member member
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}
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transaction CloseBidding {
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  --> VehicleListing listing
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}

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async function closeBidding(closeBidding) {
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  // eslint-disable-line no-unused-vars
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  const listing = closeBidding.listing
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  if (listing.state !== 'FOR_SALE') {
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    throw new Error('Listing is not FOR SALE')
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  }
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  // by default we mark the listing as RESERVE_NOT_MET
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  listing.state = 'RESERVE_NOT_MET'
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  let highestOffer = null
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  let buyer = null
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  let seller = null
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  if (listing.offers && listing.offers.length > 0) {
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    // sort the bids by bidPrice
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    listing.offers.sort(function (a, b) {
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      return b.bidPrice - a.bidPrice
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    })
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    highestOffer = listing.offers[0]
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    if (highestOffer.bidPrice >= listing.reservePrice) {
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      // mark the listing as SOLD
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      listing.state = 'SOLD'
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      buyer = highestOffer.member
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      seller = listing.vehicle.owner
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      // update the balance of the seller
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      console.log('### seller balance before: ' + seller.balance)
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      seller.balance += highestOffer.bidPrice
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      console.log('### seller balance after: ' + seller.balance)
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      // update the balance of the buyer
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      console.log('### buyer balance before: ' + buyer.balance)
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      buyer.balance -= highestOffer.bidPrice
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      console.log('### buyer balance after: ' + buyer.balance)
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      // transfer the vehicle to the buyer
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      listing.vehicle.owner = buyer
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      // clear the offers
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      listing.offers = null
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    }
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  }
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  if (highestOffer) {
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    // save the vehicle
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    const vehicleRegistry = await getAssetRegistry(
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      'org.acme.vehicle.auction.Vehicle'
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    )
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    await vehicleRegistry.update(listing.vehicle)
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  }
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  // save the vehicle listing
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  const vehicleListingRegistry = await getAssetRegistry(
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    'org.acme.vehicle.auction.VehicleListing'
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  )
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  await vehicleListingRegistry.update(listing)
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  if (listing.state === 'SOLD') {
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    // save the buyer
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    const userRegistry = await getParticipantRegistry(
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      'org.acme.vehicle.auction.Member'
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    )
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    await userRegistry.updateAll([buyer, seller])
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  }
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}
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/**
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 * Make an Offer for a VehicleListing
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 * @param {org.acme.vehicle.auction.Offer} offer - the offer
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 * @transaction
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 */
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async function makeOffer(offer) {
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  // eslint-disable-line no-unused-vars
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  let listing = offer.listing
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  if (listing.state !== 'FOR_SALE') {
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    throw new Error('Listing is not FOR SALE')
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  }
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  if (!listing.offers) {
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    listing.offers = []
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  }
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  listing.offers.push(offer)
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  // save the vehicle listing
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  const vehicleListingRegistry = await getAssetRegistry(
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    'org.acme.vehicle.auction.VehicleListing'
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  )
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  await vehicleListingRegistry.update(listing)
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}

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rule Auctioneer {
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    description: "Allow the auctioneer full access"
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    participant: "org.acme.vehicle.auction.Auctioneer"
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    operation: ALL
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    resource: "org.acme.vehicle.auction.*"
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    action: ALLOW
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}
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rule Member {
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    description: "Allow the member read access"
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    participant: "org.acme.vehicle.auction.Member"
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    operation: READ
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    resource: "org.acme.vehicle.auction.*"
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    action: ALLOW
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}
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rule VehicleOwner {
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    description: "Allow the owner of a vehicle total access"
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    participant(m): "org.acme.vehicle.auction.Member"
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    operation: ALL
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    resource(v): "org.acme.vehicle.auction.Vehicle"
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    condition: (v.owner.getIdentifier() == m.getIdentifier())
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    action: ALLOW
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}
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rule VehicleListingOwner {
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    description: "Allow the owner of a vehicle total access to their vehicle listing"
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    participant(m): "org.acme.vehicle.auction.Member"
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    operation: ALL
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    resource(v): "org.acme.vehicle.auction.VehicleListing"
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    condition: (v.vehicle.owner.getIdentifier() == m.getIdentifier())
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    action: ALLOW
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}
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rule SystemACL {
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    description:  "System ACL to permit all access"
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    participant: "org.hyperledger.composer.system.Participant"
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    operation: ALL
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    resource: "org.hyperledger.composer.system.**"
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    action: ALLOW
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}
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rule NetworkAdminUser {
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    description: "Grant business network administrators full access to user resources"
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    participant: "org.hyperledger.composer.system.NetworkAdmin"
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    operation: ALL
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    resource: "**"
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    action: ALLOW
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}
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rule NetworkAdminSystem {
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    description: "Grant business network administrators full access to system resources"
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    participant: "org.hyperledger.composer.system.NetworkAdmin"
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    operation: ALL
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    resource: "org.hyperledger.composer.system.**"
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    action: ALLOW
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}