const isFreePublicClaim = require('./isFreePublicClaim.js')
const lbryApi = require('../libraries/lbryApi.js')

function filterForFreePublicClaims (claimsListArray) {
  // console.log("claims list:", claimsListArray)
  if (!claimsListArray) {
    return null
  }
  const freePublicClaims = claimsListArray.filter(claim => {
    if (!claim.value) {
      return false
    }
    return isFreePublicClaim(claim)
  })
  return freePublicClaims
}

function orderTopClaims (claimsListArray) {
  console.log('>> orderTopClaims')
  claimsListArray.sort(({ amountA, heightA }, { amountB, heightB }) => {
    if (amountA === amountB) {
      return heightA > heightB
    } else {
      return amountA < amountB
    }
  })
  return claimsListArray
}

module.exports = claimName => {
  const deferred = new Promise((resolve, reject) => {
    // make a call to the daemon to get the claims list
    lbryApi
      .getClaimsList(claimName)
      .then(({ claims }) => {
        const claimsList = claims
        console.log('>> Number of claims:', claimsList.length)
        // return early if no claims were found
        if (claimsList.length === 0) {
          reject('NO_CLAIMS')
          console.log('exiting due to lack of claims')
          return
        }
        // filter the claims to return only free, public claims
        const freePublicClaims = filterForFreePublicClaims(claimsList)
        // return early if no free, public claims were found
        if (!freePublicClaims || freePublicClaims.length === 0) {
          reject('NO_FREE_PUBLIC_CLAIMS')
          console.log('exiting due to lack of free or public claims')
          return
        }
        // order the claims
        const orderedPublicClaims = orderTopClaims(freePublicClaims)
        // resolve the promise
        resolve(orderedPublicClaims)
      })
      .catch(error => {
        console.log(">> 'claim_list' error")
        reject(error)
      })
  })
  return deferred
}