export default {
  methods: {
    // Returns the atomic, unfilled, reserved contributions for the given wallet
    getUnfilledReservedContribution(node, addr) {
      for (const contributor of node.contributors)
        if (contributor.address === addr && contributor.amount === 0 && contributor.reserved > 0)
          return contributor.reserved;
      return 0;
    },
    getMinContribution(node, myaddr) {
      if (node.funded)
        return 0;

      const MAX_NUMBER_OF_CONTRIBUTORS = 4;
      // If we have a reserved spot then that is our minimum:
      let minContributionAtomicUnits = this.getUnfilledReservedContribution(node, myaddr);
      // Otherwise we can contribute our fair share of whatever amount is left (i.e. REMAINING/N
      // when there are N available spots).
      if (minContributionAtomicUnits === 0 && node.contributors.length < MAX_NUMBER_OF_CONTRIBUTORS) {
        const openContributionRemaining = this.openForContribution(node);

        minContributionAtomicUnits = openContributionRemaining /
          (MAX_NUMBER_OF_CONTRIBUTORS - node.contributors.length);
      }

      const minContributionOxen = minContributionAtomicUnits / 1e9;
      // ceiling to 4 decimal places
      return minContributionOxen.toFixed(4);
    },
    openForContribution(node, addr = null) {
      let openContributionRemaining =
        node.staking_requirement > node.total_reserved
          ? node.staking_requirement - node.total_reserved
          : 0;
      if (addr)
        openContributionRemaining += this.getUnfilledReservedContribution(node, addr);
      return openContributionRemaining;
    },
    openForContributionOxen(node, addr = null) {
      return (this.openForContribution(node, addr) / 1e9).toFixed(4);
    }
  }
};