// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

import { sha3, api } from '../parity.js';

const alreadyQueued = (queue, action, name) =>
  !!queue.find((entry) => entry.action === action && entry.name === name);

export const reserveStart = (name) => ({ type: 'names reserve start', name });

export const reserveSuccess = (name) => ({ type: 'names reserve success', name });

export const reserveFail = (name) => ({ type: 'names reserve fail', name });

export const reserve = (name) => (dispatch, getState) => {
  const state = getState();
  const account = state.accounts.selected;
  const contract = state.contract;
  const fee = state.fee;

  if (!contract || !account) {
    return;
  }

  if (alreadyQueued(state.names.queue, 'reserve', name)) {
    return;
  }

  const reserve = contract.functions.find((f) => f.name === 'reserve');

  name = name.toLowerCase();
  const options = {
    from: account.address,
    value: fee
  };
  const values = [ sha3(name) ];

  dispatch(reserveStart(name));

  reserve.estimateGas(options, values)
    .then((gas) => {
      options.gas = gas.mul(1.2).toFixed(0);
      return reserve.postTransaction(options, values);
    })
    .then((requestId) => {
      return api.pollMethod('parity_checkRequest', requestId);
    })
    .then((txhash) => {
      dispatch(reserveSuccess(name));
    })
    .catch((err) => {
      if (err && err.type === 'REQUEST_REJECTED') {
        return dispatch(reserveFail(name));
      }

      console.error(`could not reserve ${name}`);

      if (err) {
        console.error(err.stack);
      }

      dispatch(reserveFail(name));
    });
};

export const dropStart = (name) => ({ type: 'names drop start', name });

export const dropSuccess = (name) => ({ type: 'names drop success', name });

export const dropFail = (name) => ({ type: 'names drop fail', name });

export const drop = (name) => (dispatch, getState) => {
  const state = getState();
  const account = state.accounts.selected;
  const contract = state.contract;

  if (!contract || !account) {
    return;
  }

  if (alreadyQueued(state.names.queue, 'drop', name)) {
    return;
  }

  const drop = contract.functions.find((f) => f.name === 'drop');

  name = name.toLowerCase();
  const options = { from: account.address };
  const values = [ sha3(name) ];

  dispatch(dropStart(name));
  drop.estimateGas(options, values)
    .then((gas) => {
      options.gas = gas.mul(1.2).toFixed(0);
      return drop.postTransaction(options, values);
    })
    .then((requestId) => {
      return api.pollMethod('parity_checkRequest', requestId);
    })
    .then((txhash) => {
      dispatch(dropSuccess(name));
    })
    .catch((err) => {
      if (err && err.type === 'REQUEST_REJECTED') {
        dispatch(reserveFail(name));
      }

      console.error(`could not drop ${name}`);

      if (err) {
        console.error(err.stack);
      }

      dispatch(reserveFail(name));
    });
};