import * as types from "constants/action_types";
import lbry from "lbry";
import lbryio from "lbryio";
import lbryuri from "lbryuri";
import { selectBalance } from "selectors/wallet";
import {
  selectFileInfoForUri,
  selectUrisDownloading,
} from "selectors/file_info";
import { selectResolvingUris } from "selectors/content";
import { selectCostInfoForUri } from "selectors/cost_info";
import { doOpenModal } from "actions/app";
import { doClaimEligiblePurchaseRewards } from "actions/rewards";
import batchActions from "util/batchActions";

export function doResolveUri(uri) {
  return function(dispatch, getState) {
    uri = lbryuri.normalize(uri);

    const state = getState();
    const alreadyResolving = selectResolvingUris(state).indexOf(uri) !== -1;

    if (!alreadyResolving) {
      dispatch({
        type: types.RESOLVE_URI_STARTED,
        data: { uri },
      });

      lbry.resolve({ uri }).then(resolutionInfo => {
        const { claim, certificate } = resolutionInfo
          ? resolutionInfo
          : { claim: null, certificate: null };

        dispatch({
          type: types.RESOLVE_URI_COMPLETED,
          data: {
            uri,
            claim,
            certificate,
          },
        });
      });
    }
  };
}

export function doFetchFeaturedUris() {
  return function(dispatch, getState) {
    const state = getState();

    dispatch({
      type: types.FETCH_FEATURED_CONTENT_STARTED,
    });

    const success = ({ Categories, Uris }) => {
      let featuredUris = {};
      const actions = [];

      Categories.forEach(category => {
        if (Uris[category] && Uris[category].length) {
          const uris = Uris[category];

          featuredUris[category] = uris;
          uris.forEach(uri => {
            actions.push(doResolveUri(uri));
          });
        }
      });

      actions.push({
        type: types.FETCH_FEATURED_CONTENT_COMPLETED,
        data: {
          categories: Categories,
          uris: featuredUris,
          success: true,
        },
      });

      dispatch(batchActions(...actions));
    };

    const failure = () => {
      dispatch({
        type: types.FETCH_FEATURED_CONTENT_COMPLETED,
        data: {
          categories: [],
          uris: {},
        },
      });
    };

    lbryio
      .call("discover", "list", { version: "early-access" })
      .then(success, failure);
  };
}

export function doUpdateLoadStatus(uri, outpoint) {
  return function(dispatch, getState) {
    const state = getState();

    lbry
      .file_list({
        outpoint: outpoint,
        full_status: true,
      })
      .then(([fileInfo]) => {
        if (!fileInfo || fileInfo.written_bytes == 0) {
          // download hasn't started yet
          setTimeout(() => {
            dispatch(doUpdateLoadStatus(uri, outpoint));
          }, 250);
        } else if (fileInfo.completed) {
          // TODO this isn't going to get called if they reload the client before
          // the download finished
          dispatch({
            type: types.DOWNLOADING_COMPLETED,
            data: {
              uri,
              outpoint,
              fileInfo,
            },
          });
        } else {
          // ready to play
          const { total_bytes, written_bytes } = fileInfo;
          const progress = written_bytes / total_bytes * 100;

          dispatch({
            type: types.DOWNLOADING_PROGRESSED,
            data: {
              uri,
              outpoint,
              fileInfo,
              progress,
            },
          });
          setTimeout(() => {
            dispatch(doUpdateLoadStatus(uri, outpoint));
          }, 250);
        }
      });
  };
}

export function doDownloadFile(uri, streamInfo) {
  return function(dispatch, getState) {
    const state = getState();

    lbry
      .file_list({ outpoint: streamInfo.outpoint, full_status: true })
      .then(([fileInfo]) => {
        dispatch({
          type: types.DOWNLOADING_STARTED,
          data: {
            uri,
            outpoint: streamInfo.outpoint,
            fileInfo,
          },
        });

        dispatch(doUpdateLoadStatus(uri, streamInfo.outpoint));
      });

    lbryio
      .call("file", "view", {
        uri: uri,
        outpoint: streamInfo.outpoint,
        claim_id: streamInfo.claim_id,
      })
      .catch(() => {});

    dispatch(doClaimEligiblePurchaseRewards());
  };
}

export function doLoadVideo(uri) {
  return function(dispatch, getState) {
    const state = getState();

    dispatch({
      type: types.LOADING_VIDEO_STARTED,
      data: {
        uri,
      },
    });

    lbry.get({ uri }).then(streamInfo => {
      const timeout =
        streamInfo === null ||
        typeof streamInfo !== "object" ||
        streamInfo.error == "Timeout";

      if (timeout) {
        dispatch({
          type: types.LOADING_VIDEO_FAILED,
          data: { uri },
        });
        dispatch(doOpenModal("timedOut"));
      } else {
        dispatch(doDownloadFile(uri, streamInfo));
      }
    });
  };
}

export function doPurchaseUri(uri, purchaseModalName) {
  return function(dispatch, getState) {
    const state = getState();
    const balance = selectBalance(state);
    const fileInfo = selectFileInfoForUri(state, { uri });
    const downloadingByUri = selectUrisDownloading(state);
    const alreadyDownloading = !!downloadingByUri[uri];

    // we already fully downloaded the file.
    if (fileInfo && fileInfo.completed) {
      // If written_bytes is false that means the user has deleted/moved the
      // file manually on their file system, so we need to dispatch a
      // doLoadVideo action to reconstruct the file from the blobs
      if (!fileInfo.written_bytes) dispatch(doLoadVideo(uri));

      return Promise.resolve();
    }

    // we are already downloading the file
    if (alreadyDownloading) {
      return Promise.resolve();
    }

    const costInfo = selectCostInfoForUri(state, { uri });
    const { cost } = costInfo;

    // the file is free or we have partially downloaded it
    if (cost <= 0.01 || (fileInfo && fileInfo.download_directory)) {
      dispatch(doLoadVideo(uri));
      return Promise.resolve();
    }

    if (cost > balance) {
      dispatch(doOpenModal("notEnoughCredits"));
    } else {
      dispatch(doOpenModal(purchaseModalName));
    }

    return Promise.resolve();
  };
}

export function doFetchClaimsByChannel(uri, page = 1) {
  return function(dispatch, getState) {
    dispatch({
      type: types.FETCH_CHANNEL_CLAIMS_STARTED,
      data: { uri },
    });

    lbry.claim_list_by_channel({ uri, page }).then(result => {
      const claimResult = result[uri],
        claims = claimResult ? claimResult.claims_in_channel : [];

      dispatch({
        type: types.FETCH_CHANNEL_CLAIMS_COMPLETED,
        data: {
          uri,
          claims: claims,
        },
      });
    });
  };
}

export function doFetchClaimListMine() {
  return function(dispatch, getState) {
    dispatch({
      type: types.FETCH_CLAIM_LIST_MINE_STARTED,
    });

    lbry.claim_list_mine().then(claims => {
      dispatch({
        type: types.FETCH_CLAIM_LIST_MINE_COMPLETED,
        data: {
          claims,
        },
      });
    });
  };
}

export function doFetchChannelListMine() {
  return function(dispatch, getState) {
    dispatch({
      type: types.FETCH_CHANNEL_LIST_MINE_STARTED,
    });

    const callback = channels => {
      dispatch({
        type: types.FETCH_CHANNEL_LIST_MINE_COMPLETED,
        data: { claims: channels },
      });
    };

    lbry.channel_list_mine().then(callback);
  };
}