import * as types from 'constants/action_types'
import lbryuri from 'lbryuri'

const reducers = {}
const defaultState = {
}

reducers[types.FILE_LIST_STARTED] = function(state, action) {
  return Object.assign({}, state, {
    isFileListPending: true,
  })
}

reducers[types.FILE_LIST_COMPLETED] = function(state, action) {
  const {
    fileInfos,
  } = action.data

  const newFileInfos = Object.assign({}, state.fileInfos)
  fileInfos.forEach((fileInfo) => {
    const { outpoint } = fileInfo

    if (outpoint) newFileInfos[fileInfo.outpoint] = fileInfo
  })

  return Object.assign({}, state, {
    isFileListPending: false,
    fileInfos: newFileInfos
  })
}

reducers[types.FETCH_FILE_INFO_STARTED] = function(state, action) {
  const {
    outpoint
  } = action.data
  const newFetching = Object.assign({}, state.fetching)

  newFetching[outpoint] = true

  return Object.assign({}, state, {
    fetching: newFetching,
  })
}

reducers[types.FETCH_FILE_INFO_COMPLETED] = function(state, action) {
  const {
    fileInfo,
    outpoint,
  } = action.data

  const newFileInfos = Object.assign({}, state.fileInfos)
  const newFetching = Object.assign({}, state.fetching)

  newFileInfos[outpoint] = fileInfo
  delete newFetching[outpoint]

  return Object.assign({}, state, {
    fileInfos: newFileInfos,
    fetching: newFetching,
  })
}

reducers[types.DOWNLOADING_STARTED] = function(state, action) {
  const {
    uri,
    outpoint,
    fileInfo,
  } = action.data

  const newFileInfos = Object.assign({}, state.fileInfos)
  const newDownloading = Object.assign({}, state.urisDownloading)
  const newLoading = Object.assign({}, state.urisLoading)

  newDownloading[uri] = true
  newFileInfos[outpoint] = fileInfo
  delete newLoading[uri]

  return Object.assign({}, state, {
    urisDownloading: newDownloading,
    urisLoading: newLoading,
    fileInfos: newFileInfos,
  })
}

reducers[types.DOWNLOADING_PROGRESSED] = function(state, action) {
  const {
    uri,
    outpoint,
    fileInfo,
  } = action.data

  const newFileInfos = Object.assign({}, state.fileInfos)
  const newDownloading = Object.assign({}, state.urisDownloading)

  newFileInfos[outpoint] = fileInfo
  newDownloading[uri] = true

  return Object.assign({}, state, {
    fileInfos: newFileInfos,
    urisDownloading: newDownloading
  })
}

reducers[types.DOWNLOADING_COMPLETED] = function(state, action) {
  const {
    uri,
    outpoint,
    fileInfo,
  } = action.data

  const newFileInfos = Object.assign({}, state.fileInfos)
  const newDownloading = Object.assign({}, state.urisDownloading)

  newFileInfos[outpoint] = fileInfo
  delete newDownloading[uri]

  return Object.assign({}, state, {
    fileInfos: newFileInfos,
    urisDownloading: newDownloading,
  })
}

reducers[types.FILE_DELETE] = function(state, action) {
  const {
    outpoint,
  } = action.data

  const newFileInfos = Object.assign({}, state.fileInfos)

  delete newFileInfos[outpoint]

  return Object.assign({}, state, {
    fileInfos: newFileInfos,
  })
}

reducers[types.LOADING_VIDEO_STARTED] = function(state, action) {
  const {
    uri,
  } = action.data

  const newLoading = Object.assign({}, state.urisLoading)

  newLoading[uri] = true

  return Object.assign({}, state, {
    urisLoading: newLoading,
  })
}

reducers[types.LOADING_VIDEO_FAILED] = function(state, action) {
  const {
    uri,
  } = action.data

  const newLoading = Object.assign({}, state.urisLoading)

  delete newLoading[uri]

  return Object.assign({}, state, {
    urisLoading: newLoading,
  })
}


export default function reducer(state = defaultState, action) {
  const handler = reducers[action.type];
  if (handler) return handler(state, action);
  return state;
}