import c from 'compact-encoding'

/** Read request: block index */
export const msgRead = {
  encoding: c.uint32,
  onmessage: null
}

/** Read response: index + data */
export const msgDataEncoding = {
  preencode(state, m) {
    c.uint32.preencode(state, m.index)
    c.buffer.preencode(state, m.data)
  },
  encode(state, m) {
    c.uint32.encode(state, m.index)
    c.buffer.encode(state, m.data)
  },
  decode(state) {
    return { index: c.uint32.decode(state), data: c.buffer.decode(state) }
  }
}

export const msgSearchReqEncoding = {
  preencode(state, m) {
    c.uint32.preencode(state, m.id)
    c.string.preencode(state, m.query)
  },
  encode(state, m) {
    c.uint32.encode(state, m.id)
    c.string.encode(state, m.query)
  },
  decode(state) {
    return { id: c.uint32.decode(state), query: c.string.decode(state) }
  }
}

export const msgSearchResEncoding = {
  preencode(state, m) {
    c.uint32.preencode(state, m.id)
    c.array(c.string).preencode(state, m.matches)
  },
  encode(state, m) {
    c.uint32.encode(state, m.id)
    c.array(c.string).encode(state, m.matches)
  },
  decode(state) {
    return {
      id: c.uint32.decode(state),
      matches: c.array(c.string).decode(state)
    }
  }
}

export const msgRpcReqEncoding = {
  preencode(state, m) {
    c.uint32.preencode(state, m.id)
    c.string.preencode(state, m.module)
    c.string.preencode(state, m.method)
    c.array(c.string).preencode(state, m.args)
  },
  encode(state, m) {
    c.uint32.encode(state, m.id)
    c.string.encode(state, m.module)
    c.string.encode(state, m.method)
    c.array(c.string).encode(state, m.args)
  },
  decode(state) {
    return {
      id: c.uint32.decode(state),
      module: c.string.decode(state),
      method: c.string.decode(state),
      args: c.array(c.string).decode(state)
    }
  }
}

export const msgRpcResEncoding = {
  preencode(state, m) {
    c.uint32.preencode(state, m.id)
    c.bool.preencode(state, m.success)
    c.string.preencode(state, m.result)
    c.string.preencode(state, m.error)
  },
  encode(state, m) {
    c.uint32.encode(state, m.id)
    c.bool.encode(state, m.success)
    c.string.encode(state, m.result || '')
    c.string.encode(state, m.error || '')
  },
  decode(state) {
    return {
      id: c.uint32.decode(state),
      success: c.bool.decode(state),
      result: c.string.decode(state),
      error: c.string.decode(state)
    }
  }
}