context("measurements")

check_api <- function() {
  skip_on_cran()

  code <- NA
  try(code <- httr::status_code(httr::GET(osem_endpoint())))
  if (is.na(code)) skip("API not available")
}

try({
  boxes <- osem_boxes()
 })

test_that("measurements can be retrieved for a phenomenon", {
  check_api()

  measurements <- osem_measurements(x = "Windgeschwindigkeit")
  expect_true(is.data.frame(measurements))
  expect_true("osem_measurements" %in% class(measurements))
})

test_that("measurement retrieval does not give progress information in non-interactive mode", {
  check_api()

  if (!opensensmapr:::is_non_interactive()) skip("interactive session")

  out <- capture.output(measurements <- osem_measurements(x = "Licht"))
  expect_length(out, 0)
})

test_that("a response with no matching senseBoxes gives an error", {
  check_api()

  expect_error(osem_measurements(x = "Windgeschwindigkeit", exposure = "indoor"), "No senseBoxes found")
})

test_that("data.frame can be converted to measurements data.frame", {
  df <- osem_as_measurements(data.frame(c(1,2), c("a", "b")))
  expect_equal(class(df), c("osem_measurements", "data.frame"))
})

test_that("columns can be specified for phenomena", {
  check_api()

  cols <- c("value", "boxId", "boxName")
  measurements <- osem_measurements(x = "Windgeschwindigkeit", columns = cols)
  expect_equal(names(measurements), cols)
})

test_that("measurements can be retrieved for a phenomenon and exposure", {
  check_api()

  measurements <- osem_measurements(x = "Temperatur", exposure = "unknown",
                                    columns = c("value", "boxId", "boxName"))
  expect_equal(nrow(measurements), 0)
})

test_that("measurements of specific boxes can be retrieved for one phenomenon and returns a measurements data.frame", {
  check_api()

  # fix for subsetting
  class(boxes) <- c("data.frame")
  three_boxes <- boxes[1:3,]
  class(boxes) <- c("sensebox", "data.frame")
  three_boxes <- osem_as_sensebox(three_boxes)
  phens <- names(osem_phenomena(three_boxes))

  measurements <- osem_measurements(x = three_boxes, phenomenon = phens[[1]])
  expect_true(is.data.frame(measurements))
  expect_true("osem_measurements" %in% class(measurements))
})

test_that("measurements can be retrieved for a bounding box", {
  check_api()

  sfc <- sf::st_sfc(sf::st_linestring(x = matrix(data = c(7, 8, 50, 51), ncol = 2)), crs = 4326)
  bbox <- sf::st_bbox(sfc)
  measurements <- osem_measurements(x = bbox, phenomenon = "Windrichtung")
  expect_true(all(unique(measurements$lat) > 50))
  expect_true(all(unique(measurements$lat) < 51))
  expect_true(all(unique(measurements$lon) < 8))
  expect_true(all(unique(measurements$lon) > 7))
})

test_that("measurements can be retrieved for a time period", {
  check_api()

  from_date <- as.POSIXct("2018-01-01 12:00:00")
  to_date <- as.POSIXct("2018-01-01 13:00:00")
  measurements <- osem_measurements(x = "Temperature", from = from_date, to = to_date)

  expect_true(all(measurements$createdAt < to_date))
  expect_true(all(measurements$createdAt > from_date))
})

test_that("measurements can be retrieved for a time period > 31 days", {
  check_api()

  from_date <- as.POSIXct("2017-11-01 12:00:00")
  to_date <- as.POSIXct("2018-01-01 13:00:00")
  measurements <- osem_measurements(x = "Windrichtung", from = from_date, to = to_date)

  expect_true(all(measurements$createdAt < to_date))
  expect_true(all(measurements$createdAt > from_date))
})

test_that("both from and to are required when requesting measurements, error otherwise", {
  expect_error(osem_measurements(x = "Temperature", from = as.POSIXct("2017-01-01")), "only together with")
  expect_error(osem_measurements(x = "Temperature", to   = as.POSIXct("2017-01-01")), "only together with")
})

test_that("[.osem_measurements maintains attributes", {
  check_api()

  sfc <- sf::st_sfc(sf::st_linestring(x = matrix(data = c(7, 8, 50, 51), ncol = 2)), crs = 4326)
  bbox <- sf::st_bbox(sfc)
  m <- osem_measurements(x = bbox, phenomenon = "Windrichtung")

  expect_true(all(attributes(m[1:nrow(m), ]) %in% attributes(m)))
})