# library(testthat)
# rm(list=ls())
# testthat::test_file("tests/testthat/test-auto_rate.R")
# covr::file_coverage("R/auto_rate.R", "tests/testthat/test-auto_rate.R")
# cvr <- covr::package_coverage()
# covr::report(cvr)

capture.output({  ## stops printing outputs on assigning

  ## 2 col data from urchins.rd so it's fast, but does not output constant
  ## multi column warnings
  urch_data <- urchins.rd[,1:2]


  test_that("auto_rate accepts inspect objects", {
    insp <- suppressWarnings(inspect(urch_data))
    expect_error(auto_rate(insp), regexp = NA)
  })

  test_that("auto_rate stops if input is not a df (or inspect type object)", {
    expect_error(auto_rate(as.matrix(urch_data[1,1:2])),
                 regexp = "auto_rate: Input data must be of class 'data.frame' or 'inspect'")
  })

  test_that("auto_rate accepts multi column dataset", {
    expect_warning(auto_rate(urchins.rd),
                   regexp = "Multi-column dataset detected")
  })

  test_that("auto_rate subsets out 2 columns from larger dataset", {
    ar <- suppressWarnings(auto_rate(urchins.rd))
    expect_equal(ncol(ar$dataframe), 2)
  })

  test_that("auto_rate stops with malformed method", {
    expect_error(auto_rate(urch_data, method = "wrong"),
                 regexp = "auto_rate: 'method' input not recognised.")
  })

  test_that("calc_rate - stops when 'x' input has only 1 row of data", {
    expect_error(auto_rate(sardine.rd[1,1:2], plot = F),
                 "auto_rate: Input data contains only 1 row. Please check inputs.")
  })

  test_that("auto_rate works using default inputs", {
    ar <- auto_rate(urch_data, plot = F)
    expect_is(ar,
              "auto_rate")
    expect_is(ar$rate,
              "numeric")
    expect_is(ar$dataframe,
              "data.frame")
  })

  test_that("auto_rate works by default with `highest` input", {
    ar <- auto_rate(urch_data, plot = F, method = "highest")
    expect_is(ar,
              "auto_rate")
    ar <- auto_rate(urch_data, plot = F, method = "highest", width = 10, by = "time")
    expect_is(ar,
              "auto_rate")
  })

  test_that("auto_rate  works by default with `lowest` input", {
    ar <- auto_rate(urch_data, plot = F, method = "lowest")
    expect_is(ar,
              "auto_rate")
    ar <- auto_rate(urch_data, plot = F, method = "lowest", width = 10, by = "time")
    expect_is(ar,
              "auto_rate")
  })

  test_that("auto_rate  will perform interval method using default values", {
    ar <- auto_rate(urch_data, method = "interval", plot = F)
    expect_is(ar,
              "auto_rate")
  })

  test_that("auto_rate can be plotted with default method", {
    ## NB - This saves a Rplots.pdf to testthat directory
    ## Don't know why
    ## Can't see another way of doing this
    ar <- auto_rate(urch_data)
    expect_error(plot(ar), regex = NA)
    suppressWarnings(file.remove("Rplots.pdf"))
  })

  test_that("auto_rate can be plotted with highest/lowest/interval methods", {
    ar <- auto_rate(urch_data, method = "highest", plot = F)
    expect_error(plot(ar), regex = NA)

    ar <- auto_rate(urch_data, method = "lowest", plot = F)
    expect_error(plot(ar), regex = NA)

    ar <- auto_rate(urch_data, method = "interval", plot = F)
    expect_error(plot(ar), regex = NA)
    suppressWarnings(file.remove("Rplots.pdf"))
  })

  test_that("auto_rate: panels 1 to 6 can be plot with panel", {
    ## plots individual panels
    ar <- auto_rate(urch_data, plot = F)
    expect_output(plot(ar, panel =1))
    expect_output(plot(ar, panel =2))
    expect_output(plot(ar, panel =3))
    expect_output(plot(ar, panel =4))
    expect_output(plot(ar, panel =5))
    expect_output(plot(ar, panel =6))
  })

  test_that("auto_rate: different results can be plot with pos", {
    ## plots individual panels
    ar <- auto_rate(urch_data, plot = F)
    expect_output(plot(ar, pos =1))
    expect_output(plot(ar, pos =2))
    expect_output(plot(ar, pos =3))
    expect_output(plot(ar, pos =4))
  })


  test_that("auto_rate: S3 generics work for different methods", {
    ar <- auto_rate(urch_data, method = "linear", plot = F)
    expect_output(print(ar))
    expect_output(summary(ar))
    expect_output(mean(ar))
    ar <- auto_rate(urch_data, method = "highest", plot = F)
    expect_output(print(ar))
    expect_output(summary(ar))
    expect_output(mean(ar))
    ar <- auto_rate(urch_data, method = "highest", plot = F)
    expect_output(print(ar))
    expect_output(summary(ar))
    expect_output(mean(ar))
    ar <- auto_rate(urch_data, method = "interval", plot = F)
    expect_output(print(ar))
    expect_output(summary(ar))
    expect_output(mean(ar))
  })

  test_that("auto_rate summary works with different pos", {
    ar <- auto_rate(urch_data)
    expect_output(summary(ar, pos = 2))
  })

  test_that("auto_rate print and summary works when there are more than 5 results", {
    ar <- auto_rate(urch_data, method = "interval", plot = F, width = 0.1)
    expect_output(print(ar))
    expect_output(summary(ar))
  })

  test_that("auto_rate summary works with print.kds", {
    ar <- auto_rate(urch_data, method = "linear", plot = F, width = 0.1)
    expect_output(summary(ar, print.kds = TRUE))
    expect_output(summary(ar, print.kds = TRUE),
                  "=== Kernel Density Summary ===")
  })

  test_that("auto_rate summary export = TRUE works", {
    ar <- auto_rate(urch_data, plot = F)
    expect_output(summary(ar, export = TRUE))
  })

  test_that("static_roll (auto_rate) outputs a data frame object", {
    sroll <- static_roll(urch_data, 40)
    expect_is(sroll,
              "data.frame")
  })

  test_that("time_roll (auto_rate) produces data.frame object", {
    troll <- time_roll(urch_data, width = 10)
    expect_is(troll,
              "data.frame")
  })

  test_that("time_lm (auto_rate) produces data.frame object", {
    tlm <- time_lm(urch_data, 10, 50)
    expect_is(tlm,
              "data.frame")
  })

  test_that("auto_rate works with variations of `by` input", {
    expect_error(auto_rate(urch_data, plot = F, by = "Time"), regexp = NA)
    expect_error(auto_rate(urch_data, plot = F, by = "T"), regexp = NA)
    expect_error(auto_rate(urch_data, plot = F, by = "Row"), regexp = NA)
    expect_error(auto_rate(urch_data, plot = F, by = "r"), regexp = NA)
  })

  test_that("auto_rate error produced with wrong by", {
    expect_error(auto_rate(urch_data, plot = F, by = "oxygen"),
                 "auto_rate: 'by' input not valid or not recognised.")
  })

  test_that("auto_rate works with method = interval and by = time", {
    int_tm <- auto_rate(urch_data, plot = F, method = "interval", by = "Time")
    expect_equal(int_tm$rate[1],
                 -0.0335646)
  })

  test_that("auto_rate stopes even if width is set to width of entire data", {
    expect_error(auto_rate(urch_data, width = 271, by = "row", method = "lowest", plot = F),
                 regexp = "auto_rate: 'width' cannot be the total number of rows in the input data")
  })

  test_that("auto_rate works if width is set to less than 1", {
    expect_error(auto_rate(urch_data, width = 0.5, by = "row", method = "lowest", plot = F),
                 regexp = NA)
  })

  test_that("auto_rate stops if width is too high", {
    expect_error(auto_rate(urch_data, width = 272, by = "row", method = "lowest", plot = F),
                 regexp = "auto_rate: 'width' exceeds length of dataset")
  })


  # methods -----------------------------------------------------------------

  test_that("auto_rate outputs expected results when method = 'linear'", {

    ar_obj_lin <- auto_rate(urch_data, method = "linear", plot = FALSE)
    ## exact value with these data
    expect_equal(ar_obj_lin$rate[1],
                 -0.02926567)
    ## should be 4 results
    expect_equal(length(ar_obj_lin$rate),
                 4)
    ## output has elements not in other methods
    expect_false(is.null(ar_obj_lin$metadata$total_peaks))
    expect_false(is.null(ar_obj_lin$metadata$kde_bw))
    expect_false(is.null(ar_obj_lin$density))
    expect_false(is.null(ar_obj_lin$peaks))
    expect_false(is.null(ar_obj_lin$density$bw))
  })

  test_that("auto_rate outputs expected results when method = 'interval'", {

    ar_obj_int <- auto_rate(urch_data, method = "interval", plot = FALSE)
    ## exact value with these data
    expect_equal(ar_obj_int$rate[1],
                 -0.03399183)
    ## should be 5 results
    expect_equal(length(ar_obj_int$rate),
                 5)
  })

  ## test objects
  ar_obj_high <- auto_rate(urch_data, method = "highest", plot = FALSE)
  ar_obj_low <- auto_rate(urch_data, method = "lowest", plot = FALSE)
  ar_obj_maximum <- auto_rate(urch_data, method = "maximum", plot = FALSE)
  ar_obj_minimum <- auto_rate(urch_data, method = "minimum", plot = FALSE)
  ar_obj_max <- suppressWarnings(auto_rate(urch_data, method = "max", plot = FALSE)) # OLD METHOD
  ar_obj_min <- suppressWarnings(auto_rate(urch_data, method = "min", plot = FALSE)) # OLD METHOD

  ## reverse data for testing absolute rate ordering
  urch_data_rev <- urch_data
  urch_data_rev[[2]] <- rev(urch_data_rev[[2]])

   test_that("auto_rate outputs expected results when method = 'highest'", {
    ## these should all be the same with negative rates
    skip_on_cran()
    expect_equal(ar_obj_high$rate,
                 rev(ar_obj_low$rate))
    expect_equal(ar_obj_high$rate,
                 ar_obj_minimum$rate)
    expect_equal(rev(ar_obj_low$rate),
                 ar_obj_minimum$rate)
    ## should be 218 results
    expect_equal(length(ar_obj_high$rate),
                 218)
    ## stops when mix of positive and negative rates
    expect_error(auto_rate(intermittent.rd, method = "highest", plot = FALSE),
                 regexp = "auto_rate: Analysis produces both negative and positive rates.")
    ## correctly orders by absolute rate
    expect_equal(ar_obj_high$rate,
                 -1 * auto_rate(urch_data_rev, method = "highest", plot = FALSE)$rate)
  })

  test_that("auto_rate outputs expected results when method = 'lowest'", {
    ## these should all be the same with negative rates
    skip_on_cran()
    expect_equal(ar_obj_low$rate,
                 rev(ar_obj_high$rate))
    expect_equal(ar_obj_low$rate,
                 ar_obj_maximum$rate)
    expect_equal(rev(ar_obj_high$rate),
                 ar_obj_maximum$rate)
    ## should be 218 results
    expect_equal(length(ar_obj_low$rate),
                 218)
    ## stops when mix of positive and negative rates
    expect_error(auto_rate(intermittent.rd, method = "lowest", plot = FALSE),
                 regexp = "auto_rate: Analysis produces both negative and positive rates.")
    ## correctly orders by absolute rate
    expect_equal(ar_obj_low$rate,
                 -1 * auto_rate(urch_data_rev, method = "lowest", plot = FALSE)$rate)
  })

  test_that("auto_rate outputs expected results when method = 'maximum'", {
    ## these should all be the same with negative rates
    skip_on_cran()
    expect_equal(ar_obj_maximum$rate,
                 rev(ar_obj_minimum$rate))
    expect_equal(ar_obj_maximum$rate,
                 ar_obj_min$rate)
    expect_equal(rev(ar_obj_minimum$rate),
                 ar_obj_min$rate)
    ## should be 218 results
    expect_equal(length(ar_obj_maximum$rate),
                 218)
    ## message when mix of positive and negative rates
    expect_message(auto_rate(intermittent.rd, method = "maximum", plot = FALSE),
                   regexp = "auto_rate: Note dataset contains both negative and positive rates.")
    ## correctly orders by numerical maximum rate
    expect_equal(auto_rate(intermittent.rd, method = "maximum", plot = FALSE)$rate,
                 rev(auto_rate(intermittent.rd, method = "minimum", plot = FALSE)$rate))
  })

  test_that("auto_rate outputs expected results when method = 'minimum'", {
    ## these should all be the same with negative rates
    skip_on_cran()
    expect_equal(ar_obj_minimum$rate,
                 rev(ar_obj_maximum$rate))
    expect_equal(ar_obj_minimum$rate,
                 ar_obj_max$rate)
    expect_equal(rev(ar_obj_maximum$rate),
                 ar_obj_max$rate)
    ## should be 218 results
    expect_equal(length(ar_obj_minimum$rate),
                 218)
    ## message when mix of positive and negative rates
    expect_message(auto_rate(intermittent.rd, method = "minimum", plot = FALSE),
                   regexp = "auto_rate: Note dataset contains both negative and positive rates.")
    ## correctly orders by numerical minimum rate
    expect_equal(auto_rate(intermittent.rd, method = "minimum", plot = FALSE)$rate,
                 rev(auto_rate(intermittent.rd, method = "maximum", plot = FALSE)$rate))
  })


  ### OLD METHODS OF MAX/MIN
  test_that("auto_rate outputs expected results when method = 'max'", {
    ## these should all be the same with negative rates
    expect_equal(ar_obj_max$rate,
                 rev(ar_obj_min$rate))
    expect_equal(ar_obj_max$rate,
                 ar_obj_minimum$rate)
    ## should be 218 results
    expect_equal(length(ar_obj_max$rate),
                 218)
    ## message when mix of positive and negative rates
    expect_message(suppressWarnings(auto_rate(intermittent.rd, method = "max", plot = FALSE)),
                   regexp = "auto_rate: Note dataset contains both negative and positive rates.")
    expect_warning(auto_rate(intermittent.rd, method = "max", plot = FALSE),
                   regexp = "auto_rate: The 'min' and 'max' methods have been deprecated")
    ## INCORRECTLY orders by numerical max rate
    ## this was the original behaviour
    expect_equal(suppressWarnings(auto_rate(intermittent.rd, method = "max", plot = FALSE)$rate),
                 auto_rate(intermittent.rd, method = "minimum", plot = FALSE)$rate)
  })

  test_that("auto_rate outputs expected results when method = 'min'", {
    ## these should all be the same with negative rates
    expect_equal(ar_obj_min$rate,
                 rev(ar_obj_max$rate))
    expect_equal(ar_obj_min$rate,
                 ar_obj_maximum$rate)
    ## should be 218 results
    expect_equal(length(ar_obj_min$rate),
                 218)
    ## message when mix of positive and negative rates
    expect_message(suppressWarnings(auto_rate(intermittent.rd, method = "min", plot = FALSE)),
                   regexp = "auto_rate: Note dataset contains both negative and positive rates.")
    expect_warning(auto_rate(intermittent.rd, method = "min", plot = FALSE),
                   regexp = "auto_rate: The 'min' and 'max' methods have been deprecated")
    ## INCORRECTLY orders by numerical min rate
    ## this was the original behaviour
    expect_equal(suppressWarnings(auto_rate(intermittent.rd, method = "min", plot = FALSE)$rate),
                 auto_rate(intermittent.rd, method = "maximum", plot = FALSE)$rate)
  })

  test_that("auto_rate works when there are NA in the 'time' data", {

    input_na <- squid.rd
    input_na[200:205,1] <- NA ##  time NA
    input_na[8000,1] <- NA ##  time NA

    expect_error(auto_rate(input_na),
                 NA)
    # this will cause errors in future if auto_rate changes, but for now
    # test output value
    expect_equal(auto_rate(input_na)$rate[1],
                 -0.0003067157)
  })


  test_that("auto_rate works when there are NA in the 'oxygen' data", {

    input_na <- squid.rd
    input_na[200:205,2] <- NA ##  time NA
    input_na[400:405,2] <- NA ##  time NA

    expect_error(auto_rate(input_na),
                 NA)

  })

  test_that("auto_rate - plot defaults are correctly restored", {

    # reset plotting first
    dev.off()
    # save par before
    parb4 <- par(no.readonly = TRUE)
    # now use a fn with plot
    auto_rate(squid.rd[1:1000,])
    # save after
    paraft <- par(no.readonly = TRUE)
    # mai is something changed from the default,
    # so if par settings not restored properly this should fail
    expect_identical(parb4$mai,
                     paraft$mai)

  })



}) ## end capture.output