# Integration tests for complete workflows

test_that("Complete farm calculation workflow works", {
  boundaries <- set_system_boundaries("farm_gate")

  e_enteric <- calc_emissions_enteric(
    n_animals = 100,
    tier = 2,
    avg_milk_yield = 7000,
    boundaries = boundaries
  )

  e_manure <- calc_emissions_manure(
    n_cows = 100,
    manure_system = "liquid_storage",
    include_indirect = TRUE,
    boundaries = boundaries
  )

  e_soil <- calc_emissions_soil(
    n_fertilizer_synthetic = 1500,
    area_ha = 120,
    boundaries = boundaries
  )

  e_energy <- calc_emissions_energy(
    diesel_l = 8000,
    electricity_kwh = 45000,
    country = "UY",
    boundaries = boundaries
  )

  e_inputs <- calc_emissions_inputs(
    conc_kg = 200000,
    fert_n_kg = 1500,
    region = "global",
    boundaries = boundaries
  )

  total <- calc_total_emissions(e_enteric, e_manure, e_soil, e_energy, e_inputs)

  milk_intensity <- calc_intensity_litre(
    total,
    milk_litres = 750000,
    fat = 3.9,
    protein = 3.2
  )

  area_intensity <- calc_intensity_area(
    total,
    area_total_ha = 120,
    area_productive_ha = 115
  )

  expect_s3_class(total, "cf_total")
  expect_true(is.numeric(total$total_co2eq) && total$total_co2eq > 0)
  expect_equal(total$n_sources, 5)

  expect_s3_class(milk_intensity, "cf_intensity")
  expect_true(is.numeric(milk_intensity$intensity_co2eq_per_kg_fpcm) &&
    milk_intensity$intensity_co2eq_per_kg_fpcm > 0)

  expect_s3_class(area_intensity, "cf_area_intensity")
  expect_true(is.numeric(area_intensity$intensity_per_total_ha) &&
    area_intensity$intensity_per_total_ha > 0)
})

test_that("End-to-end batch processing workflow", {
  farms_data <- data.frame(
    FarmID = c("Farm1", "Farm2", "Farm3"),
    Year = c(2023, 2023, 2023),
    Milk_litres = c(600000, 800000, 450000),
    Fat_percent = c(3.8, 4.0, 3.9),
    Protein_percent = c(3.2, 3.3, 3.1),
    Cows_milking = c(90, 120, 70),
    Cows_dry = c(15, 20, 10),
    Heifers_total = c(30, 40, 20),
    Calves_total = c(45, 60, 30),
    Area_total_ha = c(100, 150, 80),
    N_fertilizer_kg = c(5000, 7000, 3000),
    Diesel_litres = c(6000, 8500, 4000),
    Electricity_kWh = c(30000, 45000, 20000),
    Concentrate_feed_kg = c(150000, 200000, 100000),
    stringsAsFactors = FALSE
  )

  boundaries <- set_system_boundaries("farm_gate")

  batch_result <- calc_batch(
    data = farms_data,
    tier = 1,
    boundaries = boundaries,
    benchmark_region = "uruguay"
  )

  expect_s3_class(batch_result, "cf_batch_complete")
  expect_equal(batch_result$summary$n_farms_processed, 3)
  expect_equal(batch_result$summary$n_farms_successful, 3)

  for (i in 1:3) {
    farm <- batch_result$farm_results[[i]]
    expect_true(isTRUE(farm$success))
    expect_true(is.numeric(farm$emissions_total) && farm$emissions_total > 0)
    expect_true(is.numeric(farm$intensity_milk_kg_co2eq_per_kg_fpcm) &&
      farm$intensity_milk_kg_co2eq_per_kg_fpcm > 0)
    expect_equal(farm$benchmark_region, "uruguay")
  }
})

test_that("Partial boundaries workflow excludes non-included sources", {
  boundaries <- set_system_boundaries("partial", include = c("enteric", "manure"))

  e_enteric <- calc_emissions_enteric(n_animals = 100, boundaries = boundaries)
  e_manure <- calc_emissions_manure(n_cows = 100, boundaries = boundaries)
  e_soil <- calc_emissions_soil(n_fertilizer_synthetic = 1000, boundaries = boundaries)
  e_energy <- calc_emissions_energy(diesel_l = 5000, boundaries = boundaries)

  expect_true(is.numeric(e_enteric$co2eq_kg) && e_enteric$co2eq_kg > 0)
  expect_true(is.numeric(e_manure$co2eq_kg) && e_manure$co2eq_kg > 0)

  # Para fuentes excluidas: aceptar distintas implementaciones (0 / NULL / flag excluded / campo ausente)
  soil_excluded <- isTRUE(e_soil$excluded) ||
    is.null(e_soil$co2eq_kg) ||
    (!is.null(e_soil$co2eq_kg) && is.numeric(e_soil$co2eq_kg) && e_soil$co2eq_kg == 0) ||
    (!("co2eq_kg" %in% names(e_soil)))

  energy_excluded <- isTRUE(e_energy$excluded) ||
    is.null(e_energy$co2eq_kg) ||
    (!is.null(e_energy$co2eq_kg) && is.numeric(e_energy$co2eq_kg) && e_energy$co2eq_kg == 0) ||
    (!("co2eq_kg" %in% names(e_energy)))

  expect_true(soil_excluded)
  expect_true(energy_excluded)

  total <- calc_total_emissions(e_enteric, e_manure, e_soil, e_energy)

  expect_true(is.numeric(total$total_co2eq) && total$total_co2eq > 0)

  # Total debería coincidir con la suma de incluidas.
  expect_equal(total$total_co2eq, e_enteric$co2eq_kg + e_manure$co2eq_kg)
})