#!/usr/bin/env bash

set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
readonly ROOT
readonly RESULTS="${ROOT}/results"
readonly IMAGE="serein-cmd-02-dispatch"

if [[ "${RESULTS}" != "${ROOT}/results" ]]; then
  echo "refusing to clear an unexpected results directory" >&2
  exit 65
fi

cd "${ROOT}"

milliseconds() {
  perl -MTime::HiRes=time -e 'printf "%.0f\n", time * 1000'
}

capture() {
  local name="$1"
  local expected_exit="$2"
  shift 2

  local directory="${RESULTS}/${name}"
  local started
  local finished
  local actual_exit

  mkdir -p "${directory}"
  {
    printf '%q' "$1"
    for argument in "${@:2}"; do
      printf ' %q' "${argument}"
    done
    printf '\n'
  } >"${directory}/command.txt"

  started="$(milliseconds)"
  set +e
  "$@" >"${directory}/output.txt.tmp" 2>&1
  actual_exit=$?
  set -e
  finished="$(milliseconds)"

  sed -E -e 's/[[:space:]]+$//' -e '${/^$/d;}' \
    "${directory}/output.txt.tmp" >"${directory}/output.txt"
  rm "${directory}/output.txt.tmp"

  {
    printf 'expected_exit_code=%s\n' "${expected_exit}"
    printf 'exit_code=%s\n' "${actual_exit}"
    printf 'duration_ms=%s\n' "$((finished - started))"
  } >"${directory}/metadata.txt"

  if [[ ${actual_exit} -ne ${expected_exit} ]]; then
    echo "FAILED: ${name} exited ${actual_exit}; expected ${expected_exit}" >&2
    return 1
  fi

  printf '%-48s exit %s as expected\n' "${name}" "${actual_exit}"
}

in_container() {
  docker run --rm \
    --volume "${RESULTS}:/experiment/results" \
    "${IMAGE}" \
    "$@"
}

evidence_test() {
  local evidence_path="$1"
  local filter="$2"

  docker run --rm \
    --volume "${RESULTS}/${evidence_path}:/artifacts" \
    --env "ARTIFACT_DIR=/artifacts" \
    "${IMAGE}" \
    php vendor/bin/phpunit --filter "${filter}"
}

mutant_test() {
  local evidence_path="$1"
  local mutation="$2"
  local filter="$3"

  docker run --rm \
    --volume "${RESULTS}/${evidence_path}:/artifacts" \
    --env "ARTIFACT_DIR=/artifacts" \
    "${IMAGE}" sh -lc \
    "php mutate.php ${mutation} && php vendor/bin/phpunit --filter ${filter}"
}

mutation_diff() {
  local mutation="$1"
  local path="$2"

  docker run --rm "${IMAGE}" sh -lc \
    "cp ${path} /tmp/original.php && php mutate.php ${mutation} >/dev/null && diff -u /tmp/original.php ${path}"
}

rm -rf \
  "${RESULTS}/analysis" \
  "${RESULTS}/behavior" \
  "${RESULTS}/comparison" \
  "${RESULTS}/diffs" \
  "${RESULTS}/environment" \
  "${RESULTS}/integration" \
  "${RESULTS}/negative" \
  "${RESULTS}/setup"
mkdir -p "${RESULTS}"

capture setup/build 0 docker build --tag "${IMAGE}" .
capture environment/php 0 in_container php --version
capture environment/composer-version 0 in_container composer --version
capture environment/packages 0 in_container composer show --locked --direct --no-ansi
capture environment/composer-validate 0 \
  in_container composer validate --no-ansi
capture environment/composer-audit 0 \
  in_container composer audit --locked --no-ansi --no-interaction

capture behavior/direct-cancel 0 \
  evidence_test behavior/direct-cancel direct_path_cancels_a_placed_order
capture behavior/bus-cancel 0 \
  evidence_test behavior/bus-cancel bus_path_cancels_a_placed_order
capture behavior/direct-address 0 \
  evidence_test behavior/direct-address direct_path_changes_a_delivery_address
capture behavior/bus-address 0 \
  evidence_test behavior/bus-address bus_path_changes_a_delivery_address
capture behavior/direct-refusal 0 \
  evidence_test behavior/direct-refusal direct_path_refuses_to_cancel_a_shipped_order
capture behavior/bus-refusal 0 \
  evidence_test behavior/bus-refusal bus_path_refuses_to_cancel_a_shipped_order

capture integration/bus-cancel-pipeline 0 \
  evidence_test integration/bus-cancel-pipeline \
  bus_cancellation_crosses_the_ordered_shared_pipeline
capture integration/bus-address-pipeline 0 \
  evidence_test integration/bus-address-pipeline \
  bus_address_change_crosses_the_same_shared_pipeline
capture integration/direct-wrapper 0 \
  evidence_test integration/direct-wrapper \
  direct_cancellation_keeps_its_typed_wrapper_visible
capture integration/direct-rollback 0 \
  evidence_test integration/direct-rollback \
  direct_path_rolls_back_after_repository_failure
capture integration/bus-rollback 0 \
  evidence_test integration/bus-rollback \
  bus_path_rolls_back_after_repository_failure
capture integration/ordered-failure 0 \
  evidence_test integration/ordered-failure \
  outer_outcome_observes_a_post_handler_failure

capture negative/missing-map 1 \
  mutant_test negative/missing-map missing-map \
  bus_path_cancels_a_placed_order
capture negative/missing-transaction 1 \
  mutant_test negative/missing-transaction missing-transaction \
  bus_path_rolls_back_after_repository_failure
capture negative/missing-outcome 1 \
  mutant_test negative/missing-outcome missing-outcome \
  bus_cancellation_crosses_the_ordered_shared_pipeline
capture negative/wrong-pipe-order 1 \
  mutant_test negative/wrong-pipe-order wrong-pipe-order \
  outer_outcome_observes_a_post_handler_failure
capture negative/direct-wrapper-bypass 1 \
  mutant_test negative/direct-wrapper-bypass direct-wrapper-bypass \
  direct_path_rolls_back_after_repository_failure

capture diffs/missing-map 1 \
  mutation_diff missing-map app/Providers/CommandBusServiceProvider.php
capture diffs/missing-transaction 1 \
  mutation_diff missing-transaction \
  app/Providers/CommandBusServiceProvider.php
capture diffs/missing-outcome 1 \
  mutation_diff missing-outcome app/Providers/CommandBusServiceProvider.php
capture diffs/wrong-pipe-order 1 \
  mutation_diff wrong-pipe-order \
  app/Providers/CommandBusServiceProvider.php
capture diffs/direct-wrapper-bypass 1 \
  mutation_diff direct-wrapper-bypass \
  app/Application/Direct/DirectCancelOrderHandler.php

capture analysis/inventory 0 in_container php analyze.php
capture analysis/bus-controller-bypass 1 \
  in_container php analyze.php tests/fixtures/BusControllerCallsHandler.php
capture analysis/direct-controller-bypass 1 \
  in_container php analyze.php tests/fixtures/DirectControllerCallsDispatcher.php
capture analysis/nested-dispatch 1 \
  in_container php analyze.php tests/fixtures/NestedDispatchHandler.php
capture analysis/command-specific-pipe 1 \
  in_container php analyze.php tests/fixtures/CommandSpecificPipe.php

capture comparison 0 in_container php compare.php

echo "Evidence retained in ${RESULTS}"