#!/usr/bin/env bash
# Runs the three end-to-end scenarios this article is built on and writes what actually
# happened -- console output plus the real BATCH_STEP_EXECUTION and PRODUCT rows -- to
# docs/output/. Nothing here is retyped; the numbers in the article come out of these files.
#
#   ./scripts/capture-scenarios.sh
#
# Needs target/spring-batch-1.0.0.jar (run `mvn -B -o -DskipTests package` first) and a JDK 25.
# Each scenario gets its own file-based H2 database under scenario-data/<name>/ so the three
# runs never interfere with each other.
set -euo pipefail
cd "$(dirname "$0")/.."

JAR=target/spring-batch-1.0.0.jar
: "${JAR:?run mvn -B -o -DskipTests package first}"
H2_JAR=$(find "$HOME/.m2" -name 'h2-2.4.240.jar' | head -1)
mkdir -p docs/output
rm -rf scenario-data
mkdir -p scenario-data

query() {
  # $1 = db dir, $2 = sql
  java -cp "$H2_JAR" org.h2.tools.Shell -url "jdbc:h2:file:${PWD}/$1/db" -user sa -password "" -sql "$2" 2>/dev/null \
    | grep -v '^$'
}

run_scenario() {
  # $1 = name, $2 = profile, $3 = source csv
  local name="$1" profile="$2" src="$3" dir
  dir="scenario-data/$1"
  mkdir -p "$dir"
  cp "$src" "$dir/input.csv"
  java -jar "$JAR" \
    --spring.profiles.active="$profile" \
    --import.file="file:${dir}/input.csv" \
    --spring.datasource.url="jdbc:h2:file:${PWD}/${dir}/db" \
    2>&1 | grep -E "REPORT:|JOB FINISHED|SKIPPED on write|DuplicateKeyException:|WARN.*ProductValidatingProcessor|Executing step|executed in" || true
}

echo "== scenario: clean (05-happy-path.txt)"
{
  echo "# The happy path: 60 rows in, 58 products out"
  echo
  echo '$ java -jar target/spring-batch-1.0.0.jar --spring.profiles.active=clean \'
  echo '    --import.file=file:scenario-data/clean-demo/input.csv \'
  echo '    --spring.datasource.url=jdbc:h2:file:.../scenario-data/clean-demo/db'
  echo
  run_scenario clean-demo clean src/main/resources/data/products.csv
  echo
  echo '$ SELECT read_count, filter_count, write_count, commit_count FROM BATCH_STEP_EXECUTION;'
  query scenario-data/clean-demo "SELECT READ_COUNT, FILTER_COUNT, WRITE_COUNT, COMMIT_COUNT FROM BATCH_STEP_EXECUTION WHERE STEP_NAME='importStep';"
} > docs/output/05-happy-path.txt

echo "== scenario: broken, run 1 (07-restart-run1-fails.txt)"
{
  echo "# Run 1: the poisoned duplicate at row 47 fails the whole chunk"
  echo
  echo '$ java -jar target/spring-batch-1.0.0.jar --spring.profiles.active=broken \'
  echo '    --import.file=file:scenario-data/restart-demo/input.csv \'
  echo '    --spring.datasource.url=jdbc:h2:file:.../scenario-data/restart-demo/db'
  echo
  run_scenario restart-demo broken src/main/resources/data/products-poison.csv
  echo
  echo '$ SELECT status, read_count, filter_count, write_count, commit_count, rollback_count FROM BATCH_STEP_EXECUTION;'
  query scenario-data/restart-demo "SELECT STATUS, READ_COUNT, FILTER_COUNT, WRITE_COUNT, COMMIT_COUNT, ROLLBACK_COUNT FROM BATCH_STEP_EXECUTION WHERE STEP_NAME='importStep';"
  echo
  echo '$ SELECT COUNT(*) FROM PRODUCT;'
  query scenario-data/restart-demo "SELECT COUNT(*) FROM PRODUCT;"
} > docs/output/07-restart-run1-fails.txt

echo "== fixing the duplicate in place (same file, same line count) =="
sed -i '48s/^ABC-0005,Widget 47,1047$/ABC-0999,Widget 47,1047/' scenario-data/restart-demo/input.csv
grep -n "Widget 47" scenario-data/restart-demo/input.csv

echo "== scenario: broken, run 2 = restart in a fresh JVM (07-restart-run2-resumes.txt)"
{
  echo "# Run 2: a brand-new JVM, the SAME job parameters, the corrected file"
  echo
  echo "sed -i '48s/ABC-0005/ABC-0999/' scenario-data/restart-demo/input.csv   # the only change"
  echo
  echo '$ java -jar target/spring-batch-1.0.0.jar --spring.profiles.active=broken \'
  echo '    --import.file=file:scenario-data/restart-demo/input.csv \'
  echo '    --spring.datasource.url=jdbc:h2:file:.../scenario-data/restart-demo/db   # same db file'
  echo
  java -jar "$JAR" \
    --spring.profiles.active=broken \
    --import.file="file:scenario-data/restart-demo/input.csv" \
    --spring.datasource.url="jdbc:h2:file:${PWD}/scenario-data/restart-demo/db" \
    2>&1 | grep -E "REPORT:|JOB FINISHED|Executing step|executed in" || true
  echo
  echo '$ SELECT step_execution_id, job_execution_id, status, read_count, write_count, commit_count, rollback_count FROM BATCH_STEP_EXECUTION ORDER BY step_execution_id;'
  query scenario-data/restart-demo "SELECT STEP_EXECUTION_ID, JOB_EXECUTION_ID, STATUS, READ_COUNT, WRITE_COUNT, COMMIT_COUNT, ROLLBACK_COUNT FROM BATCH_STEP_EXECUTION WHERE STEP_NAME='importStep' ORDER BY STEP_EXECUTION_ID;"
  echo
  echo '$ SELECT COUNT(*) FROM PRODUCT;'
  query scenario-data/restart-demo "SELECT COUNT(*) FROM PRODUCT;"
} > docs/output/08-restart-run2-resumes.txt

echo "== scenario: skip (10-skip-instead-of-fail.txt)"
{
  echo "# faultTolerant().skip(DataIntegrityViolationException.class): one bad row, job still COMPLETES"
  echo
  echo '$ java -jar target/spring-batch-1.0.0.jar --spring.profiles.active=skip \'
  echo '    --import.file=file:scenario-data/skip-demo/input.csv \'
  echo '    --spring.datasource.url=jdbc:h2:file:.../scenario-data/skip-demo/db'
  echo
  run_scenario skip-demo skip src/main/resources/data/products-poison.csv
  echo
  echo '$ SELECT status, read_count, filter_count, write_count, write_skip_count, commit_count, rollback_count FROM BATCH_STEP_EXECUTION;'
  query scenario-data/skip-demo "SELECT STATUS, READ_COUNT, FILTER_COUNT, WRITE_COUNT, WRITE_SKIP_COUNT, COMMIT_COUNT, ROLLBACK_COUNT FROM BATCH_STEP_EXECUTION WHERE STEP_NAME='importStep';"
  echo
  echo '$ SELECT COUNT(*) FROM PRODUCT;'
  query scenario-data/skip-demo "SELECT COUNT(*) FROM PRODUCT;"
} > docs/output/10-skip-instead-of-fail.txt

echo "== scenario: resourceless (11-resourceless-forgets-everything.txt)"
rm -rf scenario-data/resourceless-demo
mkdir -p scenario-data/resourceless-demo
cp src/main/resources/data/products.csv scenario-data/resourceless-demo/input.csv
{
  echo "# --spring.autoconfigure.exclude=...BatchJdbcAutoConfiguration: same job, same params, no memory"
  echo
  echo '$ java -jar target/spring-batch-1.0.0.jar --spring.profiles.active=clean \'
  echo '    --spring.autoconfigure.exclude=org.springframework.boot.batch.jdbc.autoconfigure.BatchJdbcAutoConfiguration \'
  echo '    --import.file=file:scenario-data/resourceless-demo/input.csv \'
  echo '    --spring.datasource.url=jdbc:h2:file:.../scenario-data/resourceless-demo/db'
  echo
  echo "-- run 1 --"
  java -jar "$JAR" \
    --spring.profiles.active=clean \
    --spring.autoconfigure.exclude=org.springframework.boot.batch.jdbc.autoconfigure.BatchJdbcAutoConfiguration \
    --import.file="file:scenario-data/resourceless-demo/input.csv" \
    --spring.datasource.url="jdbc:h2:file:${PWD}/scenario-data/resourceless-demo/db" \
    2>&1 | grep -E "REPORT:|JOB FINISHED" || true
  echo
  echo "-- run 2: a second, completely fresh JVM, same jar, same job parameters, same PRODUCT table --"
  java -jar "$JAR" \
    --spring.profiles.active=clean \
    --spring.autoconfigure.exclude=org.springframework.boot.batch.jdbc.autoconfigure.BatchJdbcAutoConfiguration \
    --import.file="file:scenario-data/resourceless-demo/input.csv" \
    --spring.datasource.url="jdbc:h2:file:${PWD}/scenario-data/resourceless-demo/db" \
    2>&1 | grep -E "REPORT:|JOB FINISHED|DuplicateKeyException:" | head -3 || true
  echo
  echo "No JobInstanceAlreadyCompleteException on run 2 -- the resourceless JobRepository has no idea"
  echo "run 1 ever happened, so it tries the whole job again and collides with what run 1 already"
  echo "wrote to the PRODUCT table. With spring-boot-starter-batch-jdbc (the default configuration"
  echo "used everywhere else in this module) run 2 throws JobInstanceAlreadyCompleteException instead,"
  echo "which ImportRunner treats as \"nothing to do\" -- see docs/07-restartability.md."
} > docs/output/11-resourceless-forgets-everything.txt

echo
echo "docs/output:"
ls -1 docs/output