#!/usr/bin/env bash
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
POM="$ROOT/pom.xml"
CORE_POM="$ROOT/ta4j-core/pom.xml"
EXAMPLES_POM="$ROOT/ta4j-examples/pom.xml"
WORKFLOW="$ROOT/.github/workflows/test.yml"

fail() { echo "[FAIL] $1" >&2; exit 1; }
pass() { echo "[PASS] $1"; }

expect_file_contains() {
  local file="$1"
  local needle="$2"
  local msg="$3"
  if ! grep -Fq -- "$needle" "$file"; then
    fail "$msg (missing: '$needle')"
  fi
}

expect_file_matches() {
  local file="$1"
  local pattern="$2"
  local msg="$3"
  if ! grep -Eq -- "$pattern" "$file"; then
    fail "$msg (pattern: '$pattern')"
  fi
}

expect_file_not_contains() {
  local file="$1"
  local needle="$2"
  local msg="$3"
  if grep -Fq -- "$needle" "$file"; then
    fail "$msg (unexpected: '$needle')"
  fi
}

expect_execution_contains() {
  local file="$1"
  local execution_id="$2"
  local needle="$3"
  local msg="$4"
  local block
  block="$(awk -v id="$execution_id" '
    /<execution>/ { in_execution=1; block=$0 ORS; next }
    in_execution { block = block $0 ORS }
    /<\/execution>/ {
      if (block ~ "<id>" id "</id>") {
        print block
        found=1
        exit
      }
      in_execution=0
      block=""
    }
    END {
      if (!found) {
        exit 1
      }
    }
  ' "$file")" || fail "$msg (execution not found: '$execution_id')"

  if ! grep -Fq -- "$needle" <<<"$block"; then
    fail "$msg (missing: '$needle' in execution '$execution_id')"
  fi
}

test_parent_declares_advisory_quality_defaults() {
  echo "Running test_parent_declares_advisory_quality_defaults"

  expect_file_matches "$POM" "<spotbugs.version>[0-9]+(\\.[0-9]+)+</spotbugs.version>" "parent pom should pin SpotBugs with an explicit version"
  expect_file_matches "$POM" "<jacoco.version>[0-9]+(\\.[0-9]+)+</jacoco.version>" "parent pom should pin JaCoCo with an explicit version"
  expect_file_contains "$POM" "<ta4j.jacoco.line.minimum>0.80</ta4j.jacoco.line.minimum>" "line coverage threshold should be declared"
  expect_file_contains "$POM" "<ta4j.jacoco.branch.minimum>0.80</ta4j.jacoco.branch.minimum>" "branch coverage threshold should be declared"
  expect_file_not_contains "$POM" "<ta4j.spotbugs.failOnError>" "SpotBugs advisory mode should not rely on a shared property"
  expect_file_not_contains "$POM" "<ta4j.jacoco.haltOnFailure>" "JaCoCo advisory mode should not rely on a shared property"

  pass "test_parent_declares_advisory_quality_defaults"
}

test_parent_manages_quality_plugins_for_verify() {
  echo "Running test_parent_manages_quality_plugins_for_verify"

  expect_file_contains "$POM" "<artifactId>spotbugs-maven-plugin</artifactId>" "parent pom should manage SpotBugs"
  expect_file_contains "$POM" "<artifactId>jacoco-maven-plugin</artifactId>" "parent pom should manage JaCoCo"
  expect_file_contains "$POM" "<artifactId>exec-maven-plugin</artifactId>" "parent pom should skip root exec:java runs"
  expect_file_contains "$POM" "<skip>true</skip>" "parent pom should skip exec:java on the aggregator"
  expect_file_contains "$POM" "<quiet>true</quiet>" "SpotBugs should stay compact in verify logs"
  expect_file_contains "$POM" "@{argLine}" "Surefire should late-bind the JaCoCo agent argLine"
  expect_execution_contains "$POM" "spotbugs-check" "<phase>verify</phase>" "SpotBugs should stay wired into verify"
  expect_execution_contains "$POM" "spotbugs-check" "<failOnError>false</failOnError>" "SpotBugs should stay advisory only for the verify-bound execution"
  expect_execution_contains "$POM" "jacoco-check" "<phase>verify</phase>" "JaCoCo should stay wired into verify"
  expect_execution_contains "$POM" "jacoco-check" "<haltOnFailure>false</haltOnFailure>" "JaCoCo should stay advisory only for the verify-bound execution"

  pass "test_parent_manages_quality_plugins_for_verify"
}

test_modules_opt_in_to_managed_quality_plugins() {
  echo "Running test_modules_opt_in_to_managed_quality_plugins"

  expect_file_contains "$CORE_POM" "<artifactId>spotbugs-maven-plugin</artifactId>" "ta4j-core should opt into SpotBugs"
  expect_file_contains "$CORE_POM" "<artifactId>jacoco-maven-plugin</artifactId>" "ta4j-core should opt into JaCoCo"
  expect_file_contains "$EXAMPLES_POM" "<artifactId>spotbugs-maven-plugin</artifactId>" "ta4j-examples should opt into SpotBugs"
  expect_file_contains "$EXAMPLES_POM" "<artifactId>jacoco-maven-plugin</artifactId>" "ta4j-examples should opt into JaCoCo"
  expect_file_contains "$EXAMPLES_POM" "<exec.mainClass>ta4jexamples.Quickstart</exec.mainClass>" "ta4j-examples should default exec:java to Quickstart"
  expect_file_contains "$EXAMPLES_POM" "<mainClass>\${exec.mainClass}</mainClass>" "ta4j-examples should allow exec:java main-class overrides"

  pass "test_modules_opt_in_to_managed_quality_plugins"
}

test_ci_runs_verify_for_both_jobs() {
  echo "Running test_ci_runs_verify_for_both_jobs"

  expect_file_contains "$WORKFLOW" "run: xvfb-run mvn -B verify" "default CI job should run verify"
  expect_file_contains "$WORKFLOW" "run: xvfb-run mvn -B verify -Dta4j.excludedTestTags=analysis-demo,elliott-macro-cycle-replay" "non-demo CI job should run verify"

  pass "test_ci_runs_verify_for_both_jobs"
}

test_docs_point_to_real_maven_commands() {
  echo "Running test_docs_point_to_real_maven_commands"

  expect_file_contains "$ROOT/README.md" "Run \`mvn verify\` before opening or updating a pull request." "README should point contributors at the real verify command"
  expect_file_contains "$ROOT/README.md" "mvn -pl ta4j-core -am spotbugs:check" "README should document the standalone SpotBugs loop"
  expect_file_contains "$ROOT/README.md" "mvn -pl ta4j-core -am test jacoco:report jacoco:check" "README should document the standalone JaCoCo gate"
  expect_file_contains "$ROOT/README.md" "mvn -pl ta4j-core -am -Dtest=BarSeriesManagerTest -Dsurefire.failIfNoSpecifiedTests=false test jacoco:report" "README should document a focused JaCoCo report-only loop"
  expect_file_contains "$ROOT/README.md" "- [Build commands: Maven](#build-commands-maven)" "README table of contents should link to the renamed build section"
  expect_file_contains "$ROOT/README.md" "mvn -pl ta4j-examples exec:java -Dexec.mainClass=ta4jexamples.backtesting.TradingRecordParityBacktest" "README should demonstrate overriding exec:java with a non-default example"
  expect_file_contains "$ROOT/.github/CONTRIBUTING.md" "**Run this before opening or updating a PR:** \`mvn -B verify\`" "contributing guide should use verify as the canonical PR command"
  expect_file_contains "$ROOT/.github/CONTRIBUTING.md" "mvn -pl ta4j-core -am spotbugs:check" "contributing guide should document the standalone SpotBugs loop"
  expect_file_contains "$ROOT/.github/CONTRIBUTING.md" "mvn -pl ta4j-core -am test jacoco:report jacoco:check" "contributing guide should document the standalone JaCoCo gate"
  expect_file_contains "$ROOT/.github/CONTRIBUTING.md" "mvn -B license:format formatter:format" "contributing guide should keep the formatter and license fix command"
  expect_file_not_contains "$ROOT/README.md" "./mvnw" "README should not advertise a missing Maven Wrapper"

  pass "test_docs_point_to_real_maven_commands"
}

test_parent_declares_advisory_quality_defaults
test_parent_manages_quality_plugins_for_verify
test_modules_opt_in_to_managed_quality_plugins
test_ci_runs_verify_for_both_jobs
test_docs_point_to_real_maven_commands

echo
echo "All quality scan config tests passed."