import 'package:pipe/pipe.dart';
import 'package:test/test.dart';

Finding _finding({
  required String rule,
  String? file,
  int? line,
  Map<String, Object?> data = const {},
}) => Finding(
  rule: rule,
  severity: PipeSeverity.warning,
  confidence: 'high',
  message: 'message',
  file: file,
  line: line,
  data: data,
);

void main() {
  final present = _finding(
    rule: 'emitted-not-rendered',
    file: 'lib/a.dart',
    line: 10,
    data: const {'variant': 'StillBroken'},
  );
  final fixed = _finding(
    rule: 'loading-flag-not-reset',
    file: 'lib/b.dart',
    line: 20,
    data: const {'member': 'loadNow'},
  );

  test('baseline entries round-trip with a readable label', () {
    final encoded = encodeBaseline('/root', [present, fixed]);
    final entries = decodeBaselineEntries(encoded);

    expect(entries, hasLength(2));
    final byLabel = {for (final entry in entries) entry.label: entry};
    expect(byLabel.keys, containsAll(<String>['StillBroken', 'loadNow']));
    expect(byLabel['StillBroken']!.rule, 'emitted-not-rendered');
    expect(byLabel['StillBroken']!.location, 'lib/a.dart:10');
    // The bare fingerprint list must keep working for `check --baseline`.
    expect(decodeBaseline(encoded), hasLength(2));
  });

  test('a legacy fingerprints-only baseline still decodes', () {
    const legacy = '{"version":1,"fingerprints":["r|a.dart|variant=V"]}';
    expect(decodeBaseline(legacy), {'r|a.dart|variant=V'});
    final entries = decodeBaselineEntries(legacy);
    expect(entries.single.label, 'r|a.dart|variant=V');
    expect(entries.single.rule, 'r');
  });

  test('verify separates resolved from still-present', () {
    final report = FindingReport(
      root: '/root',
      findings: [present],
      suppressed: const [],
    );
    final baseline = [
      BaselineEntry(
        fingerprint: present.fingerprint,
        rule: present.rule,
        file: present.file!,
        line: present.line,
        label: 'StillBroken',
      ),
      BaselineEntry(
        fingerprint: fixed.fingerprint,
        rule: fixed.rule,
        file: fixed.file!,
        line: fixed.line,
        label: 'loadNow',
      ),
    ];

    final verification = verifyAgainstBaseline(
      report: report,
      baseline: baseline,
    );

    expect(verification.baselineTotal, 2);
    expect(verification.resolved.map((e) => e.label), ['loadNow']);
    expect(verification.stillPresent.map((e) => e.label), ['StillBroken']);
    expect(verification.newFindings, isEmpty);
    expect(verification.allResolved, isFalse);
    expect(verification.toJson(), containsPair('resolved', 1));
    expect(verification.describe(), contains('these fixes are confirmed'));
    expect(verification.describe(), contains('loadNow'));
  });

  test('allResolved is true only when nothing accepted remains', () {
    final report = FindingReport(
      root: '/root',
      findings: const [],
      suppressed: const [],
    );
    final verification = verifyAgainstBaseline(
      report: report,
      baseline: [
        BaselineEntry(
          fingerprint: fixed.fingerprint,
          rule: fixed.rule,
          file: fixed.file!,
          line: fixed.line,
          label: 'loadNow',
        ),
      ],
    );
    expect(verification.allResolved, isTrue);
    expect(verification.resolved, hasLength(1));
  });

  test('a finding that is new since the baseline is reported as new', () {
    final fresh = _finding(
      rule: 'dead-handler',
      file: 'lib/c.dart',
      line: 1,
      data: const {'event': 'NewlyDead'},
    );
    final report = FindingReport(
      root: '/root',
      findings: [fresh],
      suppressed: const [],
    );
    final verification = verifyAgainstBaseline(
      report: report,
      baseline: const [],
    );
    expect(verification.newFindings.map((f) => f.baselineLabel), ['NewlyDead']);
    expect(verification.resolved, isEmpty);
  });

  test('verify --rule judges only the baselined findings of that rule', () {
    // `verify --rule X` compared against the WHOLE baseline, so every accepted
    // finding of every other rule was absent from the fresh report - because
    // those rules never ran - and was reported as RESOLVED.
    final report = FindingReport(
      root: '/root',
      findings: [present],
      suppressed: const [],
    );
    final verification = verifyAgainstBaseline(
      report: report,
      baseline: [
        BaselineEntry(
          fingerprint: present.fingerprint,
          rule: present.rule,
          file: present.file!,
          line: present.line,
          label: 'StillBroken',
        ),
        BaselineEntry(
          fingerprint: fixed.fingerprint,
          rule: fixed.rule,
          file: fixed.file!,
          line: fixed.line,
          label: 'loadNow',
        ),
        // A fingerprints-only baseline carries no rule; it is the fingerprint's
        // first segment.
        BaselineEntry(
          fingerprint: 'dead-handler|lib/c.dart|event=Old',
          rule: '',
          file: '',
          label: 'dead-handler|lib/c.dart|event=Old',
        ),
      ],
      rules: {'emitted-not-rendered'},
    );

    expect(verification.resolved, isEmpty);
    expect(verification.stillPresent.map((e) => e.label), ['StillBroken']);
    expect(verification.baselineTotal, 1);
    expect(verification.outOfScope, 2);
    expect(verification.describe(), isNot(contains('confirmed')));
    expect(verification.describe(), contains('rules not run'));
  });

  test('a baselined finding in an unscanned file is not resolved', () {
    // Absent from the report because nothing read its file - excluded by
    // analysis_options, or outside the scanned --dir - is not the same as
    // fixed, so it must not be counted as a confirmed fix.
    final outsideDirs = _finding(
      rule: 'dead-handler',
      file: 'test/helpers.dart',
      line: 3,
      data: const {'event': 'OnlyInTests'},
    );
    final report = FindingReport(
      root: '/root',
      findings: const [],
      suppressed: const [],
    );
    BaselineEntry entryOf(Finding finding, String label) => BaselineEntry(
      fingerprint: finding.fingerprint,
      rule: finding.rule,
      file: finding.file!,
      line: finding.line,
      label: label,
    );
    final verification = verifyAgainstBaseline(
      report: report,
      baseline: [
        entryOf(present, 'StillBroken'),
        entryOf(fixed, 'loadNow'),
        entryOf(outsideDirs, 'OnlyInTests'),
      ],
      unscannedFiles: {'lib/b.dart'},
      scannedDirectories: ['lib'],
    );

    expect(verification.resolved.map((e) => e.label), ['StillBroken']);
    expect(
      verification.notScanned.map((e) => e.label),
      unorderedEquals(['loadNow', 'OnlyInTests']),
    );
    expect(verification.allResolved, isFalse);
    expect(verification.toJson(), containsPair('notScanned', 2));
    expect(verification.describe(), contains('NOT SCANNED'));
  });

  test('a finding whose subject was deleted is removed, not resolved', () {
    // nuwayze deleted a dead handler's event ("delete dead firestore query
    // code") and verify printed it under "these fixes are confirmed". Under the
    // default wire-up policy a deletion is not the fix the finding asked for.
    Finding dead(String event, String file) => _finding(
      rule: 'dead-handler',
      file: file,
      line: 5,
      data: {'union': 'E', 'owner': 'B', 'event': event},
    );
    final wired = dead('Wired', 'lib/bloc.dart');
    final deletedHandler = dead('HandlerGone', 'lib/bloc.dart');
    final deletedFile = _finding(
      rule: 'loading-flag-not-reset',
      file: 'lib/gone.dart',
      line: 3,
      data: const {'owner': 'C', 'member': 'load'},
    );
    final memberFixed = _finding(
      rule: 'loading-flag-not-reset',
      file: 'lib/bloc.dart',
      line: 9,
      data: const {'owner': 'C', 'member': 'refresh'},
    );
    final baseline = decodeBaselineEntries(
      encodeBaseline('/root', [
        wired,
        deletedHandler,
        deletedFile,
        memberFixed,
      ]),
    );

    final verification = verifyAgainstBaseline(
      report: FindingReport(
        root: '/root',
        findings: const [],
        suppressed: const [],
      ),
      baseline: baseline,
      existingFiles: const {'lib/bloc.dart'},
      declaredNames: const {'Wired', 'HandlerGone', 'B', 'C'},
      handledEvents: const {'Wired'},
    );

    // Wired still has its handler and is simply no longer reported: a fix.
    // refresh is a member label, which the declaration check cannot judge, so
    // it stays resolved rather than being guessed either way.
    expect(verification.resolved.map((e) => e.label), {'Wired', 'refresh'});
    expect(verification.removed.map((e) => e.label), {'HandlerGone', 'load'});
    expect(verification.allResolved, isTrue, reason: 'removed is still gone');
    expect(verification.describe(), contains('REMOVED'));
    expect(verification.toJson()['removed'], 2);
  });
}