#!/usr/bin/env node
import assert from 'node:assert/strict';
import { spawnSync } from 'node:child_process';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const plannerScript = path.join(__dirname, 'plan_long_task_auto_chain.mjs');

const scenarios = [
  {
    name: 'implementer result with review-required next action -> review dispatch',
    input: {
      gateStatus: 'pass',
      actorStage: 'implementer_result',
      requiredNextAction: 'request_spec_review',
      executionEvidence: {
        modifiedFiles: ['scripts/example.mjs'],
        verificationResult: 'tests pass',
      },
    },
    expected: {
      plannerStatus: 'pass',
      derivedAction: 'dispatch_spec_review',
      dispatchMode: 'dry_run_dispatch',
      autoChainAllowed: true,
      reasonIncludes: 'implementation evidence present',
      requiredEvidenceIncludes: 'executionEvidence',
    },
  },
  {
    name: 'spec review PASS -> code quality review dispatch',
    input: {
      gateStatus: 'pass',
      actorStage: 'spec_review',
      reviewOutcome: 'pass',
      requiredNextAction: 'request_code_quality_review',
      reviewEvidence: {
        reviewer: 'spec-reviewer',
        verdict: 'pass',
      },
    },
    expected: {
      plannerStatus: 'pass',
      derivedAction: 'dispatch_code_quality_review',
      dispatchMode: 'dry_run_dispatch',
      autoChainAllowed: true,
      reasonIncludes: 'review pass evidence present',
      requiredEvidenceIncludes: 'reviewEvidence',
    },
  },
  {
    name: 'explicit blocker -> retry/fix action',
    input: {
      gateStatus: 'pass',
      actorStage: 'review_result',
      blocker: 'tests failed in review',
      requiredNextAction: 'fix_review_findings',
      blockerEvidence: {
        reviewer: 'qa-reviewer',
        finding: 'tests failed',
      },
    },
    expected: {
      plannerStatus: 'pass',
      derivedAction: 'dispatch_fix_slice',
      dispatchMode: 'dry_run_dispatch',
      autoChainAllowed: true,
      reasonIncludes: 'blocker evidence present',
      requiredEvidenceIncludes: 'blockerEvidence',
    },
  },
  {
    name: 'no concrete next action -> none',
    input: {
      gateStatus: 'pass',
      actorStage: 'implementer_result',
      executionEvidence: {
        modifiedFiles: ['scripts/example.mjs'],
      },
    },
    expected: {
      plannerStatus: 'none',
      derivedAction: 'none',
      dispatchMode: 'no_dispatch',
      autoChainAllowed: false,
      reasonIncludes: 'no concrete next action',
      requiredEvidenceIncludes: 'concreteNextAction',
    },
  },
  {
    name: 'gate fail refuses auto-chain',
    input: {
      gateStatus: 'fail',
      actorStage: 'implementer_result',
      requiredNextAction: 'request_spec_review',
      executionEvidence: {
        modifiedFiles: ['scripts/example.mjs'],
      },
    },
    expected: {
      plannerStatus: 'blocked_by_gate',
      derivedAction: 'none',
      dispatchMode: 'no_dispatch',
      autoChainAllowed: false,
      reasonIncludes: 'gateStatus must pass',
      requiredEvidenceIncludes: 'gateStatus=pass',
    },
  },
  {
    name: 'textual review request without implementation evidence -> blocked_by_evidence',
    input: {
      gateStatus: 'pass',
      actorStage: 'implementer_result',
      requiredNextAction: 'request_spec_review',
    },
    expected: {
      plannerStatus: 'blocked_by_evidence',
      derivedAction: 'none',
      dispatchMode: 'no_dispatch',
      autoChainAllowed: false,
      reasonIncludes: 'implementation evidence missing',
      requiredEvidenceIncludes: 'executionEvidence',
    },
  },
];

function runPlanner(input) {
  const result = spawnSync(process.execPath, [plannerScript, '--compact'], {
    input: JSON.stringify(input),
    encoding: 'utf8',
  });

  if (result.status !== 0) {
    throw new Error(`planner script failed with status=${result.status}: ${result.stderr || result.stdout}`);
  }

  let parsed;
  try {
    parsed = JSON.parse(result.stdout);
  } catch (error) {
    throw new Error(`planner script returned invalid JSON: ${error.message}\nstdout=${result.stdout}`);
  }

  return parsed;
}

function requireCoreFields(output) {
  assert.equal(typeof output.plannerStatus, 'string', 'plannerStatus should be string');
  assert.equal(typeof output.derivedAction, 'string', 'derivedAction should be string');
  assert.equal(typeof output.dispatchMode, 'string', 'dispatchMode should be string');
  assert.equal(typeof output.reason, 'string', 'reason should be string');
  assert.ok(Array.isArray(output.requiredEvidence), 'requiredEvidence should be an array');
  assert.equal(typeof output.autoChainAllowed, 'boolean', 'autoChainAllowed should be boolean');
}

function assertScenario(output, expected) {
  assert.equal(output.plannerStatus, expected.plannerStatus, 'plannerStatus mismatch');
  assert.equal(output.derivedAction, expected.derivedAction, 'derivedAction mismatch');
  assert.equal(output.dispatchMode, expected.dispatchMode, 'dispatchMode mismatch');
  assert.equal(output.autoChainAllowed, expected.autoChainAllowed, 'autoChainAllowed mismatch');
  assert.match(output.reason, new RegExp(expected.reasonIncludes.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')));
  assert.ok(
    output.requiredEvidence.includes(expected.requiredEvidenceIncludes),
    `expected requiredEvidence to include: ${expected.requiredEvidenceIncludes}`,
  );
}

const results = [];
let failed = false;

for (const scenario of scenarios) {
  try {
    const output = runPlanner(scenario.input);
    requireCoreFields(output);
    assertScenario(output, scenario.expected);
    results.push({
      scenario: scenario.name,
      ok: true,
      plannerStatus: output.plannerStatus,
      derivedAction: output.derivedAction,
      dispatchMode: output.dispatchMode,
      autoChainAllowed: output.autoChainAllowed,
      reason: output.reason,
      requiredEvidence: output.requiredEvidence,
    });
  } catch (error) {
    failed = true;
    results.push({
      scenario: scenario.name,
      ok: false,
      error: error instanceof Error ? error.message : String(error),
    });
  }
}

const summary = {
  total: results.length,
  passed: results.filter((entry) => entry.ok).length,
  failed: results.filter((entry) => !entry.ok).length,
};

process.stdout.write(`${JSON.stringify({ summary, results }, null, 2)}\n`);

if (failed) process.exit(1);