import { expect, it } from "vitest";

import {
  compareProcessCaptures,
  digestProcessCommitment,
  type ProcessCapture,
} from "../../../src/domain/processCapture.js";

const emptyCapture = (): ProcessCapture => {
  const normalization = {
    paths: true,
    pids: true,
    ports: true,
    time_bucket_ms: 10,
    patterns: [],
  };
  const scenario = { executable_sha256: "0".repeat(64) };
  const comparisonContract = {};
  const shimPlan: readonly unknown[] = [];
  const replayPlan = {};
  return {
    schema_version: 4,
    manifest: {
      rea_version: "test",
      provider_version: "3",
      platform: process.platform,
      architecture: process.arch,
      pty_backend: "node-pty",
      started_at: "2026-01-01T00:00:00.000Z",
      completed_at: "2026-01-01T00:00:00.001Z",
      scenario,
      comparison_contract: comparisonContract,
      shim_plan: shimPlan,
      replay_plan: replayPlan,
      full_scenario_sha256: digestProcessCommitment(scenario),
      comparison_contract_sha256: digestProcessCommitment(comparisonContract),
      executable_sha256: "0".repeat(64),
      normalization_sha256: digestProcessCommitment(normalization),
      shim_plan_sha256: digestProcessCommitment(shimPlan),
      replay_plan_sha256: digestProcessCommitment(replayPlan),
    },
    normalization,
    frames: [],
    rendered_frames: [],
    interaction_events: [],
    exit: { code: 0, signal: null, reason: "exited" },
    settlement: {
      state: "quiesced",
      elapsed_ms: 50,
      cleanup_outcome: "not_required",
    },
    process_samples: [],
    filesystem_checkpoints: [
      { name: "before", at_ms: 0, files: [], effects: [], truncated: false },
      {
        name: "after_settlement",
        at_ms: 50,
        files: [],
        effects: [],
        truncated: false,
      },
    ],
    shim_events: [],
    protocol_events: [],
    replay_transitions: [],
    reactive_run: null,
    event_journal: [],
    files_before: [],
    files_after: [],
    filesystem_effects: [],
    truncated: false,
    limitations: [],
    residual_unknowns: [],
    cleanup: {
      owned_process_group: "verified",
      temporary_root: "removed",
    },
  };
};

it("detects changes in normalized process sample metadata", () => {
  const capture = {
    schema_version: 4 as const,
    manifest: emptyCapture().manifest,
    settlement: emptyCapture().settlement,
    normalization: {
      paths: true,
      pids: true,
      ports: true,
      time_bucket_ms: 10,
      patterns: [],
    },
    frames: [],
    rendered_frames: [],
    interaction_events: [],
    exit: { code: 0, signal: null, reason: "exited" as const },
    process_samples: [
      {
        at_ms: 10,
        pid: 1,
        parent_pid: 0,
        process_group_id: 1,
        session_id: 1,
        command: "worker",
      },
    ],
    filesystem_checkpoints: emptyCapture().filesystem_checkpoints,
    shim_events: [],
    protocol_events: [],
    replay_transitions: [],
    reactive_run: null,
    files_before: [],
    files_after: [],
    filesystem_effects: [],
    truncated: false,
    limitations: [],
    residual_unknowns: [],
    cleanup: {
      owned_process_group: "verified" as const,
      temporary_root: "removed" as const,
    },
  };
  const changed = {
    ...capture,
    process_samples: [
      {
        at_ms: 20,
        pid: 1,
        parent_pid: 2,
        process_group_id: 1,
        session_id: 1,
        command: "worker",
      },
    ],
  };

  const comparison = compareProcessCaptures(capture, changed);
  expect(comparison.process).toBe("changed");
  expect(comparison.status).toBe("changed");
});

it("compares replay state transitions as protocol evidence", () => {
  const replayPlan = {
    machine: {
      initial_state: "anonymous",
      states: [
        { name: "anonymous" },
        { name: "authenticated", terminal: true },
      ],
      transitions: [
        {
          id: "login",
          from: "anonymous",
          to: "authenticated",
          trigger: { protocol: "http", method: "POST", path: "/login" },
          captures: [
            {
              variable: "token",
              value: { source: "request_json", path: ["token"] },
              sensitive: true,
            },
          ],
          actions: [{ type: "http_response", status: 204, body: "" }],
          max_uses: 1,
        },
      ],
      max_transitions: 1,
    },
  };
  const empty = emptyCapture();
  const baseline = {
    ...empty,
    manifest: {
      ...empty.manifest,
      replay_plan: replayPlan,
      replay_plan_sha256: digestProcessCommitment(replayPlan),
    },
  };
  const transitioned = {
    ...baseline,
    replay_transitions: [
      {
        sequence: 0,
        at_ms: 0,
        transition_id: "login",
        state_before: "anonymous",
        state_after: "authenticated",
        sensitive_aliases: ["token"],
      },
    ],
  };

  expect(compareProcessCaptures(baseline, transitioned)).toMatchObject({
    status: "changed",
    protocol: "added",
  });
});