// SQLite query-plan tests pin hot OpenClaw state indexes used by perf proof.
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import type { DatabaseSync } from "node:sqlite";
import { afterEach, describe, expect, it } from "vitest";
import {
  closeOpenClawAgentDatabasesForTest,
  openOpenClawAgentDatabase,
} from "./openclaw-agent-db.js";
import {
  closeOpenClawStateDatabaseForTest,
  openOpenClawStateDatabase,
} from "./openclaw-state-db.js";

function createTempStateDir(): string {
  return fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-sqlite-plan-"));
}

function explainQueryPlan(
  db: DatabaseSync,
  sql: string,
  params: readonly (number | string | null)[] = [],
): string {
  const rows = db.prepare(`EXPLAIN QUERY PLAN ${sql}`).all(...params) as Array<{
    detail?: unknown;
  }>;
  return rows
    .map((row) => (typeof row.detail === "string" ? row.detail : JSON.stringify(row.detail ?? "")))
    .join("\n");
}

function expectPlanUsesIndex(params: {
  db: DatabaseSync;
  indexName: string;
  params?: readonly (number | string | null)[];
  sql: string;
}): void {
  expect(explainQueryPlan(params.db, params.sql, params.params)).toContain(params.indexName);
}

function expectPlanIncludes(params: {
  db: DatabaseSync;
  expected: string;
  params?: readonly (number | string | null)[];
  sql: string;
}): void {
  expect(explainQueryPlan(params.db, params.sql, params.params)).toContain(params.expected);
}

afterEach(() => {
  closeOpenClawAgentDatabasesForTest();
  closeOpenClawStateDatabaseForTest();
});

describe("sqlite hot query plans", () => {
  it("uses shared state indexes for list and queue queries", () => {
    const stateDir = createTempStateDir();
    const database = openOpenClawStateDatabase({
      env: { OPENCLAW_STATE_DIR: stateDir },
    });

    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_cron_jobs_store_order",
      params: ["/state/cron/jobs.json"],
      sql: `
        SELECT job_id, name, updated_at
          FROM cron_jobs
         WHERE store_key = ?
         ORDER BY sort_order ASC, updated_at ASC, job_id
         LIMIT 25
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_cron_jobs_enabled_next_run",
      params: ["/state/cron/jobs.json"],
      sql: `
        SELECT job_id, next_run_at_ms
          FROM cron_jobs
         WHERE store_key = ? AND enabled = 1 AND next_run_at_ms IS NOT NULL
         ORDER BY next_run_at_ms ASC, job_id
         LIMIT 25
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_cron_run_logs_store_ts",
      params: ["/state/cron/jobs.json"],
      sql: `
        SELECT job_id, seq, ts
          FROM cron_run_logs
         WHERE store_key = ?
         ORDER BY ts DESC, seq DESC
         LIMIT 50
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_cron_run_logs_job_status",
      params: ["/state/cron/jobs.json", "job-1", "completed"],
      sql: `
        SELECT seq, ts, status
          FROM cron_run_logs
         WHERE store_key = ? AND job_id = ? AND status = ?
         ORDER BY ts DESC, seq DESC
         LIMIT 50
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_delivery_queue_pending",
      params: ["outbound", "pending"],
      sql: `
        SELECT id, entry_json
          FROM delivery_queue_entries
         WHERE queue_name = ? AND status = ?
         ORDER BY enqueued_at ASC, id
         LIMIT 50
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_delivery_queue_session",
      params: ["outbound", "pending", "agent:main:main"],
      sql: `
        SELECT id, entry_json
          FROM delivery_queue_entries
         WHERE queue_name = ? AND status = ? AND session_key = ?
         ORDER BY enqueued_at ASC, id
         LIMIT 50
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_plugin_state_listing",
      params: ["telegram", "kv"],
      sql: `
        SELECT entry_key, value_json
          FROM plugin_state_entries
         WHERE plugin_id = ? AND namespace = ?
         ORDER BY created_at ASC, entry_key
         LIMIT 50
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_channel_ingress_pending",
      params: ["ingress", "pending"],
      sql: `
        SELECT event_id, payload_json
          FROM channel_ingress_events
         WHERE queue_name = ? AND status = ?
         ORDER BY received_at ASC, event_id
         LIMIT 50
      `,
    });
  });

  it("uses per-agent cache indexes for session metadata and expiry scans", () => {
    const stateDir = createTempStateDir();
    const database = openOpenClawAgentDatabase({
      agentId: "worker-1",
      env: { OPENCLAW_STATE_DIR: stateDir },
    });

    expectPlanIncludes({
      db: database.db,
      expected: "sqlite_autoindex_cache_entries_1",
      params: ["session_entries"],
      sql: `
        SELECT key, value_json
          FROM cache_entries
         WHERE scope = ?
         ORDER BY key ASC
         LIMIT 50
      `,
    });
    expectPlanUsesIndex({
      db: database.db,
      indexName: "idx_agent_cache_expiry",
      params: ["session_entries"],
      sql: `
        SELECT key, expires_at
          FROM cache_entries
         WHERE scope = ? AND expires_at IS NOT NULL
         ORDER BY expires_at ASC, key
         LIMIT 50
      `,
    });
  });
});