import test from "node:test";
import assert from "node:assert/strict";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";

const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-db-settings-"));
process.env.DATA_DIR = TEST_DATA_DIR;
process.env.DISABLE_SQLITE_AUTO_BACKUP = "true";

const core = await import("../../src/lib/db/core.ts");
const databaseSettings = await import("../../src/lib/db/databaseSettings.ts");
const databaseSettingsRoute = await import("../../src/app/api/settings/database/route.ts");
const purgeRequestHistoryRoute =
  await import("../../src/app/api/settings/purge-request-history/route.ts");
const settingsDb = await import("../../src/lib/db/settings.ts");
const cleanup = await import("../../src/lib/db/cleanup.ts");
const aggregateHistory = await import("../../src/lib/usage/aggregateHistory.ts");

type CountRow = {
  count: number;
};

type UsageSummaryRow = {
  total_requests: number;
  total_input_tokens: number;
  total_output_tokens: number;
  total_cost: number;
};

function resetStorage() {
  core.resetDbInstance();
  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
  fs.mkdirSync(TEST_DATA_DIR, { recursive: true });
}

function makeJsonRequest(method: string, body?: unknown): Request {
  return new Request("http://localhost/api/settings/database", {
    method,
    headers: { "Content-Type": "application/json" },
    body: body === undefined ? undefined : JSON.stringify(body),
  });
}

function insertCallLog(id: string, artifactRelPath: string | null = null) {
  const db = core.getDbInstance();
  db.prepare(
    `
      INSERT INTO call_logs (id, timestamp, method, path, status, detail_state, artifact_relpath)
      VALUES (?, ?, ?, ?, ?, ?, ?)
    `
  ).run(
    id,
    "2026-06-01T12:00:00.000Z",
    "POST",
    "/v1/chat/completions",
    200,
    artifactRelPath ? "ready" : "none",
    artifactRelPath
  );
}

function writeCallLogArtifact(relativePath: string) {
  const absolutePath = path.join(TEST_DATA_DIR, "call_logs", relativePath);
  fs.mkdirSync(path.dirname(absolutePath), { recursive: true });
  fs.writeFileSync(absolutePath, JSON.stringify({ relativePath }), "utf8");
  return absolutePath;
}

test.beforeEach(() => {
  resetStorage();
});

test.after(() => {
  resetStorage();
});

test("database settings route returns mapped stats and persists editable sections", async () => {
  const current = databaseSettings.getUserDatabaseSettings();
  const response = await databaseSettingsRoute.PATCH(
    makeJsonRequest("PATCH", {
      retention: { ...current.retention, callLogs: 12, autoCleanupEnabled: false },
      aggregation: { ...current.aggregation, enabled: false, rawDataRetentionDays: 8 },
    }) as never
  );
  const body = await response.json();

  assert.equal(response.status, 200);
  assert.equal(body.retention.callLogs, 12);
  assert.equal(body.aggregation.rawDataRetentionDays, 8);
  assert.equal(typeof body.location.databasePath, "string");
  assert.equal(typeof body.location.dataDir, "string");
  assert.equal(typeof body.location.walSizeBytes, "number");
  assert.equal(typeof body.stats.databaseSizeBytes, "number");
  assert.equal(typeof body.stats.pageCount, "number");
  assert.equal(typeof body.stats.freelistCount, "number");

  const db = core.getDbInstance();
  const stored = db
    .prepare(
      "SELECT value FROM key_value WHERE namespace = 'databaseSettings' AND key = 'retention.callLogs'"
    )
    .get() as { value: string } | undefined;
  assert.equal(JSON.parse(stored?.value ?? "null"), 12);

  const getResponse = await databaseSettingsRoute.GET(makeJsonRequest("GET") as never);
  const getBody = await getResponse.json();

  assert.equal(getResponse.status, 200);
  assert.equal(getBody.retention.callLogs, 12);
  assert.equal(getBody.aggregation.rawDataRetentionDays, 8);
});

test("database settings reader supports legacy flat keys and lets nested saves win", () => {
  const db = core.getDbInstance();
  db.prepare(
    "INSERT OR REPLACE INTO key_value (namespace, key, value) VALUES ('databaseSettings', ?, ?)"
  ).run("callLogs", JSON.stringify(99));

  assert.equal(databaseSettings.getUserDatabaseSettings().retention.callLogs, 99);

  databaseSettings.updateDatabaseSettings({
    retention: {
      ...databaseSettings.getUserDatabaseSettings().retention,
      callLogs: 7,
    },
  });

  assert.equal(databaseSettings.getUserDatabaseSettings().retention.callLogs, 7);
});

test("database log settings mirror the runtime pipeline toggle", async () => {
  await settingsDb.updateSettings({ call_log_pipeline_enabled: false });

  assert.equal(databaseSettings.getUserDatabaseSettings().logs.callLogPipelineEnabled, false);

  databaseSettings.updateDatabaseSettings({
    logs: {
      ...databaseSettings.getUserDatabaseSettings().logs,
      callLogPipelineEnabled: true,
    },
  });

  const settings = await settingsDb.getSettings();
  assert.equal(settings.call_log_pipeline_enabled, true);
  assert.equal(databaseSettings.getUserDatabaseSettings().logs.callLogPipelineEnabled, true);
});

test("database optimization settings apply SQLite cache size immediately", () => {
  const current = databaseSettings.getUserDatabaseSettings();

  databaseSettings.updateDatabaseSettings({
    optimization: {
      ...current.optimization,
      autoVacuumMode: core.getAutoVacuumMode(),
      pageSize: 4096,
      cacheSize: 16384,
    },
  });

  const db = core.getDbInstance();
  const stored = db
    .prepare(
      "SELECT value FROM key_value WHERE namespace = 'databaseSettings' AND key = 'optimization.cacheSize'"
    )
    .get() as { value: string } | undefined;

  assert.equal(db.pragma("cache_size", { simple: true }), -16384);
  assert.equal(JSON.parse(stored?.value ?? "null"), 16384);
  assert.equal(databaseSettings.getUserDatabaseSettings().optimization.cacheSize, 16384);
});

test("database optimization settings apply SQLite page size immediately", () => {
  const current = databaseSettings.getUserDatabaseSettings();

  databaseSettings.updateDatabaseSettings({
    optimization: {
      ...current.optimization,
      autoVacuumMode: core.getAutoVacuumMode(),
      pageSize: 8192,
      cacheSize: 16384,
    },
  });

  assert.equal(core.getDbInstance().pragma("page_size", { simple: true }), 8192);
  assert.equal(databaseSettings.getUserDatabaseSettings().optimization.pageSize, 8192);
});

test("database optimization cache size is applied when the DB is reopened", () => {
  const db = core.getDbInstance();
  db.prepare(
    "INSERT OR REPLACE INTO key_value (namespace, key, value) VALUES ('databaseSettings', ?, ?)"
  ).run("optimization.cacheSize", JSON.stringify(32768));

  core.resetDbInstance();
  const reopened = core.getDbInstance();

  assert.equal(reopened.pragma("cache_size", { simple: true }), -32768);
});

test("database optimization rejects negative cache size through the API", async () => {
  const current = databaseSettings.getUserDatabaseSettings();
  const response = await databaseSettingsRoute.PATCH(
    makeJsonRequest("PATCH", {
      optimization: {
        ...current.optimization,
        cacheSize: -2000,
      },
    }) as never
  );

  assert.equal(response.status, 400);
});

test("database settings reader normalizes legacy negative cache size to the positive default", () => {
  const db = core.getDbInstance();
  db.prepare(
    "INSERT OR REPLACE INTO key_value (namespace, key, value) VALUES ('databaseSettings', ?, ?)"
  ).run("optimization.cacheSize", JSON.stringify(-2000));

  assert.equal(databaseSettings.getUserDatabaseSettings().optimization.cacheSize, 16384);
});

test("purgeDetailedLogs deletes request_detail_logs", async () => {
  const db = core.getDbInstance();
  db.prepare("INSERT INTO request_detail_logs (id, timestamp, duration_ms) VALUES (?, ?, ?)").run(
    "detail-1",
    new Date().toISOString(),
    10
  );
  db.prepare("INSERT INTO request_detail_logs (id, timestamp, duration_ms) VALUES (?, ?, ?)").run(
    "detail-2",
    new Date().toISOString(),
    20
  );

  const result = await cleanup.purgeDetailedLogs();

  assert.equal(result.errors, 0);
  assert.equal(result.deleted, 2);
  assert.equal(
    (db.prepare("SELECT COUNT(*) AS count FROM request_detail_logs").get() as CountRow).count,
    0
  );
});

test("purgeCallLogs deletes summary rows and local request artifacts", async () => {
  const db = core.getDbInstance();
  const artifactPath = writeCallLogArtifact("2026-06-01/request-1.json");
  const orphanPath = writeCallLogArtifact("2026-06-02/orphan.json");
  insertCallLog("call-1", "2026-06-01/request-1.json");

  const result = await cleanup.purgeCallLogs();

  assert.equal(result.errors, 0);
  assert.equal(result.deleted, 1);
  assert.equal(result.deletedArtifacts, 2);
  assert.equal((db.prepare("SELECT COUNT(*) AS count FROM call_logs").get() as CountRow).count, 0);
  assert.equal(fs.existsSync(artifactPath), false);
  assert.equal(fs.existsSync(orphanPath), false);
  assert.equal(fs.existsSync(path.join(TEST_DATA_DIR, "call_logs")), false);
});

test("purge request history route clears call logs, artifacts, and legacy detail rows", async () => {
  const db = core.getDbInstance();
  const artifactPath = writeCallLogArtifact("2026-06-01/request-route.json");
  insertCallLog("call-route", "2026-06-01/request-route.json");
  db.prepare("INSERT INTO request_detail_logs (id, timestamp, duration_ms) VALUES (?, ?, ?)").run(
    "detail-route",
    "2026-06-01T12:00:01.000Z",
    25
  );

  const response = await purgeRequestHistoryRoute.POST(
    new Request("http://localhost/api/settings/purge-request-history", { method: "POST" })
  );
  const body = await response.json();

  assert.equal(response.status, 200);
  assert.equal(body.deleted, 1);
  assert.equal(body.deletedArtifacts, 1);
  assert.equal(body.deletedDetailedLogs, 1);
  assert.equal(body.errors, 0);
  assert.equal((db.prepare("SELECT COUNT(*) AS count FROM call_logs").get() as CountRow).count, 0);
  assert.equal(
    (db.prepare("SELECT COUNT(*) AS count FROM request_detail_logs").get() as CountRow).count,
    0
  );
  assert.equal(fs.existsSync(artifactPath), false);
});

test("usage aggregation upserts replace recomputed totals instead of adding them twice", async () => {
  const db = core.getDbInstance();
  const insertSnapshot = db.prepare(
    `INSERT INTO quota_snapshots
       (provider, connection_id, window_key, remaining_percentage, is_exhausted, raw_data, created_at)
     VALUES (?, ?, ?, ?, ?, ?, ?)`
  );

  insertSnapshot.run(
    "openai",
    "conn-1",
    "daily",
    90,
    0,
    JSON.stringify({ model: "gpt-test", input_tokens: 10, output_tokens: 4, cost: 0.25 }),
    "2026-05-01 10:15:00"
  );
  insertSnapshot.run(
    "openai",
    "conn-1",
    "daily",
    80,
    0,
    JSON.stringify({ model: "gpt-test", input_tokens: 20, output_tokens: 6, cost: 0.5 }),
    "2026-05-01 10:45:00"
  );

  await aggregateHistory.rollupDailyUsage("2026-05-01", "2026-05-01");
  await aggregateHistory.rollupDailyUsage("2026-05-01", "2026-05-01");
  await aggregateHistory.rollupHourlyQuota("2026-05-01 10:00:00", "2026-05-01 10:59:59");
  await aggregateHistory.rollupHourlyQuota("2026-05-01 10:00:00", "2026-05-01 10:59:59");

  const daily = db.prepare("SELECT * FROM daily_usage_summary").get() as UsageSummaryRow;
  const hourly = db.prepare("SELECT * FROM hourly_usage_summary").get() as UsageSummaryRow;

  assert.equal(daily.total_requests, 2);
  assert.equal(daily.total_input_tokens, 30);
  assert.equal(daily.total_output_tokens, 10);
  assert.equal(daily.total_cost, 0.75);
  assert.equal(hourly.total_requests, 2);
  assert.equal(hourly.total_input_tokens, 30);
  assert.equal(hourly.total_output_tokens, 10);
  assert.equal(hourly.total_cost, 0.75);
});

test("cleanupUsageHistory rolls up and deletes old rows using the same day boundary", async () => {
  const db = core.getDbInstance();
  const oldTimestamp = "2024-01-01T12:00:00.000Z";
  const recentTimestamp = new Date().toISOString();

  databaseSettings.updateDatabaseSettings({
    retention: {
      ...databaseSettings.getUserDatabaseSettings().retention,
      usageHistory: 30,
    },
  });

  const insertUsage = db.prepare(
    `INSERT INTO usage_history (provider, model, timestamp, tokens_input, tokens_output, success, latency_ms)
     VALUES (?, ?, ?, ?, ?, ?, ?)`
  );
  insertUsage.run("openai", "gpt-test", oldTimestamp, 100, 40, 1, 200);
  insertUsage.run("openai", "gpt-test", recentTimestamp, 7, 3, 1, 100);

  const result = await cleanup.cleanupUsageHistory();

  assert.equal(result.errors, 0);
  assert.equal(result.deleted, 1);

  const remaining = db.prepare("SELECT COUNT(*) AS count FROM usage_history").get() as CountRow;
  assert.equal(remaining.count, 1);

  const daily = db.prepare("SELECT * FROM daily_usage_summary").get() as UsageSummaryRow;
  assert.equal(daily.total_requests, 1);
  assert.equal(daily.total_input_tokens, 100);
  assert.equal(daily.total_output_tokens, 40);
});