import { afterAll, beforeAll, beforeEach, describe, expect, it } from "bun:test";
import { mkdtempSync, rmSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { Database } from "bun:sqlite";
import { __dbInternals } from "@/lib/server/db";
import type {
  IssuerOverlayDefinition,
  IssuerOverlayDiagnostics,
  IssuerOverlayStats,
} from "@/lib/server/db/schema";
import {
  ensureIssuerOverlayRow,
  getIssuerOverlay,
  listIssuerOverlayRevisions,
  publishIssuerOverlayRevision,
} from "./issuer-overlays";

let tempDir: string | null = null;
let sqliteClient: Database | null = null;
function resetDbSingletons() {
  const globalState = globalThis as typeof globalThis & {
    __fiscalSqliteClient?: Database;
    __fiscalDrizzleDb?: unknown;
    __financialIngestionSchemaStatus?: unknown;
  };

  globalState.__fiscalSqliteClient?.close();
  globalState.__fiscalSqliteClient = undefined;
  globalState.__fiscalDrizzleDb = undefined;
  globalState.__financialIngestionSchemaStatus = undefined;
}

function sampleDefinition(): IssuerOverlayDefinition {
  return {
    version: "fiscal-v1",
    ticker: "AAPL",
    pack: "core",
    mappings: [
      {
        surface_key: "revenue",
        statement: "income",
        allowed_source_concepts: ["aapl:ServicesRevenue", "aapl:ProductRevenue"],
        allowed_authoritative_concepts: [],
      },
    ],
  };
}

function sampleDiagnostics(): IssuerOverlayDiagnostics {
  return {
    pack: "core",
    sampledSnapshotIds: [11, 12],
    acceptedMappings: [
      {
        qname: "aapl:ServicesRevenue",
        surface_key: "revenue",
        statement: "income",
        reason: "local_name_match",
        source_snapshot_ids: [11, 12],
      },
    ],
    rejectedMappings: [],
  };
}

function sampleStats(): IssuerOverlayStats {
  return {
    pack: "core",
    sampledSnapshotCount: 2,
    sampledSnapshotIds: [11, 12],
    acceptedMappingCount: 1,
    rejectedMappingCount: 0,
    publishedRevisionNumber: null,
  };
}

describe("issuer overlay repo", () => {
  beforeAll(async () => {
    tempDir = mkdtempSync(join(tmpdir(), "fiscal-issuer-overlay-"));
    const env = process.env as Record<string, string | undefined>;
    env.DATABASE_URL = `file:${join(tempDir, "repo.sqlite")}`;
    env.NODE_ENV = "test";

    resetDbSingletons();

    sqliteClient = new Database(join(tempDir, "repo.sqlite"), { create: true });
    sqliteClient.exec("PRAGMA foreign_keys = ON;");
    __dbInternals.ensureLocalSqliteSchema(sqliteClient);

    const globalState = globalThis as typeof globalThis & {
      __fiscalSqliteClient?: Database;
      __fiscalDrizzleDb?: unknown;
    };
    globalState.__fiscalSqliteClient = sqliteClient;
    globalState.__fiscalDrizzleDb = undefined;
  });

  afterAll(() => {
    sqliteClient?.close();
    resetDbSingletons();
    if (tempDir) {
      rmSync(tempDir, { recursive: true, force: true });
    }
  });

  beforeEach(() => {
    sqliteClient?.exec("DELETE FROM issuer_overlay;");
    sqliteClient?.exec("DELETE FROM issuer_overlay_revision;");
  });

  it("creates an empty overlay row on ensure", async () => {
    const overlay = await ensureIssuerOverlayRow("aapl");
    expect(overlay?.ticker).toBe("AAPL");
    expect(overlay?.status).toBe("empty");
    expect(overlay?.active_revision).toBeNull();
  });

  it("publishes and deduplicates overlay revisions by content hash", async () => {
    const first = await publishIssuerOverlayRevision({
      ticker: "AAPL",
      definition: sampleDefinition(),
      diagnostics: sampleDiagnostics(),
      stats: sampleStats(),
    });
    const second = await publishIssuerOverlayRevision({
      ticker: "AAPL",
      definition: sampleDefinition(),
      diagnostics: sampleDiagnostics(),
      stats: sampleStats(),
    });
    const overlay = await getIssuerOverlay("AAPL");
    const revisions = await listIssuerOverlayRevisions("AAPL");

    expect(first.published).toBe(true);
    expect(second.published).toBe(false);
    expect(overlay?.active_revision?.id).toBe(first.revision.id);
    expect(revisions).toHaveLength(1);
  });
});