import { randomUUID } from "node:crypto";
import { PrismaClient } from "@prisma/client";
import { afterAll, beforeAll, beforeEach, describe, expect, it } from "vitest";
import { PrismaService } from "../../apps/api/src/database/prisma.service";
import {
  assertSafeTestDatabaseUrl,
  resolveTestDatabaseUrl,
} from "../../prisma/database-safety";

const databaseUrl = resolveTestDatabaseUrl();
const prisma = new PrismaClient({ datasources: { db: { url: databaseUrl } } });

async function expectConstraintViolation(operation: Promise<unknown>) {
  await expect(operation).rejects.toMatchObject({
    name: "PrismaClientUnknownRequestError",
  });
}

async function expectUniqueViolation(operation: Promise<unknown>) {
  await expect(operation).rejects.toMatchObject({ code: "P2002" });
}

async function createAccount(suffix: string) {
  return prisma.account.create({
    data: {
      phoneCiphertext: Buffer.from(`ciphertext-${suffix}`),
      phoneHmac: `hmac-${suffix}`,
      anonymousProfile: {
        create: {
          publicId: randomUUID(),
          nickname: `漂友-${suffix}`,
          avatarColor: "#66CCFF",
          reviewStatus: "APPROVED",
        },
      },
    },
  });
}

async function createBottle(authorId: string, suffix: string) {
  return prisma.bottle.create({
    data: {
      authorId,
      contentText: `测试瓶子-${suffix}`,
      reviewStatus: "APPROVED",
      poolStatus: "IN_POOL",
      version: 1,
      approvedAt: new Date(),
    },
  });
}

describe("database authority constraints", () => {
  beforeAll(async () => {
    assertSafeTestDatabaseUrl(databaseUrl);
    await prisma.$connect();
  });
  beforeEach(async () => {
    assertSafeTestDatabaseUrl(databaseUrl);
    await prisma.$executeRawUnsafe(`TRUNCATE TABLE "accounts" CASCADE`);
  });
  afterAll(async () => prisma.$disconnect());

  it("defines indexed refresh-token history", async () => {
    const columns = await prisma.$queryRaw<Array<{ column_name: string }>>`
      SELECT column_name FROM information_schema.columns
      WHERE table_schema = 'public' AND table_name = 'refresh_tokens'`;
    expect(columns.map(({ column_name }) => column_name)).toEqual(
      expect.arrayContaining([
        "token_hash",
        "session_id",
        "generation",
        "status",
        "used_at",
        "replaced_by_hash",
        "created_at",
        "expires_at",
      ]),
    );
    const indexes = await prisma.$queryRaw<Array<{ indexdef: string }>>`
      SELECT indexdef FROM pg_indexes WHERE schemaname = 'public' AND tablename = 'refresh_tokens'`;
    expect(
      indexes.some(
        ({ indexdef }) =>
          indexdef.includes("UNIQUE") && indexdef.includes("token_hash"),
      ),
    ).toBe(true);
    expect(
      indexes.some(
        ({ indexdef }) =>
          indexdef.includes("session_id") && indexdef.includes("generation"),
      ),
    ).toBe(true);
  });

  it("uses the database-only bottle pick candidate partial index", async () => {
    const author = await createAccount("candidate-index-author");
    await prisma.bottle.createMany({
      data: [
        ...Array.from({ length: 2_000 }, (_, index) => ({
          authorId: author.id,
          clientRequestId: `ineligible-${index}`,
          contentText: `ineligible-${index}`,
          reviewStatus: "REVIEWING" as const,
          poolStatus: "CLOSED" as const,
        })),
        ...Array.from({ length: 3 }, (_, index) => ({
          authorId: author.id,
          clientRequestId: `eligible-${index}`,
          contentText: `eligible-${index}`,
          reviewStatus: "APPROVED" as const,
          poolStatus: "IN_POOL" as const,
          approvedAt: new Date(),
        })),
      ],
    });

    const [index] = await prisma.$queryRaw<Array<{ indexdef: string }>>`
      SELECT indexdef FROM pg_indexes
      WHERE schemaname = 'public' AND tablename = 'bottles'
        AND indexname = 'bottles_pick_candidates_id_idx'`;
    expect(index?.indexdef).toMatch(
      /ON public\.bottles USING btree \(id\) WHERE .*review_status = 'APPROVED'.*pool_status = 'IN_POOL'.*active_lease_id IS NULL/,
    );

    const { plan, rows } = await prisma.$transaction(async (tx) => {
      await tx.$executeRawUnsafe("SET LOCAL enable_seqscan = off");
      const explained = await tx.$queryRawUnsafe<
        Array<{ "QUERY PLAN": Array<{ Plan: { "Index Name"?: string } }> }>
      >(`EXPLAIN (FORMAT JSON)
         SELECT id FROM bottles
         WHERE review_status = 'APPROVED'
           AND pool_status = 'IN_POOL'
           AND active_lease_id IS NULL
         ORDER BY id LIMIT 32`);
      const selected = await tx.$queryRaw<Array<{ content_text: string }>>`
        SELECT content_text FROM bottles
        WHERE review_status = 'APPROVED'
          AND pool_status = 'IN_POOL'
          AND active_lease_id IS NULL
        ORDER BY id LIMIT 32`;
      return { plan: explained[0]!["QUERY PLAN"][0]!.Plan, rows: selected };
    });
    const indexNames = (node: unknown): string[] => {
      if (!node || typeof node !== "object") return [];
      const record = node as Record<string, unknown>;
      return [
        ...(typeof record["Index Name"] === "string"
          ? [record["Index Name"]]
          : []),
        ...Object.values(record).flatMap(indexNames),
      ];
    };
    expect(indexNames(plan)).toContain("bottles_pick_candidates_id_idx");
    expect(rows.map(({ content_text }) => content_text).sort()).toEqual([
      "eligible-0",
      "eligible-1",
      "eligible-2",
    ]);
  });

  it("backfills and requires the session token version snapshot", async () => {
    const columns = await prisma.$queryRaw<
      Array<{ is_nullable: string; column_default: string | null }>
    >`
      SELECT is_nullable, column_default FROM information_schema.columns
      WHERE table_schema = 'public' AND table_name = 'sessions' AND column_name = 'token_version'`;
    expect(columns).toHaveLength(1);
    expect(columns[0]).toMatchObject({
      is_nullable: "NO",
      column_default: "0",
    });
  });

  it("expresses independent moderation and pool lifecycle state", async () => {
    const author = await createAccount("states");
    const bottle = await prisma.bottle.create({
      data: {
        authorId: author.id,
        contentText: "state",
        reviewStatus: "MANUAL_REVIEW",
        poolStatus: "LEASED",
        version: 3,
        approvedAt: new Date(),
        consumedAt: new Date(),
      },
      include: { author: { include: { anonymousProfile: true } } },
    });
    expect(bottle).toMatchObject({
      reviewStatus: "MANUAL_REVIEW",
      poolStatus: "LEASED",
      version: 3,
    });
    expect(bottle.author.anonymousProfile).toMatchObject({
      avatarColor: "#66CCFF",
      reviewStatus: "APPROVED",
    });
  });

  it("enforces unique anonymous public ids", async () => {
    const first = await createAccount("public-id");
    const publicId = (
      await prisma.anonymousProfile.findUniqueOrThrow({
        where: { accountId: first.id },
      })
    ).publicId;
    await expectUniqueViolation(
      prisma.account.create({
        data: {
          phoneCiphertext: Buffer.from("other"),
          phoneHmac: "other-public-id",
          anonymousProfile: {
            create: {
              publicId,
              nickname: "另一位",
              avatarColor: "#000000",
            },
          },
        },
      }),
    );
  });

  it("allows only one ACTIVE lease per bottle and allows ended leases", async () => {
    const author = await createAccount("lease-author");
    const firstPicker = await createAccount("lease-picker-a");
    const secondPicker = await createAccount("lease-picker-b");
    const bottle = await createBottle(author.id, "lease");
    const first = await prisma.bottlePickLease.create({
      data: {
        bottleId: bottle.id,
        pickerId: firstPicker.id,
        leaseTokenHash: "lease-a",
        leaseTokenCiphertext: Buffer.from("ciphertext-a"),
        expiresAt: new Date(Date.now() + 60_000),
      },
    });
    await expectUniqueViolation(
      prisma.bottlePickLease.create({
        data: {
          bottleId: bottle.id,
          pickerId: secondPicker.id,
          leaseTokenHash: "lease-b",
          leaseTokenCiphertext: Buffer.from("ciphertext-b"),
          expiresAt: new Date(Date.now() + 60_000),
        },
      }),
    );
    await prisma.bottlePickLease.update({
      where: { id: first.id },
      data: { status: "RETURNED", endedAt: new Date() },
    });
    await expect(
      prisma.bottlePickLease.create({
        data: {
          bottleId: bottle.id,
          pickerId: secondPicker.id,
          leaseTokenHash: "lease-c",
          leaseTokenCiphertext: Buffer.from("ciphertext-c"),
          expiresAt: new Date(Date.now() + 60_000),
        },
      }),
    ).resolves.toMatchObject({ status: "ACTIVE" });
  });

  it("supports bottle-targeted moderation tasks without a report", async () => {
    const author = await createAccount("moderation");
    const bottle = await createBottle(author.id, "moderation");
    await expect(
      prisma.moderationTask.create({
        data: {
          targetType: "BOTTLE",
          targetId: bottle.id,
          provider: "internal",
          result: { verdict: "review" },
          riskLabels: ["safety"],
          payloadHash: "payload-hash",
          status: "PENDING",
        },
      }),
    ).resolves.toMatchObject({ targetType: "BOTTLE", reportId: null });
  });

  it("stores conversation/message snapshots and bigint sequences", async () => {
    const author = await createAccount("message");
    const bottle = await createBottle(author.id, "message");
    const conversation = await prisma.conversation.create({
      data: { sourceBottleId: bottle.id, nextSeq: 2n },
    });
    const member = await prisma.conversationMember.create({
      data: {
        conversationId: conversation.id,
        accountId: author.id,
        peerAliasSnapshot: "匿名海风",
      },
    });
    const message = await prisma.message.create({
      data: {
        conversationId: conversation.id,
        senderId: author.id,
        clientMsgId: "msg",
        seq: 1n,
        contentText: "hello",
        reviewStatus: "REVIEWING",
        sentAt: new Date(),
        recalledAt: new Date(),
      },
    });
    expect(conversation.lastMessageAt).toBeInstanceOf(Date);
    expect(member).toMatchObject({
      peerAliasSnapshot: "匿名海风",
      blockedAt: null,
    });
    expect(message.seq).toBe(1n);
  });

  it("rejects duplicate message client ids within a conversation", async () => {
    const author = await createAccount("message-client-id");
    const bottle = await createBottle(author.id, "message-client-id");
    const conversation = await prisma.conversation.create({
      data: { sourceBottleId: bottle.id },
    });

    await expect(
      prisma.message.create({
        data: {
          conversationId: conversation.id,
          senderId: author.id,
          clientMsgId: "duplicate-client-id",
          seq: 1n,
          contentText: "first",
        },
      }),
    ).resolves.toMatchObject({ clientMsgId: "duplicate-client-id", seq: 1n });

    await expectUniqueViolation(
      prisma.message.create({
        data: {
          conversationId: conversation.id,
          senderId: author.id,
          clientMsgId: "duplicate-client-id",
          seq: 2n,
          contentText: "second",
        },
      }),
    );
  });

  it("rejects duplicate message sequences within a conversation", async () => {
    const author = await createAccount("message-seq");
    const bottle = await createBottle(author.id, "message-seq");
    const conversation = await prisma.conversation.create({
      data: { sourceBottleId: bottle.id },
    });

    await expect(
      prisma.message.create({
        data: {
          conversationId: conversation.id,
          senderId: author.id,
          clientMsgId: "first-client-id",
          seq: 1n,
          contentText: "first",
        },
      }),
    ).resolves.toMatchObject({ clientMsgId: "first-client-id", seq: 1n });

    await expectUniqueViolation(
      prisma.message.create({
        data: {
          conversationId: conversation.id,
          senderId: author.id,
          clientMsgId: "second-client-id",
          seq: 1n,
          contentText: "second",
        },
      }),
    );
  });

  it("rejects self-blocks", async () => {
    const account = await createAccount("self-block");
    await expectConstraintViolation(
      prisma.block.create({
        data: { blockerId: account.id, blockedId: account.id },
      }),
    );
  });

  it("rejects negative daily counters", async () => {
    const account = await createAccount("negative-usage");
    await expectConstraintViolation(
      prisma.dailyUsage.create({
        data: {
          accountId: account.id,
          usageDate: new Date(),
          messagesSent: -1,
        },
      }),
    );
  });

  it("rejects invalid conversation, member, message and outbox counters", async () => {
    const author = await createAccount("counters");
    const bottle = await createBottle(author.id, "counters");
    await expectConstraintViolation(
      prisma.conversation.create({
        data: { sourceBottleId: bottle.id, nextSeq: 0n },
      }),
    );
    const conversation = await prisma.conversation.create({
      data: { sourceBottleId: bottle.id },
    });
    await expectConstraintViolation(
      prisma.conversationMember.create({
        data: {
          conversationId: conversation.id,
          accountId: author.id,
          peerAliasSnapshot: "x",
          lastReadSeq: -1n,
        },
      }),
    );
    await expectConstraintViolation(
      prisma.message.create({
        data: {
          conversationId: conversation.id,
          senderId: author.id,
          clientMsgId: "zero",
          seq: 0n,
          contentText: "x",
        },
      }),
    );
    await expectConstraintViolation(
      prisma.outboxEvent.create({
        data: {
          aggregateType: "Bottle",
          aggregateId: bottle.id,
          eventType: "created",
          payload: {},
          attempts: -1,
        },
      }),
    );
  });

  it("requires reports to have exactly one target and stores snapshot/resolution", async () => {
    const reporter = await createAccount("reporter");
    const target = await createAccount("reported");
    const bottle = await createBottle(target.id, "report");
    await expectConstraintViolation(
      prisma.report.create({
        data: {
          reporterId: reporter.id,
          reason: "missing",
          targetSnapshot: {},
        },
      }),
    );
    await expectConstraintViolation(
      prisma.report.create({
        data: {
          reporterId: reporter.id,
          reportedAccountId: target.id,
          bottleId: bottle.id,
          reason: "many",
          targetSnapshot: {},
        },
      }),
    );
    await expect(
      prisma.report.create({
        data: {
          reporterId: reporter.id,
          bottleId: bottle.id,
          reason: "one",
          targetSnapshot: { text: "snapshot" },
          resolution: "REMOVE",
        },
      }),
    ).resolves.toMatchObject({ resolution: "REMOVE" });
  });

  it("keeps the original authority uniqueness constraints", async () => {
    const author = await createAccount("uniques-author");
    const picker = await createAccount("uniques-picker");
    const bottle = await createBottle(author.id, "uniques");
    await prisma.conversation.create({ data: { sourceBottleId: bottle.id } });
    await expectUniqueViolation(
      prisma.conversation.create({ data: { sourceBottleId: bottle.id } }),
    );
    await prisma.bottlePickHistory.create({
      data: { bottleId: bottle.id, pickerId: picker.id },
    });
    await expectUniqueViolation(
      prisma.bottlePickHistory.create({
        data: { bottleId: bottle.id, pickerId: picker.id },
      }),
    );
    await prisma.block.create({
      data: { blockerId: author.id, blockedId: picker.id },
    });
    await expectUniqueViolation(
      prisma.block.create({
        data: { blockerId: author.id, blockedId: picker.id },
      }),
    );
  });
});

describe("PrismaService lifecycle", () => {
  it("connects and disconnects through module lifecycle hooks", async () => {
    const service = new PrismaService({
      datasources: { db: { url: databaseUrl } },
    });
    await service.onModuleInit();
    await expect(service.$queryRaw`SELECT 1`).resolves.toBeDefined();
    await service.onModuleDestroy();
  });
});