import { getPayload, Payload } from "payload";
import config from "@/payload.config";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { hashPayload, processOperationEvent, stableStringify } from "@/lib/operations/process";
import type { RawSyncEvent } from "@/lib/operations/types";

type JsonValue = string | number | boolean | unknown[] | { [k: string]: unknown } | null;

let payload: Payload;
const RUN = `op-${Date.now().toString(36)}`;

describe("Operation ledger", () => {
  let userId: number;
  let profileId: number;
  let serverId: number;
  const createdSyncEventIds: number[] = [];
  const createdEventIds: number[] = [];
  const createdEffectIds: number[] = [];

  beforeAll(async () => {
    const payloadConfig = await config;
    payload = await getPayload({ config: payloadConfig });

    const user = await payload.create({
      collection: "users",
      data: {
        username: `${RUN}-op`,
        discordUsername: `${RUN}-op-discord`,
        displayName: `${RUN} Operator`,
        steamId: `${RUN}-steam-001`,
        password: "Test1234",
      },
      overrideAccess: true,
      depth: 0,
    });
    userId = user.id;

    const profiles = await payload.find({
      collection: "profiles",
      where: { user: { equals: userId } },
      limit: 1,
      depth: 0,
      overrideAccess: true,
    });
    profileId = profiles.docs[0].id;

    const server = await payload.create({
      collection: "game-servers",
      data: {
        serverId: `${RUN}-srv`,
        name: `${RUN} Server`,
        status: "online",
      },
      overrideAccess: true,
      depth: 0,
    });
    serverId = server.id;
  });

  afterAll(async () => {
    for (const id of createdEffectIds) {
      await payload.delete({ collection: "operation-effects", id, overrideAccess: true }).catch(() => {});
    }
    for (const id of createdEventIds) {
      await payload.delete({ collection: "operation-events", id, overrideAccess: true }).catch(() => {});
    }
    for (const id of createdSyncEventIds) {
      await payload.delete({ collection: "arma-sync-events", id, overrideAccess: true }).catch(() => {});
    }
    if (profileId) {
      await payload.delete({ collection: "profiles", id: profileId, overrideAccess: true }).catch(() => {});
    }
    if (userId) {
      await payload.delete({ collection: "users", id: userId, overrideAccess: true }).catch(() => {});
    }
    if (serverId) {
      await payload.delete({ collection: "game-servers", id: serverId, overrideAccess: true }).catch(() => {});
    }
  });

  async function createRawEvent(opts: {
    eventId: string;
    type: string;
    payload: JsonValue;
  }): Promise<RawSyncEvent> {
    const occurredAt = new Date().toISOString();
    const syncDoc = await payload.create({
      collection: "arma-sync-events",
      data: {
        eventId: opts.eventId,
        server: serverId,
        type: opts.type,
        occurredAt,
        payload: opts.payload,
      },
      overrideAccess: true,
      depth: 0,
    });
    createdSyncEventIds.push(syncDoc.id);
    return {
      id: syncDoc.id,
      eventId: syncDoc.eventId,
      server: serverId,
      type: syncDoc.type,
      occurredAt,
      payload: syncDoc.payload,
    };
  }

  describe("stableStringify", () => {
    it("produces stable output regardless of key order", () => {
      expect(stableStringify({ b: 1, a: 2 })).toBe(stableStringify({ a: 2, b: 1 }));
      expect(stableStringify([{ b: 1, a: 2 }])).toBe(stableStringify([{ a: 2, b: 1 }]));
      expect(stableStringify([{ b: 1 }, { a: 2 }])).not.toBe(stableStringify([{ a: 2 }, { b: 1 }]));
    });
  });

  describe("processOperationEvent", () => {
    it("records a validated operation.start and derives an operation.started effect", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-start`,
        type: "operation.start",
        payload: { operationId: RUN, version: 1 },
      });

      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      const event = events.docs[0];
      expect(event.status).toBe("validated");
      expect(event.operationId).toBe(RUN);
      expect(event.type).toBe("operation.start");
      expect(event.version).toBe(1);
      expect(event.sourceEvent).toBe(raw.id);
      expect(event.payloadHash).toBe(hashPayload(raw.payload));
      createdEventIds.push(event.id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: event.id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(1);
      const effect = effects.docs[0];
      expect(effect.effectType).toBe("operation.started");
      expect(effect.status).toBe("applied");
      expect(effect.sourceEvent).toBe(raw.id);
      expect(effect.operationId).toBe(RUN);
      createdEffectIds.push(effect.id);
    });

    it("is idempotent for a duplicate raw event", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-dup`,
        type: "operation.end",
        payload: { operationId: RUN, version: 1 },
      });

      await processOperationEvent(payload, raw);
      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      createdEventIds.push(events.docs[0].id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: events.docs[0].id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(1);
      createdEffectIds.push(effects.docs[0].id);
    });

    it("retains an unsupported-version event with zero effects", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-v2`,
        type: "operation.start",
        payload: { operationId: RUN, version: 2 },
      });

      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      const event = events.docs[0];
      expect(event.status).toBe("rejected");
      expect(event.version).toBe(2);
      expect(event.error).toMatchObject({ code: "unsupported-version" });
      createdEventIds.push(event.id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: event.id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(0);
    });

    it("records player.kill as validated with zero effects", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-kill`,
        type: "player.kill",
        payload: [
          "Victim", "", `${RUN} Killer`, `${RUN}-steam-001`,
          `${RUN} Killer`, `${RUN}-steam-001`, "O_T_Soldier_AT_F", "B_Officer_Parade_Veteran_F",
        ],
      });

      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      expect(events.docs[0].status).toBe("validated");
      expect(events.docs[0].operationId).toBe("unknown");
      createdEventIds.push(events.docs[0].id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: events.docs[0].id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(0);
    });

    it("rejects a malformed payload with zero effects", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-bad`,
        type: "operation.start",
        payload: [],
      });

      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      expect(events.docs[0].status).toBe("rejected");
      expect(events.docs[0].error).toMatchObject({ code: "invalid-payload" });
      createdEventIds.push(events.docs[0].id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: events.docs[0].id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(0);
    });

    it("dead-letters an unknown type with zero effects", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-unknown`,
        type: "some.unknown.type",
        payload: { anything: true },
      });

      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      expect(events.docs[0].status).toBe("dead-letter");
      expect(events.docs[0].type).toBe("some.unknown.type");
      expect(events.docs[0].error).toMatchObject({ code: "unsupported-type" });
      createdEventIds.push(events.docs[0].id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: events.docs[0].id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(0);
    });

    it("links actor from the payload", async () => {
      const raw = await createRawEvent({
        eventId: `${RUN}-evt-extract`,
        type: "operation.extraction",
        payload: { operationId: RUN, version: 1, actorId: userId, player: `${RUN} Operator` },
      });

      await processOperationEvent(payload, raw);

      const events = await payload.find({
        collection: "operation-events",
        where: { eventId: { equals: raw.eventId } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      expect(events.docs[0].actor).toBe(userId);
      createdEventIds.push(events.docs[0].id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: events.docs[0].id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(1);
      expect(effects.docs[0].effectType).toBe("operation.extraction-recorded");
      createdEffectIds.push(effects.docs[0].id);
    });
  });

  describe("end-to-end via arma-sync-events create", () => {
    it("consumes a real sync event through the afterChange hook", async () => {
      const syncEvent = await payload.create({
        collection: "arma-sync-events",
        data: {
          eventId: `${RUN}-real-1`,
          server: serverId,
          type: "operation.start",
          occurredAt: new Date().toISOString(),
          payload: { operationId: RUN, version: 1 },
        },
        overrideAccess: true,
        depth: 0,
      });
      createdSyncEventIds.push(syncEvent.id);

      const events = await payload.find({
        collection: "operation-events",
        where: { sourceEvent: { equals: syncEvent.id } },
        limit: 1,
        depth: 0,
        overrideAccess: true,
      });
      expect(events.docs).toHaveLength(1);
      const event = events.docs[0];
      expect(event.status).toBe("validated");
      expect(event.operationId).toBe(RUN);
      expect(event.eventId).toBe(`${RUN}-real-1`);
      createdEventIds.push(event.id);

      const effects = await payload.find({
        collection: "operation-effects",
        where: { operationEvent: { equals: event.id } },
        limit: 10,
        depth: 0,
        overrideAccess: true,
      });
      expect(effects.docs).toHaveLength(1);
      const effect = effects.docs[0];
      expect(effect.effectType).toBe("operation.started");
      expect(effect.sourceEvent).toBe(syncEvent.id);
      expect(effect.operationEvent).toBe(event.id);
      createdEffectIds.push(effect.id);
    });
  });
});