import { InMemoryDeliveryEventStore } from "@suaveplan/delivery-tracking";
import { describe, expect, it } from "@suaveplan/testing/runner";
import { Hono } from "hono";
import {
    CAMPAIGNS_API_CODES,
    CampaignsApiError,
} from "../../error-codes/error-codes.js";
import { InMemoryCampaignSuppressionStore } from "../../repositories/suppression/suppression-memory.js";
import { buildDeliveryWebhookRoute, buildUnsubscribeRoute } from "./routes.js";
import "../../context/context.js";

function makeFixtures(principal: object | null = { id: "u", tenantId: "t" }) {
    let nextId = 0;
    const store = new InMemoryCampaignSuppressionStore({
        clock: () => 1_700_000_000_000,
        idGenerator: () => `s${++nextId}`,
    });
    const eventStore = new InMemoryDeliveryEventStore();
    const app = new Hono();
    app.use("*", async (c, next) => {
        if (principal !== null) c.set("user", principal as never);
        c.set("campaignSuppressionStore", store);
        c.set("deliveryEventStore", eventStore);
        c.set("eventBus", { emit: () => undefined } as never);
        await next();
    });
    app.onError((err, c) => {
        if (err instanceof CampaignsApiError) {
            const status = ((err.context as { statusCode?: number } | undefined)
                ?.statusCode ?? 500) as 400 | 401 | 500;
            return c.json({ code: err.code, error: err.message }, status);
        }
        return c.json({ error: String(err) }, 500);
    });
    for (const e of [buildDeliveryWebhookRoute(), buildUnsubscribeRoute()]) {
        const method = e.route.method as "get" | "post";
        app[method](e.route.path, (c) => e.handler(c as never));
    }
    return { app, store, eventStore };
}

describe("webhook delivery route", () => {
    it("records a delivered event without suppression", {
        timeout: 5000,
    }, async () => {
        const { app, store, eventStore } = makeFixtures();
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m1",
                eventType: "delivered",
                contactId: "u1",
                campaignId: "cmp1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect(res.status).toBe(200);
        const body = await res.json();
        expect(body.data.suppressed).toBe(false);
        expect(await eventStore.getByCampaign("cmp1")).toHaveLength(1);
        expect(await store.count("t")).toBe(0);
    });

    it("suppresses on unsubscribed event", { timeout: 5000 }, async () => {
        const { app, store } = makeFixtures();
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m1",
                eventType: "unsubscribed",
                contactId: "u1",
                campaignId: "cmp1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect(res.status).toBe(200);
        const body = await res.json();
        expect(body.data.suppressed).toBe(true);
        expect(await store.count("t")).toBe(1);
    });

    it("suppresses on bounced event", { timeout: 5000 }, async () => {
        const { app, store } = makeFixtures();
        await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m1",
                eventType: "bounced",
                contactId: "u1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect(await store.count("t")).toBe(1);
    });

    it("suppresses on complained event", { timeout: 5000 }, async () => {
        const { app, store } = makeFixtures();
        await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m1",
                eventType: "complained",
                contactId: "u1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect(await store.count("t")).toBe(1);
    });

    it("is idempotent — second unsubscribe does not raise", {
        timeout: 5000,
    }, async () => {
        const { app, store } = makeFixtures();
        for (let i = 0; i < 2; i++) {
            const res = await app.request("/webhooks/delivery", {
                method: "POST",
                body: JSON.stringify({
                    messageId: `m${i}`,
                    eventType: "unsubscribed",
                    contactId: "u1",
                }),
                headers: { "content-type": "application/json" },
            });
            expect(res.status).toBe(200);
            expect((await res.json()).data.suppressed).toBe(true);
        }
        expect(await store.count("t")).toBe(1);
    });

    it("accepts a timestamp from the payload", {
        timeout: 5000,
    }, async () => {
        const { app, eventStore } = makeFixtures();
        await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m1",
                eventType: "delivered",
                contactId: "u1",
                campaignId: "cmp1",
                timestamp: "2026-01-01T00:00:00Z",
            }),
            headers: { "content-type": "application/json" },
        });
        const events = await eventStore.getByCampaign("cmp1");
        expect(events[0]?.timestamp.toISOString()).toBe(
            "2026-01-01T00:00:00.000Z"
        );
    });

    it("rejects malformed body with WEBHOOK_REJECTED", {
        timeout: 5000,
    }, async () => {
        const { app } = makeFixtures();
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({ messageId: "", eventType: "delivered" }),
            headers: { "content-type": "application/json" },
        });
        expect(res.status).toBe(400);
        expect((await res.json()).code).toBe(
            CAMPAIGNS_API_CODES.WEBHOOK_REJECTED
        );
    });

    it("401 without a principal", { timeout: 5000 }, async () => {
        const { app } = makeFixtures(null);
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m1",
                eventType: "delivered",
                contactId: "u1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect(res.status).toBe(401);
    });

    it("POST /webhooks/delivery 400 on malformed JSON body", {
        timeout: 5000,
    }, async () => {
        const { app } = makeFixtures();
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: "not-json{",
            headers: { "content-type": "application/json" },
        });
        expect(res.status).toBe(400);
    });

    it("500 when event store slot empty", { timeout: 5000 }, async () => {
        const app = new Hono();
        app.use("*", async (c, next) => {
            c.set("user", { id: "u", tenantId: "t" } as never);
            await next();
        });
        app.onError((err, c) =>
            c.json({ code: (err as CampaignsApiError).code }, 500)
        );
        const e = buildDeliveryWebhookRoute();
        app.post(e.route.path, (c) => e.handler(c as never));
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m",
                eventType: "delivered",
                contactId: "u1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect((await res.json()).code).toBe(
            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
        );
    });

    it("500 when suppression store slot empty", {
        timeout: 5000,
    }, async () => {
        const eventStore = new InMemoryDeliveryEventStore();
        const app = new Hono();
        app.use("*", async (c, next) => {
            c.set("user", { id: "u", tenantId: "t" } as never);
            c.set("deliveryEventStore", eventStore);
            await next();
        });
        app.onError((err, c) =>
            c.json({ code: (err as CampaignsApiError).code }, 500)
        );
        const e = buildDeliveryWebhookRoute();
        app.post(e.route.path, (c) => e.handler(c as never));
        const res = await app.request("/webhooks/delivery", {
            method: "POST",
            body: JSON.stringify({
                messageId: "m",
                eventType: "delivered",
                contactId: "u1",
            }),
            headers: { "content-type": "application/json" },
        });
        expect((await res.json()).code).toBe(
            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
        );
    });
});

describe("webhook unsubscribe route", () => {
    it("accepts a valid token", { timeout: 5000 }, async () => {
        const { app, store } = makeFixtures();
        const token = btoa(JSON.stringify({ contactId: "u1" }));
        const res = await app.request(`/webhooks/unsubscribe/${token}`);
        expect(res.status).toBe(200);
        const body = await res.json();
        expect(body.data.contactId).toBe("u1");
        expect(body.data.campaignId).toBeNull();
        expect(await store.count("t")).toBe(1);
    });

    it("includes campaignId metadata when supplied", {
        timeout: 5000,
    }, async () => {
        const { app, store } = makeFixtures();
        const token = btoa(
            JSON.stringify({ contactId: "u1", campaignId: "cmp1" })
        );
        const res = await app.request(`/webhooks/unsubscribe/${token}`);
        expect(res.status).toBe(200);
        const entries = await store.list({ tenantId: "t" });
        expect(entries[0]?.metadata).toEqual({ campaignId: "cmp1" });
    });

    it("is idempotent — repeat call does not double-insert", {
        timeout: 5000,
    }, async () => {
        const { app, store } = makeFixtures();
        const token = btoa(JSON.stringify({ contactId: "u1" }));
        await app.request(`/webhooks/unsubscribe/${token}`);
        await app.request(`/webhooks/unsubscribe/${token}`);
        expect(await store.count("t")).toBe(1);
    });

    it("rejects an undecodable token", { timeout: 5000 }, async () => {
        const { app } = makeFixtures();
        const res = await app.request("/webhooks/unsubscribe/ÿÿÿÿ");
        expect(res.status).toBe(400);
        expect((await res.json()).code).toBe(
            CAMPAIGNS_API_CODES.INVALID_UNSUBSCRIBE_TOKEN
        );
    });

    it("rejects a token without contactId", { timeout: 5000 }, async () => {
        const { app } = makeFixtures();
        const token = btoa(JSON.stringify({ campaignId: "cmp1" }));
        const res = await app.request(`/webhooks/unsubscribe/${token}`);
        expect(res.status).toBe(400);
    });

    it("401 without a principal", { timeout: 5000 }, async () => {
        const { app } = makeFixtures(null);
        const token = btoa(JSON.stringify({ contactId: "u1" }));
        const res = await app.request(`/webhooks/unsubscribe/${token}`);
        expect(res.status).toBe(401);
    });

    it("500 when suppression store slot empty", {
        timeout: 5000,
    }, async () => {
        const app = new Hono();
        app.use("*", async (c, next) => {
            c.set("user", { id: "u", tenantId: "t" } as never);
            await next();
        });
        app.onError((err, c) =>
            c.json({ code: (err as CampaignsApiError).code }, 500)
        );
        const e = buildUnsubscribeRoute();
        app.get(e.route.path, (c) => e.handler(c as never));
        const token = btoa(JSON.stringify({ contactId: "u1" }));
        const res = await app.request(`/webhooks/unsubscribe/${token}`);
        expect((await res.json()).code).toBe(
            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
        );
    });
});