/**
 * Boundary schema tests for SignalingMessageSchema and its variants.
 *
 * Asserts (a) every variant parses, (b) malformed payloads are
 * rejected, (c) unknown discriminators are rejected.
 */

import { describe, expect, it } from "@suaveplan/testing/runner";
import {
    AnnounceChunksMessageSchema,
    AnswerMessageSchema,
    ChunkBroadcastRequestSchema,
    ChunkBroadcastResponseSchema,
    ChunkDataMessageSchema,
    ChunkDataPartMessageSchema,
    ChunkQueryMessageSchema,
    ChunkQueryResponseSchema,
    ChunkRequestMessageSchema,
    ChunksUpdatedMessageSchema,
    DataChannelChunkRequestSchema,
    IceCandidateMessageSchema,
    OfferMessageSchema,
    PeerJoinedMessageSchema,
    PeerLeftMessageSchema,
    RegisteredMessageSchema,
    RegisterMessageSchema,
    SignalingMessageSchema,
} from "../src/index.js";

const validVariants: Array<{ name: string; value: unknown }> = [
    {
        name: "offer",
        value: {
            type: "offer",
            from: "a",
            to: "b",
            payload: { type: "offer", sdp: "v=0" },
        },
    },
    {
        name: "answer",
        value: {
            type: "answer",
            payload: { type: "answer", sdp: "v=0" },
        },
    },
    {
        name: "ice-candidate",
        value: {
            type: "ice-candidate",
            payload: { candidate: "candidate:1 1 UDP 1 1.1.1.1 1 typ host" },
        },
    },
    {
        name: "register",
        value: {
            type: "register",
            payload: {
                peerId: "p1",
                peerName: "Alice",
                authToken: "tok",
                chunks: ["1:0", "1:1"],
            },
        },
    },
    {
        name: "registered",
        value: {
            type: "registered",
            payload: {
                peerId: "p1",
                peers: [{ id: "p2", name: "Bob", chunks: ["2:0"] }],
            },
        },
    },
    {
        name: "peer-joined",
        value: {
            type: "peer-joined",
            payload: { id: "p3", name: "Carol", chunks: [] },
        },
    },
    {
        name: "peer-left",
        value: { type: "peer-left", payload: { peerId: "p3" } },
    },
    {
        name: "announce-chunks",
        value: {
            type: "announce-chunks",
            payload: { chunks: ["1:0", "1:1"] },
        },
    },
    {
        name: "peer-chunks-updated",
        value: {
            type: "peer-chunks-updated",
            payload: { peerId: "p1", chunks: ["1:0"] },
        },
    },
    {
        name: "request-chunk (signaling)",
        value: {
            type: "request-chunk",
            payload: { requestId: "r1", fileId: "1", chunkId: "2" },
        },
    },
    {
        name: "chunk-data",
        value: {
            type: "chunk-data",
            payload: {
                requestId: "r1",
                fileId: "1",
                chunkId: "2",
                data: "AAAA",
            },
        },
    },
    {
        name: "chunk-data-part",
        value: {
            type: "chunk-data-part",
            requestId: "r1",
            partIndex: 0,
            totalParts: 4,
            data: "AAAA",
        },
    },
    {
        name: "request-chunk (data channel)",
        value: {
            type: "request-chunk",
            requestId: "r1",
            fileId: "1",
            chunkId: "2",
        },
    },
    {
        name: "chunk-query",
        value: {
            type: "chunk-query",
            requestId: "r1",
            fileId: "1",
            chunkIds: ["0", "1"],
        },
    },
    {
        name: "chunk-query-response",
        value: {
            type: "chunk-query-response",
            requestId: "r1",
            fileId: "1",
            availableChunkIds: ["0", "1"],
        },
    },
    {
        name: "chunk-broadcast-request",
        value: {
            type: "chunk-broadcast-request",
            requestId: "r1",
            fileId: "1",
            neededChunkIds: ["0", "1"],
        },
    },
    {
        name: "chunk-broadcast-response",
        value: {
            type: "chunk-broadcast-response",
            requestId: "r1",
            fileId: "1",
            peerId: "p1",
            availableChunkIds: ["0", "1"],
        },
    },
];

describe("SignalingMessageSchema (union)", () => {
    for (const { name, value } of validVariants) {
        it(`accepts the ${name} variant`, { timeout: 5000 }, () => {
            const r = SignalingMessageSchema.safeParse(value);
            expect(r.success).toBe(true);
        });
    }

    it("rejects unknown discriminator", { timeout: 5000 }, () => {
        const r = SignalingMessageSchema.safeParse({
            type: "totally-unknown",
            payload: {},
        });
        expect(r.success).toBe(false);
    });

    it("rejects fileId that is not a decimal string", { timeout: 5000 }, () => {
        const r = SignalingMessageSchema.safeParse({
            type: "chunk-query",
            requestId: "r1",
            fileId: "0xff",
            chunkIds: ["0"],
        });
        expect(r.success).toBe(false);
    });

    it("rejects negative partIndex on chunk-data-part", {
        timeout: 5000,
    }, () => {
        const r = SignalingMessageSchema.safeParse({
            type: "chunk-data-part",
            requestId: "r1",
            partIndex: -1,
            totalParts: 4,
            data: "AA",
        });
        expect(r.success).toBe(false);
    });

    it("rejects zero totalParts on chunk-data-part", { timeout: 5000 }, () => {
        const r = SignalingMessageSchema.safeParse({
            type: "chunk-data-part",
            requestId: "r1",
            partIndex: 0,
            totalParts: 0,
            data: "AA",
        });
        expect(r.success).toBe(false);
    });

    it("rejects empty requestId", { timeout: 5000 }, () => {
        const r = SignalingMessageSchema.safeParse({
            type: "request-chunk",
            requestId: "",
            fileId: "1",
            chunkId: "0",
        });
        expect(r.success).toBe(false);
    });
});

describe("per-variant schemas", () => {
    it("OfferMessageSchema rejects an answer", { timeout: 5000 }, () => {
        expect(
            OfferMessageSchema.safeParse({
                type: "answer",
                payload: { type: "answer" },
            }).success
        ).toBe(false);
    });

    it("AnswerMessageSchema rejects missing payload", { timeout: 5000 }, () => {
        expect(AnswerMessageSchema.safeParse({ type: "answer" }).success).toBe(
            false
        );
    });

    it("IceCandidateMessageSchema accepts minimum payload", {
        timeout: 5000,
    }, () => {
        expect(
            IceCandidateMessageSchema.safeParse({
                type: "ice-candidate",
                payload: {},
            }).success
        ).toBe(true);
    });

    it("RegisterMessageSchema requires peerId", { timeout: 5000 }, () => {
        expect(
            RegisterMessageSchema.safeParse({
                type: "register",
                payload: { peerName: "n", chunks: [] },
            }).success
        ).toBe(false);
    });

    it("RegisteredMessageSchema requires peers array", {
        timeout: 5000,
    }, () => {
        expect(
            RegisteredMessageSchema.safeParse({
                type: "registered",
                payload: { peerId: "p1" },
            }).success
        ).toBe(false);
    });

    it("PeerJoinedMessageSchema requires id", { timeout: 5000 }, () => {
        expect(
            PeerJoinedMessageSchema.safeParse({
                type: "peer-joined",
                payload: { name: "n", chunks: [] },
            }).success
        ).toBe(false);
    });

    it("PeerLeftMessageSchema rejects missing peerId", {
        timeout: 5000,
    }, () => {
        expect(
            PeerLeftMessageSchema.safeParse({
                type: "peer-left",
                payload: {},
            }).success
        ).toBe(false);
    });

    it("AnnounceChunksMessageSchema accepts empty chunks array", {
        timeout: 5000,
    }, () => {
        expect(
            AnnounceChunksMessageSchema.safeParse({
                type: "announce-chunks",
                payload: { chunks: [] },
            }).success
        ).toBe(true);
    });

    it("ChunksUpdatedMessageSchema rejects empty peerId", {
        timeout: 5000,
    }, () => {
        expect(
            ChunksUpdatedMessageSchema.safeParse({
                type: "peer-chunks-updated",
                payload: { peerId: "", chunks: [] },
            }).success
        ).toBe(false);
    });

    it("ChunkRequestMessageSchema rejects empty data base64", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkDataMessageSchema.safeParse({
                type: "chunk-data",
                payload: {
                    requestId: "r",
                    fileId: "1",
                    chunkId: "0",
                    data: "",
                },
            }).success
        ).toBe(false);
    });

    it("ChunkRequestMessageSchema requires nested payload", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkRequestMessageSchema.safeParse({
                type: "request-chunk",
                requestId: "r",
                fileId: "1",
                chunkId: "0",
            }).success
        ).toBe(false);
    });

    it("DataChannelChunkRequestSchema requires flat fields", {
        timeout: 5000,
    }, () => {
        expect(
            DataChannelChunkRequestSchema.safeParse({
                type: "request-chunk",
                payload: { requestId: "r", fileId: "1", chunkId: "0" },
            }).success
        ).toBe(false);
    });

    it("ChunkDataPartMessageSchema rejects float partIndex", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkDataPartMessageSchema.safeParse({
                type: "chunk-data-part",
                requestId: "r",
                partIndex: 0.5,
                totalParts: 4,
                data: "x",
            }).success
        ).toBe(false);
    });

    it("ChunkQueryMessageSchema accepts missing chunkIds", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkQueryMessageSchema.safeParse({
                type: "chunk-query",
                requestId: "r",
                fileId: "1",
            }).success
        ).toBe(true);
    });

    it("ChunkQueryResponseSchema requires availableChunkIds", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkQueryResponseSchema.safeParse({
                type: "chunk-query-response",
                requestId: "r",
                fileId: "1",
            }).success
        ).toBe(false);
    });

    it("ChunkBroadcastRequestSchema requires neededChunkIds", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkBroadcastRequestSchema.safeParse({
                type: "chunk-broadcast-request",
                requestId: "r",
                fileId: "1",
            }).success
        ).toBe(false);
    });

    it("ChunkBroadcastResponseSchema requires peerId", {
        timeout: 5000,
    }, () => {
        expect(
            ChunkBroadcastResponseSchema.safeParse({
                type: "chunk-broadcast-response",
                requestId: "r",
                fileId: "1",
                availableChunkIds: [],
            }).success
        ).toBe(false);
    });
});