import { describe, expect, it } from "@suaveplan/testing/runner";
import * as fc from "fast-check";
import {
    createEmptyContainer,
    decryptContainer,
    encryptContainer,
} from "../src/container/container.js";
import {
    decryptField,
    encryptField,
} from "../src/encryption/field-encryption.js";
import { VAULT_CODES } from "../src/errors/codes.js";
import { VaultError } from "../src/errors/vault-error.js";
import {
    createManifest,
    packManifest,
    unpackManifest,
} from "../src/manifest/manifest.js";
import type {
    DriveLike,
    DriveSharingLike,
    SyncDelegationResult,
    SyncSnapshot,
    VaultSyncLike,
} from "../src/types/adapters.js";
import type { VaultConfig } from "../src/types/types.js";
import { Vault } from "../src/vault/vault.js";

function vaultKey(): Uint8Array {
    const key = new Uint8Array(32);
    crypto.getRandomValues(key);
    return key;
}

function memoryDrive(): DriveLike & { blobs: Map<string, Uint8Array> } {
    const blobs = new Map<string, Uint8Array>();
    return {
        blobs,
        async read(path) {
            const v = blobs.get(path);
            if (v === undefined) throw new Error(`missing ${path}`);
            return v;
        },
        async write(path, data) {
            blobs.set(path, new Uint8Array(data));
        },
        async delete(path) {
            return blobs.delete(path);
        },
        async exists(path) {
            return blobs.has(path);
        },
    };
}

function noopSharing(): DriveSharingLike {
    return {
        async createLink() {
            return { id: "x", url: "https://x.example/x" };
        },
        async revokeLink() {},
        async isActive() {
            return true;
        },
    };
}

function noopSync(): VaultSyncLike {
    let last: SyncSnapshot = { items: [], snapshotAt: 0 };
    return {
        hydrate(s) {
            last = s;
        },
        async pull(): Promise<SyncDelegationResult> {
            return { merged: [], conflicts: [], deleted: [], durationMs: 0 };
        },
        async push(): Promise<SyncDelegationResult> {
            return { merged: [], conflicts: [], deleted: [], durationMs: 0 };
        },
        async sync(): Promise<SyncDelegationResult> {
            return { merged: [], conflicts: [], deleted: [], durationMs: 0 };
        },
        currentSnapshot() {
            return last;
        },
    };
}

function makeConfig(): VaultConfig {
    return {
        vaultId: "personal",
        email: "u@example.com",
        containerPath: "/v.bin",
        attachmentsPrefix: "/att",
        argon2id: {
            memoryKB: 65536,
            iterations: 3,
            parallelism: 1,
            outputLength: 32,
        },
        argon2idSalt: new Uint8Array(16),
        drive: memoryDrive(),
        driveSharing: noopSharing(),
        sync: noopSync(),
    };
}

describe("vault — property tests", () => {
    it("encryptField + decryptField round-trip preserves arbitrary plaintexts", {
        timeout: 30000,
    }, () => {
        const key = vaultKey();
        fc.assert(
            fc.property(fc.string({ maxLength: 256 }), (value) => {
                const envelope = encryptField({
                    vaultKey: key,
                    itemId: "i1",
                    fieldName: "f",
                    value,
                });
                const recovered = decryptField({
                    vaultKey: key,
                    itemId: "i1",
                    fieldName: "f",
                    envelope,
                });
                return recovered === value;
            }),
            { numRuns: 50 }
        );
    });

    it("manifest pack/unpack round-trips for arbitrary parameter combinations", {
        timeout: 30000,
    }, () => {
        fc.assert(
            fc.property(
                fc.integer({ min: 1, max: 0xff_ff_ff_ff }),
                fc.integer({ min: 1, max: 0xff_ff }),
                fc.integer({ min: 1, max: 0xff }),
                fc.integer({ min: 0, max: 0xff_ff }),
                (memoryKB, iterations, parallelism, schemaVersion) => {
                    const m = createManifest({
                        vaultId: "v",
                        argon2idMemoryKB: memoryKB,
                        argon2idIterations: iterations,
                        argon2idParallelism: parallelism,
                        schemaVersion,
                        now: 1_700_000_000_000,
                    });
                    const packed = packManifest(m);
                    const round = unpackManifest(packed);
                    return (
                        round.argon2idMemoryKB === memoryKB &&
                        round.argon2idIterations === iterations &&
                        round.argon2idParallelism === parallelism &&
                        round.schemaVersion === schemaVersion
                    );
                }
            ),
            { numRuns: 30 }
        );
    });

    it("container encrypt + decrypt round-trips arbitrary item ids", {
        timeout: 30000,
    }, () => {
        const key = vaultKey();
        fc.assert(
            fc.property(
                fc.string({ minLength: 1, maxLength: 32 }),
                fc.string({ maxLength: 64 }),
                (id, title) => {
                    const { manifest, state } = createEmptyContainer({
                        vaultId: "v",
                        argon2idMemoryKB: 65536,
                        argon2idIterations: 3,
                        argon2idParallelism: 4,
                        now: 1,
                    });
                    state.items.set(id, {
                        id,
                        createdAt: 1,
                        updatedAt: 1,
                        version: 1,
                        deleted: false,
                        title,
                        category: "x",
                        fieldsJson: "{}",
                        concealedFieldsJson: "{}",
                        tagsJson: "[]",
                        favorite: false,
                    });
                    const blob = encryptContainer({
                        manifest,
                        state,
                        vaultKey: key,
                    });
                    const round = decryptContainer(blob, key);
                    return round.state.items.get(id)?.title === title;
                }
            ),
            { numRuns: 20 }
        );
    });

    it("lock is idempotent across repeat calls", {
        timeout: 30000,
    }, async () => {
        const vault = Vault.open(makeConfig());
        await vault.lock();
        await vault.lock();
        await vault.lock();
        expect(vault.isLocked).toBe(true);
    });

    it("every CRUD method on a locked vault throws VAULT.LOCKED", {
        timeout: 30000,
    }, () => {
        const vault = Vault.open(makeConfig());
        const ops: Array<() => unknown> = [
            () => vault.items,
            () => vault.search,
            () => vault.attachments,
            () => vault.shares,
            () => vault.sync,
            () => vault.currentManifest(),
        ];
        for (const fn of ops) {
            let captured: unknown = null;
            try {
                fn();
            } catch (err) {
                captured = err;
            }
            expect(VaultError.is(captured)).toBe(true);
            expect((captured as VaultError).code).toBe(VAULT_CODES.LOCKED);
        }
    });
});