import type {
    Principal,
    PrincipalId,
    Scope,
} from "@suaveplan/api-types/principal";
import type { TenantId } from "@suaveplan/api-types/tenant";
import { describe, expect, it } from "@suaveplan/testing/runner";
import {
    JwtTenantResolverError,
    TENANT_RESOLVER_JWT_CODES,
} from "../error-codes/error-codes.js";
import { createJwtTenantResolver } from "./resolver.js";

function principalWith(overrides: Partial<Principal> = {}): Principal {
    return {
        id: "u_1" as PrincipalId,
        scopes: [] as readonly Scope[],
        claims: {},
        ...overrides,
    };
}

function reqWith(principal: Principal | null): Request {
    const req = new Request("https://example.com/x");
    Object.defineProperty(req, "principal", {
        value: principal,
        enumerable: true,
    });
    return req;
}

describe("createJwtTenantResolver", () => {
    it("returns TenantContext when principal carries tenantId", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver();
        const req = reqWith(principalWith({ tenantId: "acme" as TenantId }));
        const ctx = await resolver.resolve(req);
        expect(ctx).toEqual({ id: "acme", slug: "acme" });
    });

    it("returns null when principal lacks tenantId (advance chain)", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver();
        const req = reqWith(principalWith());
        const ctx = await resolver.resolve(req);
        expect(ctx).toBeNull();
    });

    it("returns null when principal is absent (advance chain)", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver();
        const req = reqWith(null);
        const ctx = await resolver.resolve(req);
        expect(ctx).toBeNull();
    });

    it("returns null when default extractor cannot find principal property", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver();
        const req = new Request("https://example.com/y");
        const ctx = await resolver.resolve(req);
        expect(ctx).toBeNull();
    });

    it("reads a custom claimKey from Principal.claims", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver({ claimKey: "tid" });
        const req = reqWith(principalWith({ claims: { tid: "acme" } }));
        const ctx = await resolver.resolve(req);
        expect(ctx).toEqual({ id: "acme", slug: "acme" });
    });

    it("treats empty-string claim as absent", { timeout: 5000 }, async () => {
        const resolver = createJwtTenantResolver({ claimKey: "tid" });
        const req = reqWith(principalWith({ claims: { tid: "" } }));
        expect(await resolver.resolve(req)).toBeNull();
    });

    it("treats non-string claim as absent", { timeout: 5000 }, async () => {
        const resolver = createJwtTenantResolver({ claimKey: "tid" });
        const req = reqWith(principalWith({ claims: { tid: 42 } }));
        expect(await resolver.resolve(req)).toBeNull();
    });

    it("requirePrincipal=true throws when principal is null", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver({ requirePrincipal: true });
        const req = reqWith(null);
        await expect(resolver.resolve(req)).rejects.toBeInstanceOf(
            JwtTenantResolverError
        );
        await resolver
            .resolve(
                reqWith(
                    principalWith({
                        tenantId: "ok" as TenantId,
                    })
                )
            )
            .then((ctx) => expect(ctx).toEqual({ id: "ok", slug: "ok" }));
    });

    it("requirePrincipal=true throws when claim is missing", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver({
            requirePrincipal: true,
            claimKey: "tid",
        });
        const req = reqWith(principalWith({ claims: {} }));
        let thrown: unknown;
        try {
            await resolver.resolve(req);
        } catch (e) {
            thrown = e;
        }
        expect(thrown).toBeInstanceOf(JwtTenantResolverError);
        expect((thrown as JwtTenantResolverError).code).toBe(
            TENANT_RESOLVER_JWT_CODES.PRINCIPAL_MISSING_TENANT_ID
        );
    });

    it("honours an explicit getPrincipal extractor", {
        timeout: 5000,
    }, async () => {
        const store = new WeakMap<Request, Principal | null>();
        const resolver = createJwtTenantResolver({
            getPrincipal: (r) => store.get(r) ?? null,
        });
        const req = new Request("https://example.com/z");
        store.set(req, principalWith({ tenantId: "via-map" as TenantId }));
        const ctx = await resolver.resolve(req);
        expect(ctx).toEqual({ id: "via-map", slug: "via-map" });
    });

    it("uses the configured id", { timeout: 5000 }, () => {
        expect(createJwtTenantResolver().id).toBe("jwt");
        expect(createJwtTenantResolver({ id: "primary" }).id).toBe("primary");
    });

    it("propagates an INVALID_OPTIONS error for bad input", {
        timeout: 5000,
    }, () => {
        expect(() => createJwtTenantResolver({ claimKey: "" })).toThrow(
            JwtTenantResolverError
        );
    });

    it("treats undefined principal from extractor as null", {
        timeout: 5000,
    }, async () => {
        const resolver = createJwtTenantResolver({
            getPrincipal: () => undefined,
        });
        const req = new Request("https://example.com/u");
        expect(await resolver.resolve(req)).toBeNull();
    });
});