// What Alexa rejects at discovery, checked where a device is declared. Alexa gives no reason when it drops an
// endpoint: the user hears "no new devices found". Each rule names the page it is from.
import { DISPLAY_CATEGORIES, LIMITS } from "../registry/catalog.js";
import { labels, shownAs } from "../registry/resources.js";
import { SchemaError } from "../registry/schema.js";
import { DeclarationError } from "../registry/types.js";
// alexa-discovery-objects.html, "Endpoint object details": "letters, numbers, spaces, and the following special
// characters: _ - = # ; : ? @ &"
const ENDPOINT_ID = /^[A-Za-z0-9 _\-=#;:?@&]+$/;
// Same table: "alphanumeric characters and spaces". Letters of any script: Alexa speaks Hindi and Japanese too.
const FRIENDLY_NAME = /^[\p{L}\p{M}\p{N} ]+$/u;
const isText = (value) => typeof value === "string" && value.length > 0;
/** Throws the first rule of the Endpoint object that the fields break. */
export function checkEndpoint(endpoint) {
    const where = { endpointId: isText(endpoint.endpointId) ? endpoint.endpointId : undefined };
    function refuse(problem) {
        throw new DeclarationError(where, problem);
    }
    const { endpointId, friendlyName, description, manufacturerName, displayCategories, additionalAttributes, cookie } = endpoint;
    if (!isText(endpointId))
        refuse("an endpoint needs an endpointId");
    if (endpointId.length > LIMITS.endpointIdLength || !ENDPOINT_ID.test(endpointId)) {
        refuse(`the endpointId takes up to ${LIMITS.endpointIdLength} letters, digits, spaces and _ - = # ; : ? @ &`);
    }
    if (!isText(friendlyName))
        refuse("an endpoint needs a name");
    if (friendlyName.length > LIMITS.friendlyNameLength || !FRIENDLY_NAME.test(friendlyName)) {
        refuse(`the name ${JSON.stringify(friendlyName)} takes up to ${LIMITS.friendlyNameLength} letters, digits and spaces, no punctuation`);
    }
    if (!isText(manufacturerName) || manufacturerName.length > LIMITS.manufacturerNameLength) {
        refuse(`the manufacturerName takes 1 to ${LIMITS.manufacturerNameLength} characters`);
    }
    if (!isText(description) || description.length > LIMITS.descriptionLength) {
        refuse(`the description takes 1 to ${LIMITS.descriptionLength} characters`);
    }
    if (!Array.isArray(displayCategories) || displayCategories.length === 0)
        refuse("an endpoint needs a display category");
    const known = DISPLAY_CATEGORIES;
    for (const category of displayCategories) {
        if (!known.includes(category))
            refuse(`${JSON.stringify(category)} is not a display category`);
    }
    for (const [name, value] of Object.entries(additionalAttributes)) {
        if (typeof value !== "string" || value.length > LIMITS.additionalAttributeLength) {
            refuse(`${name} takes up to ${LIMITS.additionalAttributeLength} characters`);
        }
    }
    if (cookie !== undefined) {
        const bytes = Buffer.byteLength(JSON.stringify(cookie) ?? "");
        if (bytes > LIMITS.cookieBytes)
            refuse(`the cookie is ${bytes} bytes, ${LIMITS.cookieBytes} is the most`);
    }
}
/** alexa-discovery.html, "Interface limits". count includes the capabilities the library adds. */
export function checkCapabilityCount(endpointId, count) {
    if (count > LIMITS.capabilitiesPerEndpoint) {
        throw new DeclarationError({ endpointId }, `${count} capabilities, an endpoint takes ${LIMITS.capabilitiesPerEndpoint}`);
    }
}
// Two names are the same name when the app would show the same: the asset, or the text in one locale.
function nameKey(name) {
    return name["@type"] === "asset" ? `asset ${name.value.assetId}` : `text ${name.value.locale} ${name.value.text.toLowerCase()}`;
}
function phrases(capability) {
    const { semantics } = capability.options;
    return (semantics?.actionMappings ?? []).flatMap((mapping) => mapping.actions);
}
/**
 * Throws the first rule that a capability breaks on its endpoint. endpoint.capabilities are the ones declared
 * before it. A stub is checked for being declared twice and for nothing else: the library does not know its rules.
 */
export function checkCapability(capability, descriptor, endpoint) {
    function refuse(problem) {
        throw new DeclarationError(capability, problem);
    }
    const { namespace, instance, friendlyNames } = capability;
    // generic-controllers.html, "Multiple instances": one capability of an interface, or one per instance name
    if (endpoint.capabilities.some((other) => other.namespace === namespace && other.instance === instance)) {
        refuse(instance ? "the instance is declared twice" : "the interface is declared twice");
    }
    if (descriptor.tier === 3)
        return;
    if (descriptor.instanced) {
        // alexa-rangecontroller.html, "Capabilities array": instance and capabilityResources are required
        if (!isText(instance))
            refuse("needs an instance name, like Blind.Lift");
        try {
            labels.parse(friendlyNames, "friendlyNames");
        }
        catch (err) {
            refuse(err instanceof SchemaError && err.path === "friendlyNames" ? "needs a friendly name, from text() or asset()" : err.message);
        }
        // resources-and-assets.html, "CapabilityResources": "The first friendly name in the array must be unique for
        // the endpoint."
        const first = nameKey(friendlyNames[0]);
        const taken = endpoint.capabilities.find((other) => other.friendlyNames.length > 0 && nameKey(other.friendlyNames[0]) === first);
        if (taken) {
            refuse(`the first friendly name, ${shownAs(friendlyNames[0])}, is the first of ${taken.namespace} ${JSON.stringify(taken.instance)} too`);
        }
    }
    else {
        if (instance)
            refuse("takes no instance name: an endpoint has the interface once");
        if (friendlyNames.length > 0)
            refuse("takes no friendly names");
    }
    // generic-controllers.html, "Semantics for user utterances": "Each semantic phrase must be unique across all
    // controller instances for each endpoint"
    const used = new Map();
    for (const other of endpoint.capabilities)
        for (const phrase of phrases(other))
            used.set(phrase, other);
    for (const phrase of phrases(capability)) {
        const owner = used.get(phrase);
        if (owner) {
            const place = owner === capability ? "twice" : `here and on ${owner.namespace} ${JSON.stringify(owner.instance)}`;
            refuse(`${phrase} is mapped ${place}, an endpoint maps a phrase once`);
        }
        used.set(phrase, capability);
    }
    if (descriptor.validate)
        descriptor.validate(capability, endpoint);
}