/*
 * 文件定位：Agent 运行态实现层 / 自适应运行面。
 * 核心目的：承载 adaptive Provider Fallback 这一能力位点。
 * 能力要求1：需要把文件名表达的能力落实成清晰的类型、输入输出和最小行为。
 * 能力要求2：如果后续发现语义不足，应优先补接口契约，而不是把逻辑散落到相邻文件。
 * 边界：承托和治理运行态，不吞并执行引擎、模型适配器或官方模块内部实现。
 * 对接：需要服务 applicationSurface、officialModuleSurface、governancePlane、invocationMethod 和 inspection/debug 等运行面。
 * 实现提示：先补稳定类型契约、最小可测行为和清晰错误边界，再接入真实执行逻辑。
 */
function hasText(value) {
    return typeof value === "string" && value.trim().length > 0;
}
function cleanList(values) {
    return [...new Set((values ?? []).map((value) => value.trim()).filter(Boolean))];
}
function normalizeCaller(caller) {
    const normalized = {
        kind: caller.kind,
        id: caller.id.trim(),
    };
    const moduleId = caller.moduleId?.trim();
    if (moduleId !== undefined && moduleId.length > 0) {
        normalized.moduleId = moduleId;
    }
    const sessionId = caller.sessionId?.trim();
    if (sessionId !== undefined && sessionId.length > 0) {
        normalized.sessionId = sessionId;
    }
    return normalized;
}
function failure(code, message, boundary) {
    return {
        ok: false,
        error: { code, message, boundary, publicSafe: true },
        events: ["runtime.adaptiveRuntime.adaptiveProviderFallback.rejected"],
    };
}
function rankProvider(provider) {
    const priority = Number.isFinite(provider.priority) ? Number(provider.priority) : 0;
    const healthScore = Number.isFinite(provider.healthScore) ? Number(provider.healthScore) : 1;
    const latencyPenalty = Number.isFinite(provider.latencyMs) ? Math.max(Number(provider.latencyMs), 0) / 1000 : 0;
    return priority + healthScore - latencyPenalty;
}
function normalizeProvider(provider) {
    if (!hasText(provider.providerId)) {
        return failure("MISSING_PROVIDER_ID", "adaptive provider fallback requires every provider to have an id", "provider");
    }
    const normalized = {
        providerId: provider.providerId.trim(),
        ready: true,
        healthScore: Number.isFinite(provider.healthScore) ? Number(provider.healthScore) : 1,
        priority: Number.isFinite(provider.priority) ? Number(provider.priority) : 0,
        capabilities: cleanList(provider.capabilities),
        scopes: cleanList(provider.scopes),
        metadata: provider.metadata ?? {},
        rankScore: rankProvider(provider),
    };
    const providerKind = provider.provider?.trim();
    if (providerKind !== undefined && providerKind.length > 0) {
        normalized.provider = providerKind;
    }
    if (Number.isFinite(provider.latencyMs)) {
        normalized.latencyMs = Math.max(Number(provider.latencyMs), 0);
    }
    return normalized;
}
export function planAdaptiveProviderFallback(request) {
    if (request === undefined || !hasText(request.runtimeId)) {
        return failure("MISSING_RUNTIME_ID", "adaptive provider fallback requires a runtimeId", "input");
    }
    if (request.caller === undefined || !hasText(request.caller.id)) {
        return failure("MISSING_CALLER", "adaptive provider fallback requires a caller", "input");
    }
    if (request.runtimeReady === false) {
        return failure("RUNTIME_NOT_READY", "adaptive provider fallback can only plan against a ready runtime", "runtime-state");
    }
    if (request.contract?.accepted === false) {
        return failure("CONTRACT_REJECTED", request.contract.reason ?? "adaptive provider fallback was rejected by contract surface", "contract");
    }
    if (request.governance?.accepted === false) {
        return failure("GOVERNANCE_REJECTED", request.governance.reason ?? "adaptive provider fallback was rejected by governance", "governance");
    }
    if ((request.providers ?? []).length === 0) {
        return failure("MISSING_PROVIDERS", "adaptive provider fallback requires at least one provider candidate", "input");
    }
    const requiredCapabilities = cleanList(request.requiredCapabilities);
    const allowedScopes = cleanList(request.allowedScopes);
    const candidates = [];
    const rejectedProviderIds = [];
    for (const provider of request.providers ?? []) {
        const normalized = normalizeProvider(provider);
        if ("ok" in normalized) {
            return normalized;
        }
        const ready = provider.ready !== false;
        const capabilityMatches = requiredCapabilities.every((capability) => normalized.capabilities.includes(capability));
        const deniedScopes = allowedScopes.length === 0 ? [] : normalized.scopes.filter((scope) => !allowedScopes.includes(scope));
        if (deniedScopes.length > 0) {
            return failure("SCOPE_DENIED", `adaptive provider fallback includes scopes outside governance: ${deniedScopes.join(", ")}`, "scope");
        }
        if (ready && capabilityMatches) {
            candidates.push(normalized);
        }
        else {
            rejectedProviderIds.push(normalized.providerId);
        }
    }
    const sortedCandidates = [...candidates].sort((left, right) => right.rankScore - left.rankScore || left.providerId.localeCompare(right.providerId));
    const currentProviderId = request.currentProviderId?.trim();
    const fallbackChain = sortedCandidates.filter((provider) => provider.providerId !== currentProviderId);
    const selectedProvider = currentProviderId !== undefined && currentProviderId.length > 0 ? fallbackChain[0] : sortedCandidates[0];
    if (selectedProvider === undefined) {
        return failure("NO_FALLBACK_PROVIDER", "adaptive provider fallback could not find a ready provider with the required capabilities", "provider");
    }
    const runtimeId = request.runtimeId.trim();
    const plan = {
        planId: `${runtimeId}:adaptiveProviderFallback:${selectedProvider.providerId}`,
        runtimeId,
        caller: normalizeCaller(request.caller),
        route: "runtime.adaptiveRuntime.adaptiveProviderFallback",
        selectedProvider,
        fallbackChain,
        rejectedProviderIds,
        requiredCapabilities,
        contractChecked: true,
        governanceChecked: true,
        dryRun: true,
        unsafeSideEffects: false,
    };
    if (currentProviderId !== undefined && currentProviderId.length > 0) {
        plan.currentProviderId = currentProviderId;
    }
    return {
        ok: true,
        plan,
        events: ["runtime.adaptiveRuntime.adaptiveProviderFallback.planned"],
    };
}
