import * as z from "zod/mini";

export const attentionPolicySourceSchema = z.enum(["default", "custom"]);

export const attentionExclusiveSurfaceStrategySchema = z.enum(["queue"]);

export const attentionBlockedBroadcastStrategySchema = z.enum(["queue"]);

const legacyAttentionPolicyConfigFields = {
	version: z.string().check(z.trim(), z.minLength(1)),
	source: attentionPolicySourceSchema,
	recentFlowCooldownMs: z.number().check(z.positive()),
	exclusiveSurfaceStrategy: attentionExclusiveSurfaceStrategySchema,
	blockedBroadcastStrategy: attentionBlockedBroadcastStrategySchema,
};

export const legacyAttentionPolicyConfigSchema = z.strictObject(
	legacyAttentionPolicyConfigFields,
);

// V2 is the additive policy envelope for the flow-display wire contract.
// Keep legacy strict, and add future policy controls here instead of creating
// another versioned sibling field for every new setting.
export const attentionPolicyConfigSchema = z.looseObject({
	...legacyAttentionPolicyConfigFields,
	recentInAppCooldownMs: z._default(z.number().check(z.nonnegative()), 0),
	automaticInAppWeeklyLimit: z.optional(
		z.number().check(z.int(), z.positive()),
	),
});

export type AttentionPolicyConfig = z.output<
	typeof attentionPolicyConfigSchema
>;

export type ResolvedAttentionPolicyConfig = AttentionPolicyConfig & {
	automaticInAppWeeklyLimit: number;
};

export const DEFAULT_ATTENTION_POLICY_CONFIG: ResolvedAttentionPolicyConfig = {
	version: "attention-policy-default-v1",
	source: "default",
	recentFlowCooldownMs: 5 * 60 * 1000,
	recentInAppCooldownMs: 0,
	automaticInAppWeeklyLimit: 3,
	exclusiveSurfaceStrategy: "queue",
	blockedBroadcastStrategy: "queue",
};