/**
 * Peak/off-peak rule data for supported providers.
 *
 * Rules are DATA, not code: which days are peak days comes from
 * `peakWeekdays`, read on the billing calendar (calendarOffsetMinutes), not
 * on UTC. Vendors change these rules; each schedule carries its source URL
 * and the date it was last verified against (see README).
 */

export interface PeakWindow {
	/** Billing-calendar wall-clock start, "HH:mm" (inclusive). */
	start: string;
	/** Billing-calendar wall-clock end, "HH:mm" (exclusive). */
	end: string;
}

export interface PeakSchedule {
	id: string;
	label: string;
	shortLabel: string;
	/** Billing calendar as a fixed UTC offset in minutes (UTC+8 → 480). */
	calendarOffsetMinutes: number;
	/** Peak windows in billing-calendar wall time. */
	windows: PeakWindow[];
	/** ISO weekdays (1=Mon..7=Sun) on the billing calendar on which peak windows run. */
	peakWeekdays: number[];
	/**
	 * Instant (ISO) from which non-peak weekdays are entirely off-peak.
	 * Before this instant the weekday axis does not apply (pre-rule billing
	 * was window-only). null = the weekday axis always applies.
	 */
	weekendOffPeakFrom: string | null;
	offPeakMultiplier: number;
	/** Human note shown by /peak. */
	offPeakNote: string;
	/** Where the rule is published. */
	source: string;
}

/** DeepSeek API pricing. Verified 2026-08-28. */
export const DEEPSEEK: PeakSchedule = {
	id: "deepseek",
	label: "DeepSeek",
	shortLabel: "DS",
	calendarOffsetMinutes: 480,
	windows: [
		{ start: "09:00", end: "12:00" },
		{ start: "14:00", end: "18:00" },
	],
	peakWeekdays: [1, 2, 3, 4, 5],
	weekendOffPeakFrom: "2026-08-22T16:00:00Z",
	offPeakMultiplier: 0.5,
	offPeakNote: "off-peak = 50% of peak rates; weekends fully off-peak since Aug 23, 2026",
	source: "https://api-docs.deepseek.com/quick_start/pricing/",
};

/** Z.AI GLM Coding Plan. Verified 2026-08-28. */
export const GLM: PeakSchedule = {
	id: "glm",
	label: "GLM Coding Plan",
	shortLabel: "GLM",
	calendarOffsetMinutes: 480,
	windows: [{ start: "14:00", end: "18:00" }],
	peakWeekdays: [1, 2, 3, 4, 5],
	weekendOffPeakFrom: null,
	offPeakMultiplier: 0.5,
	offPeakNote: "legacy V2 plans: GLM-5.3 burns 1x off-peak / 3x peak, GLM-5.3-Flash 0.4x / 1.2x; new credit plans: off-peak = 50% of the standard credit rate (peak: Mon-Fri 14:00-18:00 UTC+8)",
	source: "https://docs.z.ai/devpack/overview",
};

export const SCHEDULES: PeakSchedule[] = [DEEPSEEK, GLM];