import { sdk } from '../sdk'
import { configFile } from '../file-models/config.json'

const { InputSpec, Value, Variants } = sdk

// Operator-facing knob for tier-quota tuning without a code change or
// redeploy. The schema is { core: TierConfig, pro: TierConfig,
// max: TierConfig } where TierConfig fields can be number or null.
// `null` means "no cap on this dimension." The relay reads this on
// every request via configFile's live-reload.

// Max-tier monthly credits is rendered as a union — operator can pick
// "unlimited" (the default) or specify a hard monthly cap. Surfaced
// as a Value.union so the StartOS UI gives a clean radio-style choice
// rather than relying on a sentinel like 0 = unlimited.
const maxMonthlyVariants = Variants.of({
  unlimited: {
    name: 'Unlimited',
    spec: InputSpec.of({}),
  },
  limited: {
    name: 'Limit to a specific amount',
    spec: InputSpec.of({
      amount: Value.number({
        name: 'Monthly Limit',
        description:
          'Total credits each Max-tier install gets per calendar month.',
        required: true,
        default: 1000,
        min: 0,
        max: 1_000_000,
        integer: true,
        step: 1,
        units: 'credits',
        placeholder: null,
      }),
    }),
  },
})

const inputSpec = InputSpec.of({
  // Core tier knobs.
  core_lifetime: Value.number({
    name: 'Core — Lifetime Credits',
    description:
      'Total credits a Core (unlicensed) install can ever spend across its lifetime. Default 10 (5 served via Gemini + 5 via operator hardware).',
    required: true,
    default: 10,
    min: 0,
    max: 1_000_000,
    integer: true,
    step: 1,
    units: 'credits',
    placeholder: null,
  }),
  core_gemini_cap: Value.number({
    name: 'Core — Gemini Cap (lifetime)',
    description:
      'Within the Core lifetime allowance, how many credits may be served via Gemini (the rest spill to the operator-hardware fallback). Default 5.',
    required: true,
    default: 5,
    min: 0,
    max: 1_000_000,
    integer: true,
    step: 1,
    units: 'credits',
    placeholder: null,
  }),
  // Pro tier knobs.
  pro_monthly: Value.number({
    name: 'Pro — Monthly Credits',
    description:
      'Total credits a Pro user gets each billing period. Renewals are calendar-anniversary based: a user who first activates on the 17th renews on the 17th of every following month (clamps to the last day for shorter months — e.g. Jan 31 → Feb 28/29 → Mar 31). Default 50.',
    required: true,
    default: 50,
    min: 0,
    max: 1_000_000,
    integer: true,
    step: 1,
    units: 'credits',
    placeholder: null,
  }),
  pro_gemini_cap: Value.number({
    name: 'Pro — Gemini Cap (monthly)',
    description:
      'Within the Pro monthly allowance, how many credits may be served via Gemini (the rest spill to the operator-hardware fallback). Default 25.',
    required: true,
    default: 25,
    min: 0,
    max: 1_000_000,
    integer: true,
    step: 1,
    units: 'credits',
    placeholder: null,
  }),
  // Max tier knobs.
  max_monthly: Value.union({
    name: 'Max — Monthly Credits',
    description:
      'Max-tier users default to unlimited monthly credits. Switch to "Limit to a specific amount" to cap how many credits each Max install can spend per month.',
    default: 'unlimited',
    variants: maxMonthlyVariants,
  }),
  max_gemini_cap: Value.number({
    name: 'Max — Gemini Cap (monthly)',
    description:
      'Within the Max monthly allowance, how many credits may be served via Gemini (the rest spill to the operator-hardware fallback). Default 50.',
    required: true,
    default: 50,
    min: 0,
    max: 1_000_000,
    integer: true,
    step: 1,
    units: 'credits',
    placeholder: null,
  }),
})

export const adjustTierQuotas = sdk.Action.withInput(
  'adjust-tier-quotas',

  async ({ effects }) => ({
    name: 'Adjust Tier Quotas',
    description:
      'Tune the per-tier monthly credit caps and Gemini exposure without redeploying. Changes apply to the next request — no restart needed.',
    warning: null,
    allowedStatuses: 'any',
    group: 'Tiers',
    visibility: 'enabled',
  }),

  inputSpec,

  async ({ effects }) => {
    const config = await configFile.read().once()
    let parsed: any = {}
    try {
      parsed = JSON.parse(config?.relay_tier_quotas_json || '{}')
    } catch {
      parsed = {}
    }
    // Translate the saved `max.monthly` value back into the union shape.
    // null → unlimited; number → limited with that amount.
    const savedMaxMonthly = parsed?.max?.monthly
    const maxMonthlyUnion =
      savedMaxMonthly == null
        ? { selection: 'unlimited' as const, value: {} }
        : {
            selection: 'limited' as const,
            value: { amount: savedMaxMonthly },
          }
    return {
      core_lifetime: parsed?.core?.lifetime ?? 10,
      core_gemini_cap: parsed?.core?.geminiCapLifetime ?? 5,
      pro_monthly: parsed?.pro?.monthly ?? 50,
      pro_gemini_cap: parsed?.pro?.geminiCapMonthly ?? 25,
      max_monthly: maxMonthlyUnion,
      max_gemini_cap: parsed?.max?.geminiCapMonthly ?? 50,
    }
  },

  async ({ effects, input }) => {
    // Resolve the Max monthly union back to a primitive value for
    // storage. The union arrives as { selection, value }; "unlimited"
    // → null, "limited" → the inner amount.
    const mmSel = (input.max_monthly as any)?.selection
    const mmVal = (input.max_monthly as any)?.value
    const maxMonthly =
      mmSel === 'limited'
        ? Number(mmVal?.amount ?? 1000)
        : null

    const quotas = {
      core: {
        lifetime: input.core_lifetime ?? 10,
        geminiCapLifetime: input.core_gemini_cap ?? 5,
        monthly: null,
        geminiCapMonthly: null,
      },
      pro: {
        lifetime: null,
        monthly: input.pro_monthly ?? 50,
        geminiCapMonthly: input.pro_gemini_cap ?? 25,
      },
      max: {
        lifetime: null,
        monthly: maxMonthly,
        geminiCapMonthly: input.max_gemini_cap ?? 50,
      },
    }
    await configFile.merge(effects, {
      relay_tier_quotas_json: JSON.stringify(quotas),
    })
    return null
  },
)