export interface AntigravityQuotaSortableItem {
  model: string
  label: string
  remainingPercent: number
  resetSeconds: number | null
  detail?: string
}

const ANTIGRAVITY_QUOTA_GROUPS = [
  { label: 'Gemini额度', matches: (model: string) => model.startsWith('gemini-') },
  {
    label: 'Claude & ChatGPT',
    matches: (model: string) => model.startsWith('claude-') || model.startsWith('gpt-'),
  },
] as const

const ANTIGRAVITY_MODEL_LABELS: Record<string, string> = {
  'gemini-pro-agent': 'Gemini 3.1 Pro (High)',
  'gemini-3.1-pro-high': 'Gemini 3.1 Pro (High)',
  'gemini-3.1-pro-low': 'Gemini 3.1 Pro (Low)',
  'gemini-3-flash-agent': 'Gemini 3.5 Flash (High)',
  'gemini-3.5-flash-low': 'Gemini 3.5 Flash (Medium)',
  'gemini-3.5-flash-extra-low': 'Gemini 3.5 Flash (Low)',
  'claude-opus-4-6-thinking': 'Claude Opus 4.6 (Thinking)',
  'claude-sonnet-4-6': 'Claude Sonnet 4.6 (Thinking)',
  'claude-sonnet-4-6-thinking': 'Claude Sonnet 4.6 (Thinking)',
  'gemini-3.1-flash-image': 'Gemini 3.1 Flash Image',
  'gemini-3.1-flash-lite': 'Gemini 3.1 Flash Lite',
  'gemini-3-flash': 'Gemini 3 Flash',
  'gemini-2.5-pro': 'Gemini 2.5 Pro',
  'gemini-2.5-flash-thinking': 'Gemini 3.1 Flash Lite',
  'gemini-2.5-flash': 'Gemini 3.1 Flash Lite',
  'gemini-2.5-flash-lite': 'Gemini 3.1 Flash Lite',
  'gpt-oss-120b-medium': 'GPT-OSS 120B (Medium)',
  'tab_flash_lite_preview': 'Tab Flash Lite Preview',
  'tab_jump_flash_lite_preview': 'Tab Jump Flash Lite Preview',
  'models/proactive-observer': 'Proactive Observer',
}

const ANTIGRAVITY_MODEL_PRIORITY: Record<string, number> = {
  'claude-opus-4-6-thinking': 10,
  'claude-sonnet-4-6': 20,
  'claude-sonnet-4-6-thinking': 25,
  'gemini-pro-agent': 30,
  'gemini-3.1-pro-high': 35,
  'gemini-3.1-pro-low': 40,
  'gemini-3-flash-agent': 50,
  'gemini-3.5-flash-low': 60,
  'gemini-3.5-flash-extra-low': 70,
  'gemini-3.1-flash-image': 80,
  'gemini-3.1-flash-lite': 90,
  'gemini-3-flash': 180,
  'gemini-2.5-pro': 300,
  'gemini-2.5-flash-thinking': 310,
  'gemini-2.5-flash': 320,
  'gemini-2.5-flash-lite': 330,
  'gpt-oss-120b-medium': 700,
  'models/proactive-observer': 780,
  'tab_flash_lite_preview': 800,
  'tab_jump_flash_lite_preview': 810,
}

export function isOpaqueAntigravityQuotaIdentifier(value: string): boolean {
  return value.trim().startsWith('RateLimitResetCredit_')
}

export function resolveAntigravityQuotaLabel(
  model: string,
  rawLabel: unknown,
  opaqueDisplayIndex: { value: number },
): string {
  const normalizedModel = model.trim()
  const canonical = ANTIGRAVITY_MODEL_LABELS[normalizedModel]
  if (canonical) return canonical

  const candidate = String(rawLabel || '').trim()
  if (candidate && !isOpaqueAntigravityQuotaIdentifier(candidate)) return candidate
  if (isOpaqueAntigravityQuotaIdentifier(normalizedModel) || (candidate && isOpaqueAntigravityQuotaIdentifier(candidate))) {
    const label = `Key-${opaqueDisplayIndex.value}`
    opaqueDisplayIndex.value += 1
    return label
  }
  return candidate || normalizedModel
}

function getAntigravityModelPriority(model: string): number {
  const normalizedModel = model.trim()
  const explicit = ANTIGRAVITY_MODEL_PRIORITY[normalizedModel]
  if (explicit !== undefined) return explicit
  if (normalizedModel.startsWith('claude-')) return 30
  if (normalizedModel.startsWith('gemini-3.')) return 200
  if (normalizedModel.startsWith('gemini-2.')) return 390
  if (normalizedModel.startsWith('gemini-')) return 490
  if (normalizedModel.startsWith('gpt-oss-')) return 700
  if (normalizedModel.startsWith('models/')) return 780
  if (normalizedModel.startsWith('tab_')) return 800
  if (normalizedModel.startsWith('chat_')) return 900
  if (isOpaqueAntigravityQuotaIdentifier(normalizedModel)) return 950
  return 850
}

export function compareAntigravityQuotaItems<T extends AntigravityQuotaSortableItem>(
  a: T,
  b: T,
): number {
  return (getAntigravityModelPriority(a.model) - getAntigravityModelPriority(b.model))
    || ((a.resetSeconds ?? Number.POSITIVE_INFINITY) - (b.resetSeconds ?? Number.POSITIVE_INFINITY))
    || (a.remainingPercent - b.remainingPercent)
    || a.label.localeCompare(b.label)
    || a.model.localeCompare(b.model)
}

export function dedupeAntigravityQuotaItemsByLabel<T extends AntigravityQuotaSortableItem>(
  items: T[],
): T[] {
  const selectedByLabel = new Map<string, T>()
  for (const item of items) {
    const label = item.label.trim()
    if (!label) continue
    const selected = selectedByLabel.get(label)
    if (!selected || compareAntigravityQuotaItems(item, selected) < 0) {
      selectedByLabel.set(label, item)
    }
  }
  return Array.from(selectedByLabel.values()).sort(compareAntigravityQuotaItems)
}

export function summarizeAntigravityQuotaItems<T extends AntigravityQuotaSortableItem>(
  items: T[],
): T[] {
  const itemsByGroup = new Map<string, T[]>()
  for (const item of items) {
    const normalizedModel = item.model.trim().toLowerCase().replace(/^model:/, '')
    const group = ANTIGRAVITY_QUOTA_GROUPS.find(candidate => candidate.matches(normalizedModel))
    if (!group) continue
    const groupedItems = itemsByGroup.get(group.label) ?? []
    groupedItems.push(item)
    itemsByGroup.set(group.label, groupedItems)
  }

  return ANTIGRAVITY_QUOTA_GROUPS.map(group => group.label)
    .map((label) => {
      const groupedItems = itemsByGroup.get(label)
      if (!groupedItems?.length) return undefined
      const remainingValues = groupedItems
        .map(item => item.remainingPercent)
        .sort((left, right) => left - right)
      const minRemaining = remainingValues[0] ?? 0
      const maxRemaining = remainingValues.at(-1) ?? minRemaining
      const selected = groupedItems.find(item => item.remainingPercent === minRemaining) ?? groupedItems[0]
      const detail = Math.abs(maxRemaining - minRemaining) < 1e-6
        ? formatAntigravityQuotaValue(minRemaining)
        : `${formatAntigravityQuotaValue(minRemaining)}–${formatAntigravityQuotaValue(maxRemaining)}`
      return { ...selected, label, remainingPercent: minRemaining, detail }
    })
    .filter((item): item is T => item !== undefined)
}

function formatAntigravityQuotaValue(value: number): string {
  const rounded = Math.round(value)
  const formatted = Math.abs(value - rounded) < 1e-6 ? String(rounded) : value.toFixed(1)
  return `${formatted}%`
}