export type MileageReportStatus = 'PREVIEW' | 'ARCHIVED';
export type MileageReportSource = 'LIVE' | 'AUTO' | 'XLSX_IMPORT';
export type MileageReportTone = 'positive' | 'warning' | 'critical' | 'neutral';

export interface MileageReportTrendPoint {
  date: string;
  totalMileage: number;
}

export interface MileageReportBreakdown {
  name: string;
  vehicleCount: number;
  totalMileage: number;
  averageMileage: number;
}

export interface MileageReportVehicle {
  plate: string;
  status: string;
  customer: string | null;
  department: string | null;
  inventoryRegion: string | null;
  dailyMileage: number;
  cumulativeMileage: number;
  completionRate: number;
  mileageBand: 'LOW' | 'HIGH' | 'INVENTORY';
  /** 以日报日期为结束日的近7日逐日里程；旧快照迁移前可能为空。 */
  trend?: MileageReportTrendPoint[];
}

export interface MileageReportGroup {
  targetId: number;
  targetName: string;
  displayName: string;
  vehicleCount: number;
  operatingCount: number;
  inventoryCount: number;
  dailyMileage: number;
  operatingMileage: number;
  inventoryMileage: number;
  yesterdayMileage: number;
  dayOverDayDelta: number;
  dayOverDayRate: number | null;
  lowMileageCount: number;
  highMileageCount: number;
  cumulativeMileage: number;
  totalMileageTarget: number;
  completionRate: number;
  qualifiedCount: number;
  halfQualifiedCount: number;
  currentYearTarget: number;
  currentYearCompleted: number;
  remainingMileage: number;
  dailyRequiredMileage: number;
  assessmentPeriods: string[];
  trend: MileageReportTrendPoint[];
  inventoryRegions: MileageReportBreakdown[];
  departments: MileageReportBreakdown[];
  vehicles: MileageReportVehicle[];
}

export interface MileageReportTotals {
  vehicleCount: number;
  operatingCount: number;
  inventoryCount: number;
  dailyMileage: number;
  operatingMileage: number;
  inventoryMileage: number;
  yesterdayMileage: number;
  dayOverDayDelta: number;
  dayOverDayRate: number | null;
  averageOperatingMileage: number;
  lowMileageCount: number;
  highMileageCount: number;
  qualifiedCount: number;
  halfQualifiedCount: number;
  dailyRequiredMileage: number;
  dailyTaskGap: number;
}

export interface MileageReportInsight {
  tone: MileageReportTone;
  title: string;
  detail: string;
}

export interface MileageReportQualityNote {
  level: 'info' | 'warning';
  message: string;
}

export interface DailyMileageReport {
  version: 1;
  reportDate: string;
  title: string;
  status: MileageReportStatus;
  source: MileageReportSource;
  generatedAt: string;
  sourceUpdatedAt: string | null;
  totals: MileageReportTotals;
  trend: MileageReportTrendPoint[];
  groups: MileageReportGroup[];
  insights: MileageReportInsight[];
  qualityNotes: MileageReportQualityNote[];
}

export interface MileageReportHistoryItem {
  reportDate: string;
  status: MileageReportStatus;
  source: MileageReportSource;
  generatedAt: string;
  vehicleCount: number;
  operatingCount: number;
  inventoryCount: number;
  dailyMileage: number;
  dayOverDayRate: number | null;
}

export interface MileageReportHistoryResponse {
  items: MileageReportHistoryItem[];
  latestDate: string | null;
}