import type { Sides } from "../../engine/geometry";
import type { TypeToken } from "../../fonts/roles";
import type { GapRange } from "../neutral/variant";

/**
 * Gotham (commercial) is drawn with Montserrat, which runs about 4% wider at the same size. Every Gotham-derived
 * size is multiplied by this when a token is defined, so the substitute takes the width the design has. A real
 * Gotham imported over the licensed name takes the design size back: each such token carries it as `ownFont.size`.
 */
export const GOTHAM_SIZE = 0.96;
const round2 = (n: number) => Math.round(n * 100) / 100;
/** The size a Gotham design value takes in Montserrat. */
export const gotham = (designSize: number) => round2(designSize * GOTHAM_SIZE);

/** Type roles of Purple Pop (DM Sans, Gotham -> Montserrat, the wordmark in Poppins 800). */
export interface PurpleRoles {
  /** The oversized "Invoice" wordmark. */
  wordmark: TypeToken;
  /** "TAX" above the wordmark on a tax invoice. */
  taxCaption: TypeToken;
  brand: TypeToken;
  /** "INVOICE NO : 012345" in the grey pill. */
  pill: TypeToken;
  /** "BILLED TO:", "AMOUNT DUE:", "PAYMENT METHOD". */
  label: TypeToken;
  clientName: TypeToken;
  clientLine: TypeToken;
  amount: TypeToken;
  date: TypeToken;
  tableHead: TypeToken;
  tableBody: TypeToken;
  tableSub: TypeToken;
  totalLabel: TypeToken;
  totalValue: TypeToken;
  grand: TypeToken;
  grandValue: TypeToken;
  words: TypeToken;
  wordsLabel: TypeToken;
  termsLabel: TypeToken;
  bullet: TypeToken;
  bank: TypeToken;
  contact: TypeToken;
  /** GSTIN and PAN under the vendor name. */
  small: TypeToken;
  fine: TypeToken;
  signName: TypeToken;
  footer: TypeToken;
}

/** Type roles of Citrus Split (Now -> Jost for the wordmark, DM Sans, Gotham -> Montserrat). */
export interface CitrusRoles {
  title: TypeToken;
  taxCaption: TypeToken;
  brand: TypeToken;
  metaLabel: TypeToken;
  metaValue: TypeToken;
  metaStrong: TypeToken;
  billedLabel: TypeToken;
  clientName: TypeToken;
  clientLine: TypeToken;
  headService: TypeToken;
  headNum: TypeToken;
  tableBody: TypeToken;
  tableSub: TypeToken;
  totalLabel: TypeToken;
  totalValue: TypeToken;
  grand: TypeToken;
  grandValue: TypeToken;
  words: TypeToken;
  wordsLabel: TypeToken;
  sectionLabel: TypeToken;
  bank: TypeToken;
  bullet: TypeToken;
  contact: TypeToken;
  small: TypeToken;
  fine: TypeToken;
  signName: TypeToken;
  footer: TypeToken;
}

export type NorthlineId = "purple-pop" | "citrus-split";

interface Common {
  margins: Sides;
  marginFloor: Sides;
  signatureImageH: number;
  chromeLeftW: number;
}

/**
 * Purple Pop: y values are design distances measured on the reference A4 page (docs/templates/12-purple-pop.md)
 * converted to flow gaps; x values are relative to the content edge (the left margin, x 54.8), so the same
 * tokens serve every margin preset and both page sizes.
 */
export interface PurpleVariant extends Common {
  id: "purple-pop";
  roles: PurpleRoles;
  ink: string;
  purple: string;
  yellow: string;
  grey: string;
  /** Alternate item row fill (the grey at 68% on cream, flattened). */
  rowGrey: string;
  cream: string;
  watermark: string;
  /** Header: inset of the vendor name and of the pill's right edge from the content edges. */
  head: { nameInset: number; pillInset: number; pillH: number; pillPadX: number; nameMaxW: number; minNameW: number };
  /** Client column: label inset, pill padding, the column's width and the gap to the wordmark. */
  client: { inset: number; pillH: number; pillPadX: number; colW: number; colGap: number; wordmarkInset: number };
  rule: { w: number; left: number; right: number };
  /** Amount due / dates band. */
  band: { amountInset: number; datesInset: number; gap: number };
  /** Table: left offset of the narrow variant, the right inset, the pill paddings and the column widths. */
  table: { narrowLeft: number; fullLeft: number; right: number; inset: number; headH: number; rowH: number; radiusHead: number; radiusRow: number; cols: { qty: number; rate: number; amount: number }; narrowDescMin: number };
  asterisk: { size: number; offsetX: number; offsetY: number };
  dome: { x: number; w: number };
  totals: { boxW: number; labelInset: number; valueInset: number; rowGap: number; pillH: number; pillValueInset: number; wordsGap: number };
  terms: { labelInset: number; labelW: number; signW: number; besideMax: number };
  footer: { ruleLeft: number; ruleRight: number; bankW: number; contactLeft: number; contactW: number; addressLeft: number; iconW: number; iconGap: number };
  gaps: {
    /** Header row (or its GSTIN/PAN lines) to the client row. */
    client: GapRange;
    rule: GapRange;
    band: GapRange;
    table: GapRange;
    tail: GapRange;
    termsAbove: number;
    ruleGap: number;
  };
}

/**
 * Citrus Split (docs/templates/13-citrus-split.md). x values are relative to the content edge (the left
 * margin, x 73.3 on the reference page); the grey stripe is anchored to the RIGHT margin, so on Letter the extra
 * width goes to the left column.
 */
export interface CitrusVariant extends Common {
  id: "citrus-split";
  roles: CitrusRoles;
  ink: string;
  text: string;
  blush: string;
  panel: string;
  orange: string;
  label: string;
  /** Orange of the icon glyphs. */
  icon: string;
  stripeW: number;
  /** The header's panel cell: inset of the logo from the stripe's left edge, and the gap between a mark and the name. */
  head: { panelInset: number; markGap: number };
  /** Client block: inset of its text from the content edge and the gap to the stripe. */
  client: { inset: number; gap: number; labelGap: number; nameGap: number };
  /** Meta row: inset of the first cell, minimum cell widths, panel-side start, gap between a label and its value. */
  meta: { inset: number; noMin: number; dateMin: number; dueW: number; panelInset: number; labelGap: number };
  /** Table: left offset from the content edge, header height, the SERVICE text inset, body text inset and row padding, columns. */
  table: { left: number; headH: number; headInset: number; bodyInset: number; padY: number; padYMin: number; descRight: number; cols: { qty: number; rate: number; amount: number } };
  separator: { color: string; h: number };
  totals: { labelInset: number; valueInset: number; rowGap: number; barH: number; barInset: number; barGap: number; sepGap: number; wordsGap: number };
  closing: { methodInset: number; bankInset: number; bulletInset: number; bulletText: number; bulletGap: number; sectionGap: number; labelGap: number; iconSize: number; iconGap: number; iconInset: number; contactGap: number; signW: number; clientTop: number; termsBesideMax: number };
  gaps: {
    /** Client block above the table (only when the invoice is more than a page). */
    client: GapRange;
    meta: GapRange;
    table: GapRange;
    tail: GapRange;
  };
}

export type NorthlineVariant = PurpleVariant | CitrusVariant;