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

const L = "Lustria" as const;
const N = "Now" as const;

export const INK = "#000000";
/** Hairlines around the parties band. */
export const RULE = "#E7E1E6";
/** Zebra rows. */
export const ZEBRA = "#F7F7F8";
/** The flat/gradient stand-in for the marble photograph: a light warm grey with a soft sheen. */
export const BAND_FROM = "#F4F3F5";
export const BAND_TO = "#ECEAEE";

/**
 * Marble's type (docs/templates/01-marble.md): Lustria in tracked caps for the title, headings, table heads and the
 * amount due; "Now" (drawn in Jost, the bundled look-alike) for everything else. Jost sets about 12% narrower than Now,
 * so every Now role carries the tracking that restores the reference widths (0.10 to 0.13 em on top of the design's
 * 0.04 em). A real Now imported by the user replaces Jost, so those roles take the design's 0.04 em back through
 * ownFont. Lustria ascent 0.955, descent 0.327; Jost 1.07 / 0.375.
 */
export const MARBLE_ROLES = defineRoles({
  /** "INVOICE" / "TAX INVOICE": 25.18 pt, tracked 0.192 em, shrunk to the room the stack has. */
  title: { face: L, weight: 400, size: 25.18, leading: 25.2, tracking: 0.192, caps: true, minSize: 13 },
  /** The vendor's name at the header's left (the design leaves it empty). */
  brand: { face: L, weight: 400, size: 12.65, leading: 18.2, tracking: 0.11, caps: true, minSize: 9 },
  meta: { face: N, weight: 400, size: 11.55, leading: 17.5, tracking: 0.105, ownFont: { tracking: 0.04 }, minSize: 8 },
  /** BILL TO:, PAYABLE TO:, SUPPLIER:. */
  heading: { face: L, weight: 400, size: 12.65, leading: 18.2, tracking: 0.11, caps: true },
  body: { face: N, weight: 400, size: 11.55, leading: 18.2, tracking: 0.105, ownFont: { tracking: 0.04 }, minSize: 8 },
  tableHead: { face: L, weight: 400, size: 11.68, leading: 16, tracking: 0.192, caps: true },
  tableBody: { face: N, weight: 400, size: 10.57, leading: 17.4, tracking: 0.102, ownFont: { tracking: 0.04 } },
  tableSub: { face: N, weight: 400, size: 8.5, leading: 11.5, tracking: 0.1, ownFont: { tracking: 0.04 } },
  totalLabel: { face: L, weight: 400, size: 9, leading: 16, tracking: 0.192, caps: true },
  totalValue: { face: N, weight: 400, size: 10.57, leading: 16, tracking: 0.102, ownFont: { tracking: 0.04 } },
  /** AMOUNT DUE: 14.6 pt, tracked 0.192 em. */
  due: { face: L, weight: 400, size: 14.6, leading: 20, tracking: 0.192, caps: true, minSize: 10 },
  small: { face: N, weight: 400, size: 9.6, leading: 15.3, tracking: 0.13, ownFont: { tracking: 0.04 } },
  smallLabel: { face: L, weight: 400, size: 9, leading: 15.3, tracking: 0.192, caps: true },
  signName: { face: N, weight: 400, size: 10.57, leading: 15, tracking: 0.102, ownFont: { tracking: 0.04 } },
  signDesignation: { face: N, weight: 400, size: 9.6, leading: 14, tracking: 0.13, ownFont: { tracking: 0.04 } },
  fine: { face: N, weight: 400, size: 8, leading: 11, tracking: 0.1, ownFont: { tracking: 0.04 } },
  /** The footer band's contact lines. */
  contact: { face: N, weight: 400, size: 9.6, leading: 15.3, tracking: 0.13, ownFont: { tracking: 0.04 }, minSize: 7 },
  footer: { face: N, weight: 400, size: 7 },
});

export type MarbleRoles = typeof MARBLE_ROLES;

/**
 * Reference A4 numbers: the rules and zebra bands start at x 31.5 and end at 549.8 (the text is inset 7 and 9.5 pt),
 * the right-hand column ends at 549.0; y values are the design's distances turned into flow gaps.
 */
export interface MarbleVariant {
  roles: MarbleRoles;
  ink: string;
  margins: Sides;
  marginFloor: Sides;
  /** Text inset inside the rules, left (parties) and right. */
  inset: { left: number; right: number };
  /** The top band's height and the bottom band's (A4 and Letter share the bottom band; the footer text is capped by lines). */
  bands: { top: number; bottom: number };
  head: {
    /** Title line box below the header's top (the logo slot's top). */
    titleTop: number;
    /** Title box bottom to the first line of the stack. */
    titleGap: number;
    /** The widest share of the content width the right-hand stack may take. */
    maxShare: number;
    minStackW: number;
    /** Vendor name top below the header's top when there is no logo; below the logo box otherwise. */
    nameTop: number;
    nameGap: number;
    minNameW: number;
    /** Space between the left column and the stack at its narrowest. */
    colGap: number;
    /** The logo slot's box height. */
    logoH: number;
  };
  rule: number;
  parties: { colA: number; colB: number; headingGap: number };
  gaps: {
    /** Header bottom to the first hairline. */
    headRule: GapRange;
    /** Hairline to the first heading, and the last info line to the second hairline. */
    infoTop: GapRange;
    infoBottom: GapRange;
    /** Second hairline to the table heading. */
    band: GapRange;
    /** Last table row to the totals. */
    tail: GapRange;
    /** The totals (or the notes) to the signature band. */
    close: GapRange;
  };
  table: {
    /** Heading box bottom to the first zebra band. */
    headGap: number;
    descInset: number;
    headDescInset: number;
    cols: { qty: number; rate: number; amount: number };
    numPad: number;
    /** Right padding of the rate column (the unit is part of the rate, so it gets less than the amounts). */
    ratePad: number;
    padY: (rows: number) => number;
    padYMin: number;
  };
  totals: { boxW: number; rowGap: number; dueGap: number; rightInset: number; leftGap: number; wordsMax: number };
  closing: { signW: number; gap: number; notesBesideMax: number; signatureImageH: number };
  footer: {
    /** Footer text left edge, from the page's left edge (A4 reference: x 40.7) and the second column's left (x 197.8). */
    col1: number;
    col2: number;
    colGap: number;
    col1MaxW: number;
    /** Band top to the first line box. */
    top: number;
    /** Lines the first column may take (name plus address) on A4 and Letter. */
    maxLines: number;
  };
}

export const MARBLE_VARIANT: MarbleVariant = {
  roles: MARBLE_ROLES,
  ink: INK,
  margins: { top: 86, right: 45.8, bottom: 24, left: 31.5 },
  marginFloor: { top: 86, right: 31.5, bottom: 24, left: 31.5 },
  inset: { left: 7, right: 0.8 },
  bands: { top: 64, bottom: 130 },
  head: { titleTop: 14.85, titleGap: 3.7, maxShare: 0.7, minStackW: 170, nameTop: 26.8, nameGap: 6, minNameW: 90, colGap: 24, logoH: 50 },
  rule: 0.75,
  parties: { colA: 172.9, colB: 168.6, headingGap: 2.6 },
  gaps: {
    headRule: { nominal: 36.8, min: 14 },
    infoTop: { nominal: 16.05, min: 10 },
    infoBottom: { nominal: 11.56, min: 8 },
    band: { nominal: 50.2, min: 22 },
    tail: { nominal: 14, min: 6 },
    close: { nominal: 14, min: 8 },
  },
  table: {
    headGap: 8.85,
    descInset: 9.5,
    headDescInset: 7.3,
    cols: { qty: 84, rate: 72.9, amount: 74.9 },
    numPad: 9.5,
    ratePad: 5,
    padY: (rows) => (rows <= 8 ? 7.3 : rows <= 14 ? 6 : 4.5),
    padYMin: 3.5,
  },
  totals: { boxW: 230, rowGap: 0, dueGap: 10, rightInset: 14.1, leftGap: 16, wordsMax: 280 },
  closing: { signW: 170, gap: 24, notesBesideMax: 90, signatureImageH: 40 },
  footer: { col1: 40.7, col2: 197.8, colGap: 24, col1MaxW: 190, top: 24.7, maxLines: 5 },
};

export const leading = (t: TypeToken) => t.leading as number;