import { visibleWidth } from "@earendil-works/pi-tui";

const ESC = "\x1b";
const GLYPH = "\u{10eeee}";
const ROW_COLUMN_DIACRITICS = [
	"\u{305}",
	"\u{30D}",
	"\u{30E}",
	"\u{310}",
	"\u{312}",
	"\u{33D}",
	"\u{33E}",
	"\u{33F}",
	"\u{346}",
	"\u{34A}",
	"\u{34B}",
	"\u{34C}",
	"\u{350}",
	"\u{351}",
	"\u{352}",
	"\u{357}",
	"\u{35B}",
	"\u{363}",
	"\u{364}",
	"\u{365}",
	"\u{366}",
	"\u{367}",
	"\u{368}",
	"\u{369}",
	"\u{36A}",
	"\u{36B}",
	"\u{36C}",
	"\u{36D}",
	"\u{36E}",
	"\u{36F}",
	"\u{483}",
	"\u{484}",
	"\u{485}",
	"\u{486}",
	"\u{487}",
	"\u{592}",
	"\u{593}",
	"\u{594}",
	"\u{595}",
	"\u{597}",
	"\u{598}",
	"\u{599}",
	"\u{59C}",
	"\u{59D}",
	"\u{59E}",
	"\u{59F}",
	"\u{5A0}",
	"\u{5A1}",
	"\u{5A8}",
	"\u{5A9}",
	"\u{5AB}",
	"\u{5AC}",
	"\u{5AF}",
	"\u{5C4}",
	"\u{610}",
	"\u{611}",
	"\u{612}",
	"\u{613}",
	"\u{614}",
	"\u{615}",
	"\u{616}",
	"\u{617}",
	"\u{657}",
	"\u{658}",
	"\u{659}",
	"\u{65A}",
	"\u{65B}",
	"\u{65D}",
	"\u{65E}",
	"\u{6D6}",
	"\u{6D7}",
	"\u{6D8}",
	"\u{6D9}",
	"\u{6DA}",
	"\u{6DB}",
	"\u{6DC}",
	"\u{6DF}",
	"\u{6E0}",
	"\u{6E1}",
	"\u{6E2}",
	"\u{6E4}",
	"\u{6E7}",
	"\u{6E8}",
	"\u{6EB}",
	"\u{6EC}",
	"\u{730}",
	"\u{732}",
	"\u{733}",
	"\u{735}",
	"\u{736}",
	"\u{73A}",
	"\u{73D}",
	"\u{73F}",
	"\u{740}",
	"\u{741}",
	"\u{743}",
	"\u{745}",
	"\u{747}",
	"\u{749}",
	"\u{74A}",
	"\u{7EB}",
	"\u{7EC}",
	"\u{7ED}",
	"\u{7EE}",
	"\u{7EF}",
	"\u{7F0}",
	"\u{7F1}",
	"\u{7F3}",
	"\u{816}",
	"\u{817}",
	"\u{818}",
	"\u{819}",
	"\u{81B}",
	"\u{81C}",
	"\u{81D}",
	"\u{81E}",
	"\u{81F}",
	"\u{820}",
	"\u{821}",
	"\u{822}",
	"\u{823}",
	"\u{825}",
	"\u{826}",
	"\u{827}",
	"\u{829}",
	"\u{82A}",
	"\u{82B}",
	"\u{82C}",
	"\u{82D}",
	"\u{951}",
	"\u{953}",
	"\u{954}",
	"\u{F82}",
	"\u{F83}",
	"\u{F86}",
	"\u{F87}",
	"\u{135D}",
	"\u{135E}",
	"\u{135F}",
	"\u{17DD}",
	"\u{193A}",
	"\u{1A17}",
	"\u{1A75}",
	"\u{1A76}",
	"\u{1A77}",
	"\u{1A78}",
	"\u{1A79}",
	"\u{1A7A}",
	"\u{1A7B}",
	"\u{1A7C}",
	"\u{1B6B}",
	"\u{1B6D}",
	"\u{1B6E}",
	"\u{1B6F}",
	"\u{1B70}",
	"\u{1B71}",
	"\u{1B72}",
	"\u{1B73}",
	"\u{1CD0}",
	"\u{1CD1}",
	"\u{1CD2}",
	"\u{1CDA}",
	"\u{1CDB}",
	"\u{1CE0}",
	"\u{1DC0}",
	"\u{1DC1}",
	"\u{1DC3}",
	"\u{1DC4}",
	"\u{1DC5}",
	"\u{1DC6}",
	"\u{1DC7}",
	"\u{1DC8}",
	"\u{1DC9}",
	"\u{1DCB}",
	"\u{1DCC}",
	"\u{1DD1}",
	"\u{1DD2}",
	"\u{1DD3}",
	"\u{1DD4}",
	"\u{1DD5}",
	"\u{1DD6}",
	"\u{1DD7}",
	"\u{1DD8}",
	"\u{1DD9}",
	"\u{1DDA}",
	"\u{1DDB}",
	"\u{1DDC}",
	"\u{1DDD}",
	"\u{1DDE}",
	"\u{1DDF}",
	"\u{1DE0}",
	"\u{1DE1}",
	"\u{1DE2}",
	"\u{1DE3}",
	"\u{1DE4}",
	"\u{1DE5}",
	"\u{1DE6}",
	"\u{1DFE}",
	"\u{20D0}",
	"\u{20D1}",
	"\u{20D4}",
	"\u{20D5}",
	"\u{20D6}",
	"\u{20D7}",
	"\u{20DB}",
	"\u{20DC}",
	"\u{20E1}",
	"\u{20E7}",
	"\u{20E9}",
	"\u{20F0}",
	"\u{2CEF}",
	"\u{2CF0}",
	"\u{2CF1}",
	"\u{2DE0}",
	"\u{2DE1}",
	"\u{2DE2}",
	"\u{2DE3}",
	"\u{2DE4}",
	"\u{2DE5}",
	"\u{2DE6}",
	"\u{2DE7}",
	"\u{2DE8}",
	"\u{2DE9}",
	"\u{2DEA}",
	"\u{2DEB}",
	"\u{2DEC}",
	"\u{2DED}",
	"\u{2DEE}",
	"\u{2DEF}",
	"\u{2DF0}",
	"\u{2DF1}",
	"\u{2DF2}",
	"\u{2DF3}",
	"\u{2DF4}",
	"\u{2DF5}",
	"\u{2DF6}",
	"\u{2DF7}",
	"\u{2DF8}",
	"\u{2DF9}",
	"\u{2DFA}",
	"\u{2DFB}",
	"\u{2DFC}",
	"\u{2DFD}",
	"\u{2DFE}",
	"\u{2DFF}",
	"\u{A66F}",
	"\u{A67C}",
	"\u{A67D}",
	"\u{A6F0}",
	"\u{A6F1}",
	"\u{A8E0}",
	"\u{A8E1}",
	"\u{A8E2}",
	"\u{A8E3}",
	"\u{A8E4}",
	"\u{A8E5}",
] as const;

export interface Sink {
	write(sequence: string): void;
}
export function tmux(sequence: string): string {
	return `${ESC}Ptmux;${sequence.replaceAll(ESC, ESC + ESC)}${ESC}\\`;
}
export function kitty(command: string, inTmux: boolean): string {
	const sequence = `${ESC}_G${command}${ESC}\\`;
	return inTmux ? tmux(sequence) : sequence;
}
export function upload(base64: string, imageId: number, inTmux: boolean): string[] {
	const chunks = base64.match(/.{1,4096}/gu) ?? [""];
	return chunks.map((chunk, index) =>
		kitty(`${index ? "" : `a=t,f=100,i=${imageId},q=2,`}m=${index + 1 < chunks.length ? 1 : 0};${chunk}`, inTmux),
	);
}
function placementId(imageId: number): number {
	return imageId & 0xffffff || 1;
}
export function placement(imageId: number, columns: number, rows: number, inTmux: boolean): string {
	return kitty(`a=p,i=${imageId},p=${placementId(imageId)},U=1,c=${columns},r=${rows},q=2;`, inTmux);
}
/** Delete one virtual placement while retaining its uploaded image data. */
export function deletePlacement(imageId: number, inTmux: boolean): string {
	return kitty(`a=d,d=i,i=${imageId},p=${placementId(imageId)},q=2;`, inTmux);
}
export function deleteImage(imageId: number, inTmux: boolean): string {
	return kitty(`a=d,d=I,i=${imageId},q=2;`, inTmux);
}
function mark(index: number): string {
	const value = ROW_COLUMN_DIACRITICS[index];
	if (!value) throw new Error(`Kitty placeholder index ${index} exceeds supported diacritic table`);
	return value;
}
function rgb(code: 38 | 58, value: number): string {
	return `${ESC}[${code};2;${(value >>> 16) & 255};${(value >>> 8) & 255};${value & 255}m`;
}
/** Kitty Unicode placeholder: foreground is image ID, underline is placement ID. */
export function cell(column: number, row: number, imageId: number): string {
	const high = imageId >>> 24;
	return `${rgb(38, imageId & 0xffffff)}${rgb(58, imageId & 0xffffff || 1)}${GLYPH}${mark(row)}${mark(column)}${high ? mark(high) : ""}${ESC}[39;59m`;
}
export function grid(columns: number, rows: number, imageId: number): string[] {
	return Array.from({ length: rows }, (_, row) =>
		Array.from({ length: columns }, (_, column) => cell(column, row, imageId)).join(""),
	);
}
export function placeholderWidth(line: string): number {
	return visibleWidth(line);
}