/**
 * lost-property, in a terminal. The forge runs this on a pty when someone
 * `ssh`es to the app, with FORGE_APP_DATA pointing at the same data the
 * web page uses.
 *
 * j/k move, enter opens a case, a accessions something new, s/m leave a
 * note on an open case (saw one / have the other half), b or esc goes
 * back, q leaves. Plain ANSI, no dependencies.
 */

import { addNote, getItem, listItems, listNotes, createItem, type NoteKind } from "./db.ts";
import { catalogueNumber, conditionOf, vitrineOf, VITRINES } from "./museum.ts";

const where =
  process.env.FORGE_APP_ENV === "preview"
    ? `preview of #${process.env.FORGE_APP_PULL ?? "?"}`
    : (process.env.FORGE_APP_ENV ?? "local");

let screen: "list" | "case" = "list";
let cursor = 0;
let caseId: number | undefined;
let typing: { for: "description" } | { for: "note"; kind: NoteKind } | undefined;
let input = "";

const out = (s: string): void => {
  process.stdout.write(s);
};
const esc = "\x1b[";

function drawList(): void {
  const items = listItems();
  const lines: string[] = [];
  lines.push(`${esc}1mlost-property${esc}0m  ${esc}2m${where}${esc}0m`);
  lines.push("");
  if (items.length === 0) lines.push(`${esc}2mNothing accessioned yet. Press a to describe something you lost.${esc}0m`);
  items.forEach((item, i) => {
    const mark = i === cursor ? "▸" : " ";
    const short = item.description.length > 60 ? item.description.slice(0, 60) + "…" : item.description;
    const label = i === cursor ? `${esc}1m${short}${esc}0m` : short;
    lines.push(`${mark} ${label}  ${esc}2m${catalogueNumber(item.id, item.created_at)} · ${item.note_count} note${item.note_count === 1 ? "" : "s"}${esc}0m`);
  });
  lines.push("");
  lines.push(
    typing?.for === "description"
      ? `Describe what you lost: ${input}${esc}7m ${esc}0m`
      : `${esc}2mj/k move · enter open · a accession · q quit${esc}0m`,
  );
  out(`${esc}2J${esc}H` + lines.join("\r\n"));
}

function drawCase(): void {
  const item = caseId === undefined ? undefined : getItem(caseId);
  if (item === undefined) {
    screen = "list";
    drawList();
    return;
  }
  const vitrineIndex = vitrineOf(item.description);
  const notes = listNotes(item.id);
  const lines: string[] = [];
  lines.push(`${esc}1m${catalogueNumber(item.id, item.created_at)}${esc}0m  ${esc}2m${where}${esc}0m`);
  lines.push(`${esc}1m${VITRINES[vitrineIndex]}${esc}0m — Vitrine ${vitrineIndex + 1}`);
  lines.push("");
  lines.push(item.description);
  lines.push("");
  lines.push(`${esc}2mAccessioned ${item.created_at}${esc}0m`);
  lines.push(`${esc}2mCondition: ${conditionOf(item.id)}${esc}0m`);
  lines.push("");
  lines.push(`${esc}1mNotes${esc}0m`);
  if (notes.length === 0) lines.push(`${esc}2mNo notes yet.${esc}0m`);
  for (const n of notes) {
    lines.push(`${n.kind === "match" ? "Has the other half" : "Saw one like it"}: ${n.body}`);
    lines.push(`  ${esc}2m${n.created_at}${esc}0m`);
  }
  lines.push("");
  lines.push(
    typing?.for === "note"
      ? `${typing.kind === "match" ? "Have the other half" : "Saw one like it"}: ${input}${esc}7m ${esc}0m`
      : `${esc}2ms saw one like it · m have the other half · b back · q quit${esc}0m`,
  );
  out(`${esc}2J${esc}H` + lines.join("\r\n"));
}

function draw(): void {
  if (screen === "list") drawList();
  else drawCase();
}

process.stdin.setRawMode?.(true);
process.stdin.resume();
process.stdin.setEncoding("utf8");
draw();

process.stdin.on("data", (key: string) => {
  if (typing !== undefined) {
    if (key === "\r") {
      const value = input.trim().slice(0, 500);
      if (typing.for === "description") {
        if (value) {
          caseId = createItem(value);
          screen = "case";
        }
      } else if (value && caseId !== undefined) {
        addNote(caseId, typing.kind, value);
      }
      typing = undefined;
      input = "";
    } else if (key === "\x1b") {
      typing = undefined;
      input = "";
    } else if (key === "\x7f") input = input.slice(0, -1);
    else if (key >= " ") input += key;
    draw();
    return;
  }
  if (screen === "list") {
    if (key === "q" || key === "\x03") {
      out(`${esc}2J${esc}H`);
      process.exit(0);
    }
    const count = listItems().length;
    if (key === "j" || key === "\x1b[B") cursor = Math.min(cursor + 1, Math.max(0, count - 1));
    if (key === "k" || key === "\x1b[A") cursor = Math.max(cursor - 1, 0);
    if (key === "a") typing = { for: "description" };
    if (key === "\r") {
      const item = listItems()[cursor];
      if (item) {
        caseId = item.id;
        screen = "case";
      }
    }
  } else {
    if (key === "q" || key === "\x03") {
      out(`${esc}2J${esc}H`);
      process.exit(0);
    }
    if (key === "b" || key === "\x1b") {
      screen = "list";
      caseId = undefined;
    }
    if (key === "s") typing = { for: "note", kind: "sighting" };
    if (key === "m") typing = { for: "note", kind: "match" };
  }
  draw();
});
process.stdout.on("resize", draw);