import { findTask, onEach, state } from "./state.js";
const composerTexts = new Map();
const composerImages = new Map();
const sending = new Set();
const lostImages = new Map();
const checked = new Map();
const texts = new Map();
let storeKey;
let timer = 0;
export function loadDrafts() {
    storeKey = `byre.drafts.${state.me.login}`;
    const saved = readSaved(storeKey);
    for (const [key, d] of Object.entries(saved.composer)) {
        if (d.text) {
            composerTexts.set(key, d.text);
        }
        if (d.images > 0) {
            lostImages.set(key, d.images);
        }
    }
    for (const [id, opts] of Object.entries(saved.checked)) {
        checked.set(id, opts);
    }
    for (const [id, text] of Object.entries(saved.texts)) {
        texts.set(id, text);
    }
    prune();
    onEach(["tasks", "inbox"], prune);
    addEventListener("pagehide", flushDrafts);
}
function readSaved(key) {
    const out = { composer: {}, checked: {}, texts: {} };
    let raw;
    try {
        raw = JSON.parse(localStorage.getItem(key) ?? "{}");
    }
    catch (err) {
        console.error("read drafts", err);
        return out;
    }
    if (!isRecord(raw)) {
        return out;
    }
    for (const [k, v] of Object.entries(isRecord(raw["composer"]) ? raw["composer"] : {})) {
        if (isRecord(v) && typeof v["text"] === "string" && typeof v["images"] === "number") {
            out.composer[k] = { text: v["text"], images: v["images"] };
        }
    }
    for (const [k, v] of Object.entries(isRecord(raw["checked"]) ? raw["checked"] : {})) {
        if (Array.isArray(v) && v.every((o) => typeof o === "string")) {
            out.checked[k] = v;
        }
    }
    for (const [k, v] of Object.entries(isRecord(raw["texts"]) ? raw["texts"] : {})) {
        if (typeof v === "string") {
            out.texts[k] = v;
        }
    }
    return out;
}
function isRecord(v) {
    return typeof v === "object" && v !== null && !Array.isArray(v);
}
function prune() {
    let changed = false;
    for (const map of [composerTexts, composerImages, lostImages]) {
        for (const key of map.keys()) {
            const taskId = key.replace(/^message:/, "");
            if (taskId !== "lead" && findTask(taskId)?.status !== "active") {
                map.delete(key);
                changed = true;
            }
        }
    }
    for (const map of [checked, texts]) {
        for (const id of map.keys()) {
            if (!state.inbox.some((i) => i.id === id)) {
                map.delete(id);
                changed = true;
            }
        }
    }
    if (changed) {
        save();
    }
}
function save() {
    clearTimeout(timer);
    timer = setTimeout(flushDrafts, 400);
}
export function flushDrafts() {
    clearTimeout(timer);
    timer = 0;
    if (!storeKey) {
        return;
    }
    const out = { composer: {}, checked: Object.fromEntries(checked), texts: Object.fromEntries(texts) };
    const keys = new Set([...composerTexts.keys(), ...composerImages.keys(), ...[...sending].map((s) => s.key), ...lostImages.keys()]);
    for (const key of keys) {
        const inFlight = [...sending].filter((s) => s.key === key);
        const text = [...inFlight.map((s) => s.text), composerTexts.get(key) ?? ""].filter((t) => t).join("\n\n");
        const images = (composerImages.get(key) ?? 0) + inFlight.reduce((n, s) => n + s.images, 0) + (lostImages.get(key) ?? 0);
        if (text || images > 0) {
            out.composer[key] = { text, images };
        }
    }
    try {
        localStorage.setItem(storeKey, JSON.stringify(out));
    }
    catch (err) {
        console.error("save drafts", err);
    }
}
export function composerText(key) {
    return composerTexts.get(key) ?? "";
}
export function setComposerText(key, text) {
    if (text) {
        composerTexts.set(key, text);
    }
    else {
        composerTexts.delete(key);
    }
    save();
}
export function setComposerImages(key, n) {
    if (n > 0) {
        composerImages.set(key, n);
    }
    else {
        composerImages.delete(key);
    }
    save();
}
export function lostImageCount(key) {
    return lostImages.get(key) ?? 0;
}
export function forgetLostImages(key) {
    lostImages.delete(key);
    save();
}
export function startSend(key, text, images) {
    const send = { key, text, images };
    sending.add(send);
    composerTexts.delete(key);
    return send;
}
export function endSend(send, ok) {
    sending.delete(send);
    if (ok) {
        lostImages.delete(send.key);
    }
    else {
        const text = [send.text, composerTexts.get(send.key) ?? ""].filter((t) => t).join("\n\n");
        if (text) {
            composerTexts.set(send.key, text);
        }
    }
    flushDrafts();
}
export function checkedAnswer(id) {
    return checked.get(id) ?? [];
}
export function setCheckedAnswer(id, options) {
    checked.set(id, options);
    save();
}
export function hasTextAnswer(id) {
    return texts.has(id);
}
export function textAnswer(id) {
    return texts.get(id);
}
export function setTextAnswer(id, text) {
    texts.set(id, text);
    save();
}
export function dropTextAnswer(id) {
    texts.delete(id);
    save();
}
export function clearAnswer(id) {
    checked.delete(id);
    texts.delete(id);
    flushDrafts();
}
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