import fs from "fs";
import path from "path";
const SESSION_MAP_FILE = path.join(process.env.HOME || "/tmp", ".opencode-matrix-sessions.json");
console.log(`[SessionManager] SESSION_MAP_FILE=${SESSION_MAP_FILE}`);
function loadSessionMap() {
    const result = new Map();
    try {
        if (fs.existsSync(SESSION_MAP_FILE)) {
            const data = JSON.parse(fs.readFileSync(SESSION_MAP_FILE, "utf-8"));
            console.log(`[SessionManager] Loaded ${data.length} sessions from ${SESSION_MAP_FILE}`);
            if (Array.isArray(data)) {
                for (const entry of data) {
                    const key = `${entry.matrixRoomId}::${entry.threadRootId}`;
                    result.set(key, entry);
                }
            }
        }
        else {
            console.log(`[SessionManager] File not found: ${SESSION_MAP_FILE}`);
        }
    }
    catch (e) {
        console.log(`[SessionManager] Error loading: ${e}`);
    }
    return result;
}
function saveSessionMap(map) {
    try {
        const entries = [];
        for (const [, entry] of map) {
            entries.push(entry);
        }
        fs.writeFileSync(SESSION_MAP_FILE, JSON.stringify(entries, null, 2));
    }
    catch (e) {
        // ignore
    }
}
export class SessionManager {
    sessions = new Map();
    persistentMap;
    activeQueries = new Map();
    rateLimitMs;
    lastRequestByUser = new Map();
    processedEvents = new Set();
    constructor(rateLimitSeconds) {
        this.rateLimitMs = (rateLimitSeconds || 5) * 1000;
        this.persistentMap = loadSessionMap();
        // Restore sessions from persistent map
        for (const [key, entry] of this.persistentMap) {
            const [matrixRoomId, threadRootId] = key.split("::");
            this.sessions.set(key, {
                matrixRoomId,
                threadRootId,
                opencodeSessionId: entry.opencodeSessionId,
                eventId: "",
                isActive: false,
                messageCount: entry.messageCount,
                inputChars: entry.inputChars,
                outputChars: entry.outputChars,
                lastActivity: entry.lastActivity,
                lastEventIds: new Map(),
            });
        }
    }
    getSessionKey(matrixRoomId, threadRootId) {
        return `${matrixRoomId}::${threadRootId}`;
    }
    getOrCreateSession(matrixRoomId, threadRootId, eventId) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        let session = this.sessions.get(key);
        if (!session) {
            session = {
                matrixRoomId,
                threadRootId,
                opencodeSessionId: "",
                eventId,
                isActive: false,
                messageCount: 0,
                inputChars: 0,
                outputChars: 0,
                lastActivity: Date.now(),
                lastEventIds: new Map(),
            };
            this.sessions.set(key, session);
        }
        return session;
    }
    getSession(matrixRoomId, threadRootId) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        return this.sessions.get(key);
    }
    removeSession(matrixRoomId, threadRootId) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        this.sessions.delete(key);
        this.persistentMap.delete(key);
        saveSessionMap(this.persistentMap);
        this.activeQueries.delete(key);
    }
    has(matrixRoomId, threadRootId) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        return this.sessions.has(key);
    }
    hasActiveQuery(matrixRoomId, threadRootId) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        return this.activeQueries.has(key);
    }
    markQueryActive(matrixRoomId, threadRootId, abortFn) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        this.activeQueries.set(key, abortFn);
        return () => this.activeQueries.delete(key);
    }
    isRateLimited(sender) {
        const now = Date.now();
        const last = this.lastRequestByUser.get(sender);
        if (last && now - last < this.rateLimitMs) {
            return true;
        }
        this.lastRequestByUser.set(sender, now);
        return false;
    }
    isDuplicateEvent(eventId) {
        if (!eventId)
            return false;
        if (this.processedEvents.has(eventId))
            return true;
        if (this.processedEvents.size > 10000) {
            this.processedEvents.clear();
        }
        this.processedEvents.add(eventId);
        return false;
    }
    saveSession(matrixRoomId, threadRootId, opencodeSessionId) {
        const key = this.getSessionKey(matrixRoomId, threadRootId);
        const session = this.sessions.get(key);
        if (session) {
            const entry = {
                matrixRoomId,
                threadRootId,
                opencodeSessionId,
                messageCount: session.messageCount,
                inputChars: session.inputChars,
                outputChars: session.outputChars,
                lastActivity: session.lastActivity,
            };
            this.persistentMap.set(key, entry);
            saveSessionMap(this.persistentMap);
        }
    }
    syncWithOpenCode(openCodeSessionIds) {
        const toDelete = [];
        for (const [, entry] of this.persistentMap) {
            if (!openCodeSessionIds.has(entry.opencodeSessionId)) {
                toDelete.push(`${entry.matrixRoomId}::${entry.threadRootId}`);
            }
        }
        for (const key of toDelete) {
            this.persistentMap.delete(key);
            this.sessions.delete(key);
            this.activeQueries.delete(key);
        }
        if (toDelete.length > 0) {
            saveSessionMap(this.persistentMap);
        }
    }
}