import fs from "fs";
import path from "path";
import os from "os";
import { log } from "./logger.js";
const CONFIG_FILENAMES = ["matrix.json", "matrix.jsonc"];
function mergeDefaults(raw, envOverrides) {
    const base = {
        homeserver: envOverrides.homeserver || "https://matrix.org",
        userId: envOverrides.userId,
        accessToken: envOverrides.accessToken,
        password: envOverrides.password,
        deviceId: envOverrides.deviceId || "opencode-matrix-plugin",
        autoJoin: envOverrides.autoJoin !== false,
        triggerPatterns: envOverrides.triggerPatterns || ["!oc "],
        ignoreRooms: envOverrides.ignoreRooms || [],
        ignoreUsers: envOverrides.ignoreUsers || [],
        allowedUsers: envOverrides.allowedUsers || [],
        formatHtml: envOverrides.formatHtml || false,
        threadIsolation: envOverrides.threadIsolation !== false,
        respondToThreadReplies: envOverrides.respondToThreadReplies !== false,
        rateLimitSeconds: envOverrides.rateLimitSeconds || 5,
        botName: envOverrides.botName || "opencode",
        storagePath: envOverrides.storagePath,
    };
    if (!raw)
        return base;
    return {
        homeserver: raw.homeserver || base.homeserver,
        userId: raw.userId || base.userId,
        accessToken: raw.accessToken || base.accessToken,
        password: raw.password || base.password,
        deviceId: raw.deviceId || base.deviceId,
        autoJoin: raw.autoJoin !== undefined ? raw.autoJoin : base.autoJoin,
        triggerPatterns: raw.triggerPatterns || base.triggerPatterns,
        ignoreRooms: raw.ignoreRooms || base.ignoreRooms,
        ignoreUsers: raw.ignoreUsers || base.ignoreUsers,
        allowedUsers: raw.allowedUsers || base.allowedUsers,
        formatHtml: raw.formatHtml !== undefined ? raw.formatHtml : base.formatHtml,
        threadIsolation: raw.threadIsolation !== undefined ? raw.threadIsolation : base.threadIsolation,
        respondToThreadReplies: raw.respondToThreadReplies !== undefined ? raw.respondToThreadReplies : base.respondToThreadReplies,
        rateLimitSeconds: raw.rateLimitSeconds || base.rateLimitSeconds,
        botName: raw.botName || base.botName,
        storagePath: raw.storagePath || base.storagePath,
    };
}
function tryReadConfig(dir) {
    for (const filename of CONFIG_FILENAMES) {
        const filepath = path.join(dir, filename);
        if (!fs.existsSync(filepath))
            continue;
        try {
            const content = fs.readFileSync(filepath, "utf-8");
            const parsed = JSON.parse(content);
            if (typeof parsed === "object" && parsed !== null) {
                return parsed;
            }
        }
        catch (e) {
            log(`Failed to read config: ${filepath}`);
            return null;
        }
    }
    return null;
}
function findProjectConfigDir() {
    let dir = process.cwd();
    const root = path.parse(dir).root;
    while (dir && dir !== root) {
        const opencodeDir = path.join(dir, ".opencode");
        if (fs.existsSync(opencodeDir) && fs.statSync(opencodeDir).isDirectory()) {
            return opencodeDir;
        }
        dir = path.dirname(dir);
    }
    const currentOpencode = path.join(process.cwd(), ".opencode");
    if (fs.existsSync(currentOpencode) && fs.statSync(currentOpencode).isDirectory()) {
        return currentOpencode;
    }
    return null;
}
function findGlobalConfigDir() {
    return path.join(os.homedir(), ".config", "opencode");
}
const DEFAULT_CONFIG_CONTENT = JSON.stringify({
    homeserver: "https://matrix.org",
    userId: "",
    accessToken: "",
    password: "",
    deviceId: "opencode-matrix-plugin",
    autoJoin: true,
    triggerPatterns: ["!oc "],
    ignoreRooms: [],
    ignoreUsers: [],
    allowedUsers: [],
    formatHtml: false,
    threadIsolation: true,
    respondToThreadReplies: true,
    rateLimitSeconds: 5,
    botName: "opencode",
    enabled: true,
}, null, 2);
async function ensureGlobalConfig(globalConfigDir) {
    log(`ensureGlobalConfig called, dir=${globalConfigDir}`);
    for (const filename of CONFIG_FILENAMES) {
        const filepath = path.join(globalConfigDir, filename);
        if (fs.existsSync(filepath)) {
            log(`config already exists: ${filepath}`);
            return filepath;
        }
    }
    log("no config found, creating default");
    try {
        log("mkdirSync globalConfigDir");
        fs.mkdirSync(globalConfigDir, { recursive: true });
        const filepath = path.join(globalConfigDir, "matrix.json");
        log("writing file: " + filepath);
        fs.writeFileSync(filepath, DEFAULT_CONFIG_CONTENT, { mode: 0o600 });
        log("Created default config: " + filepath);
        return filepath;
    }
    catch (err) {
        log("Failed to create default config: " + err);
        return null;
    }
}
export async function loadConfig(pluginOptions = {}) {
    pluginOptions = pluginOptions || {};
    const envOverrides = {
        homeserver: process.env.MATRIX_HOMESERVER,
        userId: process.env.MATRIX_USER_ID,
        accessToken: process.env.MATRIX_ACCESS_TOKEN,
        password: process.env.MATRIX_PASSWORD,
        deviceId: process.env.MATRIX_DEVICE_ID || undefined,
        triggerPatterns: process.env.MATRIX_TRIGGER ? [process.env.MATRIX_TRIGGER] : undefined,
        allowedUsers: process.env.MATRIX_ALLOWED_USERS ? process.env.MATRIX_ALLOWED_USERS.split(",").map(s => s.trim()).filter(Boolean) : undefined,
        storagePath: process.env.MATRIX_STORAGE_PATH,
    };
    const projectConfigDir = findProjectConfigDir();
    log(`projectConfigDir=${projectConfigDir}`);
    let rawConfig = null;
    let configPath = null;
    if (projectConfigDir) {
        const projectConfig = tryReadConfig(projectConfigDir);
        log(`projectConfig=${projectConfig ? "found" : "null"}`);
        if (projectConfig) {
            rawConfig = projectConfig;
            const foundFile = CONFIG_FILENAMES.find((f) => fs.existsSync(path.join(projectConfigDir, f)));
            if (foundFile) {
                configPath = path.join(projectConfigDir, foundFile);
            }
        }
    }
    const globalConfigDir = findGlobalConfigDir();
    const globalConfig = tryReadConfig(globalConfigDir);
    log(`globalConfigDir=${globalConfigDir}`);
    log(`globalConfig=${globalConfig ? "found" : "null"}`);
    log(`rawConfig=${rawConfig ? "found" : "null"}`);
    if (!rawConfig && globalConfig) {
        rawConfig = globalConfig;
        configPath = path.join(globalConfigDir, "matrix.json");
        log("using global config");
    }
    if (!rawConfig) {
        log("no config found, calling ensureGlobalConfig");
        const createdPath = await ensureGlobalConfig(globalConfigDir);
        log(`ensureGlobalConfig returned=${createdPath}`);
        if (createdPath) {
            configPath = createdPath;
        }
    }
    if (rawConfig && rawConfig.enabled === false) {
        return {
            options: { ...mergeDefaults(null, envOverrides), homeserver: "" },
            configPath,
        };
    }
    const merged = mergeDefaults(rawConfig, envOverrides);
    const finalOptions = {
        homeserver: pluginOptions.homeserver || merged.homeserver,
        userId: pluginOptions.userId || merged.userId,
        accessToken: pluginOptions.accessToken || merged.accessToken,
        password: pluginOptions.password || merged.password,
        deviceId: pluginOptions.deviceId || merged.deviceId,
        autoJoin: pluginOptions.autoJoin !== undefined ? pluginOptions.autoJoin : merged.autoJoin,
        triggerPatterns: pluginOptions.triggerPatterns || merged.triggerPatterns,
        ignoreRooms: pluginOptions.ignoreRooms || merged.ignoreRooms,
        ignoreUsers: pluginOptions.ignoreUsers || merged.ignoreUsers,
        allowedUsers: pluginOptions.allowedUsers || merged.allowedUsers,
        formatHtml: pluginOptions.formatHtml !== undefined ? pluginOptions.formatHtml : merged.formatHtml,
        threadIsolation: pluginOptions.threadIsolation !== undefined ? pluginOptions.threadIsolation : merged.threadIsolation,
        respondToThreadReplies: pluginOptions.respondToThreadReplies !== undefined ? pluginOptions.respondToThreadReplies : merged.respondToThreadReplies,
        rateLimitSeconds: pluginOptions.rateLimitSeconds || merged.rateLimitSeconds,
        botName: pluginOptions.botName || merged.botName,
        storagePath: pluginOptions.storagePath || merged.storagePath,
    };
    return { options: finalOptions, configPath };
}