import { logging } from "../config";
import pino from "pino";

const targets: pino.TransportTargetOptions[] = [
    {
        target: "pino/file",
        level: logging.level,
        options: { destination: 1 },
    },
];

if (logging.nodeEnv === "production") {
    targets.push({
        target: "pino-roll",
        level: "info",
        options: {
            file: "/var/log/trade/data",
            frequency: "daily",
            mkdir: true,
            size: "50m",
            limit: { count: 30 },
        },
    });
}

/** 从 Bun 的 Error.stack 中解析调用位置，返回 "file:line" */
function resolveCaller(): string | undefined {
    const stack = new Error().stack;
    if (!stack) return undefined;
    const lines = stack.split("\n");
    // Bun stack format:
    //   0: "Error"
    //   1: "    at resolveCaller (...)"
    //   2: "    at mixin (...)"
    //   3-N: pino internal frames
    //   find first frame NOT matching pino/node_modules/logger.ts
    for (let i = 1; i < lines.length; i++) {
        const line = lines[i]!;
        if (
            line.includes("pino") ||
            line.includes("node_modules") ||
            line.includes("utils/logger.ts") ||
            line.includes("resolveCaller")
        ) {
            continue;
        }
        const match = line.match(/at\s+(?:.*?\s+\()?(.+?):(\d+):\d+\)?$/);
        if (match) {
            const file = match[1]!;
            const ln = match[2]!;
            // 截取项目内相对路径
            const idx = file.indexOf("/data/");
            const short = idx >= 0 ? file.slice(idx + 6) : file;
            return `${short}:${ln}`;
        }
    }
    return undefined;
}

const baseLogger = pino({
    level: logging.level,
    transport: logging.pretty
        ? {
              targets: [
                  {
                      target: "pino-pretty",
                      level: logging.level,
                      options: { colorize: true, translateTime: "SYS:HH:MM:ss" },
                  },
                  ...targets.filter((t) => t.target !== "pino/file"),
              ],
          }
        : { targets },
    base: { module: "trade-data" },
    serializers: { err: pino.stdSerializers.err },
    redact: {
        paths: ["api_key", "api_secret", "password", "apiKey", "apiSecret"],
        censor: "***",
    },
    mixin() {
        const tid = (globalThis as Record<string, unknown>).__traceId;
        const caller = resolveCaller();
        return { ...(tid ? { traceId: tid } : {}), ...(caller ? { caller } : {}) };
    },
    formatters: {
        bindings(bindings) {
            return { ...bindings, pid: undefined, hostname: undefined };
        },
    },
});

export const logger = baseLogger;

/** 设置当前异步上下文的 traceId，自动附加到后续所有日志 */
export function withTrace<T>(traceId: string, fn: () => T): T {
    (globalThis as Record<string, unknown>).__traceId = traceId;
    try {
        return fn();
    } finally {
        (globalThis as Record<string, unknown>).__traceId = undefined;
    }
}

export default logger;