#pragma once
#include <QString>
#include <QVector>

namespace fincept::trading {

enum class InstrumentType { EQ, FUT, CE, PE, INDEX, UNKNOWN };

inline InstrumentType parse_instrument_type(const QString& s) {
    if (s == "EQ")
        return InstrumentType::EQ;
    if (s == "FUT")
        return InstrumentType::FUT;
    if (s == "CE")
        return InstrumentType::CE;
    if (s == "PE")
        return InstrumentType::PE;
    if (s == "INDEX")
        return InstrumentType::INDEX;
    return InstrumentType::UNKNOWN;
}

inline const char* instrument_type_str(InstrumentType t) {
    switch (t) {
        case InstrumentType::EQ:
            return "EQ";
        case InstrumentType::FUT:
            return "FUT";
        case InstrumentType::CE:
            return "CE";
        case InstrumentType::PE:
            return "PE";
        case InstrumentType::INDEX:
            return "INDEX";
        default:
            return "UNKNOWN";
    }
}

/// One row in the instruments table.
struct Instrument {
    qint64 instrument_token = 0; // Broker numeric token (used in historical/market-data APIs)
    qint64 exchange_token = 0;   // Exchange-level token (broker-specific)
    QString symbol;              // Normalised symbol  e.g. "NIFTY28MAR24FUT"
    QString brsymbol;            // Broker native      e.g. "NIFTY 50 MAR24 FUT"
    QString name;                // Underlying         e.g. "NIFTY"
    QString exchange;            // Normalised exchange e.g. "NSE", "NFO", "NSE_INDEX"
    QString brexchange;          // Broker exchange     e.g. "NSE", "NFO"
    QString expiry;              // "28-MAR-24" or ""
    double strike = 0.0;         // Option strike, 0 for others
    int lot_size = 1;
    InstrumentType instrument_type = InstrumentType::UNKNOWN;
    double tick_size = 0.05;
    QString broker_id;    // "zerodha", "angelone", etc.
    QString broker_token; // Native non-numeric key (Upstox instrument_key "NSE_EQ|INE…",
                          // Samco "758960_NSE"). Empty for numeric-token brokers, which
                          // keep their value in instrument_token.

    /// Canonical DataHub topic id for this instrument: "<exchange>:<symbol>"
    /// when exchange is set, else just the symbol. Stable across brokers.
    /// Used to compose topics like "market:quote:NSE:RELIANCE".
    QString canonical_topic_id() const { return exchange.isEmpty() ? symbol : exchange + ":" + symbol; }
};

} // namespace fincept::trading