#pragma once
// Crypto Trading types — UI state, enums, constants
// Kept separate from trading engine types to avoid coupling.

#include "ui/theme/ThemeManager.h"

#include <QColor>
#include <QString>
#include <QVector>

#include <cmath>

namespace fincept::screens::crypto {

// ── Price / size formatting ──────────────────────────────────────────────────
//
// Crypto spans ~11 orders of magnitude of unit price: BTC trades near 1e5 and
// PEPE/SHIB near 1e-8. Every price on this screen used to be rendered with a
// hard-coded `'f', 2`, so for any sub-cent pair the ticker read "$0.00", the
// order book showed twelve identical "0.00" levels, the depth-chart axis
// printed five zeros, and the ticker's own change-detection (which compared
// values rounded to 2 dp) suppressed updates entirely — the screen looked
// frozen. Scale the precision to the magnitude instead.
//
// Header-only + inline so every widget in this directory shares one
// definition without a new translation unit.

/// Decimal places appropriate for a unit price of magnitude `v`.
inline int price_decimals(double v) {
    const double a = std::fabs(v);
    if (a >= 1000.0)
        return 2;
    if (a >= 1.0)
        return 4;
    if (a >= 0.01)
        return 5;
    if (a >= 0.0001)
        return 6;
    return 8;
}

/// Plain number, no currency symbol, magnitude-appropriate precision.
inline QString format_price_plain(double v) {
    return QString::number(v, 'f', price_decimals(v));
}

/// `$`-prefixed price with magnitude-appropriate precision.
inline QString format_price_usd(double v) {
    return QStringLiteral("$") + QString::number(v, 'f', price_decimals(v));
}

/// Order/position size. Large sizes (meme-coin lots run to billions of units)
/// don't need 6 dp; small ones do.
inline QString format_size(double v) {
    const double a = std::fabs(v);
    if (a >= 1e6)
        return QString::number(v, 'f', 2);
    if (a >= 1.0)
        return QString::number(v, 'f', 4);
    return QString::number(v, 'f', 8);
}

// Order book level (UI-ready, with cumulative for depth bars)
struct OBLevel {
    double price = 0.0;
    double amount = 0.0;
    double cumulative = 0.0;
};

// Order book view mode
enum class ObViewMode { Book, Volume, Imbalance, Signals };

// Tick snapshot for order book analytics
struct TickSnapshot {
    int64_t timestamp = 0;
    double best_bid = 0.0;
    double best_ask = 0.0;
    double bid_qty[3] = {};
    double ask_qty[3] = {};
    double imbalance = 0.0;
    double rise_ratio_60 = 0.0;
};

// Trade entry for Time & Sales feed
struct TradeEntry {
    QString id;
    QString side; // "buy" | "sell"
    double price = 0.0;
    double amount = 0.0;
    int64_t timestamp = 0;
};

// Market info data (funding rate, OI, fees)
struct MarketInfoData {
    double funding_rate = 0.0;
    double mark_price = 0.0;
    double index_price = 0.0;
    double open_interest = 0.0;
    double open_interest_value = 0.0;
    double maker_fee = 0.0;
    double taker_fee = 0.0;
    int64_t next_funding_time = 0;
    bool has_data = false;
};

// Bottom panel tab
enum class BottomTab { Positions, Orders, Trades, MarketInfo, Stats, TimeSales, DepthChart };

// Trading mode
enum class TradingMode { Paper, Live };

// ── Constants ────────────────────────────────────────────────────────────────
inline constexpr int OHLCV_FETCH_COUNT = 200;
inline constexpr double DEFAULT_PAPER_BALANCE = 100000.0;
inline constexpr float TICKER_POLL_INTERVAL = 3.0f;
inline constexpr float ORDERBOOK_POLL_INTERVAL = 3.0f;
inline constexpr float WATCHLIST_POLL_INTERVAL = 15.0f;
inline constexpr float PORTFOLIO_REFRESH_INTERVAL = 1.5f;
inline constexpr float MARKET_INFO_INTERVAL = 30.0f;
inline constexpr int MAX_CANDLE_BUFFER = 500;
inline constexpr int MAX_TRADES = 200;
inline constexpr int OB_MAX_DISPLAY_LEVELS = 12;

// OB analytics thresholds
inline constexpr double OB_IMBALANCE_BUY_THRESHOLD = 0.30;
inline constexpr double OB_IMBALANCE_SELL_THRESHOLD = -0.30;
inline constexpr int OB_MAX_TICK_HISTORY = 3600;
inline constexpr int OB_TICK_CAPTURE_MS = 1000;
inline constexpr int MAX_TIME_SALES_TRADES = 200;
inline constexpr int TRADES_POLL_INTERVAL_MS = 5000;
inline constexpr int CLOCK_UPDATE_MS = 1000;

// Design System Colors — live from ThemeManager
inline QColor COLOR_BUY() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().positive);
}
inline QColor COLOR_SELL() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().negative);
}
inline QColor COLOR_DIM() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().text_secondary);
}
inline QColor COLOR_ACCENT() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().accent);
}

inline QColor BG_BASE() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().bg_base);
}
inline QColor BG_SURFACE() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().bg_surface);
}
inline QColor BG_RAISED() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().bg_raised);
}
inline QColor BG_HOVER() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().bg_hover);
}

inline QColor BORDER_DIM() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().border_dim);
}
inline QColor BORDER_MED() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().border_med);
}
inline QColor BORDER_BRIGHT() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().border_bright);
}

inline QColor TEXT_PRIMARY() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().text_primary);
}
inline QColor TEXT_SECONDARY() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().text_secondary);
}
inline QColor TEXT_TERTIARY() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().text_tertiary);
}
inline QColor TEXT_DIM() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().text_dim);
}

inline QColor COLOR_WARNING() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().warning);
}
inline QColor COLOR_INFO() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().info);
}
inline QColor COLOR_CYAN() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().cyan);
}

inline QColor ROW_ALT() {
    return QColor(fincept::ui::ThemeManager::instance().tokens().row_alt);
}

} // namespace fincept::screens::crypto