//! Centralized constants for the Dew Finance contracts
//!
//! This module contains all magic numbers used throughout the codebase,
//! organized by category for better maintainability and documentation.

use near_sdk::Gas;

// ============================================================================
// BASIS POINTS CONSTANTS
// ============================================================================

/// Basis points divisor (10,000 = 100%)
pub const BASIS_POINTS_DIVISOR: u128 = 10_000;

/// Basis points divisor as u16 (10,000 = 100%)
pub const BASIS_POINTS_DIVISOR_U16: u16 = 10_000;

/// 100% in basis points
pub const PERCENT_100_BPS: u16 = 10_000;

// ============================================================================
// MICRO PERCENT CONSTANTS
// ============================================================================

/// Nano percent divisor (100,000,000,000 = 100%)
/// Used for higher precision measurements like price deviations
pub const NANO_PERCENT_DIVISOR: u64 = 100_000_000_000;

/// 100% in nano percent
pub const PERCENT_100_NANO: u64 = 100_000_000_000;

// ============================================================================
// FEE LIMIT CONSTANTS
// ============================================================================

/// Maximum deposit fee in basis points (20%)
pub const MAX_DEPOSIT_FEE_BPS: u16 = 2_000;

/// Maximum withdrawal fee in basis points (20%)
pub const MAX_WITHDRAWAL_FEE_BPS: u16 = 2_000;

/// Maximum protocol cut in basis points (100%)
pub const MAX_PROTOCOL_CUT_BPS: u16 = 10_000;

// ============================================================================
// TIME CONSTANTS (NANOSECONDS)
// ============================================================================

/// Nanoseconds per second
pub const NANOSECONDS_PER_SECOND: u128 = 1_000_000_000;

/// Nanoseconds per minute
pub const NANOSECONDS_PER_MINUTE: u128 = 60 * NANOSECONDS_PER_SECOND;

/// Nanoseconds per hour
pub const NANOSECONDS_PER_HOUR: u128 = 3600 * NANOSECONDS_PER_SECOND;

/// Nanoseconds per day
pub const NANOSECONDS_PER_DAY: u128 = 24 * NANOSECONDS_PER_HOUR;

/// Nanoseconds per year (365 days)
pub const NANOSECONDS_PER_YEAR: u128 = 365 * NANOSECONDS_PER_DAY;

/// Nanoseconds per year (365.25 days for leap year calculations)
pub const NANOSECONDS_PER_YEAR_LEAP: u128 = 365_25 * NANOSECONDS_PER_DAY / 100;

/// Nanoseconds in one week
pub const NANOSECONDS_PER_WEEK: u128 = 7 * NANOSECONDS_PER_DAY;

/// Default proposal expiry time (24 hours in nanoseconds)
pub const DEFAULT_PROPOSAL_EXPIRY_TIME_NS: u128 = NANOSECONDS_PER_DAY;

// ============================================================================
// PRECISION CONSTANTS
// ============================================================================

/// High precision constant for annualized return calculations (10^8)
pub const HIGH_PRECISION: u128 = 100_000_000;

// ============================================================================
// DECIMAL LIMITS
// ============================================================================

/// Maximum share price decimals
pub const MAX_SHARE_PRICE_DECIMALS: u8 = 30;

/// Maximum extra decimals
pub const MAX_EXTRA_DECIMALS: u8 = 30;

/// Maximum combined decimals (U256 limit)
pub const MAX_COMBINED_DECIMALS: u8 = 38;

/// Minimum share price decimals
pub const MIN_SHARE_PRICE_DECIMALS: u8 = 6;

/// Maximum share price decimals for kernel config
pub const MAX_SHARE_PRICE_DECIMALS_KERNEL: u8 = 18;

// ============================================================================
// DEFAULT CONFIGURATION VALUES
// ============================================================================

/// Default maximum sync deposit amount (100,000 tokens with 6 decimals)
pub const DEFAULT_MAX_SYNC_DEPOSIT: u128 = 100_000 * 1_000_000;

/// Maximum sync redeem ratio in basis points (100%)
pub const MAX_SYNC_REDEEM_RATIO_BPS: u16 = 10_000;

/// Default share price decimals
pub const DEFAULT_SHARE_PRICE_DECIMALS: u8 = 8;

/// Default extra decimals
pub const DEFAULT_EXTRA_DECIMALS: u8 = 18;

/// Default crystallization interval (1 week)
pub const DEFAULT_CRYSTALLIZATION_INTERVAL_NS: u128 = NANOSECONDS_PER_WEEK;

// ============================================================================
// GAS CONSTANTS
// ============================================================================

/// Gas for callback operations (20 TGas)
pub const GAS_FOR_CALLBACK: Gas = Gas::from_tgas(20);

/// Gas for token transfer operations (10 TGas)
pub const GAS_FOR_TOKEN_TRANSFER: Gas = Gas::from_tgas(10);

/// Gas for token transfer_call operations (30 TGas)
/// Transfer_call requires more gas as it involves cross-contract callbacks
pub const GAS_FOR_TOKEN_TRANSFER_CALL: Gas = Gas::from_tgas(30);

// ============================================================================
// SHARE PRICE STALENESS CONSTANTS
// ============================================================================

/// Default maximum share price staleness (1 hour in nanoseconds)
pub const DEFAULT_MAX_SHARE_PRICE_STALENESS_NS: u128 = NANOSECONDS_PER_HOUR;

/// Minimum share price staleness (1 minute)
pub const MIN_SHARE_PRICE_STALENESS_NS: u128 = NANOSECONDS_PER_MINUTE;

/// Maximum share price staleness (1 day)
pub const MAX_SHARE_PRICE_STALENESS_NS: u128 = NANOSECONDS_PER_WEEK;