#![allow(
    clippy::assertions_on_constants,
    clippy::assertions_on_result_states,
    clippy::clone_on_copy,
    clippy::decimal_literal_representation,
    clippy::doc_markdown,
    clippy::empty_line_after_doc_comments,
    clippy::field_reassign_with_default,
    clippy::get_unwrap,
    clippy::identity_op,
    clippy::inconsistent_digit_grouping,
    clippy::indexing_slicing,
    clippy::integer_division,
    clippy::len_zero,
    clippy::let_underscore_must_use,
    clippy::manual_div_ceil,
    clippy::manual_let_else,
    clippy::manual_range_contains,
    clippy::modulo_arithmetic,
    clippy::needless_range_loop,
    clippy::non_ascii_literal,
    clippy::redundant_clone,
    clippy::shadow_reuse,
    clippy::shadow_same,
    clippy::shadow_unrelated,
    clippy::single_match_else,
    clippy::str_to_string,
    clippy::string_slice,
    clippy::tests_outside_test_module,
    clippy::too_many_lines,
    clippy::unnecessary_wraps,
    clippy::unseparated_literal_suffix,
    clippy::use_debug,
    clippy::useless_vec,
    clippy::wildcard_enum_match_arm,
    clippy::else_if_without_else,
    clippy::expect_used,
    clippy::missing_const_for_fn,
    clippy::similar_names,
    clippy::type_complexity,
    clippy::collapsible_else_if,
    clippy::doc_lazy_continuation,
    clippy::items_after_test_module,
    clippy::map_clone,
    clippy::multiple_unsafe_ops_per_block,
    clippy::unwrap_or_default,
    clippy::assign_op_pattern,
    clippy::needless_borrow,
    clippy::println_empty_string,
    clippy::unnecessary_cast,
    clippy::used_underscore_binding,
    clippy::create_dir,
    clippy::implicit_saturating_sub,
    clippy::exit,
    clippy::expect_fun_call,
    clippy::too_many_arguments,
    clippy::unnecessary_map_or,
    clippy::unwrap_used,
    dead_code,
    unused_imports,
    unused_variables,
    clippy::cloned_ref_to_slice_refs,
    clippy::neg_multiply,
    clippy::while_let_loop,
    clippy::bool_assert_comparison,
    clippy::excessive_precision,
    clippy::trivially_copy_pass_by_ref,
    clippy::op_ref,
    clippy::redundant_closure,
    clippy::unnecessary_lazy_evaluations,
    clippy::if_then_some_else_none,
    clippy::unnecessary_to_owned,
    clippy::single_component_path_imports,
)]
//! Position Limit Tests for PPO
//!
//! Test-driven development (TDD) - Tests written FIRST before implementation.
//! These tests verify position limit enforcement for risk management.

use ml::ppo::position_limits::{enforce_cash_reserve, enforce_position_limit};

#[test]
fn test_position_limit_enforcement() {
    let max_position = 2.0; // Max position of ±2.0

    // Test case 1: Within limits (long direction)
    let current_position = 1.0;
    let proposed_delta = 0.5; // Would go to 1.5 (within limit)
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Position 1.0 + 0.5 = 1.5 should be allowed (max: 2.0)"
    );

    // Test case 2: Within limits (short direction)
    let current_position = -1.0;
    let proposed_delta = -0.5; // Would go to -1.5 (within limit)
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Position -1.0 + (-0.5) = -1.5 should be allowed (max: 2.0)"
    );

    // Test case 3: At limit (exactly)
    let current_position = 1.5;
    let proposed_delta = 0.5; // Would go to 2.0 (exactly at limit)
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Position 1.5 + 0.5 = 2.0 should be allowed (exactly at limit)"
    );

    // Test case 4: Exceeds limit (long)
    let current_position = 1.8;
    let proposed_delta = 0.3; // Would go to 2.1 (exceeds limit)
    assert!(
        !enforce_position_limit(current_position, proposed_delta, max_position),
        "Position 1.8 + 0.3 = 2.1 should be BLOCKED (exceeds max: 2.0)"
    );

    // Test case 5: Exceeds limit (short)
    let current_position = -1.5;
    let proposed_delta = -0.6; // Would go to -2.1 (exceeds limit)
    assert!(
        !enforce_position_limit(current_position, proposed_delta, max_position),
        "Position -1.5 + (-0.6) = -2.1 should be BLOCKED (exceeds max: 2.0)"
    );

    // Test case 6: Zero delta (always allowed)
    let current_position = 1.9;
    let proposed_delta = 0.0; // No change
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Zero delta should always be allowed"
    );

    // Test case 7: Reducing position (always allowed)
    let current_position = 2.5; // Over limit (shouldn't happen, but test defensively)
    let proposed_delta = -0.5; // Reducing position
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Reducing position should always be allowed (risk reduction)"
    );
}

#[test]
fn test_position_limit_zero_position() {
    let max_position = 2.0;
    let current_position = 0.0;

    // Going long from zero
    let proposed_delta = 1.5;
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Going long 1.5 from zero should be allowed"
    );

    // Going short from zero
    let proposed_delta = -1.5;
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Going short -1.5 from zero should be allowed"
    );

    // Exceeding limit from zero (long)
    let proposed_delta = 2.5;
    assert!(
        !enforce_position_limit(current_position, proposed_delta, max_position),
        "Going long 2.5 from zero should be BLOCKED (exceeds 2.0)"
    );

    // Exceeding limit from zero (short)
    let proposed_delta = -2.5;
    assert!(
        !enforce_position_limit(current_position, proposed_delta, max_position),
        "Going short -2.5 from zero should be BLOCKED (exceeds 2.0)"
    );
}

#[test]
fn test_position_limit_fractional_max() {
    // Test with smaller max position (e.g., 0.6 for testing)
    let max_position = 0.6;

    // Within limits
    let current_position = 0.3;
    let proposed_delta = 0.2; // Would go to 0.5 (within 0.6)
    assert!(
        enforce_position_limit(current_position, proposed_delta, max_position),
        "Position 0.3 + 0.2 = 0.5 should be allowed (max: 0.6)"
    );

    // Exceeds limits
    let current_position = 0.5;
    let proposed_delta = 0.15; // Would go to 0.65 (exceeds 0.6)
    assert!(
        !enforce_position_limit(current_position, proposed_delta, max_position),
        "Position 0.5 + 0.15 = 0.65 should be BLOCKED (exceeds max: 0.6)"
    );
}

#[test]
fn test_cash_reserve_enforcement() {
    let min_reserve_pct = 0.20; // 20% minimum cash reserve

    // Test case 1: Sufficient cash (30% reserve)
    let current_cash = 30_000.0;
    let total_portfolio = 100_000.0;
    assert!(
        enforce_cash_reserve(current_cash, total_portfolio, min_reserve_pct),
        "30% cash reserve should be allowed (min: 20%)"
    );

    // Test case 2: Exactly at minimum (20% reserve)
    let current_cash = 20_000.0;
    let total_portfolio = 100_000.0;
    assert!(
        enforce_cash_reserve(current_cash, total_portfolio, min_reserve_pct),
        "20% cash reserve should be allowed (exactly at min)"
    );

    // Test case 3: Below minimum (15% reserve)
    let current_cash = 15_000.0;
    let total_portfolio = 100_000.0;
    assert!(
        !enforce_cash_reserve(current_cash, total_portfolio, min_reserve_pct),
        "15% cash reserve should be BLOCKED (below min: 20%)"
    );

    // Test case 4: Near-zero cash
    let current_cash = 1_000.0;
    let total_portfolio = 100_000.0;
    assert!(
        !enforce_cash_reserve(current_cash, total_portfolio, min_reserve_pct),
        "1% cash reserve should be BLOCKED (below min: 20%)"
    );

    // Test case 5: 100% cash (edge case)
    let current_cash = 100_000.0;
    let total_portfolio = 100_000.0;
    assert!(
        enforce_cash_reserve(current_cash, total_portfolio, min_reserve_pct),
        "100% cash reserve should be allowed"
    );

    // Test case 6: Zero portfolio (edge case - should allow)
    let current_cash = 0.0;
    let total_portfolio = 0.0;
    assert!(
        enforce_cash_reserve(current_cash, total_portfolio, min_reserve_pct),
        "Zero portfolio should be allowed (no trading happening)"
    );
}

#[test]
fn test_cash_reserve_different_thresholds() {
    let total_portfolio = 50_000.0;

    // Test 10% threshold
    let min_reserve_10pct = 0.10;
    let cash_5pct = 2_500.0; // 5% cash
    let cash_12pct = 6_000.0; // 12% cash

    assert!(
        !enforce_cash_reserve(cash_5pct, total_portfolio, min_reserve_10pct),
        "5% cash should be BLOCKED with 10% minimum"
    );
    assert!(
        enforce_cash_reserve(cash_12pct, total_portfolio, min_reserve_10pct),
        "12% cash should be allowed with 10% minimum"
    );

    // Test 30% threshold
    let min_reserve_30pct = 0.30;
    let cash_25pct = 12_500.0; // 25% cash
    let cash_35pct = 17_500.0; // 35% cash

    assert!(
        !enforce_cash_reserve(cash_25pct, total_portfolio, min_reserve_30pct),
        "25% cash should be BLOCKED with 30% minimum"
    );
    assert!(
        enforce_cash_reserve(cash_35pct, total_portfolio, min_reserve_30pct),
        "35% cash should be allowed with 30% minimum"
    );
}

#[test]
fn test_cash_reserve_negative_values() {
    let min_reserve_pct = 0.20;
    let total_portfolio = 100_000.0;

    // Negative cash (margin/leverage scenario)
    let negative_cash = -10_000.0;
    assert!(
        !enforce_cash_reserve(negative_cash, total_portfolio, min_reserve_pct),
        "Negative cash should always be BLOCKED"
    );
}