//! 账务服务单元测试
//!
//! 测试 LedgerService 的核心功能

// 由于 LedgerService 依赖仓储，这里主要测试账务逻辑
// 实际的服务测试在集成测试中进行

use rust_decimal_macros::dec;

use rustjr::domain::ledger::entity::ThreeAccountResult;

// ==================== 三账校验结果测试 ====================

#[test]
fn test_three_account_balanced() {
    let result = ThreeAccountResult {
        bank_balance: dec!(100000.00),
        transit_net: dec!(5000.00),
        ledger_total: dec!(95000.00),
        is_balanced: true,
        difference: dec!(0.00),
    };

    assert!(result.is_balanced);
    assert_eq!(result.difference, dec!(0.00));
    // 验证: ledger + transit = bank
    assert_eq!(
        result.ledger_total + result.transit_net,
        result.bank_balance
    );
}

#[test]
fn test_three_account_short() {
    // 短款：银行 < 总账 + 在途
    let result = ThreeAccountResult {
        bank_balance: dec!(100000.00),
        transit_net: dec!(5000.00),
        ledger_total: dec!(100000.00),
        is_balanced: false,
        difference: dec!(-5000.00), // 银行少 5000
    };

    assert!(!result.is_balanced);
    assert!(result.difference < dec!(0.00));
}

#[test]
fn test_three_account_long() {
    // 长款：银行 > 总账 + 在途
    let result = ThreeAccountResult {
        bank_balance: dec!(110000.00),
        transit_net: dec!(5000.00),
        ledger_total: dec!(100000.00),
        is_balanced: false,
        difference: dec!(5000.00), // 银行多 5000
    };

    assert!(!result.is_balanced);
    assert!(result.difference > dec!(0.00));
}

// ==================== 扣款优先级逻辑测试 ====================

#[test]
fn test_deduction_priority_logic() {
    // 测试扣款优先级计算逻辑
    
    let personal = dec!(300.00);
    let labor = dec!(500.00);
    let to_deduct = dec!(600.00);

    // 先扣个人
    let from_personal = personal.min(to_deduct);
    let remaining = to_deduct - from_personal;
    
    // 再扣劳动
    let from_labor = labor.min(remaining);

    assert_eq!(from_personal, dec!(300.00));
    assert_eq!(from_labor, dec!(300.00));
    assert_eq!(from_personal + from_labor, to_deduct);
}

#[test]
fn test_deduction_personal_sufficient() {
    let personal = dec!(1000.00);
    let labor = dec!(500.00);
    let to_deduct = dec!(800.00);

    let from_personal = personal.min(to_deduct);
    let remaining = to_deduct - from_personal;
    let from_labor = labor.min(remaining);

    assert_eq!(from_personal, dec!(800.00));
    assert_eq!(from_labor, dec!(0.00));
}

#[test]
fn test_deduction_total_insufficient() {
    let personal = dec!(300.00);
    let labor = dec!(200.00);
    let to_deduct = dec!(600.00);

    let available = personal + labor;
    
    // 余额不足
    assert!(available < to_deduct);
}

// ==================== 在途计算逻辑测试 ====================

#[test]
fn test_transit_flow_calculation() {
    // 模拟在途流转计算
    
    let initial_personal = dec!(1000.00);
    let initial_bank = dec!(1000.00);
    let transit_amount = dec!(300.00);

    // 1. 扣款（可用 -> 在途）
    let after_deduct_personal = initial_personal - transit_amount;
    let after_deduct_bank = initial_bank; // 银行余额不变
    let in_transit = transit_amount;

    assert_eq!(after_deduct_personal, dec!(700.00));
    assert_eq!(in_transit, dec!(300.00));

    // 2. 结转（银行确认扣款）
    let final_bank = after_deduct_bank - transit_amount;
    let final_transit = in_transit - transit_amount;

    assert_eq!(final_bank, dec!(700.00));
    assert_eq!(final_transit, dec!(0.00));
}

#[test]
fn test_transit_rollback_calculation() {
    // 模拟在途回退计算
    
    let after_deduct_personal = dec!(700.00);
    let initial_bank = dec!(1000.00);
    let in_transit = dec!(300.00);

    // 回退（银行失败）
    let final_personal = after_deduct_personal + in_transit;
    let final_bank = initial_bank; // 银行余额不变
    let final_transit = dec!(0.00);

    assert_eq!(final_personal, dec!(1000.00));
    assert_eq!(final_bank, dec!(1000.00));
    assert_eq!(final_transit, dec!(0.00));
}

// ==================== 冻结逻辑测试 ====================

#[test]
fn test_freeze_from_available() {
    // 冻结只能从可用余额中冻结
    let personal = dec!(1000.00);
    let labor = dec!(500.00);
    let available = personal + labor;
    let to_freeze = dec!(800.00);

    assert!(available >= to_freeze);

    // 冻结后
    let new_personal = personal - to_freeze;
    let new_frozen = to_freeze;

    assert_eq!(new_personal, dec!(200.00));
    assert_eq!(new_frozen, dec!(800.00));
}

#[test]
fn test_frozen_cannot_be_deducted() {
    // 冻结金额不能被扣款
    let personal = dec!(200.00);
    let labor = dec!(500.00);
    let frozen = dec!(800.00);
    
    let available = personal + labor; // 不含冻结
    let to_deduct = dec!(1000.00);

    // 余额不足（虽然总额够，但可用余额不够）
    assert!(available < to_deduct);
}