#include <cassert>
#include <iostream>
#include <string>
#include "app.hpp"

/// @brief 测试图书管理系统核心功能
/// 使用标准库 assert，不依赖第三方测试框架。
static void testAddAndFind() {
    std::cout << "[Test] testAddAndFind ... ";
    App app;
    assert(app.size() == 0);

    Book b1{"书名A", "作者A", "ISBN-001"};
    assert(app.addBook(b1));
    assert(app.size() == 1);

    // 重复 ISBN 应返回 false
    Book b2{"书名B", "作者B", "ISBN-001"};
    assert(!app.addBook(b2));
    assert(app.size() == 1);

    const Book* found = app.findByIsbn("ISBN-001");
    assert(found != nullptr);
    assert(found->getTitle() == "书名A");
    assert(found->getAuthor() == "作者A");

    // 不存在的 ISBN
    assert(app.findByIsbn("ISBN-999") == nullptr);
    std::cout << "PASSED\n";
}

/// @brief 测试删除功能
static void testRemove() {
    std::cout << "[Test] testRemove ... ";
    App app;
    app.addBook(Book{"A", "a", "X"});
    app.addBook(Book{"B", "b", "Y"});
    assert(app.size() == 2);

    // 删除存在的
    assert(app.removeBook("X"));
    assert(app.size() == 1);

    // 删除不存在的
    assert(!app.removeBook("Z"));
    assert(app.size() == 1);

    std::cout << "PASSED\n";
}

/// @brief 测试搜索功能（不区分大小写）
static void testSearch() {
    std::cout << "[Test] testSearch ... ";
    App app;
    app.addBook(Book{"C++ Primer", "Stanley Lippman", "I1"});
    app.addBook(Book{"Effective Modern C++", "Scott Meyers", "I2"});
    app.addBook(Book{"设计模式", "GoF", "I3"});

    // 按书名搜索（不区分大小写）
    auto r1 = app.search("c++");
    assert(r1.size() == 2);

    // 按作者搜索
    auto r2 = app.search("stanley");
    assert(r2.size() == 1);
    assert(r2[0].getIsbn() == "I1");

    // 无匹配
    auto r3 = app.search("不存在的书");
    assert(r3.empty());

    std::cout << "PASSED\n";
}

/// @brief 测试借出和归还
static void testBorrowReturn() {
    std::cout << "[Test] testBorrowReturn ... ";
    App app;
    app.addBook(Book{"A", "a", "I-A"});

    // 借出
    assert(app.borrowBook("I-A"));
    const Book* b = app.findByIsbn("I-A");
    assert(b != nullptr);
    assert(b->isBorrowed());

    // 重复借出应失败
    assert(!app.borrowBook("I-A"));

    // 归还
    assert(app.returnBook("I-A"));
    assert(!b->isBorrowed());

    // 重复归还应失败
    assert(!app.returnBook("I-A"));

    // 不存在的 ISBN
    assert(!app.borrowBook("I-NONE"));
    assert(!app.returnBook("I-NONE"));

    std::cout << "PASSED\n";
}

/// @brief 主测试入口
int main() {
    std::cout << "===== 图书管理系统单元测试 =====\n\n";

    testAddAndFind();
    testRemove();
    testSearch();
    testBorrowReturn();

    std::cout << "\n✅ 所有测试通过！\n";
    return 0;
}