#include "app.hpp"

#include <cassert>
#include <cstdio>
#include <iostream>

/**
 * @brief 测试创建任务和列表查询。
 */
static void test_create_and_list() {
    TodoService service("test_todos.json");
    assert(service.get_all().empty());

    auto item = service.create("\u6D4B\u8BD5\u4EFB\u52A1", "\u6D4B\u8BD5\u63CF\u8FF0");
    assert(item.id == 1);
    assert(item.title == "\u6D4B\u8BD5\u4EFB\u52A1");
    assert(item.description == "\u6D4B\u8BD5\u63CF\u8FF0");
    assert(item.completed == false);

    assert(service.get_all().size() == 1);
    std::cout << "\u2713 test_create_and_list passed\n";
}

/**
 * @brief 测试按 ID 查询任务。
 */
static void test_get_by_id() {
    TodoService service("test_todos.json");
    service.create("\u4EFB\u52A1A");
    service.create("\u4EFB\u52A1B");

    auto found = service.get_by_id(1);
    assert(found.has_value());
    assert(found->title == "\u4EFB\u52A1A");

    auto not_found = service.get_by_id(999);
    assert(!not_found.has_value());
    std::cout << "\u2713 test_get_by_id passed\n";
}

/**
 * @brief 测试更新任务（全字段更新和部分更新）。
 */
static void test_update() {
    TodoService service("test_todos.json");
    auto item = service.create("\u539F\u6807\u9898", "\u539F\u63CF\u8FF0");

    // 全字段更新
    auto updated = service.update(item.id, "\u65B0\u6807\u9898",
                                  "\u65B0\u63CF\u8FF0", true);
    assert(updated.has_value());
    assert(updated->title == "\u65B0\u6807\u9898");
    assert(updated->description == "\u65B0\u63CF\u8FF0");
    assert(updated->completed == true);

    // 部分更新（仅修改完成状态）
    auto partial = service.update(item.id, std::nullopt, std::nullopt, false);
    assert(partial.has_value());
    assert(partial->title == "\u65B0\u6807\u9898");
    assert(partial->completed == false);
    std::cout << "\u2713 test_update passed\n";
}

/**
 * @brief 测试删除任务。
 */
static void test_delete() {
    TodoService service("test_todos.json");
    service.create("\u5F85\u5220\u9664");
    assert(service.get_all().size() == 1);

    bool result = service.delete_item(1);
    assert(result == true);
    assert(service.get_all().empty());

    // 删除不存在的 ID
    result = service.delete_item(999);
    assert(result == false);
    std::cout << "\u2713 test_delete passed\n";
}

/**
 * @brief 测试 JSON 文件持久化：构造→写入→重新加载→验证。
 */
static void test_persistence() {
    const char* persist_file = "test_persist.json";

    // 创建数据并写入文件
    {
        TodoService service(persist_file);
        service.create("\u6301\u4E45\u5316\u6D4B\u8BD5");
        service.create("\u7B2C\u4E8C\u4E2A\u4EFB\u52A1");
    }

    // 重新加载并验证
    {
        TodoService service(persist_file);
        assert(service.get_all().size() == 2);
        assert(service.get_by_id(1).has_value());
        assert(service.get_by_id(2).has_value());
    }

    std::remove(persist_file);
    std::cout << "\u2713 test_persistence passed\n";
}

/**
 * @brief 测试入口。
 */
int main() {
    // 清理可能残留的测试文件
    std::remove("test_todos.json");

    test_create_and_list();
    test_get_by_id();
    test_update();
    test_delete();
    test_persistence();

    // 最终清理
    std::remove("test_todos.json");

    std::cout << "\n\u2713 \u2713 \u2713 \u6240\u6709\u6D4B\u8BD5\u901A\u8FC7\uFF01\n";
    return 0;
}