import assert from 'node:assert/strict';
import { randomUUID } from 'node:crypto';
import type { AddressInfo } from 'node:net';
import type { Database } from '@atlas/database';
import type { NestExpressApplication } from '@nestjs/platform-express';
import { afterAll, beforeAll, describe, it } from 'vitest';
import { DATABASE } from '../src/database/database.module.js';
import { createApplication } from '../src/main.js';

type SuccessResponse<T> = { data: T };
type ErrorResponse = {
    error: {
        code: string;
        message: string;
        request_id: string;
        details?: Array<{ field: string; code: string; message: string }>;
    };
};
type SessionPayload = {
    access_token: string;
    access_token_expires_in: number;
    user: { id: string; email: string };
    workspace: { id: string; name: string; role: string };
};

const password = 'correct-horse-battery-staple-123';
const testUsers: Array<{ userId: string; workspaceId: string }> = [];
let app: NestExpressApplication;
let database: Database;
let baseUrl: string;

function email(label: string): string {
    return `${label}-${randomUUID()}@example.test`;
}

async function request(
    path: string,
    init: RequestInit = {},
): Promise<{ response: Response; body: unknown }> {
    const response = await fetch(`${baseUrl}${path}`, {
        ...init,
        headers: {
            'Content-Type': 'application/json',
            ...init.headers,
        },
    });
    return {
        response,
        body: response.status === 204 ? undefined : await response.json(),
    };
}

function expectSuccess<T>(body: unknown): SuccessResponse<T> {
    assert.ok(body && typeof body === 'object' && 'data' in body);
    return body as SuccessResponse<T>;
}

function expectError(body: unknown): ErrorResponse {
    assert.ok(body && typeof body === 'object' && 'error' in body);
    return body as ErrorResponse;
}

function refreshCookie(response: Response): string {
    const cookie = response.headers.get('set-cookie');
    assert.ok(cookie, '认证成功响应必须写入 refresh cookie');
    assert.match(cookie, /HttpOnly/i);
    const match = cookie.match(/atlas_refresh=[^;]+/);
    assert.ok(match, '响应必须包含 atlas_refresh cookie');
    return match[0];
}

describe('认证 HTTP 集成测试', () => {
    beforeAll(async () => {
        Object.assign(process.env, {
            NODE_ENV: 'test',
            SWAGGER_ENABLED: 'false',
            AUTH_LOGIN_IP_LIMIT: '100',
            AUTH_LOGIN_EMAIL_LIMIT: '2',
            AUTH_REGISTER_IP_LIMIT: '100',
            AUTH_REGISTER_EMAIL_LIMIT: '100',
            AUTH_REFRESH_IP_LIMIT: '100',
        });
        const application = await createApplication();
        app = application.app;
        database = app.get<Database>(DATABASE);
        await app.listen(0, '127.0.0.1');
        const address = app.getHttpServer().address() as AddressInfo;
        baseUrl = `http://127.0.0.1:${address.port}`;
    });

    afterAll(async () => {
        for (const user of testUsers) {
            await database.query(
                'DELETE FROM atlas.workspace_memberships WHERE user_id = $1',
                [user.userId],
            );
            await database.query('DELETE FROM atlas.workspaces WHERE id = $1', [
                user.workspaceId,
            ]);
            await database.query('DELETE FROM atlas.users WHERE id = $1', [
                user.userId,
            ]);
        }
        await app.close();
    });

    it('健康与 readiness 端点保持公开', async () => {
        const health = await request('/health');
        assert.equal(health.response.status, 200);
        assert.deepEqual(health.body, { status: 'ok', service: 'api' });

        const readiness = await request('/ready');
        assert.equal(readiness.response.status, 200);
        assert.deepEqual(readiness.body, { status: 'ready', service: 'api' });
    });

    it('注册、重复邮箱和参数校验遵守响应契约', async () => {
        const registrationEmail = email('register');
        const registration = await request('/api/auth/register', {
            method: 'POST',
            body: JSON.stringify({
                email: registrationEmail,
                password,
                password_confirmation: password,
                display_name: '集成测试用户',
            }),
        });
        assert.equal(registration.response.status, 201);
        const payload = expectSuccess<SessionPayload>(registration.body).data;
        assert.equal(payload.user.email, registrationEmail);
        assert.equal(payload.workspace.role, 'owner');
        assert.ok(payload.access_token);
        assert.ok(payload.access_token_expires_in > 0);
        refreshCookie(registration.response);
        testUsers.push({
            userId: payload.user.id,
            workspaceId: payload.workspace.id,
        });

        const duplicate = await request('/api/auth/register', {
            method: 'POST',
            body: JSON.stringify({
                email: registrationEmail,
                password,
                password_confirmation: password,
            }),
        });
        assert.equal(duplicate.response.status, 409);
        assert.equal(
            expectError(duplicate.body).error.code,
            'EMAIL_ALREADY_REGISTERED',
        );

        const invalid = await request('/api/auth/register', {
            method: 'POST',
            body: JSON.stringify({
                email: 'not-an-email',
                password,
                password_confirmation: password,
            }),
        });
        assert.equal(invalid.response.status, 422);
        assert.equal(expectError(invalid.body).error.code, 'VALIDATION_FAILED');
    });

    it('登录、刷新、退出和当前用户读取可形成完整会话闭环', async () => {
        const accountEmail = email('session');
        const registration = await request('/api/auth/register', {
            method: 'POST',
            body: JSON.stringify({
                email: accountEmail,
                password,
                password_confirmation: password,
            }),
        });
        const registered = expectSuccess<SessionPayload>(
            registration.body,
        ).data;
        testUsers.push({
            userId: registered.user.id,
            workspaceId: registered.workspace.id,
        });

        const login = await request('/api/auth/login', {
            method: 'POST',
            body: JSON.stringify({ email: accountEmail, password }),
        });
        assert.equal(login.response.status, 200);
        const loggedIn = expectSuccess<SessionPayload>(login.body).data;
        const loginRefreshCookie = refreshCookie(login.response);

        const currentUser = await request('/api/auth/me', {
            headers: { Authorization: `Bearer ${loggedIn.access_token}` },
        });
        assert.equal(currentUser.response.status, 200);
        const me = expectSuccess<{
            user: { id: string };
            workspace: { id: string };
        }>(currentUser.body).data;
        assert.equal(me.user.id, registered.user.id);
        assert.equal(me.workspace.id, registered.workspace.id);

        const refresh = await request('/api/auth/refresh', {
            method: 'POST',
            headers: { Cookie: loginRefreshCookie },
        });
        assert.equal(refresh.response.status, 200);
        const refreshed = expectSuccess<{
            access_token: string;
            access_token_expires_in: number;
        }>(refresh.body).data;
        assert.ok(refreshed.access_token);
        const refreshedCookie = refreshCookie(refresh.response);

        const reusedRefresh = await request('/api/auth/refresh', {
            method: 'POST',
            headers: { Cookie: loginRefreshCookie },
        });
        assert.equal(reusedRefresh.response.status, 401);
        assert.equal(
            expectError(reusedRefresh.body).error.code,
            'SESSION_EXPIRED',
        );

        const logout = await request('/api/auth/logout', {
            method: 'POST',
            headers: {
                Authorization: `Bearer ${refreshed.access_token}`,
                Cookie: refreshedCookie,
            },
        });
        assert.equal(logout.response.status, 204);
        assert.equal(logout.body, undefined);

        const revoked = await request('/api/auth/me', {
            headers: { Authorization: `Bearer ${refreshed.access_token}` },
        });
        assert.equal(revoked.response.status, 401);
    });

    it('拒绝错误密码、无效访问令牌和超过邮箱限额的登录请求', async () => {
        const accountEmail = email('rejected');
        const wrongPassword = await request('/api/auth/login', {
            method: 'POST',
            body: JSON.stringify({ email: accountEmail, password }),
        });
        assert.equal(wrongPassword.response.status, 401);
        const wrongPasswordError = expectError(wrongPassword.body).error;
        assert.equal(wrongPasswordError.code, 'INVALID_CREDENTIALS');
        assert.equal(
            wrongPasswordError.request_id,
            wrongPassword.response.headers.get('x-request-id'),
        );

        const invalidToken = await request('/api/auth/me', {
            headers: { Authorization: 'Bearer invalid-access-token' },
        });
        assert.equal(invalidToken.response.status, 401);
        assert.equal(expectError(invalidToken.body).error.code, 'HTTP_ERROR');

        const rateLimitedEmail = email('rate-limit');
        for (const expectedStatus of [401, 401, 429]) {
            const response = await request('/api/auth/login', {
                method: 'POST',
                body: JSON.stringify({ email: rateLimitedEmail, password }),
            });
            assert.equal(response.response.status, expectedStatus);
            if (expectedStatus === 429) {
                assert.equal(
                    expectError(response.body).error.code,
                    'AUTH_RATE_LIMITED',
                );
            }
        }
    });
});