// 暖记模块集成测试 — 直接调用 Service 层，使用 TestDb 独立数据库
//
// 测试覆盖：
// 1. 日记 CRUD 全流程（创建/查询/更新/软删除）
// 2. 班级码生成与成员管理
// 3. 同步服务批量操作 + 版本冲突检测
// 4. 心情统计聚合
// 5. 家长绑定两步验证流程

use chrono::Utc;
use erp_core::crypto::PiiCrypto;
use erp_core::events::EventBus;
use erp_diary::dto::{
    ClassMemberResp, CreateJournalReq, Mood, SyncChange, UpdateJournalReq, Weather,
};
use erp_diary::service::{
    achievement_service::AchievementService, class_service::ClassService,
    journal_service::JournalService, mood_stats_service::MoodStatsService,
    parent_service::ParentService, sync_service::SyncService,
};
use erp_diary::service::mood_stats_service::StatsPeriod;

use super::test_db::TestDb;

/// 构造 DiaryState 所需的共享组件（不含 db）
struct TestContext {
    event_bus: EventBus,
    _crypto: PiiCrypto,
}

impl TestContext {
    fn new() -> Self {
        Self {
            event_bus: EventBus::new(100),
            _crypto: PiiCrypto::dev_default(),
        }
    }
}

// ============================================================
// 日记 CRUD
// ============================================================

#[tokio::test]
async fn test_journal_crud_full_lifecycle() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let author_id = uuid::Uuid::new_v4();

    // 1. 创建
    let created = JournalService::create(
        tenant_id,
        author_id,
        &CreateJournalReq {
            title: "今天很开心".to_string(),
            date: chrono::NaiveDate::from_ymd_opt(2026, 6, 3).unwrap(),
            mood: Mood::Happy,
            weather: Weather::Sunny,
            tags: vec!["心情".to_string()],
            is_private: false,
            class_id: None,
            assigned_topic_id: None,
        },
        db,
        &ctx.event_bus,
    )
    .await
    .expect("创建日记失败");

    assert_eq!(created.title, "今天很开心");
    assert_eq!(created.version, 1);
    assert_eq!(created.author_id, author_id);
    assert!(created.assigned_topic_id.is_none());

    // 2. 按 ID 查询
    let found = JournalService::get_by_id(tenant_id, created.id, db)
        .await
        .expect("查询日记失败");
    assert_eq!(found.title, "今天很开心");
    assert!(matches!(found.mood, Mood::Happy));

    // 3. 更新
    let updated = JournalService::update(
        tenant_id,
        author_id,
        created.id,
        &UpdateJournalReq {
            title: Some("今天非常开心".to_string()),
            mood: Some(Mood::Calm),
            weather: None,
            tags: None,
            is_private: None,
            shared_to_class: None,
            version: 1,
        },
        db,
        &ctx.event_bus,
    )
    .await
    .expect("更新日记失败");

    assert_eq!(updated.title, "今天非常开心");
    assert_eq!(updated.version, 2);
    assert!(matches!(updated.mood, Mood::Calm));

    // 4. 列表查询
    let (items, total) = JournalService::list(
        tenant_id,
        Some(author_id),
        None,
        None,
        None,
        None,
        1,
        10,
        db,
    )
    .await
    .expect("日记列表查询失败");
    assert_eq!(total, 1);
    assert_eq!(items[0].title, "今天非常开心");

    // 5. 软删除
    JournalService::delete(tenant_id, author_id, created.id, 2, db, &ctx.event_bus)
        .await
        .expect("删除日记失败");

    // 6. 删除后查询应失败
    let result = JournalService::get_by_id(tenant_id, created.id, db).await;
    assert!(result.is_err(), "已删除日记应无法查询");
}

#[tokio::test]
async fn test_journal_version_conflict_on_update() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let author_id = uuid::Uuid::new_v4();

    let created = JournalService::create(
        tenant_id,
        author_id,
        &CreateJournalReq {
            title: "版本冲突测试".to_string(),
            date: chrono::NaiveDate::from_ymd_opt(2026, 6, 3).unwrap(),
            mood: Mood::Happy,
            weather: Weather::Sunny,
            tags: vec![],
            is_private: true,
            class_id: None,
            assigned_topic_id: None,
        },
        db,
        &ctx.event_bus,
    )
    .await
    .unwrap();

    // 用错误版本号更新 → 应失败
    let result = JournalService::update(
        tenant_id,
        author_id,
        created.id,
        &UpdateJournalReq {
            title: Some("冲突".to_string()),
            mood: None,
            weather: None,
            tags: None,
            is_private: None,
            shared_to_class: None,
            version: 999, // 错误版本
        },
        db,
        &ctx.event_bus,
    )
    .await;

    assert!(result.is_err(), "版本冲突应导致更新失败");
}

#[tokio::test]
async fn test_journal_tenant_isolation() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();

    let tenant_a = uuid::Uuid::new_v4();
    let tenant_b = uuid::Uuid::new_v4();
    let author_a = uuid::Uuid::new_v4();

    // 租户 A 创建日记
    let _journal_a = JournalService::create(
        tenant_a,
        author_a,
        &CreateJournalReq {
            title: "租户A的日记".to_string(),
            date: chrono::NaiveDate::from_ymd_opt(2026, 6, 3).unwrap(),
            mood: Mood::Happy,
            weather: Weather::Sunny,
            tags: vec![],
            is_private: true,
            class_id: None,
            assigned_topic_id: None,
        },
        db,
        &ctx.event_bus,
    )
    .await
    .unwrap();

    // 租户 B 查询不应看到租户 A 的日记
    let (_, total_b) = JournalService::list(tenant_b, None, None, None, None, None, 1, 10, db)
        .await
        .unwrap();
    assert_eq!(total_b, 0, "租户隔离：B 不应看到 A 的数据");
}

// ============================================================
// 班级管理
// ============================================================

#[tokio::test]
async fn test_class_create_and_join() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let teacher_id = uuid::Uuid::new_v4();
    let student_id = uuid::Uuid::new_v4();

    // 1. 老师创建班级
    let class_resp = ClassService::create_class(
        tenant_id,
        teacher_id,
        "三年二班".to_string(),
        Some("测试小学".to_string()),
        db,
        &ctx.event_bus,
    )
    .await
    .expect("创建班级失败");

    assert_eq!(class_resp.name, "三年二班");
    assert_eq!(class_resp.member_count, 1); // 老师自动加入
    assert_eq!(class_resp.class_code.len(), 6);
    assert!(class_resp.is_active);

    // 2. 学生通过班级码加入
    let joined = ClassService::join_class(
        tenant_id,
        student_id,
        class_resp.class_code.clone(),
        Some("小明".to_string()),
        db,
        None, // 无 Redis
        &ctx.event_bus,
    )
    .await
    .expect("加入班级失败");

    assert_eq!(joined.member_count, 2);

    // 3. 查询班级成员
    let members = ClassService::list_members(tenant_id, class_resp.id, db)
        .await
        .expect("查询成员失败");
    assert_eq!(members.len(), 2);

    let roles: Vec<&str> = members.iter().map(|m: &ClassMemberResp| m.role.as_str()).collect();
    assert!(roles.contains(&"teacher"));
    assert!(roles.contains(&"student"));

    // 4. 查询我的班级
    let my_classes = ClassService::my_classes(tenant_id, student_id, db)
        .await
        .expect("查询我的班级失败");
    assert_eq!(my_classes.len(), 1);

    // 5. 重置班级码
    let reset_resp = ClassService::reset_class_code(tenant_id, teacher_id, class_resp.id, db)
        .await
        .expect("重置班级码失败");
    assert_ne!(reset_resp.new_class_code, class_resp.class_code);
    assert_eq!(reset_resp.class_id, class_resp.id);
}

// ============================================================
// 同步服务 — 批量操作 + 版本冲突检测
// ============================================================

#[tokio::test]
async fn test_sync_batch_create_and_fetch() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let user_id = uuid::Uuid::new_v4();

    // 批量创建 3 篇日记
    let changes = vec![
        SyncChange::CreateJournal {
            data: serde_json::json!({
                "title": "日记1",
                "date": "2026-06-01",
                "mood": "happy",
                "weather": "sunny",
                "tags": [],
                "is_private": true,
            }),
        },
        SyncChange::CreateJournal {
            data: serde_json::json!({
                "title": "日记2",
                "date": "2026-06-02",
                "mood": "calm",
                "weather": "cloudy",
                "tags": ["test"],
                "is_private": false,
            }),
        },
        SyncChange::CreateJournal {
            data: serde_json::json!({
                "title": "日记3",
                "date": "2026-06-03",
                "mood": "thinking",
                "weather": "rainy",
                "tags": [],
                "is_private": true,
            }),
        },
    ];

    let resp = SyncService::sync(tenant_id, user_id, None, changes, db)
        .await
        .expect("同步失败");

    assert!(resp.conflicts.is_empty(), "新创建不应有冲突");
    assert!(resp.server_changes.len() >= 3, "应返回至少 3 条服务端变更");
    assert!(resp.sync_time <= Utc::now());
}

#[tokio::test]
async fn test_sync_version_conflict_detection() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let user_id = uuid::Uuid::new_v4();

    // 先创建一篇日记
    let created = JournalService::create(
        tenant_id,
        user_id,
        &CreateJournalReq {
            title: "冲突测试".to_string(),
            date: chrono::NaiveDate::from_ymd_opt(2026, 6, 3).unwrap(),
            mood: Mood::Happy,
            weather: Weather::Sunny,
            tags: vec![],
            is_private: true,
            class_id: None,
            assigned_topic_id: None,
        },
        db,
        &ctx.event_bus,
    )
    .await
    .unwrap();

    // 用错误版本号同步更新 → 应产生冲突
    let changes = vec![SyncChange::UpdateJournal {
        id: created.id,
        version: 999, // 错误版本
        data: serde_json::json!({"title": "冲突更新"}),
    }];

    let resp = SyncService::sync(tenant_id, user_id, None, changes, db)
        .await
        .expect("同步调用失败");

    assert_eq!(resp.conflicts.len(), 1, "版本不匹配应产生冲突");
    assert_eq!(resp.conflicts[0].journal_id, created.id);
    assert_eq!(resp.conflicts[0].local_version, 999);
    assert_eq!(resp.conflicts[0].server_version, 1);
}

// ============================================================
// 心情统计
// ============================================================

#[tokio::test]
async fn test_mood_stats_aggregation() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let author_id = uuid::Uuid::new_v4();

    // 创建几篇不同心情的日记
    let moods = vec![
        (Mood::Happy, "2026-06-01"),
        (Mood::Happy, "2026-06-02"),
        (Mood::Calm, "2026-06-03"),
    ];

    for (mood, date_str) in moods {
        JournalService::create(
            tenant_id,
            author_id,
            &CreateJournalReq {
                title: format!("{}日记", date_str),
                date: date_str.parse().unwrap(),
                mood,
                weather: Weather::Sunny,
                tags: vec![],
                is_private: true,
                class_id: None,
                assigned_topic_id: None,
            },
            db,
            &ctx.event_bus,
        )
        .await
        .unwrap();
    }

    // 查询统计
    let stats = MoodStatsService::get_mood_stats(tenant_id, author_id, StatsPeriod::Week, db)
        .await
        .expect("心情统计查询失败");

    // 验证返回了数据
    assert!(
        serde_json::to_string(&stats)
            .unwrap()
            .contains("mood_counts"),
        "统计响应应包含 mood_counts"
    );
}

// ============================================================
// 家长绑定两步验证
// ============================================================

#[tokio::test]
async fn test_parent_binding_two_step_verification() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let ctx = TestContext::new();
    let tenant_id = uuid::Uuid::new_v4();
    let parent_id = uuid::Uuid::new_v4();

    // 注意：此测试验证绑定流程逻辑
    // bind_child 会检查孩子是否为 student 角色
    // 由于测试环境中可能没有 auth 模块的用户记录
    // 此测试仅验证 service 层的错误处理
    let result = ParentService::bind_child(
        tenant_id,
        parent_id,
        uuid::Uuid::new_v4(), // 不存在的孩子 ID
        db,
        &ctx.event_bus,
    )
    .await;

    // 预期失败：孩子用户不存在或不是学生角色
    assert!(
        result.is_err(),
        "绑定不存在的孩子应失败"
    );
}

// ============================================================
// 成就查询
// ============================================================

#[tokio::test]
async fn test_achievement_list() {
    let test_db = TestDb::new().await;
    let db = test_db.db();
    let tenant_id = uuid::Uuid::new_v4();
    let user_id = uuid::Uuid::new_v4();

    // 查询成就列表（无种子数据时应返回空列表或预设列表）
    let result = AchievementService::list_achievements(tenant_id, user_id, db).await;
    // 成就查询不应失败，即使无数据
    assert!(result.is_ok(), "成就列表查询不应失败");
}