use mock_server::config::MockSource;
use mock_server::router::MockRouter;
use std::collections::HashMap;
use serde_json::json;

#[test]
fn test_router_basic_method_path_matching() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "basic_test"
        request:
          method: "GET"
          path: "/api/test"
        response: { status: 200, body: "ok" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试精确匹配
    let matched = router.match_rule("GET", "/api/test", &HashMap::new(), &HashMap::new(), &None);
    assert!(matched.is_some());
    assert_eq!(matched.unwrap().id, "basic_test");

    // 测试方法不匹配
    let not_matched = router.match_rule("POST", "/api/test", &HashMap::new(), &HashMap::new(), &None);
    assert!(not_matched.is_none());

    // 测试路径不匹配
    let not_matched = router.match_rule("GET", "/api/other", &HashMap::new(), &HashMap::new(), &None);
    assert!(not_matched.is_none());
}

#[test]
fn test_router_case_insensitive_method() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "case_test"
        request:
          method: "GET"
          path: "/api/data"
        response: { status: 200, body: "data" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试不同大小写的方法匹配
    assert!(router.match_rule("get", "/api/data", &HashMap::new(), &HashMap::new(), &None).is_some());
    assert!(router.match_rule("GET", "/api/data", &HashMap::new(), &HashMap::new(), &None).is_some());
    assert!(router.match_rule("Get", "/api/data", &HashMap::new(), &HashMap::new(), &None).is_some());
}

#[test]
fn test_router_path_trailing_slash() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "slash_test"
        request:
          method: "POST"
          path: "/api/users"
        response: { status: 200, body: "created" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试带和不带斜杠的路径匹配
    assert!(router.match_rule("POST", "/api/users", &HashMap::new(), &HashMap::new(), &None).is_some());
    assert!(router.match_rule("POST", "/api/users/", &HashMap::new(), &HashMap::new(), &None).is_some());
}

#[test]
fn test_router_query_params_matching() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "query_test"
        request:
          method: "GET"
          path: "/api/search"
          query_params:
            q: "rust"
            limit: "10"
        response: { status: 200, body: "results" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试查询参数完全匹配
    let mut queries = HashMap::new();
    queries.insert("q".to_string(), "rust".to_string());
    queries.insert("limit".to_string(), "10".to_string());
    queries.insert("extra".to_string(), "value".to_string()); // 额外参数应该忽略

    assert!(router.match_rule("GET", "/api/search", &queries, &HashMap::new(), &None).is_some());

    // 测试查询参数不匹配
    let mut wrong_queries = HashMap::new();
    wrong_queries.insert("q".to_string(), "python".to_string());

    assert!(router.match_rule("GET", "/api/search", &wrong_queries, &HashMap::new(), &None).is_none());
}

#[test]
fn test_router_headers_matching() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "header_test"
        request:
          method: "GET"
          path: "/api/data"
          headers:
            Authorization: "Bearer token123"
            Content-Type: "application/json"
        response: { status: 200, body: "data" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试头部完全匹配（大小写不敏感）
    let mut headers = HashMap::new();
    headers.insert("authorization".to_string(), "Bearer token123".to_string());
    headers.insert("content-type".to_string(), "application/json".to_string());
    headers.insert("extra-header".to_string(), "value".to_string());

    assert!(router.match_rule("GET", "/api/data", &HashMap::new(), &headers, &None).is_some());

    // 测试头部不匹配
    let mut wrong_headers = HashMap::new();
    wrong_headers.insert("authorization".to_string(), "Bearer wrong".to_string());

    assert!(router.match_rule("GET", "/api/data", &HashMap::new(), &wrong_headers, &None).is_none());
}

#[test]
fn test_router_body_matching() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "body_test"
        request:
          method: "POST"
          path: "/api/users"
          body:
            name: "John"
            age: 30
        response: { status: 200, body: "created" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试 Body 完全匹配
    let body = Some(json!({ "name": "John", "age": 30 }));
    assert!(router.match_rule("POST", "/api/users", &HashMap::new(), &HashMap::new(), &body).is_some());

    // 测试 Body 不匹配
    let wrong_body = Some(json!({ "name": "Jane", "age": 25 }));
    assert!(router.match_rule("POST", "/api/users", &HashMap::new(), &HashMap::new(), &wrong_body).is_none());

    // 测试请求无 Body
    assert!(router.match_rule("POST", "/api/users", &HashMap::new(), &HashMap::new(), &None).is_none());
}

#[test]
fn test_router_body_string_to_json() {
    let mut index = HashMap::new();

    // YAML 中 body 是字符串，但内容是 JSON
    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "str_body_test"
        request:
          method: "POST"
          path: "/api/login"
          body: '{"username": "admin", "password": "secret"}'
        response: { status: 200, body: "token" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 请求中 body 是 JSON 对象，应该匹配
    let body = Some(json!({ "username": "admin", "password": "secret" }));
    assert!(router.match_rule("POST", "/api/login", &HashMap::new(), &HashMap::new(), &body).is_some());
}

#[test]
fn test_router_multiple_rules_same_segment() {
    let mut index = HashMap::new();

    let rule1 = serde_yaml::from_str::<MockSource>(
        r#"
        id: "rule1"
        request:
          method: "GET"
          path: "/api/users"
        response: { status: 200, body: "users" }
    "#,
    )
    .unwrap()
    .flatten();

    let rule2 = serde_yaml::from_str::<MockSource>(
        r#"
        id: "rule2"
        request:
          method: "POST"
          path: "/api/users"
        response: { status: 201, body: "created" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule1[0].clone(), rule2[0].clone()]);
    let router = MockRouter::new(index);

    // 测试不同方法匹配不同规则
    let get_matched = router.match_rule("GET", "/api/users", &HashMap::new(), &HashMap::new(), &None);
    assert!(get_matched.is_some());
    assert_eq!(get_matched.unwrap().id, "rule1");

    let post_matched = router.match_rule("POST", "/api/users", &HashMap::new(), &HashMap::new(), &None);
    assert!(post_matched.is_some());
    assert_eq!(post_matched.unwrap().id, "rule2");
}

#[test]
fn test_router_complex_matching_scenario() {
    let mut index = HashMap::new();

    let complex_rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "complex_rule"
        request:
          method: "PUT"
          path: "/api/users/123"
          query_params:
            update: "true"
          headers:
            Authorization: "Bearer token456"
            Content-Type: "application/json"
          body:
            name: "Updated"
        response: { status: 200, body: "updated" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![complex_rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试完全匹配所有条件
    let mut queries = HashMap::new();
    queries.insert("update".to_string(), "true".to_string());

    let mut headers = HashMap::new();
    headers.insert("authorization".to_string(), "Bearer token456".to_string());
    headers.insert("content-type".to_string(), "application/json".to_string());

    let body = Some(json!({ "name": "Updated" }));

    let matched = router.match_rule("PUT", "/api/users/123", &queries, &headers, &body);
    assert!(matched.is_some());
    assert_eq!(matched.unwrap().id, "complex_rule");

    // 测试缺少任何条件都不匹配
    let no_body_matched = router.match_rule("PUT", "/api/users/123", &queries, &headers, &None);
    assert!(no_body_matched.is_none());
}

#[test]
fn test_router_root_path_handling() {
    let mut index = HashMap::new();

    let root_rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "root_rule"
        request:
          method: "GET"
          path: "/"
        response: { status: 200, body: "root" }
    "#,
    )
    .unwrap()
    .flatten();

    // 根路径会被提取为空字符串 key
    index.insert("".to_string(), vec![root_rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试根路径匹配
    assert!(router.match_rule("GET", "/", &HashMap::new(), &HashMap::new(), &None).is_some());
}

#[test]
fn test_router_nonexistent_key() {
    let mut index = HashMap::new();

    let rule = serde_yaml::from_str::<MockSource>(
        r#"
        id: "test_rule"
        request:
          method: "GET"
          path: "/api/data"
        response: { status: 200, body: "data" }
    "#,
    )
    .unwrap()
    .flatten();

    index.insert("api".to_string(), vec![rule[0].clone()]);
    let router = MockRouter::new(index);

    // 测试请求不同段路径，应该不匹配
    assert!(router.match_rule("GET", "/health", &HashMap::new(), &HashMap::new(), &None).is_none());
    assert!(router.match_rule("GET", "/v2/data", &HashMap::new(), &HashMap::new(), &None).is_none());
}