use client::platforms::test::{MockDelivery, MockOutbox};
use client::{ChatClient, ContentData, ConversationIdOwned, StorageConfig};
use std::sync::Arc;

fn new_client(name: &str) -> (ChatClient<MockDelivery>, MockOutbox) {
    let outbox = MockOutbox::default();
    let delivery = MockDelivery::with_outbox(&outbox);
    (ChatClient::new(name, delivery), outbox)
}

fn pop_and_receive(
    sender_outbox: &MockOutbox,
    receiver: &mut ChatClient<MockDelivery>,
) -> Option<ContentData> {
    let raw = sender_outbox.pop_front().expect("expected envelope");
    receiver.receive(&raw).expect("receive failed")
}

#[test]
fn alice_bob_message_exchange() {
    let (mut alice, alice_outbox) = new_client("alice");
    let (mut bob, bob_outbox) = new_client("bob");

    // Exchange intro bundles out-of-band
    let bob_bundle = bob.create_intro_bundle().unwrap();

    // Alice initiates conversation with Bob
    let alice_convo_id = alice
        .create_conversation(&bob_bundle, b"hello bob")
        .unwrap();

    // Bob receives Alice's initial message
    let content = pop_and_receive(&alice_outbox, &mut bob).expect("expected content");
    assert_eq!(content.data, b"hello bob");
    assert!(content.is_new_convo);

    let bob_convo_id: ConversationIdOwned = Arc::from(content.conversation_id.as_str());

    // Bob replies
    bob.send_message(&bob_convo_id, b"hi alice").unwrap();
    let content = pop_and_receive(&bob_outbox, &mut alice).expect("expected content");
    assert_eq!(content.data, b"hi alice");
    assert!(!content.is_new_convo);

    // Multiple back-and-forth rounds
    for i in 0u8..5 {
        let msg = format!("msg {i}");
        alice.send_message(&alice_convo_id, msg.as_bytes()).unwrap();
        let content = pop_and_receive(&alice_outbox, &mut bob).expect("expected content");
        assert_eq!(content.data, msg.as_bytes());

        let reply = format!("reply {i}");
        bob.send_message(&bob_convo_id, reply.as_bytes()).unwrap();
        let content = pop_and_receive(&bob_outbox, &mut alice).expect("expected content");
        assert_eq!(content.data, reply.as_bytes());
    }

    // Both sides have exactly one conversation
    assert_eq!(alice.list_conversations().unwrap().len(), 1);
    assert_eq!(bob.list_conversations().unwrap().len(), 1);
}

#[test]
fn open_persistent_client() {
    let dir = tempfile::tempdir().unwrap();
    let db_path = dir.path().join("test.db").to_string_lossy().to_string();
    let config = StorageConfig::File(db_path);

    let client1 = ChatClient::open("alice", config.clone(), MockDelivery::default()).unwrap();
    let name1 = client1.installation_name().to_string();
    drop(client1);

    let client2 = ChatClient::open("alice", config, MockDelivery::default()).unwrap();
    let name2 = client2.installation_name().to_string();

    assert_eq!(name1, name2, "installation name should persist across restarts");
}