use futures::StreamExt;
use mistralai_client::v1::{
    client::Client,
    conversation_stream::ConversationEvent,
    conversations::*,
};

mod setup;

fn make_client() -> Client {
    Client::new(None, None, None, None).unwrap()
}

#[tokio::test]
async fn test_create_conversation_stream() {
    setup::setup();
    let client = make_client();

    let req = CreateConversationRequest {
        inputs: ConversationInput::Text("What is 2 + 2? Answer in one word.".to_string()),
        model: Some("mistral-medium-latest".to_string()),
        agent_id: None,
        agent_version: None,
        name: None,
        description: None,
        instructions: Some("Respond concisely.".to_string()),
        completion_args: None,
        tools: None,
        handoff_execution: None,
        metadata: None,
        store: Some(true),
        stream: true,
    };

    let stream = client.create_conversation_stream_async(&req).await.unwrap();
    tokio::pin!(stream);

    let mut saw_started = false;
    let mut saw_output = false;
    let mut saw_done = false;
    let mut full_text = String::new();
    let mut conversation_id = String::new();
    let mut usage_tokens = 0u32;

    while let Some(result) = stream.next().await {
        let event = result.unwrap();
        match &event {
            ConversationEvent::ResponseStarted { .. } => {
                saw_started = true;
            }
            ConversationEvent::MessageOutput { .. } => {
                saw_output = true;
                if let Some(delta) = event.text_delta() {
                    full_text.push_str(&delta);
                }
            }
            ConversationEvent::ResponseDone { usage, .. } => {
                saw_done = true;
                usage_tokens = usage.total_tokens;
            }
            _ => {}
        }
    }

    assert!(saw_started, "Should receive ResponseStarted event");
    assert!(saw_output, "Should receive at least one MessageOutput event");
    assert!(saw_done, "Should receive ResponseDone event");
    assert!(!full_text.is_empty(), "Should accumulate text from deltas");
    assert!(usage_tokens > 0, "Should have token usage");

    // Accumulate and verify
    // (we can't accumulate from the consumed stream, but we verified the pieces above)
}

#[tokio::test]
async fn test_append_conversation_stream() {
    setup::setup();
    let client = make_client();

    // Create conversation (non-streaming) first
    let create_req = CreateConversationRequest {
        inputs: ConversationInput::Text("Remember: the secret word is BANANA.".to_string()),
        model: Some("mistral-medium-latest".to_string()),
        agent_id: None,
        agent_version: None,
        name: None,
        description: None,
        instructions: Some("Keep responses short.".to_string()),
        completion_args: None,
        tools: None,
        handoff_execution: None,
        metadata: None,
        store: Some(true),
        stream: false,
    };
    let created = client.create_conversation_async(&create_req).await.unwrap();

    // Append with streaming
    let append_req = AppendConversationRequest {
        inputs: ConversationInput::Text("What is the secret word?".to_string()),
        completion_args: None,
        handoff_execution: None,
        store: Some(true),
        tool_confirmations: None,
        stream: true,
    };

    let stream = client
        .append_conversation_stream_async(&created.conversation_id, &append_req)
        .await
        .unwrap();
    tokio::pin!(stream);

    let mut events = Vec::new();
    while let Some(result) = stream.next().await {
        events.push(result.unwrap());
    }

    // Should have started + output(s) + done
    assert!(
        events.iter().any(|e| matches!(e, ConversationEvent::ResponseStarted { .. })),
        "Should have ResponseStarted"
    );
    assert!(
        events.iter().any(|e| matches!(e, ConversationEvent::ResponseDone { .. })),
        "Should have ResponseDone"
    );

    // Accumulate and check the text
    let resp = mistralai_client::v1::conversation_stream::accumulate(
        &created.conversation_id,
        &events,
    );
    let text = resp.assistant_text().unwrap_or_default().to_uppercase();
    assert!(text.contains("BANANA"), "Should recall the secret word, got: {text}");

    // Cleanup
    client.delete_conversation_async(&created.conversation_id).await.unwrap();
}

#[tokio::test]
async fn test_stream_accumulate_matches_non_stream() {
    setup::setup();
    let client = make_client();

    let question = "What is the capital of Japan? One word.";

    // Non-streaming
    let req = CreateConversationRequest {
        inputs: ConversationInput::Text(question.to_string()),
        model: Some("mistral-medium-latest".to_string()),
        agent_id: None,
        agent_version: None,
        name: None,
        description: None,
        instructions: Some("Answer in exactly one word.".to_string()),
        completion_args: None,
        tools: None,
        handoff_execution: None,
        metadata: None,
        store: Some(false),
        stream: false,
    };
    let non_stream = client.create_conversation_async(&req).await.unwrap();
    let non_stream_text = non_stream.assistant_text().unwrap_or_default().to_lowercase();

    // Streaming
    let mut stream_req = req.clone();
    stream_req.stream = true;
    let stream = client.create_conversation_stream_async(&stream_req).await.unwrap();
    tokio::pin!(stream);

    let mut events = Vec::new();
    while let Some(result) = stream.next().await {
        events.push(result.unwrap());
    }
    let accumulated = mistralai_client::v1::conversation_stream::accumulate("", &events);
    let stream_text = accumulated.assistant_text().unwrap_or_default().to_lowercase();

    // Both should contain "tokyo"
    assert!(non_stream_text.contains("tokyo"), "Non-stream should say Tokyo: {non_stream_text}");
    assert!(stream_text.contains("tokyo"), "Stream should say Tokyo: {stream_text}");
}