use std::sync::{Arc, Mutex};

use async_trait::async_trait;
use domain::ports::{
    ChatAttachmentImport, ChatAttachmentStore, ChatAttachmentStoreError, Clock, IdGenerator,
};
use domain::{
    AgentId, ChatAttachment, ChatAttachmentSourceKind, LocalPath, Project, ProjectId, ProjectPath,
    RemoteRef, SessionId,
};
use uuid::Uuid;

use application::{ImportChatAttachmentItem, ImportChatAttachments, ImportChatAttachmentsInput};

#[derive(Default)]
struct FakeChatAttachments {
    calls: Mutex<Vec<(LocalPath, ChatAttachmentImport)>>,
}

#[async_trait]
impl ChatAttachmentStore for FakeChatAttachments {
    async fn import_from_path(
        &self,
        root: &ProjectPath,
        project_id: ProjectId,
        agent_id: AgentId,
        session_id: SessionId,
        source: &LocalPath,
        import: ChatAttachmentImport,
    ) -> Result<ChatAttachment, ChatAttachmentStoreError> {
        self.calls
            .lock()
            .unwrap()
            .push((source.clone(), import.clone()));
        let storage_path = format!(
            "agent-chat/{session_id}/{}-{}",
            import.id.as_str(),
            import.filename
        );
        let readable_path = format!(
            "{}/.ideai/attachments/agent-chat/{session_id}/{}-{}",
            root.as_str(),
            import.id.as_str(),
            import.filename
        );
        Ok(ChatAttachment {
            id: import.id,
            project_id,
            agent_id,
            session_id,
            filename: import.filename.clone(),
            mime: import.mime.clone(),
            size_bytes: 12,
            source_kind: import.source_kind,
            storage_path,
            readable_path,
            created_at: import.created_at,
        })
    }

    async fn list_for_session(
        &self,
        _root: &ProjectPath,
        _session_id: SessionId,
    ) -> Result<Vec<ChatAttachment>, ChatAttachmentStoreError> {
        Ok(Vec::new())
    }
}

struct FixedClock;

impl Clock for FixedClock {
    fn now_millis(&self) -> i64 {
        1_234
    }
}

struct FixedIds;

impl IdGenerator for FixedIds {
    fn new_uuid(&self) -> Uuid {
        Uuid::parse_str("11111111-2222-3333-4444-555555555555").unwrap()
    }
}

fn project() -> Project {
    Project::new(
        ProjectId::from_uuid(Uuid::parse_str("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa").unwrap()),
        "P",
        ProjectPath::new("/tmp/idea-chat-attachments-test").unwrap(),
        RemoteRef::Local,
        0,
    )
    .unwrap()
}

#[tokio::test]
async fn import_chat_attachments_allocates_metadata_and_uses_store_port() {
    let store = Arc::new(FakeChatAttachments::default());
    let usecase = ImportChatAttachments::new(
        Arc::clone(&store) as Arc<dyn ChatAttachmentStore>,
        Arc::new(FixedIds),
        Arc::new(FixedClock),
    );
    let agent_id =
        AgentId::from_uuid(Uuid::parse_str("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb").unwrap());
    let session_id =
        SessionId::from_uuid(Uuid::parse_str("cccccccc-cccc-cccc-cccc-cccccccccccc").unwrap());

    let output = usecase
        .execute(ImportChatAttachmentsInput {
            project: project(),
            agent_id,
            session_id,
            attachments: vec![ImportChatAttachmentItem {
                path: "/outside/photo.png".to_owned(),
                mime: None,
                source_kind: ChatAttachmentSourceKind::Clipboard,
            }],
        })
        .await
        .unwrap();

    assert_eq!(output.attachments.len(), 1);
    let attachment = &output.attachments[0];
    assert_eq!(attachment.filename, "photo.png");
    assert_eq!(attachment.mime, "image/png");
    assert_eq!(attachment.source_kind, ChatAttachmentSourceKind::Clipboard);
    assert_eq!(attachment.created_at, 1_234);
    assert!(attachment
        .storage_path
        .starts_with("agent-chat/cccccccc-cccc-cccc-cccc-cccccccccccc/"));
    assert!(attachment
        .readable_path
        .contains("/.ideai/attachments/agent-chat/"));

    let calls = store.calls.lock().unwrap();
    assert_eq!(calls.len(), 1);
    assert_eq!(calls[0].0.as_str(), "/outside/photo.png");
}

#[tokio::test]
async fn import_chat_attachments_rejects_executable_sources_before_store_call() {
    let store = Arc::new(FakeChatAttachments::default());
    let usecase = ImportChatAttachments::new(
        Arc::clone(&store) as Arc<dyn ChatAttachmentStore>,
        Arc::new(FixedIds),
        Arc::new(FixedClock),
    );

    let err = usecase
        .execute(ImportChatAttachmentsInput {
            project: project(),
            agent_id: AgentId::new_random(),
            session_id: SessionId::new_random(),
            attachments: vec![ImportChatAttachmentItem {
                path: "/outside/run.sh".to_owned(),
                mime: None,
                source_kind: ChatAttachmentSourceKind::LocalFile,
            }],
        })
        .await
        .unwrap_err();

    assert_eq!(err.code(), "INVALID");
    assert!(store.calls.lock().unwrap().is_empty());
}