pulpod 0.1.0

use std::sync::Arc;

use axum::{
    Json,
    extract::{Path, State},
    http::StatusCode,
};
use pulpo_common::api::{SecretEntry, SecretListResponse, SetSecretRequest};

use crate::api::error::{ApiError, bad_request, internal_error, not_found};

/// Validate that a secret name is a valid env var name: uppercase alphanumeric + underscores.
fn is_valid_secret_name(name: &str) -> bool {
    !name.is_empty()
        && name
            .chars()
            .all(|c| c.is_ascii_uppercase() || c.is_ascii_digit() || c == '_')
        && !name.starts_with(|c: char| c.is_ascii_digit())
}

pub async fn list_secrets(
    State(state): State<Arc<super::AppState>>,
) -> Result<Json<SecretListResponse>, ApiError> {
    let names = state
        .store
        .list_secret_names()
        .await
        .map_err(|e| internal_error(&e.to_string()))?;
    let secrets = names
        .into_iter()
        .map(|(name, env, created_at)| SecretEntry {
            name,
            env,
            created_at,
        })
        .collect();
    Ok(Json(SecretListResponse { secrets }))
}

pub async fn set_secret(
    State(state): State<Arc<super::AppState>>,
    Path(name): Path<String>,
    Json(req): Json<SetSecretRequest>,
) -> Result<StatusCode, ApiError> {
    if !is_valid_secret_name(&name) {
        return Err(bad_request(
            "Invalid secret name: must be uppercase alphanumeric and underscores (env var format)",
        ));
    }
    // Validate env field if provided
    if let Some(ref env) = req.env
        && !is_valid_secret_name(env)
    {
        return Err(bad_request(
            "Invalid env var name: must be uppercase alphanumeric and underscores",
        ));
    }
    let value = req.value.trim().to_owned();
    if value.contains('\n') || value.contains('\r') || value.contains('\0') {
        return Err(bad_request(
            "Secret value must not contain newlines or null bytes",
        ));
    }
    state
        .store
        .set_secret_with_env(&name, &value, req.env.as_deref())
        .await
        .map_err(|e| internal_error(&e.to_string()))?;
    Ok(StatusCode::NO_CONTENT)
}

pub async fn delete_secret(
    State(state): State<Arc<super::AppState>>,
    Path(name): Path<String>,
) -> Result<StatusCode, ApiError> {
    let deleted = state
        .store
        .delete_secret(&name)
        .await
        .map_err(|e| internal_error(&e.to_string()))?;
    if deleted {
        Ok(StatusCode::NO_CONTENT)
    } else {
        Err(not_found(&format!("secret not found: {name}")))
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::api::test_support::test_state;

    #[tokio::test]
    async fn test_list_secrets_empty() {
        let state = test_state().await;
        let Json(resp) = list_secrets(State(state)).await.unwrap();
        assert!(resp.secrets.is_empty());
    }

    #[tokio::test]
    async fn test_set_and_list_secrets() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "my-token".into(),
            env: None,
        };
        let status = set_secret(State(state.clone()), Path("GITHUB_TOKEN".into()), Json(req))
            .await
            .unwrap();
        assert_eq!(status, StatusCode::NO_CONTENT);

        let Json(resp) = list_secrets(State(state)).await.unwrap();
        assert_eq!(resp.secrets.len(), 1);
        assert_eq!(resp.secrets[0].name, "GITHUB_TOKEN");
        assert!(resp.secrets[0].env.is_none());
        assert!(!resp.secrets[0].created_at.is_empty());
    }

    #[tokio::test]
    async fn test_set_and_list_secrets_with_env() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "token123".into(),
            env: Some("GITHUB_TOKEN".into()),
        };
        let status = set_secret(State(state.clone()), Path("GH_WORK".into()), Json(req))
            .await
            .unwrap();
        assert_eq!(status, StatusCode::NO_CONTENT);

        let Json(resp) = list_secrets(State(state)).await.unwrap();
        assert_eq!(resp.secrets.len(), 1);
        assert_eq!(resp.secrets[0].name, "GH_WORK");
        assert_eq!(resp.secrets[0].env.as_deref(), Some("GITHUB_TOKEN"));
    }

    #[tokio::test]
    async fn test_set_secret_trims_value() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "  my-token  ".into(),
            env: None,
        };
        set_secret(State(state.clone()), Path("TOKEN".into()), Json(req))
            .await
            .unwrap();
        let value = state.store.get_secret("TOKEN").await.unwrap().unwrap();
        assert_eq!(value, "my-token");
    }

    #[tokio::test]
    async fn test_set_secret_invalid_name() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "val".into(),
            env: None,
        };
        let result = set_secret(State(state.clone()), Path("invalid-name".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
    }

    #[tokio::test]
    async fn test_set_secret_invalid_name_empty() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "val".into(),
            env: None,
        };
        let result = set_secret(State(state), Path(String::new()), Json(req)).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
    }

    #[tokio::test]
    async fn test_set_secret_invalid_name_starts_with_digit() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "val".into(),
            env: None,
        };
        let result = set_secret(State(state), Path("1TOKEN".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
    }

    #[tokio::test]
    async fn test_set_secret_invalid_env() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "val".into(),
            env: Some("invalid-env".into()),
        };
        let result = set_secret(State(state), Path("MY_KEY".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, Json(err)) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
        assert!(err.error.contains("env var name"));
    }

    #[tokio::test]
    async fn test_set_secret_invalid_env_empty() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "val".into(),
            env: Some(String::new()),
        };
        let result = set_secret(State(state), Path("MY_KEY".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
    }

    #[tokio::test]
    async fn test_set_secret_rejects_newlines() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "line1\nline2".into(),
            env: None,
        };
        let result = set_secret(State(state), Path("MY_KEY".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, body) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
        assert!(body.0.error.contains("newlines"));
    }

    #[tokio::test]
    async fn test_set_secret_rejects_null_bytes() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "value\0with\0nulls".into(),
            env: None,
        };
        let result = set_secret(State(state), Path("MY_KEY".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
    }

    #[tokio::test]
    async fn test_delete_secret_found() {
        let state = test_state().await;
        state.store.set_secret("MY_KEY", "val").await.unwrap();
        let status = delete_secret(State(state), Path("MY_KEY".into()))
            .await
            .unwrap();
        assert_eq!(status, StatusCode::NO_CONTENT);
    }

    #[tokio::test]
    async fn test_delete_secret_not_found() {
        let state = test_state().await;
        let result = delete_secret(State(state), Path("NONEXISTENT".into())).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::NOT_FOUND);
    }

    #[test]
    fn test_is_valid_secret_name() {
        assert!(is_valid_secret_name("MY_TOKEN"));
        assert!(is_valid_secret_name("GITHUB_TOKEN"));
        assert!(is_valid_secret_name("A"));
        assert!(is_valid_secret_name("A1"));
        assert!(is_valid_secret_name("MY_TOKEN_2"));
        assert!(!is_valid_secret_name(""));
        assert!(!is_valid_secret_name("my_token"));
        assert!(!is_valid_secret_name("MY-TOKEN"));
        assert!(!is_valid_secret_name("1TOKEN"));
        assert!(!is_valid_secret_name("MY TOKEN"));
    }

    #[test]
    fn test_is_valid_secret_name_boundary_cases() {
        // Leading underscore: valid env var format
        assert!(is_valid_secret_name("_LEADING"));
        assert!(is_valid_secret_name("_"));
        assert!(is_valid_secret_name("__DOUBLE"));
        assert!(is_valid_secret_name("_A"));
        // All underscores
        assert!(is_valid_secret_name("___"));
        // Mixed underscores and letters
        assert!(is_valid_secret_name("A_1_B"));
        // All digits after first letter
        assert!(is_valid_secret_name("A123"));
        // Unicode rejected
        assert!(!is_valid_secret_name("MY_T\u{00F6}KEN"));
        assert!(!is_valid_secret_name("\u{00C9}"));
        // Emoji rejected
        assert!(!is_valid_secret_name("MY_\u{1F600}"));
        // Tabs and other whitespace rejected
        assert!(!is_valid_secret_name("MY\tTOKEN"));
        assert!(!is_valid_secret_name("MY\nTOKEN"));
        // Very long name (256 chars) is valid
        let long_name = "A".repeat(256);
        assert!(is_valid_secret_name(&long_name));
    }

    #[tokio::test]
    async fn test_set_secret_rejects_carriage_return() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "line1\rline2".into(),
            env: None,
        };
        let result = set_secret(State(state), Path("MY_KEY".into()), Json(req)).await;
        assert!(result.is_err());
        let (status, _) = result.unwrap_err();
        assert_eq!(status, StatusCode::BAD_REQUEST);
    }

    #[tokio::test]
    async fn test_set_secret_whitespace_only_trims_to_empty() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "   ".into(),
            env: None,
        };
        // Whitespace-only trims to empty string — currently accepted
        let result = set_secret(State(state.clone()), Path("EMPTY_VAL".into()), Json(req)).await;
        assert!(result.is_ok());
        let value = state.store.get_secret("EMPTY_VAL").await.unwrap().unwrap();
        assert_eq!(value, "");
    }

    #[tokio::test]
    async fn test_set_secret_very_long_value() {
        let state = test_state().await;
        let long_value = "x".repeat(10_000);
        let req = SetSecretRequest {
            value: long_value.clone(),
            env: None,
        };
        let result = set_secret(State(state.clone()), Path("LONG_VAL".into()), Json(req)).await;
        assert!(result.is_ok());
        let stored = state.store.get_secret("LONG_VAL").await.unwrap().unwrap();
        assert_eq!(stored, long_value);
    }

    #[tokio::test]
    async fn test_set_secret_rejects_null_in_middle() {
        let state = test_state().await;
        let req = SetSecretRequest {
            value: "before\0after".into(),
            env: None,
        };
        let result = set_secret(State(state), Path("MY_KEY".into()), Json(req)).await;
        assert!(result.is_err());
    }

    #[tokio::test]
    async fn test_set_secret_upsert_via_api() {
        let state = test_state().await;
        let req1 = SetSecretRequest {
            value: "old".into(),
            env: None,
        };
        set_secret(State(state.clone()), Path("MY_KEY".into()), Json(req1))
            .await
            .unwrap();
        let req2 = SetSecretRequest {
            value: "new".into(),
            env: Some("CUSTOM_ENV".into()),
        };
        set_secret(State(state.clone()), Path("MY_KEY".into()), Json(req2))
            .await
            .unwrap();
        let value = state.store.get_secret("MY_KEY").await.unwrap().unwrap();
        assert_eq!(value, "new");
        // Verify env was updated too
        let names = state.store.list_secret_names().await.unwrap();
        assert_eq!(names[0].1.as_deref(), Some("CUSTOM_ENV"));
    }
}