feat: expose pokemon api

src/app.rs

@@ -0,0 +1,208 @@
+use crate::{
+    config::AppConfig, error::AppError, pokemon::PokeApiClient, service::PokedexService,
+    translation::TranslationClient,
+};
+use axum::{
+    Json, Router,
+    extract::{Path, State},
+    routing::get,
+};
+use serde::Serialize;
+use std::sync::Arc;
+
+#[derive(Clone)]
+pub struct AppState {
+    service: Arc<PokedexService>,
+}
+
+impl AppState {
+    #[must_use]
+    pub fn new(service: PokedexService) -> Self {
+        Self {
+            service: Arc::new(service),
+        }
+    }
+
+    pub fn from_config(config: &AppConfig) -> Result<Self, AppError> {
+        let pokemon = PokeApiClient::new(&config.pokeapi_base_url, config.request_timeout)?;
+        let translations =
+            TranslationClient::new(&config.translations_base_url, config.request_timeout)?;
+        Ok(Self::new(PokedexService::new(pokemon, translations)))
+    }
+}
+
+pub fn create_app(state: AppState) -> Router {
+    Router::new()
+        .route("/health", get(health))
+        .route("/pokemon/{name}", get(get_pokemon))
+        .route("/pokemon/translated/{name}", get(get_translated_pokemon))
+        .with_state(state)
+}
+
+async fn health() -> Json<HealthResponse> {
+    Json(HealthResponse { status: "ok" })
+}
+
+async fn get_pokemon(
+    State(state): State<AppState>,
+    Path(name): Path<String>,
+) -> Result<Json<crate::domain::PokemonInfo>, AppError> {
+    state.service.get_basic(&name).await.map(Json)
+}
+
+async fn get_translated_pokemon(
+    State(state): State<AppState>,
+    Path(name): Path<String>,
+) -> Result<Json<crate::domain::PokemonInfo>, AppError> {
+    state.service.get_translated(&name).await.map(Json)
+}
+
+#[derive(Serialize)]
+struct HealthResponse {
+    status: &'static str,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{AppState, create_app};
+    use crate::{pokemon::PokeApiClient, service::PokedexService, translation::TranslationClient};
+    use axum::{
+        body::{Body, to_bytes},
+        http::{Request, StatusCode},
+    };
+    use serde_json::Value;
+    use std::time::Duration;
+    use tower::ServiceExt;
+    use wiremock::{Mock, MockServer, ResponseTemplate, matchers};
+
+    #[tokio::test]
+    async fn health_endpoint_reports_ok() {
+        let pokeapi = MockServer::start().await;
+        let translations = MockServer::start().await;
+        let app = create_app(state_for(&pokeapi, &translations));
+
+        let response = app
+            .oneshot(request("/health"))
+            .await
+            .expect("request should be handled");
+
+        assert_eq!(response.status(), StatusCode::OK);
+        assert_eq!(
+            json_body(response).await,
+            serde_json::json!({ "status": "ok" })
+        );
+    }
+
+    #[tokio::test]
+    async fn pokemon_endpoint_returns_basic_pokemon_information() {
+        let pokeapi = MockServer::start().await;
+        let translations = MockServer::start().await;
+        mount_species(&pokeapi, "mewtwo", true, "rare", "Created by science.").await;
+        let app = create_app(state_for(&pokeapi, &translations));
+
+        let response = app
+            .oneshot(request("/pokemon/mewtwo"))
+            .await
+            .expect("request should be handled");
+
+        assert_eq!(response.status(), StatusCode::OK);
+        assert_eq!(
+            json_body(response).await,
+            serde_json::json!({
+                "name": "mewtwo",
+                "description": "Created by science.",
+                "habitat": "rare",
+                "isLegendary": true
+            })
+        );
+    }
+
+    #[tokio::test]
+    async fn translated_endpoint_returns_translated_description() {
+        let pokeapi = MockServer::start().await;
+        let translations = MockServer::start().await;
+        mount_species(&pokeapi, "pikachu", false, "forest", "Electric cheeks.").await;
+        Mock::given(matchers::method("POST"))
+            .and(matchers::path("/translate/shakespeare.json"))
+            .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
+                "contents": { "translated": "Electric cheeks, prithee." }
+            })))
+            .mount(&translations)
+            .await;
+        let app = create_app(state_for(&pokeapi, &translations));
+
+        let response = app
+            .oneshot(request("/pokemon/translated/pikachu"))
+            .await
+            .expect("request should be handled");
+
+        assert_eq!(response.status(), StatusCode::OK);
+        assert_eq!(
+            json_body(response).await["description"],
+            "Electric cheeks, prithee."
+        );
+    }
+
+    #[tokio::test]
+    async fn pokemon_endpoint_maps_missing_pokemon_to_404() {
+        let pokeapi = MockServer::start().await;
+        let translations = MockServer::start().await;
+        Mock::given(matchers::method("GET"))
+            .and(matchers::path("/pokemon-species/nope"))
+            .respond_with(ResponseTemplate::new(404))
+            .mount(&pokeapi)
+            .await;
+        let app = create_app(state_for(&pokeapi, &translations));
+
+        let response = app
+            .oneshot(request("/pokemon/nope"))
+            .await
+            .expect("request should be handled");
+
+        assert_eq!(response.status(), StatusCode::NOT_FOUND);
+        assert_eq!(json_body(response).await["error"], "pokemon not found");
+    }
+
+    async fn mount_species(
+        server: &MockServer,
+        name: &str,
+        is_legendary: bool,
+        habitat: &str,
+        description: &str,
+    ) {
+        Mock::given(matchers::method("GET"))
+            .and(matchers::path(format!("/pokemon-species/{name}")))
+            .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
+                "name": name,
+                "is_legendary": is_legendary,
+                "habitat": { "name": habitat },
+                "flavor_text_entries": [
+                    { "flavor_text": description, "language": { "name": "en" } }
+                ]
+            })))
+            .mount(server)
+            .await;
+    }
+
+    fn state_for(pokeapi: &MockServer, translations: &MockServer) -> AppState {
+        AppState::new(PokedexService::new(
+            PokeApiClient::new(pokeapi.uri(), Duration::from_secs(1)).expect("client should build"),
+            TranslationClient::new(translations.uri(), Duration::from_secs(1))
+                .expect("client should build"),
+        ))
+    }
+
+    fn request(path: &str) -> Request<Body> {
+        Request::builder()
+            .uri(path)
+            .body(Body::empty())
+            .expect("request should build")
+    }
+
+    async fn json_body(response: axum::response::Response) -> Value {
+        let bytes = to_bytes(response.into_body(), 1024 * 1024)
+            .await
+            .expect("body should be readable");
+        serde_json::from_slice(&bytes).expect("body should be valid JSON")
+    }
+}