use axum::{
    Router,
    routing::{get, post},
};

use crate::{
    routes::{
        auth_profiles::{create_auth_profile, get_auth_profile, list_auth_profiles},
        operations::{
            create_operation, create_version, export_operation, generate_draft, get_operation,
            get_operation_version, list_operations, publish_operation, run_test, upload_input_json,
            upload_output_json,
        },
    },
    state::AppState,
};

pub fn build_app(state: AppState) -> Router {
    let admin_router = Router::new()
        .route("/operations", get(list_operations).post(create_operation))
        .route("/operations/import", post(import_operation))
        .route("/operations/{operation_id}", get(get_operation))
        .route("/operations/{operation_id}/versions", post(create_version))
        .route(
            "/operations/{operation_id}/versions/{version}",
            get(get_operation_version),
        )
        .route(
            "/operations/{operation_id}/publish",
            post(publish_operation),
        )
        .route("/operations/{operation_id}/test-runs", post(run_test))
        .route(
            "/operations/{operation_id}/samples/input-json",
            post(upload_input_json),
        )
        .route(
            "/operations/{operation_id}/samples/output-json",
            post(upload_output_json),
        )
        .route(
            "/operations/{operation_id}/drafts/generate",
            post(generate_draft),
        )
        .route("/operations/{operation_id}/export", get(export_operation))
        .route(
            "/auth-profiles",
            get(list_auth_profiles).post(create_auth_profile),
        )
        .route("/auth-profiles/{auth_profile_id}", get(get_auth_profile));

    Router::new()
        .route("/health", get(crate::routes::health))
        .merge(admin_router.clone())
        .nest("/api/admin", admin_router)
        .with_state(state)
}

use crate::routes::operations::import_operation;

#[cfg(test)]
mod tests {
    use std::{
        collections::BTreeMap,
        env,
        time::{SystemTime, UNIX_EPOCH},
    };

    use axum::{Json, Router, routing::post};
    use mcpaas_core::{ExecutionConfig, HttpMethod, Protocol, RestTarget, Target, ToolDescription};
    use mcpaas_mapping::{MappingRule, MappingSet};
    use mcpaas_registry::PostgresRegistry;
    use mcpaas_schema::{Schema, SchemaKind};
    use serde_json::{Value, json};
    use sqlx::{Executor, postgres::PgPoolOptions};
    use tokio::net::TcpListener;

    use crate::{
        app::build_app,
        service::{AdminService, OperationPayload},
        state::AppState,
    };

    #[tokio::test]
    async fn creates_publishes_and_tests_rest_operation() {
        let registry = test_registry().await;
        let storage_root = test_storage_root("lifecycle");
        let upstream_base_url = spawn_upstream_server().await;
        let base_url = spawn_admin_api(build_test_app(registry, storage_root)).await;
        let client = reqwest::Client::new();

        let created = client
            .post(format!("{base_url}/operations"))
            .json(&test_operation_payload(
                &upstream_base_url,
                "crm_create_lead",
            ))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();
        let operation_id = created["operation_id"].as_str().unwrap().to_owned();

        let listed = client
            .get(format!("{base_url}/operations"))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();
        let published = client
            .post(format!("{base_url}/operations/{operation_id}/publish"))
            .json(&json!({ "version": 1 }))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();
        let test_run = client
            .post(format!("{base_url}/operations/{operation_id}/test-runs"))
            .json(&json!({
                "version": 1,
                "input": { "email": "user@example.com" }
            }))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();

        assert_eq!(listed["items"][0]["name"], "crm_create_lead");
        assert_eq!(published["published_version"], 1);
        assert_eq!(test_run["ok"], true);
        assert_eq!(
            test_run["request_preview"]["body"]["email"],
            "user@example.com"
        );
        assert_eq!(test_run["response_preview"]["id"], "lead_123");
    }

    #[tokio::test]
    async fn manages_auth_profiles_and_yaml_upsert() {
        let registry = test_registry().await;
        let storage_root = test_storage_root("yaml");
        let upstream_base_url = spawn_upstream_server().await;
        let base_url = spawn_admin_api(build_test_app(registry, storage_root)).await;
        let client = reqwest::Client::new();

        let auth_profile = client
            .post(format!("{base_url}/auth-profiles"))
            .json(&json!({
                "name": "crm-header",
                "kind": "api_key_header",
                "config": {
                    "api_key_header": {
                        "header_name": "X-Api-Key",
                        "secret_ref": "secret://crm/api-key"
                    }
                }
            }))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();
        let created = client
            .post(format!("{base_url}/operations"))
            .json(&test_operation_payload(
                &upstream_base_url,
                "crm_export_target",
            ))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();
        let operation_id = created["operation_id"].as_str().unwrap();
        let yaml = client
            .get(format!("{base_url}/operations/{operation_id}/export"))
            .send()
            .await
            .unwrap()
            .text()
            .await
            .unwrap();
        let imported = client
            .post(format!("{base_url}/operations/import?mode=upsert"))
            .body(yaml)
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();

        assert_eq!(auth_profile["kind"], "api_key_header");
        assert_eq!(imported["operation_id"], operation_id);
        assert_eq!(imported["version"], 2);
        assert_eq!(imported["import_mode"], "upsert");
    }

    #[tokio::test]
    async fn uploads_samples_and_generates_draft() {
        let registry = test_registry().await;
        let storage_root = test_storage_root("draft");
        let upstream_base_url = spawn_upstream_server().await;
        let base_url = spawn_admin_api(build_test_app(registry, storage_root)).await;
        let client = reqwest::Client::new();

        let created = client
            .post(format!("{base_url}/operations"))
            .json(&test_operation_payload(
                &upstream_base_url,
                "crm_draft_target",
            ))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();
        let operation_id = created["operation_id"].as_str().unwrap();

        client
            .post(format!(
                "{base_url}/operations/{operation_id}/samples/input-json"
            ))
            .json(&json!({ "email": "user@example.com", "name": "Ada" }))
            .send()
            .await
            .unwrap();
        client
            .post(format!(
                "{base_url}/operations/{operation_id}/samples/output-json"
            ))
            .json(&json!({ "id": "lead_123", "status": "created" }))
            .send()
            .await
            .unwrap();

        let generated = client
            .post(format!(
                "{base_url}/operations/{operation_id}/drafts/generate"
            ))
            .json(&json!({
                "sources": ["input_json_sample", "output_json_sample"]
            }))
            .send()
            .await
            .unwrap()
            .json::<Value>()
            .await
            .unwrap();

        assert_eq!(generated["generated_draft"]["status"], "available");
        assert_eq!(
            generated["input_schema"]["fields"]["email"]["type"],
            "string"
        );
        assert_eq!(
            generated["output_mapping"]["rules"][0]["target"],
            "$.output.id"
        );
    }

    fn build_test_app(registry: PostgresRegistry, storage_root: std::path::PathBuf) -> Router {
        build_app(AppState {
            service: AdminService::new(registry, storage_root),
        })
    }

    async fn spawn_upstream_server() -> String {
        let app = Router::new().route("/crm/leads", post(create_lead));
        let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
        let address = listener.local_addr().unwrap();

        tokio::spawn(async move {
            axum::serve(listener, app).await.unwrap();
        });

        format!("http://{}", address)
    }

    async fn spawn_admin_api(app: Router) -> String {
        let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
        let address = listener.local_addr().unwrap();

        tokio::spawn(async move {
            axum::serve(listener, app).await.unwrap();
        });

        format!("http://{}", address)
    }

    async fn create_lead(Json(payload): Json<Value>) -> Json<Value> {
        Json(json!({
            "id": "lead_123",
            "status": "created",
            "email": payload["email"]
        }))
    }

    async fn test_registry() -> PostgresRegistry {
        let database_url = env::var("TEST_DATABASE_URL")
            .unwrap_or_else(|_| "postgres://rmcp:rmcp@127.0.0.1:5432/rmcp".to_owned());
        let admin_pool = PgPoolOptions::new()
            .max_connections(1)
            .connect(&database_url)
            .await
            .unwrap();
        let schema = format!(
            "test_admin_api_{}_{}",
            std::process::id(),
            SystemTime::now()
                .duration_since(UNIX_EPOCH)
                .unwrap()
                .as_nanos()
        );

        admin_pool
            .execute(sqlx::query(&format!("create schema {schema}")))
            .await
            .unwrap();

        PostgresRegistry::connect(&format!("{database_url}?options=-csearch_path%3D{schema}"))
            .await
            .unwrap()
    }

    fn test_storage_root(name: &str) -> std::path::PathBuf {
        env::temp_dir().join(format!(
            "rmcp_admin_api_{name}_{}_{}",
            std::process::id(),
            SystemTime::now()
                .duration_since(UNIX_EPOCH)
                .unwrap()
                .as_nanos()
        ))
    }

    fn test_operation_payload(base_url: &str, name: &str) -> OperationPayload {
        OperationPayload {
            name: name.to_owned(),
            display_name: "Create Lead".to_owned(),
            protocol: Protocol::Rest,
            target: Target::Rest(RestTarget {
                base_url: base_url.to_owned(),
                method: HttpMethod::Post,
                path_template: "/crm/leads".to_owned(),
                static_headers: BTreeMap::new(),
            }),
            input_schema: object_schema("email"),
            output_schema: object_schema("id"),
            input_mapping: MappingSet {
                rules: vec![MappingRule {
                    source: "$.mcp.email".to_owned(),
                    target: "$.request.body.email".to_owned(),
                    required: true,
                    default_value: None,
                    transform: None,
                    condition: None,
                    notes: None,
                }],
            },
            output_mapping: MappingSet {
                rules: vec![MappingRule {
                    source: "$.response.body.id".to_owned(),
                    target: "$.output.id".to_owned(),
                    required: true,
                    default_value: None,
                    transform: None,
                    condition: None,
                    notes: None,
                }],
            },
            execution_config: ExecutionConfig {
                timeout_ms: 1_000,
                retry_policy: None,
                auth_profile_ref: None,
                headers: BTreeMap::new(),
                protocol_options: None,
            },
            tool_description: ToolDescription {
                title: "Create Lead".to_owned(),
                description: "Creates a CRM lead".to_owned(),
                tags: vec!["crm".to_owned()],
                examples: Vec::new(),
            },
        }
    }

    fn object_schema(field_name: &str) -> Schema {
        Schema {
            kind: SchemaKind::Object,
            description: None,
            required: true,
            nullable: false,
            default_value: None,
            fields: BTreeMap::from([(
                field_name.to_owned(),
                Schema {
                    kind: SchemaKind::String,
                    description: None,
                    required: true,
                    nullable: false,
                    default_value: None,
                    fields: BTreeMap::new(),
                    items: None,
                    enum_values: Vec::new(),
                    variants: Vec::new(),
                },
            )]),
            items: None,
            enum_values: Vec::new(),
            variants: Vec::new(),
        }
    }
}