use axum::Json;
use axum::http::StatusCode;
use axum::response::IntoResponse;
use axum::routing::{post, put};
use axum::{Router, routing::get};
use serde_json::json;
use sqlx::SqlitePool;

mod auth;
mod health;
mod locations;
mod notifications;
mod users;
mod weather_poller;
mod weather_thresholds;

// --- users_api ---
mod users_api {
    use super::*;
    use crate::auth::AuthUser;
    use crate::users::{User, UserRepository, UserRole};
    use axum::{
        Json,
        extract::{Path, State},
    };
    use serde::Deserialize;
    use std::sync::Arc;

    #[derive(Deserialize)]
    pub struct CreateUser {
        pub role: Option<UserRole>,
    }

    #[derive(Deserialize)]
    pub struct UpdateUser {
        pub role: UserRole,
    }

    pub async fn list_users(
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<Vec<User>>, String> {
        let repo = UserRepository { db: &pool };
        repo.list_users().await.map(Json).map_err(|e| e.to_string())
    }

    pub async fn get_user(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<User>, String> {
        let repo = UserRepository { db: &pool };
        repo.get_user_by_id(id)
            .await
            .map_err(|e| e.to_string())?
            .map(Json)
            .ok_or_else(|| "User not found".to_string())
    }

    pub async fn create_user(
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<CreateUser>,
    ) -> Result<Json<User>, String> {
        let repo = UserRepository { db: &pool };
        repo.create_user(None, payload.role)
            .await
            .map(Json)
            .map_err(|e| e.to_string())
    }

    pub async fn update_user(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<UpdateUser>,
    ) -> Result<Json<User>, String> {
        let repo = UserRepository { db: &pool };
        repo.update_user(id, payload.role)
            .await
            .map(Json)
            .map_err(|e| e.to_string())
    }

    pub async fn delete_user(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<(), String> {
        let repo = UserRepository { db: &pool };
        repo.delete_user(id).await.map_err(|e| e.to_string())
    }
}
// --- locations_api ---
mod locations_api {
    use super::*;
    use crate::auth::AuthUser;
    use crate::locations::{Location, LocationRepository};
    use axum::{
        Json,
        extract::{Path, State},
    };
    use serde::Deserialize;
    use std::sync::Arc;

    #[derive(Deserialize)]
    pub struct CreateLocation {
        pub latitude: f64,
        pub longitude: f64,
    }

    #[derive(Deserialize)]
    pub struct UpdateLocation {
        pub latitude: f64,
        pub longitude: f64,
    }

    pub async fn list_locations(
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<Vec<Location>>, String> {
        let repo = LocationRepository { db: &pool };
        repo.list_locations()
            .await
            .map(Json)
            .map_err(|e| e.to_string())
    }

    pub async fn get_location(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<Location>, String> {
        let repo = LocationRepository { db: &pool };
        repo.get_location(id)
            .await
            .map_err(|e| e.to_string())?
            .map(Json)
            .ok_or_else(|| "Location not found".to_string())
    }

    pub async fn create_location(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<CreateLocation>,
    ) -> Result<Json<Location>, String> {
        let repo = LocationRepository { db: &pool };
        repo.create_location(payload.latitude, payload.longitude, user.id)
            .await
            .map(Json)
            .map_err(|e| e.to_string())
    }

    pub async fn update_location(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<UpdateLocation>,
    ) -> Result<Json<Location>, String> {
        let repo = LocationRepository { db: &pool };
        repo.update_location(id, payload.latitude, payload.longitude)
            .await
            .map(Json)
            .map_err(|e| e.to_string())
    }

    pub async fn delete_location(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<(), String> {
        let repo = LocationRepository { db: &pool };
        repo.delete_location(id).await.map_err(|e| e.to_string())
    }
}
// --- thresholds_api ---
mod thresholds_api {
    use super::*;
    use crate::auth::AuthUser;
    use crate::weather_thresholds::{WeatherThreshold, WeatherThresholdRepository};
    use axum::{
        Json,
        extract::{Path, State},
    };
    use serde::Deserialize;
    use std::sync::Arc;

    #[derive(Deserialize)]
    pub struct CreateThreshold {
        pub condition_type: String,
        pub threshold_value: f64,
        pub operator: String,
        pub enabled: bool,
        pub description: Option<String>,
    }

    #[derive(Deserialize)]
    pub struct UpdateThreshold {
        pub condition_type: String,
        pub threshold_value: f64,
        pub operator: String,
        pub enabled: bool,
        pub description: Option<String>,
    }

    pub async fn list_thresholds(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> impl axum::response::IntoResponse {
        let repo = WeatherThresholdRepository { db: &pool };
        match repo.list_thresholds(user.id).await {
            Ok(thresholds) => Json(thresholds).into_response(),
            Err(e) => error_response(StatusCode::INTERNAL_SERVER_ERROR, &e.to_string()),
        }
    }

    pub async fn get_threshold(
        Path(id): Path<i64>,
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<WeatherThreshold>, String> {
        let repo = WeatherThresholdRepository { db: &pool };
        repo.get_threshold(id, user.id)
            .await
            .map_err(|e| e.to_string())?
            .map(Json)
            .ok_or_else(|| "Threshold not found".to_string())
    }

    pub async fn create_threshold(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<CreateThreshold>,
    ) -> Result<Json<WeatherThreshold>, String> {
        let repo = WeatherThresholdRepository { db: &pool };
        repo.create_threshold(
            user.id,
            payload.condition_type,
            payload.threshold_value,
            payload.operator,
            payload.enabled,
            payload.description,
        )
        .await
        .map(Json)
        .map_err(|e| e.to_string())
    }

    pub async fn update_threshold(
        Path(id): Path<i64>,
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<UpdateThreshold>,
    ) -> Result<Json<WeatherThreshold>, String> {
        let repo = WeatherThresholdRepository { db: &pool };
        repo.update_threshold(crate::weather_thresholds::WeatherThresholdUpdateInput {
            id,
            user_id: user.id,
            condition_type: payload.condition_type,
            threshold_value: payload.threshold_value,
            operator: payload.operator,
            enabled: payload.enabled,
            description: payload.description,
        })
        .await
        .map(Json)
        .map_err(|e| e.to_string())
    }

    pub async fn delete_threshold(
        Path(id): Path<i64>,
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<(), String> {
        let repo = WeatherThresholdRepository { db: &pool };
        repo.delete_threshold(id, user.id)
            .await
            .map_err(|e| e.to_string())
    }
}
// --- notifications_api ---
mod notifications_api {
    use super::*;
    use crate::auth::AuthUser;
    use crate::notifications::{
        NtfySettings, NtfySettingsRepository, SmtpSettings, SmtpSettingsRepository,
    };
    use axum::{
        Json,
        extract::{Path, State},
    };
    use serde::Deserialize;
    use std::sync::Arc;

    // NTFY
    #[derive(Deserialize)]
    pub struct CreateNtfy {
        pub enabled: bool,
        pub topic: String,
        pub server_url: String,
        pub priority: i32,
        pub title_template: Option<String>,
        pub message_template: Option<String>,
    }
    #[derive(Deserialize)]
    pub struct UpdateNtfy {
        pub enabled: bool,
        pub topic: String,
        pub server_url: String,
        pub priority: i32,
        pub title_template: Option<String>,
        pub message_template: Option<String>,
    }
    pub async fn get_ntfy_settings(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<NtfySettings>, String> {
        let repo = NtfySettingsRepository { db: &pool };
        repo.get_by_user(user.id)
            .await
            .map_err(|e| e.to_string())?
            .map(Json)
            .ok_or_else(|| "NTFY settings not found".to_string())
    }
    pub async fn create_ntfy_settings(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<CreateNtfy>,
    ) -> Result<Json<NtfySettings>, String> {
        let repo = NtfySettingsRepository { db: &pool };
        repo.create(crate::notifications::NtfySettingsInput {
            user_id: user.id,
            enabled: payload.enabled,
            topic: payload.topic,
            server_url: payload.server_url,
            priority: payload.priority,
            title_template: payload.title_template,
            message_template: payload.message_template,
        })
        .await
        .map(Json)
        .map_err(|e| e.to_string())
    }
    pub async fn update_ntfy_settings(
        Path(id): Path<i64>,
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<UpdateNtfy>,
    ) -> Result<Json<NtfySettings>, String> {
        let repo = NtfySettingsRepository { db: &pool };
        repo.update(
            id,
            crate::notifications::NtfySettingsInput {
                user_id: user.id,
                enabled: payload.enabled,
                topic: payload.topic,
                server_url: payload.server_url,
                priority: payload.priority,
                title_template: payload.title_template,
                message_template: payload.message_template,
            },
        )
        .await
        .map(Json)
        .map_err(|e| e.to_string())
    }
    pub async fn delete_ntfy_settings(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<(), String> {
        let repo = NtfySettingsRepository { db: &pool };
        repo.delete(id).await.map_err(|e| e.to_string())
    }

    // SMTP
    #[derive(Deserialize)]
    pub struct CreateSmtp {
        pub enabled: bool,
        pub email: String,
        pub smtp_server: String,
        pub smtp_port: i32,
        pub username: Option<String>,
        pub password: Option<String>,
        pub use_tls: bool,
        pub from_email: Option<String>,
        pub from_name: Option<String>,
        pub subject_template: Option<String>,
        pub body_template: Option<String>,
    }
    #[derive(Deserialize)]
    pub struct UpdateSmtp {
        pub enabled: bool,
        pub email: String,
        pub smtp_server: String,
        pub smtp_port: i32,
        pub username: Option<String>,
        pub password: Option<String>,
        pub use_tls: bool,
        pub from_email: Option<String>,
        pub from_name: Option<String>,
        pub subject_template: Option<String>,
        pub body_template: Option<String>,
    }
    pub async fn get_smtp_settings(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<Json<SmtpSettings>, String> {
        let repo = SmtpSettingsRepository { db: &pool };
        repo.get_by_user(user.id)
            .await
            .map_err(|e| e.to_string())?
            .map(Json)
            .ok_or_else(|| "SMTP settings not found".to_string())
    }
    pub async fn create_smtp_settings(
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<CreateSmtp>,
    ) -> Result<Json<SmtpSettings>, String> {
        let repo = SmtpSettingsRepository { db: &pool };
        repo.create(crate::notifications::SmtpSettingsInput {
            user_id: user.id,
            enabled: payload.enabled,
            email: payload.email,
            smtp_server: payload.smtp_server,
            smtp_port: payload.smtp_port,
            username: payload.username,
            password: payload.password,
            use_tls: payload.use_tls,
            from_email: payload.from_email,
            from_name: payload.from_name,
            subject_template: payload.subject_template,
            body_template: payload.body_template,
        })
        .await
        .map(Json)
        .map_err(|e| e.to_string())
    }
    pub async fn update_smtp_settings(
        Path(id): Path<i64>,
        AuthUser(user): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
        Json(payload): Json<UpdateSmtp>,
    ) -> Result<Json<SmtpSettings>, String> {
        let repo = SmtpSettingsRepository { db: &pool };
        repo.update(
            id,
            crate::notifications::SmtpSettingsInput {
                user_id: user.id,
                enabled: payload.enabled,
                email: payload.email,
                smtp_server: payload.smtp_server,
                smtp_port: payload.smtp_port,
                username: payload.username,
                password: payload.password,
                use_tls: payload.use_tls,
                from_email: payload.from_email,
                from_name: payload.from_name,
                subject_template: payload.subject_template,
                body_template: payload.body_template,
            },
        )
        .await
        .map(Json)
        .map_err(|e| e.to_string())
    }
    pub async fn delete_smtp_settings(
        Path(id): Path<i64>,
        AuthUser(_): AuthUser,
        State(pool): State<Arc<SqlitePool>>,
    ) -> Result<(), String> {
        let repo = SmtpSettingsRepository { db: &pool };
        repo.delete(id).await.map_err(|e| e.to_string())
    }
}
// --- app_with_state ---
pub fn error_response(status: StatusCode, message: &str) -> axum::response::Response {
    (status, Json(json!({"error": message}))).into_response()
}

pub async fn not_found() -> axum::response::Response {
    error_response(StatusCode::NOT_FOUND, "Not Found")
}

pub fn app_with_state(pool: std::sync::Arc<SqlitePool>) -> Router {
    Router::new()
        .route("/health", get(health::health_handler))
        .nest(
            "/api/users",
            Router::new()
                .route("/", get(users_api::list_users).post(users_api::create_user))
                .route(
                    "/{id}",
                    get(users_api::get_user)
                        .put(users_api::update_user)
                        .delete(users_api::delete_user),
                ),
        )
        .nest(
            "/api/locations",
            Router::new()
                .route(
                    "/",
                    get(locations_api::list_locations).post(locations_api::create_location),
                )
                .route(
                    "/{id}",
                    get(locations_api::get_location)
                        .put(locations_api::update_location)
                        .delete(locations_api::delete_location),
                ),
        )
        .nest(
            "/api/weather-thresholds",
            Router::new()
                .route(
                    "/",
                    get(thresholds_api::list_thresholds).post(thresholds_api::create_threshold),
                )
                .route(
                    "/{id}",
                    get(thresholds_api::get_threshold)
                        .put(thresholds_api::update_threshold)
                        .delete(thresholds_api::delete_threshold),
                ),
        )
        .nest(
            "/api/ntfy-settings",
            Router::new()
                .route("/me", get(notifications_api::get_ntfy_settings))
                .route("/", post(notifications_api::create_ntfy_settings))
                .route(
                    "/{id}",
                    put(notifications_api::update_ntfy_settings)
                        .delete(notifications_api::delete_ntfy_settings),
                ),
        )
        .nest(
            "/api/smtp-settings",
            Router::new()
                .route("/me", get(notifications_api::get_smtp_settings))
                .route("/", post(notifications_api::create_smtp_settings))
                .route(
                    "/{id}",
                    put(notifications_api::update_smtp_settings)
                        .delete(notifications_api::delete_smtp_settings),
                ),
        )
        .fallback(not_found)
        .with_state(pool)
}

use std::env;
use std::net::SocketAddr;
use std::sync::Arc;
use tokio::fs;
use uuid::Uuid;

#[tokio::main]
async fn main() {
    // Set up database path
    let db_path =
        env::var("DATABASE_URL").unwrap_or_else(|_| "sqlite://./data/silmataivas.db".to_string());
    // Ensure data directory exists
    let _ = fs::create_dir_all("./data").await;
    // Connect to SQLite
    let pool = SqlitePool::connect(&db_path)
        .await
        .expect("Failed to connect to DB");

    // Create initial admin user if none exists
    {
        let repo = users::UserRepository { db: &pool };
        match repo.any_admin_exists().await {
            Ok(false) => {
                let admin_token =
                    env::var("ADMIN_TOKEN").unwrap_or_else(|_| Uuid::new_v4().to_string());
                match repo
                    .create_user(Some(admin_token.clone()), Some(users::UserRole::Admin))
                    .await
                {
                    Ok(_) => println!("Initial admin user created. Token: {admin_token}"),
                    Err(e) => eprintln!("Failed to create initial admin user: {e}"),
                }
            }
            Ok(true) => {
                // At least one admin exists, do nothing
            }
            Err(e) => {
                eprintln!("Failed to check for existing admin users: {e}");
            }
        }
    }

    let app = app_with_state(Arc::new(pool));
    let addr = SocketAddr::from(([0, 0, 0, 0], 4000));
    let listener = tokio::net::TcpListener::bind(addr)
        .await
        .expect("Failed to bind address");
    println!("Listening on {}", listener.local_addr().unwrap());
    axum::serve(listener, app).await.unwrap();
}

#[cfg(test)]
mod tests {
    use super::*;
    use axum::body::Body;
    use axum::body::to_bytes;
    use axum::http::{Request, StatusCode};
    use tower::ServiceExt; // for `oneshot`

    #[tokio::test]
    async fn test_health_endpoint() {
        let app = app_with_state(std::sync::Arc::new(
            sqlx::SqlitePool::connect("sqlite::memory:").await.unwrap(),
        ));
        let response = app
            .oneshot(
                Request::builder()
                    .uri("/health")
                    .body(Body::empty())
                    .unwrap(),
            )
            .await
            .unwrap();
        assert_eq!(response.status(), StatusCode::OK);
        let body = to_bytes(response.into_body(), 1024).await.unwrap();
        assert_eq!(&body[..], b"{\"status\":\"ok\"}");
    }
}