#![allow(clippy::too_many_arguments)]

#[macro_use]
extern crate diesel;
extern crate rayon;

use actix_web::web::Data;
use actix_web_prom::PrometheusMetricsBuilder;
use diesel_migrations::{EmbeddedMigrations, MigrationHarness, embed_migrations};
use std::collections::HashMap;
use std::env;
use std::sync::{Arc, Mutex};

use actix_cors::Cors;
use actix_governor::{Governor, GovernorConfigBuilder};
use actix_multipart as mp;
use actix_web::{App, HttpResponse, HttpServer, middleware, web};
use diesel::sqlite::Sqlite;
use std::error::Error;

use crate::ai::InsightGenerator;
use crate::auth::login;
use crate::data::*;
use crate::database::*;
use crate::files::{RealFileSystem, move_file};
use crate::service::ServiceBuilder;
use crate::state::AppState;
use crate::tags::*;
use crate::video::actors::ScanDirectoryMessage;
use log::{error, info};

mod ai;
mod auth;
mod backfill;
mod content_hash;
mod data;
mod database;
mod date_resolver;
mod duplicates;
mod error;
mod exif;
mod face_watch;
mod faces;
mod file_scan;
mod file_types;
mod files;
mod geo;
mod handlers;
mod libraries;
mod library_maintenance;
mod perceptual_hash;
mod state;
mod tags;
mod thumbnails;
mod utils;
mod video;
mod watcher;

mod knowledge;
mod memories;
mod otel;
mod personas;
mod service;
#[cfg(test)]
mod testhelpers;

pub const MIGRATIONS: EmbeddedMigrations = embed_migrations!();

fn main() -> std::io::Result<()> {
    if let Err(err) = dotenv::dotenv() {
        println!("Error parsing .env {:?}", err);
    }

    run_migrations(&mut connect()).expect("Failed to run migrations");

    let system = actix::System::new();
    system.block_on(async {
        // Just use basic logger when running a non-release build
        #[cfg(debug_assertions)]
        {
            env_logger::init();
        }
        #[cfg(not(debug_assertions))]
        {
            otel::init_logs();
            otel::init_tracing();
        }

        // AppState construction loads (and seeds if needed) the libraries
        // table; we use that list to drive the initial thumbnail sweep.
        let app_data = Data::new(AppState::default());

        // Kick thumbnail generation onto a background thread so the HTTP
        // server can accept traffic while large libraries are backfilling.
        // Existing thumbs are re-used (exists() check inside the walk),
        // so missed files are filled in over successive scans.
        {
            let libs = app_data.libraries.clone();
            let excluded = app_data.excluded_dirs.clone();
            std::thread::spawn(move || {
                thumbnails::create_thumbnails(&libs, &excluded);
            });
        }
        // generate_video_gifs().await;

        let labels = HashMap::new();
        let prometheus = PrometheusMetricsBuilder::new("api")
            .const_labels(labels)
            .build()
            .expect("Unable to build prometheus metrics middleware");

        prometheus
            .registry
            .register(Box::new(thumbnails::IMAGE_GAUGE.clone()))
            .unwrap();
        prometheus
            .registry
            .register(Box::new(thumbnails::VIDEO_GAUGE.clone()))
            .unwrap();

        let app_state = app_data.clone();
        for lib in &app_state.libraries {
            app_state.playlist_manager.do_send(ScanDirectoryMessage {
                directory: lib.root_path.clone(),
            });
        }

        // Start file watcher with playlist manager and preview generator
        let playlist_mgr_for_watcher = app_state.playlist_manager.as_ref().clone();
        let preview_gen_for_watcher = app_state.preview_clip_generator.as_ref().clone();
        watcher::watch_files(
            app_state.libraries.clone(),
            playlist_mgr_for_watcher,
            preview_gen_for_watcher,
            app_state.face_client.clone(),
            app_state.excluded_dirs.clone(),
            app_state.library_health.clone(),
        );

        // Start orphaned playlist cleanup job. Multi-library aware: walks
        // every configured library when looking for the source video, and
        // skips the whole cycle while any library is stale (a missing
        // source is indistinguishable from a transiently-unmounted share).
        watcher::cleanup_orphaned_playlists(
            app_state.libraries.clone(),
            app_state.excluded_dirs.clone(),
            app_state.library_health.clone(),
        );

        // Spawn background job to generate daily conversation summaries
        {
            use crate::ai::generate_daily_summaries;
            use crate::database::{DailySummaryDao, SqliteDailySummaryDao};
            use chrono::NaiveDate;

            // Configure date range for summary generation
            // Default: August 2024 ±30 days (July 1 - September 30, 2024)
            // To expand: change start_date and end_date
            let start_date = Some(NaiveDate::from_ymd_opt(2015, 10, 1).unwrap());
            let end_date = Some(NaiveDate::from_ymd_opt(2020, 1, 1).unwrap());

            // let contacts_to_summarize = vec!["Domenique", "Zach", "Paul"]; // Add more contacts as needed
            let contacts_to_summarize = vec![]; // Add more contacts as needed

            let ollama = app_state.ollama.clone();
            let sms_client = app_state.sms_client.clone();

            for contact in contacts_to_summarize {
                let ollama_clone = ollama.clone();
                let sms_client_clone = sms_client.clone();
                let summary_dao: Arc<Mutex<Box<dyn DailySummaryDao>>> =
                    Arc::new(Mutex::new(Box::new(SqliteDailySummaryDao::new())));

                let start = start_date;
                let end = end_date;

                tokio::spawn(async move {
                    info!("Starting daily summary generation for {}", contact);
                    if let Err(e) = generate_daily_summaries(
                        contact,
                        start,
                        end,
                        &ollama_clone,
                        &sms_client_clone,
                        summary_dao,
                    )
                    .await
                    {
                        error!("Daily summary generation failed for {}: {:?}", contact, e);
                    } else {
                        info!("Daily summary generation completed for {}", contact);
                    }
                });
            }
        }

        HttpServer::new(move || {
            let user_dao = SqliteUserDao::new();
            let favorites_dao = SqliteFavoriteDao::new();
            let tag_dao = SqliteTagDao::default();
            let exif_dao = SqliteExifDao::new();
            let insight_dao = SqliteInsightDao::new();
            let preview_dao = SqlitePreviewDao::new();
            let face_dao = faces::SqliteFaceDao::new();
            let cors = Cors::default()
                .allowed_origin_fn(|origin, _req_head| {
                    // Allow all origins in development, or check against CORS_ALLOWED_ORIGINS env var
                    if let Ok(allowed_origins) = env::var("CORS_ALLOWED_ORIGINS") {
                        allowed_origins
                            .split(',')
                            .any(|allowed| origin.as_bytes() == allowed.trim().as_bytes())
                    } else {
                        // Default: allow all origins if not configured
                        true
                    }
                })
                .allowed_methods(vec!["GET", "POST", "PUT", "DELETE", "OPTIONS"])
                .allowed_headers(vec![
                    actix_web::http::header::AUTHORIZATION,
                    actix_web::http::header::ACCEPT,
                    actix_web::http::header::CONTENT_TYPE,
                ])
                .supports_credentials()
                .max_age(3600);

            // Configure rate limiting for login endpoint (2 requests/sec, burst of 5)
            let governor_conf = GovernorConfigBuilder::default()
                .per_second(2)
                .burst_size(5)
                .finish()
                .unwrap();

            App::new()
                .wrap(middleware::Logger::default())
                .wrap(cors)
                .service(
                    web::resource("/login")
                        .wrap(Governor::new(&governor_conf))
                        .route(web::post().to(login::<SqliteUserDao>)),
                )
                .service(
                    web::resource("/photos")
                        .route(web::get().to(files::list_photos::<SqliteTagDao, RealFileSystem>)),
                )
                .service(
                    web::resource("/photos/gps-summary")
                        .route(web::get().to(files::get_gps_summary)),
                )
                .service(
                    web::resource("/photos/exif").route(web::get().to(files::list_exif_summary)),
                )
                .service(web::resource("/file/move").post(move_file::<RealFileSystem>))
                .service(handlers::image::get_image)
                .service(handlers::image::upload_image)
                .service(handlers::video::generate_video)
                .service(handlers::video::stream_video)
                .service(handlers::video::get_video_preview)
                .service(handlers::video::get_preview_status)
                .service(handlers::video::get_video_part)
                .service(handlers::favorites::favorites)
                .service(handlers::favorites::put_add_favorite)
                .service(handlers::favorites::delete_favorite)
                .service(handlers::image::get_file_metadata)
                .service(handlers::image::set_image_gps)
                .service(handlers::image::set_image_date)
                .service(handlers::image::clear_image_date)
                .service(handlers::image::get_full_exif)
                .service(memories::list_memories)
                .service(ai::generate_insight_handler)
                .service(ai::generate_agentic_insight_handler)
                .service(ai::get_insight_handler)
                .service(ai::delete_insight_handler)
                .service(ai::get_all_insights_handler)
                .service(ai::get_available_models_handler)
                .service(ai::get_openrouter_models_handler)
                .service(ai::chat_turn_handler)
                .service(ai::chat_stream_handler)
                .service(ai::chat_history_handler)
                .service(ai::chat_rewind_handler)
                .service(ai::rate_insight_handler)
                .service(ai::export_training_data_handler)
                .service(libraries::list_libraries)
                .add_feature(add_tag_services::<_, SqliteTagDao>)
                .add_feature(knowledge::add_knowledge_services::<_, SqliteKnowledgeDao>)
                .add_feature(personas::add_persona_services)
                .add_feature(faces::add_face_services::<_, faces::SqliteFaceDao>)
                .add_feature(duplicates::add_duplicate_services)
                .app_data(app_data.clone())
                .app_data::<Data<RealFileSystem>>(Data::new(RealFileSystem::new(
                    app_data.base_path.clone(),
                )))
                .app_data::<Data<Mutex<SqliteUserDao>>>(Data::new(Mutex::new(user_dao)))
                .app_data::<Data<Mutex<Box<dyn FavoriteDao>>>>(Data::new(Mutex::new(Box::new(
                    favorites_dao,
                ))))
                .app_data::<Data<Mutex<SqliteTagDao>>>(Data::new(Mutex::new(tag_dao)))
                .app_data::<Data<Mutex<Box<dyn ExifDao>>>>(Data::new(Mutex::new(Box::new(
                    exif_dao,
                ))))
                .app_data::<Data<Mutex<Box<dyn InsightDao>>>>(Data::new(Mutex::new(Box::new(
                    insight_dao,
                ))))
                .app_data::<Data<Mutex<Box<dyn PreviewDao>>>>(Data::new(Mutex::new(Box::new(
                    preview_dao,
                ))))
                .app_data::<Data<Mutex<SqliteKnowledgeDao>>>(Data::new(Mutex::new(
                    SqliteKnowledgeDao::new(),
                )))
                .app_data::<Data<Mutex<Box<dyn database::PersonaDao>>>>(Data::new(Mutex::new(
                    Box::new(database::SqlitePersonaDao::new()),
                )))
                .app_data::<Data<Mutex<faces::SqliteFaceDao>>>(Data::new(Mutex::new(face_dao)))
                .app_data::<Data<crate::ai::face_client::FaceClient>>(Data::new(
                    app_data.face_client.clone(),
                ))
                .app_data(mp::form::MultipartFormConfig::default().total_limit(1024 * 1024 * 1024)) // 1GB upload limit
                .app_data(web::JsonConfig::default().error_handler(|err, req| {
                    let detail = err.to_string();
                    log::warn!(
                        "JSON parse error on {} {}: {}",
                        req.method(),
                        req.uri(),
                        detail
                    );
                    let response =
                        HttpResponse::BadRequest().json(serde_json::json!({"error": detail}));
                    actix_web::error::InternalError::from_response(err, response).into()
                }))
                .app_data::<Data<InsightGenerator>>(Data::new(app_data.insight_generator.clone()))
                .wrap(prometheus.clone())
        })
        .bind(dotenv::var("BIND_URL").unwrap())?
        .bind("localhost:8088")?
        .run()
        .await
    })
}

fn run_migrations(
    connection: &mut impl MigrationHarness<Sqlite>,
) -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
    connection.run_pending_migrations(MIGRATIONS)?;

    Ok(())
}