use lazy_static::lazy_static;
use num_enum::{IntoPrimitive, TryFromPrimitive};
use satrs::events::{EventU32TypedSev, SeverityInfo};
use satrs::spacepackets::PacketId;
use satrs_mib::res_code::ResultU16Info;
use satrs_mib::resultcode;
use std::net::Ipv4Addr;
use std::path::{Path, PathBuf};

pub const STOP_FILE_NAME: &str = "stop-experiment";
pub const CONFIG_FILE_NAME: &str = "exp278.toml";
pub const HOME_FOLDER_EXPERIMENT: &str = "/home/exp278";
pub const LOG_FOLDER: &str = "logs";

pub const OBSW_SERVER_ADDR: Ipv4Addr = Ipv4Addr::UNSPECIFIED;
pub const SERVER_PORT: u16 = 7301;
pub const TCP_SPP_SERVER_PORT: u16 = 4096;
pub const EXPERIMENT_ID: u32 = 278;
pub const EXPERIMENT_APID: u16 = 1024 + EXPERIMENT_ID as u16;
pub const EXPERIMENT_PACKET_ID: PacketId = PacketId::new_for_tc(true, EXPERIMENT_APID);
pub const VALID_PACKET_ID_LIST: &[PacketId] = &[PacketId::new_for_tc(true, EXPERIMENT_APID)];

// TODO: Would be nice if this can be commanded as well..
/// Can be enabled to print all SPP packets received from the SPP server on port 4096.
pub const SPP_CLIENT_WIRETAPPING_RX: bool = true;
pub const SPP_CLIENT_WIRETAPPING_TX: bool = true;

#[derive(Copy, Clone, PartialEq, Eq, Debug, TryFromPrimitive, IntoPrimitive)]
#[repr(u8)]
pub enum CustomPusServiceId {
    Mode = 200,
    Health = 201,
}

#[derive(Debug)]
pub enum GroupId {
    Tmtc = 0,
    Hk = 1,
    Mode = 2,
    Action = 3,
}

pub const TEST_EVENT: EventU32TypedSev<SeverityInfo> =
    EventU32TypedSev::<SeverityInfo>::new(GroupId::Tmtc as u16, 0);

lazy_static! {
    pub static ref HOME_PATH: PathBuf = {
        let mut home_path = PathBuf::new();
        let home_path_default = homedir::get_my_home()
            .expect("Getting home dir from OS failed.")
            .expect("No home dir found.");

        home_path.push(if Path::new(HOME_FOLDER_EXPERIMENT).exists() {
            HOME_FOLDER_EXPERIMENT
        } else {
            home_path_default
                .to_str()
                .expect("Error converting to string.")
        });
        home_path
    };
}

pub mod cfg_file {
    use std::{
        fs::File,
        io::Read,
        path::{Path, PathBuf},
    };

    use super::{CONFIG_FILE_NAME, HOME_PATH, TCP_SPP_SERVER_PORT};

    pub const SPP_CLIENT_PORT_CFG_KEY: &str = "tcp_spp_server_port";

    #[derive(Debug)]
    pub struct AppCfg {
        pub tcp_spp_server_port: u16,
    }

    impl Default for AppCfg {
        fn default() -> Self {
            Self {
                tcp_spp_server_port: TCP_SPP_SERVER_PORT,
            }
        }
    }

    pub fn create_app_config() -> AppCfg {
        let mut cfg_path = HOME_PATH.clone();
        cfg_path.push(CONFIG_FILE_NAME);
        let cfg_path_home = cfg_path.as_path();
        let relevant_path = if Path::new(CONFIG_FILE_NAME).exists() {
            Some(PathBuf::from(Path::new(CONFIG_FILE_NAME)))
        } else if cfg_path_home.exists() {
            Some(PathBuf::from(cfg_path_home))
        } else {
            None
        };

        let mut app_cfg = AppCfg::default();
        if relevant_path.is_none() {
            log::warn!("No config file found, using default values");
            return app_cfg;
        }
        let relevant_path = relevant_path.unwrap();
        match File::open(relevant_path.as_path()) {
            Ok(mut file) => {
                let mut toml_str = String::new();
                match file.read_to_string(&mut toml_str) {
                    Ok(_size) => match toml_str.parse::<toml::Table>() {
                        Ok(table) => {
                            handle_config_file_table(table, &mut app_cfg);
                        }
                        Err(e) => log::error!("error parsing TOML config file: {e}"),
                    },
                    Err(e) => log::error!("error reading TOML config file: {e}"),
                }
            }
            Err(e) => log::error!("error opening TOML config file: {e}"),
        }
        app_cfg
    }

    #[allow(clippy::collapsible_match)]
    pub fn handle_config_file_table(table: toml::Table, app_cfg: &mut AppCfg) {
        if let Some(value) = table.get(SPP_CLIENT_PORT_CFG_KEY) {
            if let toml::Value::Integer(port) = value {
                if *port < 0 {
                    log::warn!("invalid port value, is negative");
                } else {
                    app_cfg.tcp_spp_server_port = *port as u16
                }
            }
        }
    }
}

pub mod tmtc_err {
    use super::*;
    use satrs::res_code::ResultU16;

    #[resultcode]
    pub const INVALID_PUS_SERVICE: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 0);
    #[resultcode]
    pub const INVALID_PUS_SUBSERVICE: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 1);
    #[resultcode]
    pub const PUS_SERVICE_NOT_IMPLEMENTED: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 2);
    #[resultcode]
    pub const PUS_SUBSERVICE_NOT_IMPLEMENTED: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 3);
    #[resultcode]
    pub const UNKNOWN_TARGET_ID: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 4);
    #[resultcode]
    pub const ROUTING_ERROR: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 5);
    #[resultcode(info = "Request timeout for targeted PUS request. P1: Request ID. P2: Target ID")]
    pub const REQUEST_TIMEOUT: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 6);

    #[resultcode(
        info = "Not enough data inside the TC application data field. Optionally includes: \
          8 bytes of failure data containing 2 failure parameters, \
          P1 (u32 big endian): Expected data length, P2: Found data length"
    )]
    pub const NOT_ENOUGH_APP_DATA: ResultU16 = ResultU16::new(GroupId::Tmtc as u8, 2);

    pub const TMTC_RESULTS: &[ResultU16Info] = &[
        INVALID_PUS_SERVICE_EXT,
        INVALID_PUS_SUBSERVICE_EXT,
        PUS_SERVICE_NOT_IMPLEMENTED_EXT,
        UNKNOWN_TARGET_ID_EXT,
        ROUTING_ERROR_EXT,
        NOT_ENOUGH_APP_DATA_EXT,
    ];
}

pub mod action_err {
    use super::*;
    use satrs::res_code::ResultU16;

    #[resultcode]
    pub const INVALID_ACTION_ID: ResultU16 = ResultU16::new(GroupId::Action as u8, 0);

    pub const ACTION_RESULTS: &[ResultU16Info] = &[INVALID_ACTION_ID_EXT];
}

pub mod hk_err {
    use super::*;
    use satrs::res_code::ResultU16;

    #[resultcode]
    pub const TARGET_ID_MISSING: ResultU16 = ResultU16::new(GroupId::Hk as u8, 0);
    #[resultcode]
    pub const UNIQUE_ID_MISSING: ResultU16 = ResultU16::new(GroupId::Hk as u8, 1);
    #[resultcode]
    pub const UNKNOWN_TARGET_ID: ResultU16 = ResultU16::new(GroupId::Hk as u8, 2);
    #[resultcode]
    pub const COLLECTION_INTERVAL_MISSING: ResultU16 = ResultU16::new(GroupId::Hk as u8, 3);

    pub const HK_ERR_RESULTS: &[ResultU16Info] = &[
        TARGET_ID_MISSING_EXT,
        UNKNOWN_TARGET_ID_EXT,
        UNKNOWN_TARGET_ID_EXT,
        COLLECTION_INTERVAL_MISSING_EXT,
    ];
}

pub mod mode_err {
    use super::*;
    use satrs::res_code::ResultU16;

    #[resultcode]
    pub const WRONG_MODE: ResultU16 = ResultU16::new(GroupId::Mode as u8, 0);
}

pub mod pool {
    use satrs::pool::{StaticMemoryPool, StaticPoolConfig};

    pub fn create_sched_tc_pool() -> StaticMemoryPool {
        StaticMemoryPool::new(StaticPoolConfig::new(
            vec![
                (100, 32),
                (50, 64),
                (50, 128),
                (50, 256),
                (50, 1024),
                (100, 2048),
            ],
            true,
        ))
    }
}

pub mod components {
    use satrs::request::UniqueApidTargetId;

    use super::EXPERIMENT_APID;

    // Component IDs for components with the PUS APID.
    #[derive(Copy, Clone, PartialEq, Eq)]
    pub enum UniqueId {
        Controller = 0,
        PusEventManagement = 1,
        PusRouting = 2,
        PusTest = 3,
        PusAction = 4,
        PusMode = 5,
        PusHk = 6,
        UdpServer = 7,
        TcpServer = 8,
        TcpSppClient = 9,
        PusScheduler = 10,
        CameraHandler = 11,
    }

    pub const CONTROLLER_ID: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::Controller as u32);
    pub const PUS_ACTION_SERVICE: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusAction as u32);
    pub const PUS_EVENT_MANAGEMENT: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusEventManagement as u32);
    pub const PUS_ROUTING_SERVICE: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusRouting as u32);
    pub const PUS_TEST_SERVICE: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusTest as u32);
    pub const PUS_MODE_SERVICE: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusMode as u32);
    pub const PUS_SCHEDULER_SERVICE: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusScheduler as u32);
    pub const PUS_HK_SERVICE: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::PusHk as u32);
    pub const UDP_SERVER: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::UdpServer as u32);
    pub const TCP_SERVER: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::TcpServer as u32);
    pub const TCP_SPP_CLIENT: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::TcpSppClient as u32);
    pub const CAMERA_HANDLER: UniqueApidTargetId =
        UniqueApidTargetId::new(EXPERIMENT_APID, UniqueId::CameraHandler as u32);
}

pub mod tasks {
    use std::time::Duration;

    pub const FREQ_MS_UDP_TMTC: u64 = 200;
    pub const FREQ_MS_EVENT_HANDLING: u64 = 400;
    pub const FREQ_MS_AOCS: u64 = 500;
    pub const FREQ_MS_PUS_STACK: u64 = 200;
    pub const FREQ_MS_CTRL: u64 = 400;
    pub const FREQ_MS_CAMERA_HANDLING: u64 = 400;

    pub const STOP_CHECK_FREQUENCY_MS: u64 = 400;
    pub const STOP_CHECK_FREQUENCY: Duration = Duration::from_millis(STOP_CHECK_FREQUENCY_MS);
}