use std::collections::{BTreeMap, BTreeSet};
use std::sync::Arc;

use chrono::{DateTime, Utc};
use emver::VersionRange;
use isocountry::CountryCode;
use patch_db::json_ptr::JsonPointer;
use patch_db::{HasModel, Map, MapModel, OptionModel};
use reqwest::Url;
use serde::{Deserialize, Serialize};
use serde_json::Value;
use torut::onion::TorSecretKeyV3;

use crate::config::spec::{PackagePointerSpec, SystemPointerSpec};
use crate::install::progress::InstallProgress;
use crate::net::interface::InterfaceId;
use crate::s9pk::manifest::{Manifest, ManifestModel, PackageId};
use crate::status::health_check::HealthCheckId;
use crate::status::Status;
use crate::util::Version;
use crate::version::{Current, VersionT};

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct Database {
    #[model]
    pub server_info: ServerInfo,
    #[model]
    pub package_data: AllPackageData,
    #[model]
    pub recovered_packages: BTreeMap<PackageId, RecoveredPackageInfo>,
    pub ui: Value,
}
impl Database {
    pub fn init(
        id: String,
        hostname: &str,
        tor_key: &TorSecretKeyV3,
        password_hash: String,
    ) -> Self {
        // TODO
        Database {
            server_info: ServerInfo {
                id,
                version: Current::new().semver().into(),
                last_backup: None,
                last_wifi_region: None,
                eos_version_compat: Current::new().compat().clone(),
                lan_address: format!("https://{}.local", hostname).parse().unwrap(),
                tor_address: format!("http://{}", tor_key.public().get_onion_address())
                    .parse()
                    .unwrap(),
                status_info: ServerStatus {
                    backup_progress: None,
                    updated: false,
                    update_progress: None,
                },
                wifi: WifiInfo {
                    ssids: Vec::new(),
                    connected: None,
                    selected: None,
                },
                unread_notification_count: 0,
                connection_addresses: ConnectionAddresses {
                    tor: Vec::new(),
                    clearnet: Vec::new(),
                },
                password_hash,
            },
            package_data: AllPackageData::default(),
            recovered_packages: BTreeMap::new(),
            ui: Value::Object(Default::default()),
        }
    }
}
impl DatabaseModel {
    pub fn new() -> Self {
        Self::from(JsonPointer::default())
    }
}

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct ServerInfo {
    pub id: String,
    pub version: Version,
    pub last_backup: Option<DateTime<Utc>>,
    /// Used in the wifi to determine the region to set the system to
    pub last_wifi_region: Option<CountryCode>,
    pub eos_version_compat: VersionRange,
    pub lan_address: Url,
    pub tor_address: Url,
    #[model]
    #[serde(default)]
    pub status_info: ServerStatus,
    pub wifi: WifiInfo,
    pub unread_notification_count: u64,
    pub connection_addresses: ConnectionAddresses,
    pub password_hash: String,
}

#[derive(Debug, Default, Deserialize, Serialize, HasModel)]
pub struct BackupProgress {
    pub complete: bool,
}

#[derive(Debug, Default, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct ServerStatus {
    #[model]
    pub backup_progress: Option<BTreeMap<PackageId, BackupProgress>>,
    pub updated: bool,
    #[model]
    pub update_progress: Option<UpdateProgress>,
}

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct UpdateProgress {
    pub size: Option<u64>,
    pub downloaded: u64,
}

#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "kebab-case")]
pub struct WifiInfo {
    pub ssids: Vec<String>,
    pub selected: Option<String>,
    pub connected: Option<String>,
}

#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "kebab-case")]
pub struct ServerSpecs {
    pub cpu: String,
    pub disk: String,
    pub memory: String,
}

#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "kebab-case")]
pub struct ConnectionAddresses {
    pub tor: Vec<String>,
    pub clearnet: Vec<String>,
}

#[derive(Debug, Default, Deserialize, Serialize)]
pub struct AllPackageData(pub BTreeMap<PackageId, PackageDataEntry>);
impl Map for AllPackageData {
    type Key = PackageId;
    type Value = PackageDataEntry;
    fn get(&self, key: &Self::Key) -> Option<&Self::Value> {
        self.0.get(key)
    }
}
impl HasModel for AllPackageData {
    type Model = MapModel<Self>;
}

#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "kebab-case")]
pub struct StaticFiles {
    license: String,
    instructions: String,
    icon: String,
}
impl StaticFiles {
    pub fn local(id: &PackageId, version: &Version, icon_type: &str) -> Self {
        StaticFiles {
            license: format!("/public/package-data/{}/{}/LICENSE.md", id, version),
            instructions: format!("/public/package-data/{}/{}/INSTRUCTIONS.md", id, version),
            icon: format!("/public/package-data/{}/{}/icon.{}", id, version, icon_type),
        }
    }
}

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(tag = "state")]
#[serde(rename_all = "kebab-case")]
pub enum PackageDataEntry {
    #[serde(rename_all = "kebab-case")]
    Installing {
        static_files: StaticFiles,
        manifest: Manifest,
        install_progress: Arc<InstallProgress>,
    },
    #[serde(rename_all = "kebab-case")]
    Updating {
        static_files: StaticFiles,
        manifest: Manifest,
        installed: InstalledPackageDataEntry,
        install_progress: Arc<InstallProgress>,
    },
    #[serde(rename_all = "kebab-case")]
    Restoring {
        static_files: StaticFiles,
        manifest: Manifest,
        install_progress: Arc<InstallProgress>,
    },
    #[serde(rename_all = "kebab-case")]
    Removing {
        static_files: StaticFiles,
        manifest: Manifest,
        removing: InstalledPackageDataEntry,
    },
    #[serde(rename_all = "kebab-case")]
    Installed {
        static_files: StaticFiles,
        manifest: Manifest,
        installed: InstalledPackageDataEntry,
    },
}
impl PackageDataEntry {
    pub fn installed(&self) -> Option<&InstalledPackageDataEntry> {
        match self {
            Self::Installing { .. } | Self::Restoring { .. } | Self::Removing { .. } => None,
            Self::Updating { installed, .. } | Self::Installed { installed, .. } => Some(installed),
        }
    }
    pub fn installed_mut(&mut self) -> Option<&mut InstalledPackageDataEntry> {
        match self {
            Self::Installing { .. } | Self::Restoring { .. } | Self::Removing { .. } => None,
            Self::Updating { installed, .. } | Self::Installed { installed, .. } => Some(installed),
        }
    }
    pub fn into_installed(self) -> Option<InstalledPackageDataEntry> {
        match self {
            Self::Installing { .. } | Self::Restoring { .. } | Self::Removing { .. } => None,
            Self::Updating { installed, .. } | Self::Installed { installed, .. } => Some(installed),
        }
    }
    pub fn manifest(self) -> Manifest {
        match self {
            PackageDataEntry::Installing { manifest, .. } => manifest,
            PackageDataEntry::Updating { manifest, .. } => manifest,
            PackageDataEntry::Restoring { manifest, .. } => manifest,
            PackageDataEntry::Removing { manifest, .. } => manifest,
            PackageDataEntry::Installed { manifest, .. } => manifest,
        }
    }
}
impl PackageDataEntryModel {
    pub fn installed(self) -> OptionModel<InstalledPackageDataEntry> {
        self.0.child("installed").into()
    }
    pub fn removing(self) -> OptionModel<InstalledPackageDataEntry> {
        self.0.child("removing").into()
    }
    pub fn install_progress(self) -> OptionModel<InstallProgress> {
        self.0.child("install-progress").into()
    }
    pub fn manifest(self) -> ManifestModel {
        self.0.child("manifest").into()
    }
}

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct InstalledPackageDataEntry {
    #[model]
    pub status: Status,
    pub marketplace_url: Option<Url>,
    #[serde(default)]
    #[serde(with = "crate::util::serde::ed25519_pubkey")]
    pub developer_key: ed25519_dalek::PublicKey,
    #[model]
    pub manifest: Manifest,
    pub last_backup: Option<DateTime<Utc>>,
    #[model]
    pub system_pointers: Vec<SystemPointerSpec>,
    #[model]
    pub dependency_info: BTreeMap<PackageId, StaticDependencyInfo>,
    #[model]
    pub current_dependents: CurrentDependents,
    #[model]
    pub current_dependencies: CurrentDependencies,
    #[model]
    pub interface_addresses: InterfaceAddressMap,
}

#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct CurrentDependents(pub BTreeMap<PackageId, CurrentDependencyInfo>);
impl CurrentDependents {
    pub fn map(
        mut self,
        transform: impl Fn(
            BTreeMap<PackageId, CurrentDependencyInfo>,
        ) -> BTreeMap<PackageId, CurrentDependencyInfo>,
    ) -> Self {
        self.0 = transform(self.0);
        self
    }
}
impl Map for CurrentDependents {
    type Key = PackageId;
    type Value = CurrentDependencyInfo;
    fn get(&self, key: &Self::Key) -> Option<&Self::Value> {
        self.0.get(key)
    }
}
impl HasModel for CurrentDependents {
    type Model = MapModel<Self>;
}

#[derive(Debug, Clone, Default, Deserialize, Serialize)]
pub struct CurrentDependencies(pub BTreeMap<PackageId, CurrentDependencyInfo>);
impl CurrentDependencies {
    pub fn map(
        mut self,
        transform: impl Fn(
            BTreeMap<PackageId, CurrentDependencyInfo>,
        ) -> BTreeMap<PackageId, CurrentDependencyInfo>,
    ) -> Self {
        self.0 = transform(self.0);
        self
    }
}
impl Map for CurrentDependencies {
    type Key = PackageId;
    type Value = CurrentDependencyInfo;
    fn get(&self, key: &Self::Key) -> Option<&Self::Value> {
        self.0.get(key)
    }
}
impl HasModel for CurrentDependencies {
    type Model = MapModel<Self>;
}

#[derive(Clone, Debug, Default, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct StaticDependencyInfo {
    pub manifest: Option<Manifest>,
    pub icon: String,
}

#[derive(Clone, Debug, Default, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct CurrentDependencyInfo {
    pub pointers: Vec<PackagePointerSpec>,
    pub health_checks: BTreeSet<HealthCheckId>,
}

#[derive(Debug, Deserialize, Serialize)]
pub struct InterfaceAddressMap(pub BTreeMap<InterfaceId, InterfaceAddresses>);
impl Map for InterfaceAddressMap {
    type Key = InterfaceId;
    type Value = InterfaceAddresses;
    fn get(&self, key: &Self::Key) -> Option<&Self::Value> {
        self.0.get(key)
    }
}
impl HasModel for InterfaceAddressMap {
    type Model = MapModel<Self>;
}

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct InterfaceAddresses {
    #[model]
    pub tor_address: Option<String>,
    #[model]
    pub lan_address: Option<String>,
}

#[derive(Debug, Deserialize, Serialize, HasModel)]
#[serde(rename_all = "kebab-case")]
pub struct RecoveredPackageInfo {
    pub title: String,
    pub icon: String,
    pub version: Version,
}