/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2024 metamuffin <metamuffin.org>
*/
use crate::{stream::StreamFormat, user};
use bincode::{Decode, Encode};
#[cfg(feature = "rocket")]
use rocket::{FromFormField, UriDisplayQuery};
use serde::{Deserialize, Serialize};
use std::{
    collections::{HashMap, HashSet},
    fmt::Display,
};

#[rustfmt::skip]
#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode, Default)]
pub struct User {
    pub name: String,
    pub display_name: String,
    pub password: Vec<u8>,
    pub admin: bool,
    #[serde(default)] pub theme: Theme,
    #[serde(default)] pub player_preference: PlayerKind,
    #[serde(default)] pub native_secret: String,
    pub permissions: PermissionSet,
}

#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode)]
pub struct NodeUserData {
    pub watched: WatchedState,
    #[serde(default)]
    pub rating: i32,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Encode, Decode)]
#[serde(rename_all = "snake_case")]
pub enum WatchedState {
    None,
    Progress(f64),
    Watched,
    Pending,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct CreateSessionParams {
    pub username: String,
    pub password: String,
    pub expire: Option<i64>,
    pub drop_permissions: Option<HashSet<UserPermission>>,
}

#[derive(Debug, Clone, Copy, Serialize, Default, Deserialize, PartialEq, Encode, Decode)]
#[cfg_attr(feature = "rocket", derive(FromFormField, UriDisplayQuery))]
#[serde(rename_all = "snake_case")]
pub enum Theme {
    #[default]
    Dark,
    Light,
    Purple,
}

#[derive(Debug, Clone, Copy, Serialize, Default, Deserialize, PartialEq, Encode, Decode)]
#[cfg_attr(feature = "rocket", derive(FromFormField, UriDisplayQuery))]
#[serde(rename_all = "snake_case")]
pub enum PlayerKind {
    #[default]
    Browser,
    Native,
    NativeFullscreen,
}

impl Theme {
    pub const LIST: &'static [(Theme, &'static str)] = &[
        (Theme::Dark, "Dark"),
        (Theme::Light, "Light"),
        (Theme::Purple, "Purple"),
    ];
}
impl PlayerKind {
    pub const LIST: &'static [(PlayerKind, &'static str)] = &[
        (PlayerKind::Browser, "In-Browser"),
        (PlayerKind::Native, "Native"),
        (PlayerKind::NativeFullscreen, "Native (Fullscreen)"),
    ];
}

#[derive(Debug, Clone, Serialize, Deserialize, Default, Encode, Decode)]
pub struct PermissionSet(pub HashMap<UserPermission, bool>);

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash, Encode, Decode)]
#[serde(rename_all = "snake_case")]
pub enum UserPermission {
    Admin,
    // ManageUsers,
    // GenerateInvite,
    ManageSelf,

    AccessNode(String),
    StreamFormat(StreamFormat),
    Transcode,
    FederatedContent,
}

impl UserPermission {
    pub const ALL_ENUMERABLE: &'static [UserPermission] = {
        use UserPermission::*;
        &[
            Admin,
            Transcode,
            ManageSelf,
            FederatedContent,
            StreamFormat(user::StreamFormat::Original),
        ]
    };
    pub fn default_value(&self) -> bool {
        use user::StreamFormat::*;
        use UserPermission::*;
        matches!(
            self,
            Transcode
                | ManageSelf
                | FederatedContent
                | StreamFormat(
                    JhlsIndex | Jvtt | HlsMaster | HlsVariant | Matroska | Fragment | Webvtt
                )
        )
    }
}

impl Display for UserPermission {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(&match self {
            UserPermission::ManageSelf => "manage self (password, display name, etc.)".to_string(),
            UserPermission::FederatedContent => "access to federated content".to_string(),
            UserPermission::Admin => "administrative rights".to_string(),
            UserPermission::StreamFormat(StreamFormat::Original) => {
                "downloading the original media".to_string()
            }
            UserPermission::StreamFormat(StreamFormat::Matroska) => {
                "downloading a remuxed WebM/Matroska version of the media ".to_string()
            }
            UserPermission::StreamFormat(x) => {
                format!("downloading media via {x:?}")
            }
            UserPermission::Transcode => "transcoding".to_string(),
            // UserPermission::ManageUsers => format!("management of all users"),
            // UserPermission::GenerateInvite => format!("inviting new users"),
            UserPermission::AccessNode(s) => format!("access to library node {s:?}"),
        })
    }
}

impl Default for NodeUserData {
    fn default() -> Self {
        Self {
            watched: WatchedState::None,
            rating: 0,
        }
    }
}