// yt - A fully featured command line YouTube client
//
// Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
// SPDX-License-Identifier: GPL-3.0-or-later
//
// This file is part of Yt.
//
// You should have received a copy of the License along with this program.
// If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.

// `yt_dlp` named them like this.
#![allow(clippy::pub_underscore_fields)]

use std::{collections::HashMap, path::PathBuf};

use pyo3::{types::PyDict, Bound, PyResult, Python};
use serde::{Deserialize, Deserializer, Serialize};
use serde_json::Value;
use url::Url;

use crate::json_loads_str;

type Todo = String;
type Extractor = String;
type ExtractorKey = String;

// TODO: Change this to map `_type` to a structure of values, instead of the options <2024-05-27>
// And replace all the strings with better types (enums or urls)
#[derive(Debug, Deserialize, Serialize, PartialEq)]
#[serde(deny_unknown_fields)]
pub struct InfoJson {
    pub __files_to_move: Option<FilesToMove>,
    pub __last_playlist_index: Option<u32>,
    pub __post_extractor: Option<String>,
    pub __x_forwarded_for_ip: Option<String>,
    pub _filename: Option<PathBuf>,
    pub _format_sort_fields: Option<Vec<String>>,
    pub _has_drm: Option<Todo>,
    pub _type: Option<InfoType>,
    pub _version: Option<Version>,
    pub abr: Option<f64>,
    pub acodec: Option<String>,
    pub age_limit: Option<u32>,
    pub aspect_ratio: Option<f64>,
    pub asr: Option<u32>,
    pub audio_channels: Option<u32>,
    pub audio_ext: Option<String>,
    pub automatic_captions: Option<HashMap<String, Vec<Caption>>>,
    pub availability: Option<String>,
    pub average_rating: Option<String>,
    pub categories: Option<Vec<String>>,
    pub channel: Option<String>,
    pub channel_follower_count: Option<u32>,
    pub channel_id: Option<String>,
    pub channel_is_verified: Option<bool>,
    pub channel_url: Option<String>,
    pub chapters: Option<Vec<Chapter>>,
    pub comment_count: Option<u32>,
    pub comments: Option<Vec<Comment>>,
    pub concurrent_view_count: Option<u32>,
    pub description: Option<String>,
    pub display_id: Option<String>,
    pub downloader_options: Option<DownloaderOptions>,
    pub duration: Option<f64>,
    pub duration_string: Option<String>,
    pub dynamic_range: Option<String>,
    pub entries: Option<Vec<InfoJson>>,
    pub episode: Option<String>,
    pub episode_number: Option<u32>,
    pub epoch: Option<u32>,
    pub ext: Option<String>,
    pub extractor: Option<Extractor>,
    pub extractor_key: Option<ExtractorKey>,
    pub filename: Option<PathBuf>,
    pub filesize: Option<u64>,
    pub filesize_approx: Option<u64>,
    pub format: Option<String>,
    pub format_id: Option<String>,
    pub format_index: Option<u32>,
    pub format_note: Option<String>,
    pub formats: Option<Vec<Format>>,
    pub fps: Option<f64>,
    pub fulltitle: Option<String>,
    pub has_drm: Option<bool>,
    pub heatmap: Option<Vec<HeatMapEntry>>,
    pub height: Option<u32>,
    pub http_headers: Option<HttpHeader>,
    pub id: Option<String>,
    pub ie_key: Option<ExtractorKey>,
    pub is_live: Option<bool>,
    pub language: Option<String>,
    pub language_preference: Option<i32>,
    pub license: Option<Todo>,
    pub like_count: Option<u32>,
    pub live_status: Option<String>,
    pub location: Option<Todo>,
    pub manifest_url: Option<Url>,
    pub modified_date: Option<String>,
    pub n_entries: Option<u32>,
    pub original_url: Option<String>,
    pub playable_in_embed: Option<bool>,
    pub playlist: Option<Todo>,
    pub playlist_autonumber: Option<u32>,
    pub playlist_channel: Option<Todo>,
    pub playlist_channel_id: Option<Todo>,
    pub playlist_count: Option<u32>,
    pub playlist_id: Option<Todo>,
    pub playlist_index: Option<u64>,
    pub playlist_title: Option<Todo>,
    pub playlist_uploader: Option<Todo>,
    pub playlist_uploader_id: Option<Todo>,
    pub preference: Option<Todo>,
    pub protocol: Option<String>,
    pub quality: Option<f64>,
    pub release_date: Option<String>,
    pub release_timestamp: Option<u64>,
    pub release_year: Option<u32>,
    pub requested_downloads: Option<Vec<RequestedDownloads>>,
    pub requested_entries: Option<Vec<u32>>,
    pub requested_formats: Option<Vec<Format>>,
    pub requested_subtitles: Option<HashMap<String, Subtitle>>,
    pub resolution: Option<String>,
    pub season: Option<String>,
    pub season_number: Option<u32>,
    pub series: Option<String>,
    pub source_preference: Option<i32>,
    pub sponsorblock_chapters: Option<Vec<SponsorblockChapter>>,
    pub stretched_ratio: Option<Todo>,
    pub subtitles: Option<HashMap<String, Vec<Caption>>>,
    pub tags: Option<Vec<String>>,
    pub tbr: Option<f64>,
    pub thumbnail: Option<Url>,
    pub thumbnails: Option<Vec<ThumbNail>>,
    pub timestamp: Option<u64>,
    pub title: Option<String>,
    pub upload_date: Option<String>,
    pub uploader: Option<String>,
    pub uploader_id: Option<String>,
    pub uploader_url: Option<String>,
    pub url: Option<Url>,
    pub vbr: Option<f64>,
    pub vcodec: Option<String>,
    pub video_ext: Option<String>,
    pub view_count: Option<u32>,
    pub was_live: Option<bool>,
    pub webpage_url: Option<Url>,
    pub webpage_url_basename: Option<String>,
    pub webpage_url_domain: Option<String>,
    pub width: Option<u32>,
}

#[derive(Debug, Deserialize, Serialize, PartialEq)]
#[serde(deny_unknown_fields)]
#[allow(missing_copy_implementations)]
pub struct FilesToMove {}

#[derive(Debug, Deserialize, Serialize, PartialEq)]
#[serde(deny_unknown_fields)]
pub struct RequestedDownloads {
    pub __files_to_merge: Option<Vec<Todo>>,
    pub __finaldir: PathBuf,
    pub __infojson_filename: PathBuf,
    pub __postprocessors: Vec<Todo>,
    pub __real_download: bool,
    pub __write_download_archive: bool,
    pub _filename: PathBuf,
    pub _type: InfoType,
    pub _version: Version,
    pub abr: f64,
    pub acodec: String,
    pub aspect_ratio: Option<f64>,
    pub asr: Option<u32>,
    pub audio_channels: Option<u32>,
    pub audio_ext: Option<String>,
    pub chapters: Option<Vec<SponsorblockChapter>>,
    pub duration: Option<f64>,
    pub dynamic_range: Option<String>,
    pub ext: String,
    pub filename: PathBuf,
    pub filepath: PathBuf,
    pub filesize_approx: Option<u64>,
    pub format: String,
    pub format_id: String,
    pub format_note: String,
    pub fps: Option<f64>,
    pub has_drm: Option<bool>,
    pub height: Option<u32>,
    pub http_headers: Option<HttpHeader>,
    pub infojson_filename: PathBuf,
    pub language: Option<String>,
    pub manifest_url: Option<Url>,
    pub protocol: String,
    pub requested_formats: Option<Vec<Format>>,
    pub resolution: String,
    pub tbr: f64,
    pub url: Option<Url>,
    pub vbr: f64,
    pub vcodec: String,
    pub video_ext: Option<String>,
    pub width: Option<u32>,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
pub struct Subtitle {
    pub ext: SubtitleExt,
    pub filepath: PathBuf,
    pub filesize: Option<u64>,
    pub fragment_base_url: Option<Url>,
    pub fragments: Option<Vec<Fragment>>,
    pub manifest_url: Option<Url>,
    pub name: Option<String>,
    pub protocol: Option<Todo>,
    pub url: Url,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd, Ord, Eq, Clone, Copy)]
pub enum SubtitleExt {
    #[serde(alias = "vtt")]
    Vtt,

    #[serde(alias = "mp4")]
    Mp4,

    #[serde(alias = "json")]
    Json,
    #[serde(alias = "json3")]
    Json3,

    #[serde(alias = "ttml")]
    Ttml,

    #[serde(alias = "srv1")]
    Srv1,
    #[serde(alias = "srv2")]
    Srv2,
    #[serde(alias = "srv3")]
    Srv3,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
pub struct Caption {
    pub ext: SubtitleExt,
    pub filepath: Option<PathBuf>,
    pub filesize: Option<u64>,
    pub fragments: Option<Vec<SubtitleFragment>>,
    pub fragment_base_url: Option<Url>,
    pub manifest_url: Option<Url>,
    pub name: Option<String>,
    pub protocol: Option<String>,
    pub url: String,
    pub video_id: Option<String>,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
pub struct SubtitleFragment {
    path: PathBuf,
    duration: Option<f64>,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
pub struct Chapter {
    pub end_time: f64,
    pub start_time: f64,
    pub title: String,
}

#[derive(Debug, Deserialize, Serialize, PartialEq)]
#[serde(deny_unknown_fields)]
pub struct SponsorblockChapter {
    /// This is an utterly useless field, and should thus be ignored
    pub _categories: Option<Vec<Vec<Value>>>,

    pub categories: Option<Vec<SponsorblockChapterCategory>>,
    pub category: Option<SponsorblockChapterCategory>,
    pub category_names: Option<Vec<String>>,
    pub end_time: f64,
    pub name: Option<String>,
    pub r#type: Option<SponsorblockChapterType>,
    pub start_time: f64,
    pub title: String,
}

pub fn get_none<'de, D, T>(_: D) -> Result<Option<T>, D::Error>
where
    D: Deserializer<'de>,
{
    Ok(None)
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd, Ord, Eq, Clone, Copy)]
#[serde(deny_unknown_fields)]
pub enum SponsorblockChapterType {
    #[serde(alias = "skip")]
    Skip,

    #[serde(alias = "chapter")]
    Chapter,

    #[serde(alias = "poi")]
    Poi,
}
#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd, Ord, Eq, Clone, Copy)]
#[serde(deny_unknown_fields)]
pub enum SponsorblockChapterCategory {
    #[serde(alias = "filler")]
    Filler,

    #[serde(alias = "interaction")]
    Interaction,

    #[serde(alias = "music_offtopic")]
    MusicOfftopic,

    #[serde(alias = "poi_highlight")]
    PoiHighlight,

    #[serde(alias = "preview")]
    Preview,

    #[serde(alias = "sponsor")]
    Sponsor,

    #[serde(alias = "selfpromo")]
    SelfPromo,

    #[serde(alias = "chapter")]
    Chapter,

    #[serde(alias = "intro")]
    Intro,

    #[serde(alias = "outro")]
    Outro,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
#[allow(missing_copy_implementations)]
pub struct HeatMapEntry {
    pub start_time: f64,
    pub end_time: f64,
    pub value: f64,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd, Ord, Eq, Clone, Copy)]
#[serde(deny_unknown_fields)]
pub enum InfoType {
    #[serde(alias = "playlist")]
    Playlist,

    #[serde(alias = "url")]
    Url,

    #[serde(alias = "video")]
    Video,
}

#[derive(Debug, Deserialize, Serialize, Eq, PartialEq, PartialOrd, Ord)]
#[serde(deny_unknown_fields)]
pub struct Version {
    pub current_git_head: Option<String>,
    pub release_git_head: String,
    pub repository: String,
    pub version: String,
}

#[derive(Debug, Deserialize, Serialize, Clone, Eq, PartialEq, PartialOrd, Ord)]
#[serde(from = "String")]
#[serde(deny_unknown_fields)]
pub enum Parent {
    Root,
    Id(String),
}

impl Parent {
    #[must_use]
    pub fn id(&self) -> Option<&str> {
        if let Self::Id(id) = self {
            Some(id)
        } else {
            None
        }
    }
}

impl From<String> for Parent {
    fn from(value: String) -> Self {
        if value == "root" {
            Self::Root
        } else {
            Self::Id(value)
        }
    }
}

#[derive(Debug, Deserialize, Serialize, Clone, Eq, PartialEq, PartialOrd, Ord)]
#[serde(from = "String")]
#[serde(deny_unknown_fields)]
pub struct Id {
    pub id: String,
}
impl From<String> for Id {
    fn from(value: String) -> Self {
        Self {
            // Take the last element if the string is split with dots, otherwise take the full id
            id: value.split('.').last().unwrap_or(&value).to_owned(),
        }
    }
}

#[derive(Debug, Deserialize, Serialize, Clone, Eq, PartialEq, PartialOrd, Ord)]
#[serde(deny_unknown_fields)]
#[allow(clippy::struct_excessive_bools)]
pub struct Comment {
    pub id: Id,
    pub text: String,
    #[serde(default = "zero")]
    pub like_count: u32,
    pub is_pinned: bool,
    pub author_id: String,
    #[serde(default = "unknown")]
    pub author: String,
    pub author_is_verified: bool,
    pub author_thumbnail: Url,
    pub parent: Parent,
    #[serde(deserialize_with = "edited_from_time_text", alias = "_time_text")]
    pub edited: bool,
    // Can't also be deserialized, as it's already used in 'edited'
    // _time_text: String,
    pub timestamp: i64,
    pub author_url: Url,
    pub author_is_uploader: bool,
    pub is_favorited: bool,
}
fn unknown() -> String {
    "<Unknown>".to_string()
}
fn zero() -> u32 {
    0
}
fn edited_from_time_text<'de, D>(d: D) -> Result<bool, D::Error>
where
    D: Deserializer<'de>,
{
    let s = String::deserialize(d)?;
    if s.contains(" (edited)") {
        Ok(true)
    } else {
        Ok(false)
    }
}

#[derive(Debug, Deserialize, Serialize, PartialEq, Eq, PartialOrd, Ord)]
#[serde(deny_unknown_fields)]
pub struct ThumbNail {
    pub id: Option<String>,
    pub preference: Option<i32>,
    /// in the form of "[`height`]x[`width`]"
    pub resolution: Option<String>,
    pub url: Url,
    pub width: Option<u32>,
    pub height: Option<u32>,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
pub struct Format {
    pub __needs_testing: Option<bool>,
    pub __working: Option<bool>,
    pub abr: Option<f64>,
    pub acodec: Option<String>,
    pub aspect_ratio: Option<f64>,
    pub asr: Option<f64>,
    pub audio_channels: Option<u32>,
    pub audio_ext: Option<String>,
    pub columns: Option<u32>,
    pub container: Option<String>,
    pub downloader_options: Option<DownloaderOptions>,
    pub dynamic_range: Option<String>,
    pub ext: String,
    pub filepath: Option<PathBuf>,
    pub filesize: Option<u64>,
    pub filesize_approx: Option<u64>,
    pub format: Option<String>,
    pub format_id: String,
    pub format_index: Option<String>,
    pub format_note: Option<String>,
    pub fps: Option<f64>,
    pub fragment_base_url: Option<Todo>,
    pub fragments: Option<Vec<Fragment>>,
    pub has_drm: Option<bool>,
    pub height: Option<u32>,
    pub http_headers: Option<HttpHeader>,
    pub is_dash_periods: Option<bool>,
    pub language: Option<String>,
    pub language_preference: Option<i32>,
    pub manifest_stream_number: Option<u32>,
    pub manifest_url: Option<Url>,
    pub preference: Option<i32>,
    pub protocol: Option<String>,
    pub quality: Option<f64>,
    pub resolution: Option<String>,
    pub rows: Option<u32>,
    pub source_preference: Option<i32>,
    pub tbr: Option<f64>,
    pub url: Url,
    pub vbr: Option<f64>,
    pub vcodec: String,
    pub video_ext: Option<String>,
    pub width: Option<u32>,
}

#[derive(Debug, Deserialize, Serialize, Eq, PartialEq, PartialOrd, Ord)]
#[serde(deny_unknown_fields)]
#[allow(missing_copy_implementations)]
pub struct DownloaderOptions {
    http_chunk_size: u64,
}

#[derive(Debug, Deserialize, Serialize, Eq, PartialEq, PartialOrd, Ord)]
#[serde(deny_unknown_fields)]
pub struct HttpHeader {
    #[serde(alias = "User-Agent")]
    pub user_agent: Option<String>,

    #[serde(alias = "Accept")]
    pub accept: Option<String>,

    #[serde(alias = "X-Forwarded-For")]
    pub x_forwarded_for: Option<String>,

    #[serde(alias = "Accept-Language")]
    pub accept_language: Option<String>,

    #[serde(alias = "Sec-Fetch-Mode")]
    pub sec_fetch_mode: Option<String>,
}

#[derive(Debug, Deserialize, Serialize, PartialEq, PartialOrd)]
#[serde(deny_unknown_fields)]
pub struct Fragment {
    pub url: Option<Url>,
    pub duration: Option<f64>,
    pub path: Option<PathBuf>,
}

impl InfoJson {
    pub fn to_py_dict(self, py: Python<'_>) -> PyResult<Bound<'_, PyDict>> {
        let output: Bound<'_, PyDict> = json_loads_str(py, self)?;
        Ok(output)
    }
}