//! Convert WIT bindgen types to FlatBuffer wire-format payloads.
//!
//! This module bridges the gap between the Wasmtime component-model bindgen
//! types (from `bex_core::engine::bex::plugin::common::*`) and the FlatBuffer
//! wire types (from `bex_wire`). Each function takes WIT types from a plugin
//! call result and produces a `Vec<u8>` FlatBuffer payload suitable for
//! inclusion in a `BexEvent`.

use bex_core::common as wit;
use bex_wire::data::*;
use bex_wire::builders;

/// Convert WIT `HomeSection` vector → FlatBuffer `HomeResult` payload.
pub fn home_to_flatbuffer(sections: &[wit::HomeSection]) -> Vec<u8> {
    let data: Vec<HomeSectionData> = sections.iter().map(home_section_to_data).collect();
    builders::build_home_result(data)
}

/// Convert WIT `PagedResult` → FlatBuffer `SearchResult` payload.
pub fn search_to_flatbuffer(r: &wit::PagedResult) -> Vec<u8> {
    let items: Vec<MediaCardData> = r.items.iter().map(media_card_to_data).collect();
    builders::build_search_result(items, r.next_page.clone())
}

/// Convert WIT `MediaInfo` → FlatBuffer `InfoResult` payload.
pub fn info_to_flatbuffer(info: &wit::MediaInfo) -> Vec<u8> {
    let data = media_info_to_data(info);
    builders::build_info_result(data)
}

/// Convert WIT `Server` vector → FlatBuffer `ServersResult` payload.
pub fn servers_to_flatbuffer(servers: &[wit::Server]) -> Vec<u8> {
    let data: Vec<ServerData> = servers.iter().map(server_to_data).collect();
    builders::build_servers_result(data)
}

/// Convert WIT `StreamSource` → FlatBuffer `StreamResult` payload.
pub fn stream_to_flatbuffer(source: &wit::StreamSource) -> Vec<u8> {
    let data = stream_source_to_data(source);
    builders::build_stream_result(data)
}

// ── WIT → Data conversion helpers ──────────────────────────────────

fn home_section_to_data(s: &wit::HomeSection) -> HomeSectionData {
    HomeSectionData {
        id: s.id.clone(),
        title: s.title.clone(),
        subtitle: s.subtitle.clone(),
        items: s.items.iter().map(media_card_to_data).collect(),
        next_page: s.next_page.clone(),
        layout: Some(format!("{:?}", s.layout).to_lowercase()),
        show_rank: s.show_rank,
        categories: s.categories.iter().map(category_link_to_data).collect(),
        extra: s.extra.iter().map(attr_to_data).collect(),
    }
}

fn media_card_to_data(c: &wit::MediaCard) -> MediaCardData {
    MediaCardData {
        id: c.id.clone(),
        title: c.title.clone(),
        kind: c.kind.as_ref().map(media_kind_to_u8).unwrap_or(10),
        images: c.images.as_ref().map(image_set_to_data),
        original_title: c.original_title.clone(),
        tagline: c.tagline.clone(),
        year: c.year.clone(),
        score: c.score.unwrap_or(0),
        genres: c.genres.clone(),
        status: c.status.as_ref().map(status_to_u8).unwrap_or(0),
        content_rating: c.content_rating.clone(),
        url: c.url.clone(),
        ids: c.ids.iter().map(linked_id_to_data).collect(),
        extra: c.extra.iter().map(attr_to_data).collect(),
    }
}

fn media_info_to_data(m: &wit::MediaInfo) -> MediaInfoData {
    MediaInfoData {
        id: m.id.clone(),
        title: m.title.clone(),
        kind: media_kind_to_u8(&m.kind),
        images: m.images.as_ref().map(image_set_to_data),
        original_title: m.original_title.clone(),
        description: m.description.clone(),
        score: m.score.unwrap_or(0),
        scored_by: m.scored_by.unwrap_or(0),
        year: m.year.clone(),
        release_date: m.release_date.clone(),
        genres: m.genres.clone(),
        tags: m.tags.clone(),
        status: m.status.as_ref().map(status_to_u8).unwrap_or(0),
        content_rating: m.content_rating.clone(),
        seasons: m.seasons.iter().map(season_to_data).collect(),
        cast: m.cast.iter().map(person_to_data).collect(),
        crew: m.crew.iter().map(person_to_data).collect(),
        runtime_minutes: m.runtime_minutes.unwrap_or(0),
        trailer_url: m.trailer_url.clone(),
        ids: m.ids.iter().map(linked_id_to_data).collect(),
        studio: m.studio.clone(),
        country: m.country.clone(),
        language: m.language.clone(),
        url: m.url.clone(),
        extra: m.extra.iter().map(attr_to_data).collect(),
    }
}

fn season_to_data(s: &wit::Season) -> SeasonData {
    SeasonData {
        id: s.id.clone(),
        title: s.title.clone(),
        number: s.number.unwrap_or(0.0),
        year: s.year.unwrap_or(0),
        episodes: s.episodes.iter().map(episode_to_data).collect(),
    }
}

fn episode_to_data(e: &wit::Episode) -> EpisodeData {
    EpisodeData {
        id: e.id.clone(),
        title: e.title.clone(),
        number: e.number.unwrap_or(0.0),
        season: e.season.unwrap_or(0.0),
        images: e.images.as_ref().map(image_set_to_data),
        description: e.description.clone(),
        released: e.released.clone(),
        score: e.score.unwrap_or(0),
        url: e.url.clone(),
        tags: e.tags.clone(),
        extra: e.extra.iter().map(attr_to_data).collect(),
    }
}

fn person_to_data(p: &wit::Person) -> PersonData {
    PersonData {
        id: p.id.clone(),
        name: p.name.clone(),
        image: p.image.as_ref().map(image_set_to_data),
        role: p.role.clone(),
        url: p.url.clone(),
    }
}

fn server_to_data(s: &wit::Server) -> ServerData {
    ServerData {
        id: s.id.clone(),
        label: Some(s.label.clone()),
        url: Some(s.url.clone()),
        priority: s.priority,
        extra: s.extra.iter().map(attr_to_data).collect(),
    }
}

fn stream_source_to_data(s: &wit::StreamSource) -> StreamSourceData {
    StreamSourceData {
        id: s.id.clone(),
        label: Some(s.label.clone()),
        format: stream_format_to_u8(&s.format),
        manifest_url: s.manifest_url.clone(),
        videos: s.videos.iter().map(video_track_to_data).collect(),
        subtitles: s.subtitles.iter().map(subtitle_track_to_data).collect(),
        headers: s.headers.iter().map(attr_to_data).collect(),
        extra: s.extra.iter().map(attr_to_data).collect(),
    }
}

fn video_track_to_data(v: &wit::VideoTrack) -> VideoTrackData {
    let label = v.resolution.label.clone();
    VideoTrackData {
        resolution: Some(VideoResolutionData {
            width: v.resolution.width,
            height: v.resolution.height,
            hdr: v.resolution.hdr,
            label: if label.is_empty() { None } else { Some(label) },
        }),
        url: v.url.clone(),
        mime_type: v.mime_type.clone(),
        bitrate: v.bitrate.unwrap_or(0),
        codecs: v.codecs.clone(),
    }
}

fn subtitle_track_to_data(s: &wit::SubtitleTrack) -> SubtitleTrackData {
    SubtitleTrackData {
        label: Some(s.label.clone()),
        url: s.url.clone(),
        language: s.language.clone(),
        format: s.format.clone(),
    }
}

fn image_set_to_data(s: &wit::ImageSet) -> ImageSetData {
    ImageSetData {
        low: s.low.as_ref().map(image_to_data),
        medium: s.medium.as_ref().map(image_to_data),
        high: s.high.as_ref().map(image_to_data),
        backdrop: s.backdrop.as_ref().map(image_to_data),
        logo: s.logo.as_ref().map(image_to_data),
    }
}

fn image_to_data(i: &wit::Image) -> ImageData {
    ImageData {
        url: i.url.clone(),
        layout: format!("{:?}", i.layout).to_lowercase(),
        width: i.width.unwrap_or(0),
        height: i.height.unwrap_or(0),
        blurhash: i.blurhash.clone(),
    }
}

fn category_link_to_data(c: &wit::CategoryLink) -> CategoryLinkData {
    CategoryLinkData {
        id: c.id.clone(),
        title: c.title.clone(),
        subtitle: c.subtitle.clone(),
        image: c.image.as_ref().map(image_to_data),
    }
}

fn linked_id_to_data(id: &wit::LinkedId) -> LinkedIdData {
    LinkedIdData {
        source: id.source.clone(),
        id: id.id.clone(),
    }
}

fn attr_to_data(a: &wit::Attr) -> AttrData {
    AttrData {
        key: a.key.clone(),
        value: a.value.clone(),
    }
}

fn media_kind_to_u8(k: &wit::MediaKind) -> u8 {
    match k {
        wit::MediaKind::Movie => 0,
        wit::MediaKind::Series => 1,
        wit::MediaKind::Anime => 2,
        wit::MediaKind::Short => 3,
        wit::MediaKind::Special => 4,
        wit::MediaKind::Documentary => 5,
        wit::MediaKind::Music => 6,
        wit::MediaKind::Podcast => 7,
        wit::MediaKind::Book => 8,
        wit::MediaKind::Live => 9,
        wit::MediaKind::Unknown => 10,
    }
}

fn status_to_u8(s: &wit::Status) -> u8 {
    match s {
        wit::Status::Unknown => 0,
        wit::Status::Upcoming => 1,
        wit::Status::Ongoing => 2,
        wit::Status::Completed => 3,
        wit::Status::Cancelled => 4,
        wit::Status::Paused => 5,
    }
}

fn stream_format_to_u8(f: &wit::StreamFormat) -> u8 {
    match f {
        wit::StreamFormat::Hls => 0,
        wit::StreamFormat::Dash => 1,
        wit::StreamFormat::Progressive => 2,
        wit::StreamFormat::Unknown => 3,
    }
}