//! Rich embed on a message — new table `message_embed` + `message_embed_field`.
//!
//! Discord-style embeds: link previews, rich cards with title/description/
//! thumbnail/image/footer/fields. Generated by the server (link preview)
//! or sent by bots/webhooks.

use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};
use uuid::Uuid;

/// A single embed attached to a message.
/// One message can have multiple embeds (e.g. link preview + bot embed).
#[derive(Debug, Clone, Serialize, Deserialize, sqlx::FromRow)]
pub struct MessageEmbed {
    pub id: Uuid,
    pub message_id: Uuid,

    /// "link" | "article" | "image" | "video" | "rich"
    pub embed_type: String,

    pub title: Option<String>,
    pub description: Option<String>,
    pub url: Option<String>,

    /// Embed accent color as integer (Discord format: 0xRRGGBB).
    pub color: Option<i32>,

    // Media
    /// Main image URL.
    pub image_url: Option<String>,
    pub image_width: Option<i32>,
    pub image_height: Option<i32>,
    /// Small thumbnail URL.
    pub thumbnail_url: Option<String>,
    pub thumbnail_width: Option<i32>,
    pub thumbnail_height: Option<i32>,
    /// Video URL (for video embeds).
    pub video_url: Option<String>,
    pub video_width: Option<i32>,
    pub video_height: Option<i32>,

    // Footer
    pub author_name: Option<String>,
    pub author_url: Option<String>,
    pub author_icon_url: Option<String>,
    pub footer_text: Option<String>,
    pub footer_icon_url: Option<String>,

    /// Provider name (e.g. "YouTube", "GitHub").
    pub provider_name: Option<String>,
    pub provider_url: Option<String>,

    pub created_at: DateTime<Utc>,
}

/// A key-value field within an embed (Discord-style field rows).
/// Stored in a separate table for flexibility.
#[derive(Debug, Clone, Serialize, Deserialize, sqlx::FromRow)]
pub struct MessageEmbedField {
    pub id: Uuid,
    pub embed_id: Uuid,
    pub name: String,
    pub value: String,
    /// Whether this field should display inline (side by side with other inline fields).
    pub inline: bool,
    pub position: i32,
}

/// An embed with its fields resolved in a single structure.
///
/// Convenience type returned by read APIs, joining embed and fields.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EmbedDetail {
    #[serde(flatten)]
    pub embed: MessageEmbed,
    pub fields: Vec<MessageEmbedField>,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_embed_serialize() {
        let embed = MessageEmbed {
            id: Uuid::now_v7(),
            message_id: Uuid::now_v7(),
            embed_type: "link".into(),
            title: Some("Example".into()),
            description: Some("A link preview".into()),
            url: Some("https://example.com".into()),
            color: Some(0x00FF00),
            image_url: None,
            image_width: None,
            image_height: None,
            thumbnail_url: None,
            thumbnail_width: None,
            thumbnail_height: None,
            video_url: None,
            video_width: None,
            video_height: None,
            author_name: None,
            author_url: None,
            author_icon_url: None,
            footer_text: None,
            footer_icon_url: None,
            provider_name: Some("GitHub".into()),
            provider_url: None,
            created_at: Utc::now(),
        };

        let json = serde_json::to_value(&embed).unwrap();
        assert_eq!(json["embed_type"], "link");
        assert_eq!(json["title"], "Example");
    }

    #[test]
    fn test_embed_detail_serialize() {
        let embed = MessageEmbed {
            id: Uuid::now_v7(),
            message_id: Uuid::now_v7(),
            embed_type: "rich".into(),
            title: Some("Article".into()),
            description: None,
            url: None,
            color: None,
            image_url: None,
            image_width: None,
            image_height: None,
            thumbnail_url: None,
            thumbnail_width: None,
            thumbnail_height: None,
            video_url: None,
            video_width: None,
            video_height: None,
            author_name: None,
            author_url: None,
            author_icon_url: None,
            footer_text: None,
            footer_icon_url: None,
            provider_name: None,
            provider_url: None,
            created_at: Utc::now(),
        };
        let field = MessageEmbedField {
            id: Uuid::now_v7(),
            embed_id: embed.id,
            name: "Key".into(),
            value: "Value".into(),
            inline: true,
            position: 0,
        };

        let detail = EmbedDetail {
            embed,
            fields: vec![field],
        };

        let json = serde_json::to_value(&detail).unwrap();
        assert_eq!(json["embed_type"], "rich");
        assert!(json["fields"].is_array());
    }
}