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

#[derive(Deserialize)]
pub struct ActivityInput {
    pub sku_id: Uuid,
    pub name: serde_json::Value,
    #[serde(default)]
    pub description: Option<serde_json::Value>,
    #[serde(default)]
    pub image: Option<String>,
    pub group_price_minor: i64,
    pub currency: String,
    pub required_members: i32,
    pub starts_at: DateTime<Utc>,
    pub ends_at: DateTime<Utc>,
    pub group_lifetime_hours: i32,
    #[serde(default = "default_enabled")]
    pub enabled: bool,
}

fn default_enabled() -> bool {
    true
}

/// Checkout intent: one activity SKU at quantity 1, either joining an open
/// group or asking to open a new one.
#[derive(Deserialize, Clone, Copy)]
pub struct GroupBuyIntent {
    pub activity_id: Uuid,
    pub sku_id: Uuid,
    #[serde(default)]
    pub group_id: Option<Uuid>,
}

#[derive(Debug, Serialize, sqlx::FromRow)]
pub struct OpenGroupView {
    pub id: Uuid,
    pub paid_member_count: i32,
    pub required_members: i32,
    pub expires_at: DateTime<Utc>,
}

/// Activity plus the SKU/catalog details both surfaces need, with its open
/// groups for discovery.
#[derive(Debug, Serialize, sqlx::FromRow)]
pub struct ActivityView {
    pub id: Uuid,
    pub shop_id: Uuid,
    pub sku_id: Uuid,
    pub name: serde_json::Value,
    pub description: Option<serde_json::Value>,
    pub image: Option<String>,
    pub group_price_minor: i64,
    pub currency: String,
    pub required_members: i32,
    pub starts_at: DateTime<Utc>,
    pub ends_at: DateTime<Utc>,
    pub group_lifetime_hours: i32,
    pub enabled: bool,
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
    pub sku_code: String,
    pub product_id: Uuid,
    pub product_slug: String,
    pub product_name: serde_json::Value,
    pub original_price_minor: i64,
    pub original_currency: String,
    #[sqlx(skip)]
    pub open_groups: Vec<OpenGroupView>,
}

/// Outcome of validating a checkout intent.
pub struct ResolvedIntent {
    pub activity_id: Uuid,
    pub group_id: Uuid,
    pub shop_id: Uuid,
    pub unit_price_minor: i64,
    /// True when checkout opened the group rather than joining one.
    pub opened: bool,
}