use serde::{Deserialize, Serialize};

mod room_member_count_is;

pub use room_member_count_is::{ComparisonOperator, RoomMemberCountIs};

/// A condition that must apply for an associated push rule's action to be taken.
#[derive(Clone, Debug, Deserialize, Serialize)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
#[serde(tag = "kind", rename_all = "snake_case")]
pub enum PushCondition {
    /// This is a glob pattern match on a field of the event.
    EventMatch {
        /// The dot-separated field of the event to match.
        key: String,

        /// The glob-style pattern to match against.
        ///
        /// Patterns with no special glob characters should be treated as having asterisks prepended
        /// and appended when testing the condition.
        pattern: String,
    },

    /// This matches unencrypted messages where `content.body` contains the owner's display name in
    /// that room.
    ContainsDisplayName,

    /// This matches the current number of members in the room.
    RoomMemberCount {
        /// The condition on the current number of members in the room.
        is: RoomMemberCountIs,
    },

    /// This takes into account the current power levels in the room, ensuring the sender of the
    /// event has high enough power to trigger the notification.
    SenderNotificationPermission {
        /// The field in the power level event the user needs a minimum power level for.
        ///
        /// Fields must be specified under the `notifications` property in the power level event's
        /// `content`.
        key: String,
    },
}

#[cfg(test)]
mod tests {
    use js_int::uint;
    use matches::assert_matches;
    use serde_json::{from_value as from_json_value, json, to_value as to_json_value};

    use super::{PushCondition, RoomMemberCountIs};

    #[test]
    fn serialize_event_match_condition() {
        let json_data = json!({
            "key": "content.msgtype",
            "kind": "event_match",
            "pattern": "m.notice"
        });
        assert_eq!(
            to_json_value(&PushCondition::EventMatch {
                key: "content.msgtype".into(),
                pattern: "m.notice".into(),
            })
            .unwrap(),
            json_data
        );
    }

    #[test]
    fn serialize_contains_display_name_condition() {
        assert_eq!(
            to_json_value(&PushCondition::ContainsDisplayName).unwrap(),
            json!({ "kind": "contains_display_name" })
        );
    }

    #[test]
    fn serialize_room_member_count_condition() {
        let json_data = json!({
            "is": "2",
            "kind": "room_member_count"
        });
        assert_eq!(
            to_json_value(&PushCondition::RoomMemberCount {
                is: RoomMemberCountIs::from(uint!(2))
            })
            .unwrap(),
            json_data
        );
    }

    #[test]
    fn serialize_sender_notification_permission_condition() {
        let json_data = json!({
            "key": "room",
            "kind": "sender_notification_permission"
        });
        assert_eq!(
            json_data,
            to_json_value(&PushCondition::SenderNotificationPermission { key: "room".into() })
                .unwrap()
        );
    }

    #[test]
    fn deserialize_event_match_condition() {
        let json_data = json!({
            "key": "content.msgtype",
            "kind": "event_match",
            "pattern": "m.notice"
        });
        assert_matches!(
            from_json_value::<PushCondition>(json_data).unwrap(),
            PushCondition::EventMatch { key, pattern }
            if key == "content.msgtype" && pattern == "m.notice"
        );
    }

    #[test]
    fn deserialize_contains_display_name_condition() {
        assert_matches!(
            from_json_value::<PushCondition>(json!({ "kind": "contains_display_name" })).unwrap(),
            PushCondition::ContainsDisplayName
        );
    }

    #[test]
    fn deserialize_room_member_count_condition() {
        let json_data = json!({
            "is": "2",
            "kind": "room_member_count"
        });
        assert_matches!(
            from_json_value::<PushCondition>(json_data).unwrap(),
            PushCondition::RoomMemberCount { is }
            if is == RoomMemberCountIs::from(uint!(2))
        );
    }

    #[test]
    fn deserialize_sender_notification_permission_condition() {
        let json_data = json!({
            "key": "room",
            "kind": "sender_notification_permission"
        });
        assert_matches!(
            from_json_value::<PushCondition>(json_data).unwrap(),
            PushCondition::SenderNotificationPermission {
                key
            } if key == "room"
        );
    }
}