use domain::models::Channel;
use domain::{DomainError, DomainResult};

use super::commands::RestoreSnapshotCommand;
use super::deps::ConfigSnapshotDeps;

pub async fn execute(
    deps: &ConfigSnapshotDeps,
    cmd: RestoreSnapshotCommand,
) -> DomainResult<Channel> {
    let snapshot = deps
        .channel_query
        .get_config_snapshot(cmd.channel_id, cmd.snapshot_id)
        .await?
        .ok_or(DomainError::ValidationError(format!(
            "Snapshot {} not found",
            cmd.snapshot_id
        )))?;

    let mut channel = deps
        .channel_query
        .find_by_id(cmd.channel_id)
        .await?
        .ok_or(DomainError::ChannelNotFound(cmd.channel_id))?;

    deps.channel_command
        .save_config_snapshot(cmd.channel_id, channel.schedule_config(), None)
        .await?;

    channel.set_schedule_config(snapshot.config().clone());
    deps.channel_command.save(&channel).await?;

    Ok(channel)
}