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//! Configs are application configurations that can be used by services.
//! Swarm mode must be enabled for these endpoints to work.

use crate::{conn::Payload, models, Result};

impl_api_ty!(Config => name);

impl Config {
    impl_api_ep! { cfg: Config, resp
        Inspect -> &format!("/configs/{}", cfg.name), models::Config
        Delete -> &format!("/configs/{}", cfg.name), ()
    }

    // TODO: add Config::update
}

impl Configs {
    impl_api_ep! { __: Config, resp
        List -> "/configs", models::Config
    }

    api_doc! { Config => Create
    /// Create a new config.
    |
    pub async fn create(&self, opts: &ConfigCreateOpts) -> Result<Config> {
        use serde::Deserialize;
        #[derive(Deserialize)]
        struct ConfigCreateResponse {
            #[serde(rename = "Id")]
            pub id: String,
        }
        self.docker
            .post_json("/ronfigs/create", Payload::Json(opts.serialize()?))
            .await
            .map(|resp: ConfigCreateResponse| {
                Config::new(self.docker.clone(), resp.id)
            })
    }}
}

pub mod opts {
    use crate::models::{Driver, Labels};
    use crate::{Error, Result};
    use containers_api::opts::Filter;
    use containers_api::{impl_filter_func, impl_opts_builder};
    use serde::{Deserialize, Serialize};

    impl_opts_builder!(url => ConfigList);

    pub enum ConfigFilter {
        /// The ID of the config.
        Id(String),
        /// Label in the form of `label=key`
        LabelKey(String),
        /// Label in the form of `label=key=val`
        Label(String, String),
        /// The name of the config.
        Name(String),
        Names(String),
    }

    impl Filter for ConfigFilter {
        fn query_key_val(&self) -> (&'static str, String) {
            use ConfigFilter::*;
            match &self {
                Id(id) => ("id", id.to_owned()),
                LabelKey(label) => ("label", label.to_owned()),
                Label(key, val) => ("label", format!("{}={}", key, val)),
                Name(name) => ("name", name.to_owned()),
                Names(names) => ("names", names.to_owned()),
            }
        }
    }

    impl ConfigListOptsBuilder {
        impl_filter_func!(
            /// Filter listed configs by variants of the enum.
            ConfigFilter
        );
    }

    #[derive(Clone, Debug, Serialize, Deserialize)]
    #[serde(rename_all = "PascalCase")]
    /// Structure used to create a new config with [`Configs::create`](crate::Configs::create).
    pub struct ConfigCreateOpts {
        name: String,
        labels: Labels,
        data: String,
        templating: Driver,
    }

    impl ConfigCreateOpts {
        /// Create a new config with name and data. This function will take care of
        /// encoding the config's data as base64.
        pub fn new<N, D>(name: N, data: D) -> Self
        where
            N: Into<String>,
            D: AsRef<str>,
        {
            Self {
                name: name.into(),
                labels: Labels::new(),
                data: base64::encode(data.as_ref()),
                templating: Driver {
                    name: "".into(),
                    options: None,
                },
            }
        }

        /// Set the templating driver of this config.
        pub fn set_templating(mut self, driver: Driver) -> Self {
            self.templating = driver;
            self
        }

        /// Add a label to this config
        pub fn add_label<K, V>(mut self, key: K, val: V) -> Self
        where
            K: Into<String>,
            V: Into<String>,
        {
            self.labels.insert(key.into(), val.into());
            self
        }

        pub fn serialize(&self) -> Result<String> {
            serde_json::to_string(&self).map_err(Error::from)
        }
    }
}

pub use opts::*;