// SPDX-FileCopyrightText: 2023 Aravinth Manivannan <realaravinth@batsense.net>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

use std::path::PathBuf;
use std::process::Command;
use std::sync::Arc;

use serde::{Deserialize, Serialize};
use serde_json::Value as JValue;

use crate::docker::Docker;

#[derive(Debug, Eq, PartialEq, Clone, Serialize, Deserialize)]
pub struct Container {
    pub service: String,
    pub name: String,
    pub image: String,
}

pub struct DockerCompose {
    base_dir: PathBuf,
    docker: Arc<Docker>,
}

impl DockerCompose {
    pub fn new(base_dir: PathBuf, docker: Arc<Docker>) -> Self {
        Self { base_dir, docker }
    }
    pub fn version() -> String {
        let version = Command::new("docker-compose")
            .arg("--version")
            .output()
            .expect("unable to obtain DockerCompose version");
        let x = String::from_utf8(version.stdout).unwrap();
        let x: Vec<&str> = x.split("Docker Compose version ").collect();
        x.get(1).unwrap().trim().to_string()
    }

    pub fn services(&self) -> Vec<Container> {
        let ps = Command::new("docker-compose")
            .current_dir(&self.base_dir)
            .args(["ps", "--format", "json"])
            .output()
            .expect("unable to obtain DockerCompose version");
        let ps = String::from_utf8(ps.stdout).unwrap();
        let x: serde_json::Value = serde_json::from_str(&ps).unwrap();

        if let JValue::Array(val) = x {
            let mut containers = Vec::with_capacity(val.len());
            for item in val.iter() {
                if let JValue::Object(val) = item {
                    containers.push(Container {
                        name: val["Name"].as_str().unwrap().to_string(),
                        service: val["Service"].as_str().unwrap().to_string(),
                        image: val["Image"].as_str().unwrap().to_string(),
                    })
                }
            }
            return containers;
        }

        Vec::default()
    }

    pub fn up(&self) {
        let mut child = Command::new("docker-compose")
            .current_dir(&self.base_dir)
            .args(["up", "--detach", "--remove-orphans"])
            .spawn()
            .expect("unable to run DockerCompose");
        child.wait().unwrap();
    }

    pub fn logs(&self, service: &str) -> String {
        self.docker.get_logs(service)
    }

    pub fn down(&self, remove_orphans: bool, volumes: bool) {
        let mut opts = vec!["down"];
        if remove_orphans {
            opts.push("--remove-orphans");
        }

        if volumes {
            opts.push("--volumes");
        }
        let mut child = Command::new("docker-compose")
            .current_dir(&self.base_dir)
            .args(opts)
            .spawn()
            .expect("unable to remove");
        child.wait().unwrap();
    }
}

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

    use crate::docker::Docker;

    #[test]
    fn test_docker_compose() {
        DockerCompose::version();
        let cmp = DockerCompose::new("./tests/".into(), Arc::new(Docker::new()));
        assert!(cmp.services().is_empty());
        cmp.up();
        let services = cmp.services();
        std::thread::sleep(std::time::Duration::new(10, 0));
        assert_eq!(services.len(), 2);
        for service in services.iter() {
            let logs = cmp.logs(&service.name);
            assert!(logs.contains(&format!("NAME={}", service.name)));
        }
        cmp.down(true, true);
        assert!(cmp.services().is_empty());
    }
}