use anyhow::Context as _;

#[derive(serde::Deserialize, Debug, Clone, PartialEq, Eq)]
pub struct IssueEventMeta {
    pub action: IssueAction,
    pub issue: IssueMeta,
}

#[derive(serde::Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum IssueAction {
    Opened,
    Reopened,
    Closed,
    Assigned,
    Unassigned,
    Edited,
    #[serde(rename = "label_updated")]
    LabelUpdated,
    Labeled,
    #[serde(rename = "label_cleared")]
    LabelCleared,
    Unlabeled,
}

#[derive(serde::Deserialize, Debug, Clone, PartialEq, Eq)]
pub struct IssueMeta {
    pub number: u64,
    pub repository: RepoMeta,
}

#[derive(serde::Deserialize, Debug, Clone, PartialEq, Eq)]
pub struct RepoMeta {
    pub name: String,
    pub owner: String,
}

pub fn get_issue_event_meta_from_env() -> anyhow::Result<IssueEventMeta> {
    let path = std::env::var_os("GITHUB_EVENT_PATH")
        .context("Could not get event description file path (GITHUB_EVENT_PATH)")?;
    let f = std::fs::File::open(path).context("Could not open GITHUB_EVENT_PATH file")?;
    let meta: IssueEventMeta = serde_json::de::from_reader(f).context("Failed to parse")?;
    Ok(meta)
}

pub fn fake() -> IssueEventMeta {
    IssueEventMeta {
        action: IssueAction::Edited,
        issue: IssueMeta {
            number: 1337,
            repository: RepoMeta {
                name: "techtree".to_owned(),
                owner: "fafo".to_owned(),
            },
        },
    }
}