//! `issue <verb>` — issue-scoped sub-commands. Wraps the per-verb modules
//! under an `issue` parent so `hive-forge issue close 42`, `issue create …`,
//! etc. read as kind-namespaced commands. The generic verbs that also work on
//! PRs (view/comment/comments/close/reopen/labels/assign/timeline) kind-check the
//! number is an issue first (`assert_kind`); the issue-only verbs are
//! kind-correct by construction. The flat `issue-*` + bare generic verbs stay
//! as hidden back-compat aliases (see `main.rs`).

use anyhow::Result;
use clap::{Args as ClapArgs, Subcommand};

use crate::client::Client;
use crate::verbs::{self, Kind, assert_kind};

#[derive(ClapArgs)]
pub struct Args {
    #[command(subcommand)]
    cmd: Cmd,
}

#[derive(Subcommand)]
enum Cmd {
    /// Show issue metadata as JSON.
    Show(verbs::issue::Args),
    /// Create an issue.
    Create(verbs::issue_create::Args),
    /// Edit an issue's title / body / state / milestone.
    Edit(verbs::issue_edit::Args),
    /// Show title + body + comments.
    View(verbs::view::Args),
    /// Post a comment on the issue.
    Comment(verbs::comment::Args),
    /// List comments on the issue.
    Comments(verbs::comments::Args),
    /// Close the issue.
    Close(verbs::close::Args),
    /// Reopen a closed issue.
    Reopen(verbs::reopen::Args),
    /// List / add / remove labels.
    Labels(verbs::labels::Args),
    /// Assign or unassign a user.
    Assign(verbs::assign::Args),
    /// List timeline events.
    Timeline(verbs::timeline::Args),
}

pub fn run(client: &Client, args: Args) -> Result<()> {
    match args.cmd {
        // Issue-only verbs.
        Cmd::Show(a) => verbs::issue::run(client, a),
        Cmd::Create(a) => verbs::issue_create::run(client, a),
        Cmd::Edit(a) => verbs::issue_edit::run(client, a),
        // Generics shared with `pr` — verify the number is an issue first.
        Cmd::View(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::view::run(client, a)
        }
        Cmd::Comment(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::comment::run(client, a)
        }
        Cmd::Comments(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::comments::run(client, a)
        }
        Cmd::Close(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::close::run(client, a)
        }
        Cmd::Reopen(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::reopen::run(client, a)
        }
        Cmd::Labels(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::labels::run(client, a)
        }
        Cmd::Assign(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::assign::run(client, a)
        }
        Cmd::Timeline(a) => {
            assert_kind(client, a.number, Kind::Issue)?;
            verbs::timeline::run(client, a)
        }
    }
}