//! The whole command surface, in one file, so the shape of the CLI reads at a
//! glance. Nothing here does any work — every variant is dispatched in `main`.

use std::path::PathBuf;

use clap::{Args, Parser, Subcommand};

#[derive(Debug, Parser)]
#[command(
    name = "spectral",
    version,
    about = "A monolithic kernel work wrapper to make it easy.",
    subcommand_required = true,
    arg_required_else_help = true
)]
pub struct Cli {
    #[command(subcommand)]
    pub command: Command,
}

#[derive(Debug, Subcommand)]
pub enum Command {
    /// Find work, build it, boot it
    Kernel {
        #[command(subcommand)]
        command: KernelCommand,
    },
    /// Carry a change from working tree to mailing list
    Patch {
        #[command(subcommand)]
        command: PatchCommand,
    },
}

#[derive(Debug, Subcommand)]
pub enum KernelCommand {
    /// Fetch a random open issue to work on
    Quest(QuestArgs),
    /// Build the kernel and boot it under qemu
    Test(TestArgs),
}

#[derive(Debug, Args)]
pub struct QuestArgs {
    /// Print the picked issue as JSON
    #[arg(long)]
    pub json: bool,
    /// Only consider issues whose title contains this text
    #[arg(long, value_name = "TEXT")]
    pub filter: Option<String>,
}

#[derive(Debug, Args)]
pub struct TestArgs {
    /// Boot the existing build instead of rebuilding first
    #[arg(long)]
    pub no_build: bool,
    /// Rootfs image to boot with; defaults to the tree's own test image
    #[arg(long, value_name = "PATH")]
    pub rootfs: Option<PathBuf>,
    /// Extra argument passed through to qemu (repeatable)
    #[arg(long = "qemu-arg", value_name = "ARG", allow_hyphen_values = true)]
    pub qemu_args: Vec<String>,
}

#[derive(Debug, Subcommand)]
pub enum PatchCommand {
    /// Run checkpatch.pl over the work in progress
    Check(CheckArgs),
    /// Auto-fix what checkpatch.pl reports
    Format(FormatArgs),
    /// Commit the work in progress with a kernel-style message
    Commit(CommitArgs),
    /// Write the diff against the base branch out to <NAME>.patch
    Create(CreateArgs),
    /// Send a patch, with To/CC taken from get_maintainer.pl
    Submit(SubmitArgs),
    /// Re-roll a patch as v<N>, renaming the file to match
    Update(UpdateArgs),
}

#[derive(Debug, Args)]
pub struct CheckArgs {
    /// Check this patch file instead of the working tree
    #[arg(value_name = "PATCH")]
    pub patch: Option<PathBuf>,
    /// Pass --strict to checkpatch.pl
    #[arg(long)]
    pub strict: bool,
}

#[derive(Debug, Args)]
pub struct FormatArgs {
    /// Fix this patch file instead of the working tree
    #[arg(value_name = "PATCH")]
    pub patch: Option<PathBuf>,
}

#[derive(Debug, Args)]
pub struct CommitArgs {
    /// Commit message, without the Signed-off-by line
    #[arg(value_name = "MESSAGE")]
    pub message: String,
    /// Append your Signed-off-by, which the kernel requires
    #[arg(short = 's', long)]
    pub signoff: bool,
    /// Amend the previous commit instead of adding one
    #[arg(long)]
    pub amend: bool,
}

#[derive(Debug, Args)]
pub struct CreateArgs {
    /// Patch name; `.patch` is appended if you leave it off
    #[arg(value_name = "NAME")]
    pub name: String,
    /// Branch or revision to diff against
    #[arg(long, value_name = "REV", default_value = "master")]
    pub base: String,
    /// Directory to write the patch into; defaults to the patch dir
    #[arg(long, value_name = "DIR")]
    pub out: Option<PathBuf>,
}

#[derive(Debug, Args)]
pub struct SubmitArgs {
    /// Patch file to send
    #[arg(value_name = "PATCH")]
    pub patch: PathBuf,
    /// Print the recipients and command instead of sending
    #[arg(long)]
    pub dry_run: bool,
    /// Extra address to CC (repeatable)
    #[arg(long = "cc", value_name = "ADDR")]
    pub cc: Vec<String>,
    /// Message-Id of the patch this one re-rolls, so mail threads correctly
    #[arg(long, value_name = "MSGID")]
    pub in_reply_to: Option<String>,
}

#[derive(Debug, Args)]
pub struct UpdateArgs {
    /// Patch file to re-roll
    #[arg(value_name = "PATCH")]
    pub patch: PathBuf,
    /// Revision to re-roll as; defaults to one past the file's current vN
    #[arg(short = 'v', long, value_name = "N")]
    pub revision: Option<u32>,
}