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// Copyright 2025 Shota FUJI <pockawoooh@gmail.com>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

const std = @import("std");

const exit = @import("./exit.zig");

const incus = @import("./incus.zig");

pub fn main() !u8 {
    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
    defer arena.deinit();

    const allocator = arena.allocator();

    return run(allocator).to_u8();
}

const help =
    \\,workerbee - Helper program for workerbee development environment management
    \\
    \\[USAGE]
    \\,workerbee <COMMAND>
    \\
    \\[COMMANDS]
    \\incus     Container management helpers.
    \\
    \\[OPTIONS]
    \\--help      Print this message to stdout and exits.
    \\
;

fn run(allocator: std.mem.Allocator) exit.Code {
    var iter = std.process.ArgIterator.initWithAllocator(allocator) catch {
        return .out_of_memory;
    };
    defer iter.deinit();

    // Skip program name.
    _ = iter.next();

    while (iter.next()) |arg| {
        if (std.mem.eql(u8, arg, "--help")) {
            var buf: [1024]u8 = undefined;
            var stdout = std.fs.File.stdout().writer(&buf);
            const writer = &stdout.interface;

            writer.writeAll(help) catch return .stdout_write_error;
            writer.flush() catch return .stdout_write_error;
            return .ok;
        }

        if (std.mem.eql(u8, arg, "incus")) {
            return incus.run(allocator, &iter) catch |err| {
                std.log.err("Unhandled error at \"incus\" command: {t}", .{err});
                return .unhandled_error;
            };
        }

        std.log.err("Unknown command \"{s}\"", .{arg});
        return .incorrect_usage;
    }

    {
        var buf: [1024]u8 = undefined;
        var stderr = std.fs.File.stderr().writer(&buf);
        const writer = &stderr.interface;

        writer.writeAll(help) catch {};
        writer.flush() catch {};
    }
    return .incorrect_usage;
}