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// Copyright 2025 Shota FUJI
//
// 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 clap = @import("clap");

const ExitCode = @import("../exit.zig").ExitCode;
const find = @import("./server/find.zig");
const list = @import("./server/list.zig");

const Commands = enum {
    list,
    ls,
    find,
};

const parser = .{
    .command = clap.parsers.enumeration(Commands),
};

const params = clap.parseParamsComptime(
    \\-h, --help Prints this message to stdout and exits.
    \\<command>
    \\Available commands:
    \\* list ... List available Roon Server on network (alias: ls)
    \\* find ... Find a Roon Server matches to given ID
    \\
);

pub fn run(allocator: std.mem.Allocator, iter: *std.process.ArgIterator) ExitCode {
    var diag = clap.Diagnostic{};
    var res = clap.parseEx(clap.Help, &params, parser, iter, .{
        .diagnostic = &diag,
        .allocator = allocator,
        .terminating_positional = 0,
    }) catch |err| {
        diag.report(std.io.getStdErr().writer(), err) catch {};
        return ExitCode.incorrect_usage;
    };
    defer res.deinit();

    if (res.args.help > 0) {
        clap.help(std.io.getStdOut().writer(), clap.Help, &params, .{}) catch {};
        return ExitCode.ok;
    }

    const command = res.positionals[0] orelse {
        clap.help(std.io.getStdErr().writer(), clap.Help, &params, .{}) catch {};
        return ExitCode.incorrect_usage;
    };

    return switch (command) {
        .ls, .list => list.run(allocator, iter),
        .find => find.run(allocator, iter),
    };
}