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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 core = @import("core");

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

const parsers = .{
    .string = clap.parsers.string,
};

const params = clap.parseParamsComptime(
    \\-h, --help Prints this message to stdout and exits.
    \\-z, --zone <string> Name of zone to display playback state.
    \\
);

pub fn run(allocator: std.mem.Allocator, iter: *std.process.ArgIterator, plac: *const App) ExitCode {
    var diag = clap.Diagnostic{};
    var res = clap.parseEx(clap.Help, &params, parsers, iter, .{
        .diagnostic = &diag,
        .allocator = allocator,
    }) 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 conn = plac.app.conn orelse {
        std.log.err("Connection lost.", .{});
        return ExitCode.not_ok;
    };

    const zones = core.services.Transport.getZones(allocator, conn) catch |err| {
        std.log.err("Unable to get zones: {s}", .{@errorName(err)});
        return ExitCode.not_ok;
    };
    defer zones.deinit();

    const name = res.args.zone orelse {
        std.log.err("--zone is required.", .{});
        return ExitCode.incorrect_usage;
    };

    for (zones.value.zones) |zone| {
        if (std.mem.eql(u8, name, zone.display_name)) {
            std.fmt.format(std.io.getStdOut().writer(), "{s}\n", .{@tagName(zone.state)}) catch {};
            return ExitCode.ok;
        }
    }

    std.log.err("No zone found named {s}", .{name});
    return ExitCode.not_ok;
}