module main

import os
import flag

const version = '0.5.0'
const author  = 'Bruno Charest'

fn main() {
	mut fp := flag.new_flag_parser(os.args)
	fp.application('ntfy-bridge')
	fp.version(version)
	fp.description('Homelab notification hub — aggregates Gitea, Docker, Uptime Kuma → Ntfy')
	fp.skip_executable()

	config_path := fp.string('config', `c`, 'ntfy-bridge.yaml', 'Path to config file (YAML)')
	validate_only := fp.bool('validate', `v`, false, 'Validate config and exit')
	quiet := fp.bool('quiet', `q`, false, 'Quiet mode — suppress startup banner (for scripts/systemd)')
	version_only := fp.bool('version', `V`, false, 'Print version and exit')
	install_svc := fp.bool('install-service', 0, false, 'Install as a system service (auto-detects OS)')
	uninstall_svc := fp.bool('uninstall-service', 0, false, 'Uninstall the system service')
	svc_status := fp.bool('service-status', 0, false, 'Check if the service is installed and running')

	// Show help if no args or --help/-h requested
	if os.args.len <= 1 || '--help' in os.args || '-h' in os.args {
		print_help()
		return
	}

	fp.finalize() or {
		eprintln(err)
		exit(1)
		return
	}

	if version_only {
		println('ntfy-bridge ${version}')
		return
	}

	if install_svc {
		service_install(config_path, quiet) or {
			eprintln('Error: ${err}')
			exit(1)
			return
		}
		println('')
		println('Service installed. Edit ${config_path} to configure sources,')
		println('then restart the service to apply changes.')
		return
	}

	if uninstall_svc {
		service_uninstall() or {
			eprintln('Error: ${err}')
			exit(1)
			return
		}
		return
	}

	if svc_status {
		service_status() or {
			eprintln('Error: ${err}')
			exit(1)
			return
		}
		return
	}

	cfg := load_config(config_path) or {
		eprintln('Failed to load config: ${err}')
		exit(1)
		return
	}

	if validate_only {
		println('Config is valid')
		return
	}

	if !quiet {
		print_header()
		println('')
		print_startup_info(cfg)
	}

	mut app := new_app(cfg, config_path, quiet)
	app.run() or {
		eprintln('Server error: ${err}')
		exit(1)
	}
}

// ── ASCII Art Header ─────────────────────────────────────────────────────

const box_w = 60 // inner width between ║ borders

fn build_header() string {
	// Tagline — centered within the box
	tag_text := 'Homelab Notification Hub  ·  v${version}'
	tag_left := (box_w - tag_text.len) / 2
	tag_right := box_w - tag_left - tag_text.len
	tag_line := ' '.repeat(tag_left) + tag_text + ' '.repeat(tag_right)

	// Version line — left-aligned with 5-space indent
	vinfo := '     Version ${version} │ ${author}'
	vinfo_pad := box_w - vinfo.len

	return '╔══════════════════════════════════════════════════════════════╗\n' +
		'║            __  ____            __         _     __           ║\n' +
		'║     ____  / /_/ __/_  __      / /_  _____(_)___/ /___ ____   ║\n' +
		'║    / __ \\/ __/ /_/ / / /_____/ __ \\/ ___/ / __  / __ `/ _ \\  ║\n' +
		'║   / / / / /_/ __/ /_/ /_____/ /_/ / /  / / /_/ / /_/ /  __/  ║\n' +
		'║  /_/ /_/\\__/_/  \\__, /     /_.___/_/  /_/\\__,_/\\__, /\\___/   ║\n' +
		'║                /____/                         /____/         ║\n' +
		'║' + tag_line + '║\n' +
		'╠══════════════════════════════════════════════════════════════╣\n' +
		'║' + vinfo + ' '.repeat(vinfo_pad) + '║\n' +
		'╚══════════════════════════════════════════════════════════════╝'
}

fn print_header() {
	println(build_header())
}

fn print_help() {
	println('')
	println(build_header())
	println('')
	println('  A simple daemon to aggregate notifications from multiple sources')
	println('  (Gitea, Uptime Kuma, Docker, HTTP health checks, Cron scripts)')
	println('  and forward them as formatted Ntfy push notifications.')
	println('')
	println('Usage:')
	println('  ntfy-bridge [flags]')
	println('  ntfy-bridge --config ntfy-bridge.yaml')
	println('')
	println('Flags:')
	println('  -c, --config <path>   Path to config file (default: ntfy-bridge.yaml)')
	println('  -v, --validate         Validate config and exit')
	println('  -q, --quiet            Quiet mode — suppress startup banner')
	println('  -V, --version          Print version and exit')
	println('  -h, --help             Show this help message')
	println('')
	println('Service management:')
	println('  --install-service      Install as a system service (auto-detects OS)')
	println('  --uninstall-service    Uninstall the system service')
	println('  --service-status       Check if the service is installed and running')
	println('')
	println('Config:')
	println('  Copy ntfy-bridge.example.yaml → ntfy-bridge.yaml and edit it.')
	println('  Use NTFY_TOKEN and NTFY_HMAC_SECRET env vars for secrets.')
	println('')
	println('Docs:  https://git.dracodev.net/bruno/ntfy-bridge')
	println(line_double_r)
	println('  Version: ${version}  |  Author: ${author}')
	println(line_double_r)
	println('')
}

fn print_startup_info(cfg Config) {
	println(line_double_r)
	println('  Ntfy server:   ${cfg.server.url}')
	println('  Listening on:  http://${cfg.server.listen}')
	println('  Dashboard:     http://${normalize_listen(cfg.server.listen)}/')
	println('  Health check:  http://${normalize_listen(cfg.server.listen)}/health')
	println('')
	println('  Sources configured:')

	gitea_count := cfg.sources.gitea.len
	if gitea_count > 0 {
		println('    Gitea:       ${gitea_count} webhook${if gitea_count > 1 { 's' } else { '' }}')
	}
	uk_count := cfg.sources.uptime_kuma.len
	if uk_count > 0 {
		println('    Uptime Kuma: ${uk_count} webhook${if uk_count > 1 { 's' } else { '' }}')
	}
	docker_count := cfg.sources.docker.len
	if docker_count > 0 {
		println('    Docker:      ${docker_count} watcher${if docker_count > 1 { 's' } else { '' }}')
	}
	poll_count := cfg.sources.http_poll.len
	if poll_count > 0 {
		mut total_checks := 0
		for p in cfg.sources.http_poll {
			total_checks += p.checks.len
		}
		println('    HTTP Poll:   ${poll_count} poller${if poll_count > 1 { 's' } else { '' }} (${total_checks} check${if total_checks > 1 { 's' } else { '' }})')
	}
	cron_count := cfg.sources.cron.len
	if cron_count > 0 {
		println('    Cron:        ${cron_count} webhook${if cron_count > 1 { 's' } else { '' }}')
	}
	generic_count := cfg.sources.generic.len
	if generic_count > 0 {
		println('    Generic:     ${generic_count} webhook${if generic_count > 1 { 's' } else { '' }}')
	}

	println('')
	println('  Webhook URLs:')
	for src in cfg.sources.gitea {
		println('    http://${normalize_listen(cfg.server.listen)}${src.webhook_path}  →  ${src.topic}  (Gitea: ${src.name})')
	}
	for src in cfg.sources.uptime_kuma {
		println('    http://${normalize_listen(cfg.server.listen)}${src.webhook_path}  →  ${src.topic}  (Uptime Kuma: ${src.name})')
	}
	for src in cfg.sources.cron {
		println('    http://${normalize_listen(cfg.server.listen)}${src.webhook_path}  →  ${src.topic}  (Cron: ${src.name})')
	}
	for src in cfg.sources.generic {
		println('    http://${normalize_listen(cfg.server.listen)}${src.webhook_path}  →  ${src.topic}  (Generic: ${src.name})')
	}

	println('')
	if cfg.dedup.enabled {
		println('  Dedup:         enabled (TTL: ${cfg.dedup.ttl_seconds}s, rate: ${cfg.dedup.rate_limit.max_per_minute}/min)')
	} else {
		println('  Dedup:         disabled')
	}

	println(line_double_r)
	println('')
}

// normalize_listen converts "0.0.0.0:9090" to "localhost:9090" for display URLs,
// and leaves specific IPs intact (e.g. "192.168.30.101:9090" stays as-is).
fn normalize_listen(listen string) string {
	if listen.starts_with('0.0.0.0') {
		return 'localhost' + listen[7..]
	}
	if listen.starts_with('127.0.0.1') {
		return listen // already localhost
	}
	return listen
}

// ── Display Constants ─────────────────────────────────────────────────────

const line_double_r = '══════════════════════════════════════════════════════════════'