package main

import (
	"os"
	"path/filepath"
	"reflect"
	"testing"
	"time"
)

func TestReadConfig(t *testing.T) {
	configContent := `
# Public facing base URL of the service (e.g. https://ntfy-alertmanager.xenrox.net)
# This setting is required for the "Silence" feature.
base-url https://ntfy-alertmanager.xenrox.net
# http listen address
http-address :8080
# Log level (either debug, info, warning, error)
log-level info
# When multiple alerts are grouped together by Alertmanager, they can either be sent
# each on their own (single mode) or be kept together (multi mode) (either single or multi; default is single)
alert-mode multi
# Optionally protect with HTTP basic authentication
user webhookUser
password webhookPass

labels {
    order "severity,instance"

    severity "critical" {
        priority 5
        tags "rotating_light"
    }

    severity "info" {
        priority 1
    }

    instance "example.com" {
        tags "computer,example"
    }
}

ntfy {
    # URL of the ntfy topic - required
    topic https://ntfy.sh/alertmanager-alerts
    # ntfy access control (https://ntfy.sh/docs/config/#access-control)
    user user
    password pass
}

alertmanager {
    # If set, the ntfy message will contain a "Silence" button, which can be used
    # to create a silence via the Alertmanager API. Because of limitations in ntfy,
    # the request will be proxied through ntfy-alertmanager. Therefore ntfy-alertmanager
    # needs to be exposed to external network requests and base-url has to be set.
    silence-duration 24h
    # Basic authentication (https://prometheus.io/docs/alerting/latest/https/)
    user user
    password pass
}

# When the alert-mode is set to single, ntfy-alertmanager will cache each single alert
# to avoid sending recurrences.
cache {
    # How long messages stay in the cache for
    duration 48h
    # Interval in which the cache is cleaned up
    # cleanup-interval 1h
}
`

	expectedCfg := &config{
		BaseURL:     "https://ntfy-alertmanager.xenrox.net",
		HTTPAddress: ":8080",
		LogLevel:    "info",
		alertMode:   multi,
		User:        "webhookUser",
		Password:    "webhookPass",
		ntfy:        ntfyConfig{Topic: "https://ntfy.sh/alertmanager-alerts", User: "user", Password: "pass"},
		labels: labels{Order: []string{"severity", "instance"},
			Label: map[string]labelConfig{
				"severity:critical":    {Priority: "5", Tags: []string{"rotating_light"}},
				"severity:info":        {Priority: "1"},
				"instance:example.com": {Tags: []string{"computer", "example"}},
			},
		},
		cache: cacheConfig{CleanupInterval: time.Hour, Duration: 48 * time.Hour},
		am: alertmanagerConfig{
			SilenceDuration: time.Hour * 24,
			User:            "user",
			Password:        "pass",
		},
	}

	configPath := filepath.Join(t.TempDir(), "config")
	err := os.WriteFile(configPath, []byte(configContent), 0600)
	if err != nil {
		t.Errorf("failed to write config file: %v", err)
	}

	cfg, err := readConfig(configPath)
	if err != nil {
		t.Errorf("failed to read config file: %v", err)
	}

	if !reflect.DeepEqual(cfg, expectedCfg) {
		t.Errorf("expected: %v, got %v", expectedCfg, cfg)
	}
}