package config

import "testing"

func TestLoadDefaults(t *testing.T) {
	// Ensure no ambient values leak into the test.
	for _, k := range []string{
		"EMAIL_AGENT_ENV", "EMAIL_AGENT_ADDR", "EMAIL_AGENT_PORT",
		"EMAIL_AGENT_DB_PATH", "EMAIL_AGENT_LOG_LEVEL", "EMAIL_AGENT_PUBLIC_BASE_URL",
		"GMAIL_USER", "GMAIL_APP_PASSWORD", "EMAIL_AGENT_IMAP_HOST", "EMAIL_AGENT_IMAP_PORT",
		"EMAIL_AGENT_IMAP_LOOKBACK_DAYS", "EMAIL_AGENT_IMAP_MAX_MESSAGES",
	} {
		t.Setenv(k, "")
	}

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if cfg.Port != DefaultPort {
		t.Errorf("Port = %d, want %d", cfg.Port, DefaultPort)
	}
	if cfg.Addr != DefaultAddr {
		t.Errorf("Addr = %q, want %q", cfg.Addr, DefaultAddr)
	}
	if cfg.Env != DefaultEnv {
		t.Errorf("Env = %q, want %q", cfg.Env, DefaultEnv)
	}
	if cfg.DBPath != DefaultDB {
		t.Errorf("DBPath = %q, want %q", cfg.DBPath, DefaultDB)
	}
	if cfg.IMAPHost != DefaultIMAPHost {
		t.Errorf("IMAPHost = %q, want %q", cfg.IMAPHost, DefaultIMAPHost)
	}
	if cfg.IMAPPort != DefaultIMAPPort {
		t.Errorf("IMAPPort = %d, want %d", cfg.IMAPPort, DefaultIMAPPort)
	}
	if cfg.IMAPLookbackDays != DefaultIMAPLookbackDays {
		t.Errorf("IMAPLookbackDays = %d, want %d", cfg.IMAPLookbackDays, DefaultIMAPLookbackDays)
	}
	if cfg.IMAPMaxMessages != DefaultIMAPMaxMessages {
		t.Errorf("IMAPMaxMessages = %d, want %d", cfg.IMAPMaxMessages, DefaultIMAPMaxMessages)
	}
	if cfg.GmailConfigured() {
		t.Error("GmailConfigured() = true with no credentials")
	}
}

func TestGmailConfigured(t *testing.T) {
	t.Setenv("GMAIL_USER", "samuelrolfe@gmail.com")
	t.Setenv("GMAIL_APP_PASSWORD", "app-password")

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if !cfg.GmailConfigured() {
		t.Error("GmailConfigured() = false with credentials set")
	}

	t.Setenv("GMAIL_APP_PASSWORD", "")
	cfg, err = Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if cfg.GmailConfigured() {
		t.Error("GmailConfigured() = true with no app password")
	}
}

func TestLoadOverrides(t *testing.T) {
	t.Setenv("EMAIL_AGENT_ENV", "production")
	t.Setenv("EMAIL_AGENT_PORT", "9000")
	t.Setenv("EMAIL_AGENT_DB_PATH", "/tmp/custom.db")
	t.Setenv("EMAIL_AGENT_LOG_LEVEL", "debug")
	t.Setenv("EMAIL_AGENT_PUBLIC_BASE_URL", "https://example.test/")
	t.Setenv("EMAIL_AGENT_ADDR", "")

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if cfg.Port != 9000 {
		t.Errorf("Port = %d, want 9000", cfg.Port)
	}
	if cfg.Addr != ":9000" {
		t.Errorf("Addr = %q, want %q", cfg.Addr, ":9000")
	}
	if !cfg.IsProduction() {
		t.Errorf("IsProduction() = false, want true")
	}
	if cfg.PublicBaseURL != "https://example.test" {
		t.Errorf("PublicBaseURL = %q, want trimmed URL", cfg.PublicBaseURL)
	}
}

func TestLoadInvalidPort(t *testing.T) {
	t.Setenv("EMAIL_AGENT_PORT", "not-a-number")
	t.Setenv("EMAIL_AGENT_ADDR", "")
	if _, err := Load(); err == nil {
		t.Fatal("Load() error = nil, want error for invalid port")
	}
}

func TestLoadInvalidEnv(t *testing.T) {
	t.Setenv("EMAIL_AGENT_ENV", "staging")
	t.Setenv("EMAIL_AGENT_ADDR", "")
	if _, err := Load(); err == nil {
		t.Fatal("Load() error = nil, want error for invalid env")
	}
}

func TestHubAndAppriseConfig(t *testing.T) {
	for _, k := range []string{"HUB_TOKEN", "HUB_BASE_URL", "APPRISE_URL", "APPRISE_KEY", "APPRISE_URLS", "EMAIL_AGENT_SUMMARY_TO", "HUB_NOTIFY_TIMEOUT"} {
		t.Setenv(k, "")
	}
	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if cfg.HubConfigured() {
		t.Error("HubConfigured() = true with no HUB_TOKEN")
	}
	if cfg.HubBaseURL != DefaultHubBaseURL {
		t.Errorf("HubBaseURL = %q, want %q", cfg.HubBaseURL, DefaultHubBaseURL)
	}
	if cfg.AppriseURL != DefaultAppriseURL {
		t.Errorf("AppriseURL = %q, want %q", cfg.AppriseURL, DefaultAppriseURL)
	}
	if cfg.SummaryTo != DefaultSummaryTo {
		t.Errorf("SummaryTo = %q, want %q", cfg.SummaryTo, DefaultSummaryTo)
	}
	if cfg.AppriseConfigured() {
		t.Error("AppriseConfigured() = true with no key or URLs")
	}

	t.Setenv("HUB_TOKEN", "hub-secret")
	t.Setenv("APPRISE_KEY", "email-summary")
	cfg, err = Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if !cfg.HubConfigured() {
		t.Error("HubConfigured() = false with HUB_TOKEN set")
	}
	if !cfg.AppriseConfigured() {
		t.Error("AppriseConfigured() = false with a key set")
	}

	// A stateless URL list also configures Apprise.
	t.Setenv("APPRISE_KEY", "")
	t.Setenv("APPRISE_URLS", "mailto://a:b@example.com, ntfy://topic")
	cfg, err = Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if !cfg.AppriseConfigured() {
		t.Error("AppriseConfigured() = false with APPRISE_URLS set")
	}
	if len(cfg.AppriseURLs) != 2 {
		t.Errorf("AppriseURLs = %v, want 2 entries", cfg.AppriseURLs)
	}
}