package cabana

import (
	"strings"
	"testing"
	"time"
	"unicode/utf8"

	"git.golem15.com/golem15/summercms/modules/bouncer"
	"git.golem15.com/golem15/summercms/modules/pact"
	"git.golem15.com/golem15/summercms/modules/party"
)

func TestAPITokenMint(t *testing.T) {
	seen := map[string]bool{}
	for i := 0; i < 1000; i++ {
		plain, hash, hint, err := mintAPIToken()
		if err != nil {
			t.Fatal(err)
		}
		if !wellFormedAPIToken(plain) {
			t.Fatalf("plain %q", plain)
		}
		if len(hash) != 64 {
			t.Fatalf("hash len %d", len(hash))
		}
		for _, c := range hash {
			if (c < '0' || c > '9') && (c < 'a' || c > 'f') {
				t.Fatalf("hash non-hex %q", hash)
			}
		}
		if hint != plain[len(plain)-4:] {
			t.Fatalf("hint %q", hint)
		}
		if seen[plain] {
			t.Fatalf("duplicate plain at %d", i)
		}
		seen[plain] = true
		if hashAPIToken(plain) != hash {
			t.Fatal("hashAPIToken mismatch")
		}
	}
}

func TestParseTokenExpiry(t *testing.T) {
	now := time.Date(2026, 6, 15, 12, 0, 0, 0, time.UTC)
	cases := []struct {
		name    string
		expires string
		cli     bool
		wantKey string
		check   func(*testing.T, *time.Time)
	}{
		{"30d", "30d", false, "", func(t *testing.T, got *time.Time) {
			if got == nil || !got.Equal(now.Add(30*24*time.Hour)) {
				t.Fatalf("%v", got)
			}
		}},
		{"90d", "90d", false, "", func(t *testing.T, got *time.Time) {
			if got == nil || !got.Equal(now.Add(90*24*time.Hour)) {
				t.Fatalf("%v", got)
			}
		}},
		{"365d", "365d", false, "", func(t *testing.T, got *time.Time) {
			if got == nil || !got.Equal(now.Add(365*24*time.Hour)) {
				t.Fatalf("%v", got)
			}
		}},
		{"never", "never", false, "", func(t *testing.T, got *time.Time) {
			if got != nil {
				t.Fatalf("%v", got)
			}
		}},
		{"absent defaults 90d", "", false, "", func(t *testing.T, got *time.Time) {
			if got == nil || !got.Equal(now.Add(90*24*time.Hour)) {
				t.Fatalf("%v", got)
			}
		}},
		{"cli future date", "2026-07-01", true, "", func(t *testing.T, got *time.Time) {
			want := time.Date(2026, 7, 1, 0, 0, 0, 0, time.UTC)
			if got == nil || !got.Equal(want) {
				t.Fatalf("%v", got)
			}
		}},
		{"cli today refused", "2026-06-15", true, "api_tokens.expires_invalid", nil},
		{"cli past refused", "2026-01-01", true, "api_tokens.expires_invalid", nil},
		{"garbage api", "tomorrow", false, "api_tokens.expires_invalid", nil},
		{"date in api mode refused", "2026-07-01", false, "api_tokens.expires_invalid", nil},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got, key := parseTokenExpiry(tc.expires, now, tc.cli)
			if key != tc.wantKey {
				t.Fatalf("key = %q, want %q", key, tc.wantKey)
			}
			if tc.check != nil {
				tc.check(t, got)
			}
		})
	}
}

func TestValidateTokenRequest(t *testing.T) {
	reg, err := compileTokenCatalog([]party.Plugin{scopePlugin{id: "acme.demo", scopes: []pact.TokenScope{{
		Name: "demo", Label: "Demo", Description: "D",
		Permissions: []string{"acme.demo.*"},
		Methods:     []string{"GET", "HEAD", "POST", "PUT", "PATCH", "DELETE"},
	}}}})
	if err != nil {
		t.Fatal(err)
	}
	owner := &bouncer.Principal{
		ID: 1, Backend: true,
		PermissionGrants: map[string]bool{"acme.demo.access": true},
	}
	now := time.Date(2026, 6, 15, 12, 0, 0, 0, time.UTC)

	_, details := validateTokenRequest(reg, owner, "", "90d", []string{"demo"}, now, false)
	if details["name"] == nil {
		t.Fatal("blank name")
	}
	long := strings.Repeat("x", 101)
	if utf8.RuneCountInString(long) != 101 {
		t.Fatal("fixture")
	}
	_, details = validateTokenRequest(reg, owner, long, "90d", []string{"demo"}, now, false)
	if details["name"] == nil {
		t.Fatal("over-100 name")
	}
	_, details = validateTokenRequest(reg, owner, "ok", "nope", []string{"demo"}, now, false)
	if details["expires"] == nil {
		t.Fatal("invalid expiry")
	}
	_, details = validateTokenRequest(reg, owner, "ok", "90d", nil, now, false)
	if details["scopes"] == nil {
		t.Fatal("empty scopes")
	}
	_, details = validateTokenRequest(reg, owner, "ok", "90d", []string{"missing"}, now, false)
	if details["scopes"] == nil {
		t.Fatal("unknown scope")
	}
	noOverlap := &bouncer.Principal{ID: 2, Backend: true, PermissionGrants: map[string]bool{"acme.other.x": true}}
	_, details = validateTokenRequest(reg, noOverlap, "ok", "90d", []string{"demo"}, now, false)
	if details["scopes"] == nil {
		t.Fatal("non-overlapping scope")
	}
	cleaned, details := validateTokenRequest(reg, owner, "ok", "90d", []string{"demo", "*", "demo"}, now, false)
	if details != nil {
		t.Fatalf("star normalize details=%v", details)
	}
	if len(cleaned.Scopes) != 1 || cleaned.Scopes[0] != "*" {
		t.Fatalf("star normalize = %#v", cleaned.Scopes)
	}
	cleaned, details = validateTokenRequest(reg, owner, "ok", "90d", []string{"demo", "demo"}, now, false)
	if details != nil || len(cleaned.Scopes) != 1 || cleaned.Scopes[0] != "demo" {
		t.Fatalf("dup removal = %#v details=%v", cleaned.Scopes, details)
	}
}