package service

import (
	"errors"
	"testing"
	"time"
)

// TestWebSocketTicketIssueBindsIdentityAndExpiry：签发的票据绑定用户、公司、签发时间，
// 并在有效期内可被一次性消费。
func TestWebSocketTicketIssueBindsIdentityAndExpiry(t *testing.T) {
	base := time.Now()
	svc := NewWebSocketTicketService(30 * time.Second)
	svc.now = func() time.Time { return base }

	ticket, err := svc.Issue(7, 2)
	if err != nil {
		t.Fatalf("签发失败: %v", err)
	}
	if ticket.UserID != 7 || ticket.OrganizationID != 2 {
		t.Fatalf("票据未绑定用户/公司: %+v", ticket)
	}
	if !ticket.IssuedAt.Equal(base) {
		t.Fatalf("签发时间错误: %v", ticket.IssuedAt)
	}
	if !ticket.ExpiresAt.Equal(base.Add(30 * time.Second)) {
		t.Fatalf("过期时间应为签发时间 + 30s: %v", ticket.ExpiresAt)
	}

	// 有效期最后一刻仍可消费。
	svc.now = func() time.Time { return base.Add(29 * time.Second) }
	consumed, err := svc.Consume(ticket.Ticket)
	if err != nil {
		t.Fatalf("有效期内消费失败: %v", err)
	}
	if consumed.UserID != 7 || consumed.OrganizationID != 2 {
		t.Fatalf("消费后身份错误: %+v", consumed)
	}
}

// TestWebSocketTicketIsOneTimeOnly：票据一次性，重放或再次消费都被拒绝。
func TestWebSocketTicketIsOneTimeOnly(t *testing.T) {
	svc := NewWebSocketTicketService()
	ticket, err := svc.Issue(7, 2)
	if err != nil {
		t.Fatal(err)
	}
	if _, err := svc.Consume(ticket.Ticket); err != nil {
		t.Fatalf("首次消费应成功: %v", err)
	}
	if _, err := svc.Consume(ticket.Ticket); !errors.Is(err, ErrWebSocketTicketInvalid) {
		t.Fatalf("重放应被拒绝，实际 err=%v", err)
	}
}

func TestWebSocketTicketRejectsUnknownAndEmpty(t *testing.T) {
	for _, tc := range []struct {
		name  string
		value string
	}{
		{"empty", ""},
		{"unknown", "0123456789abcdef"},
	} {
		t.Run(tc.name, func(t *testing.T) {
			svc := NewWebSocketTicketService()
			if _, err := svc.Consume(tc.value); !errors.Is(err, ErrWebSocketTicketInvalid) {
				t.Fatalf("应返回无效票据错误，实际 %v", err)
			}
		})
	}
}

// TestWebSocketTicketExpires：超过 30 秒有效期的票据不能再连接。
func TestWebSocketTicketExpires(t *testing.T) {
	base := time.Now()
	svc := NewWebSocketTicketService(30 * time.Second)
	svc.now = func() time.Time { return base }
	ticket, err := svc.Issue(7, 2)
	if err != nil {
		t.Fatal(err)
	}

	svc.now = func() time.Time { return base.Add(31 * time.Second) }
	if _, err := svc.Consume(ticket.Ticket); !errors.Is(err, ErrWebSocketTicketExpired) {
		t.Fatalf("过期票据应被拒绝，实际 %v", err)
	}
	// 过期票据已从集合中移除，再次消费按“未知票据”处理。
	if _, err := svc.Consume(ticket.Ticket); !errors.Is(err, ErrWebSocketTicketInvalid) {
		t.Fatalf("过期后再次消费应为无效票据，实际 %v", err)
	}
}

func TestWebSocketTicketIssueRequiresValidIdentity(t *testing.T) {
	svc := NewWebSocketTicketService()
	for _, tc := range []struct {
		name          string
		userID, orgID int64
	}{
		{"zero user", 0, 2},
		{"zero org", 7, 0},
		{"negative", -1, -2},
	} {
		t.Run(tc.name, func(t *testing.T) {
			if _, err := svc.Issue(tc.userID, tc.orgID); !errors.Is(err, ErrInvalidOrganizationID) {
				t.Fatalf("应返回 ErrInvalidOrganizationID，实际 %v", err)
			}
		})
	}
}

// TestWebSocketTicketValuesAreRandom：每张票据的随机标识互不相同。
func TestWebSocketTicketValuesAreRandom(t *testing.T) {
	svc := NewWebSocketTicketService()
	first, err := svc.Issue(7, 2)
	if err != nil {
		t.Fatal(err)
	}
	second, err := svc.Issue(7, 2)
	if err != nil {
		t.Fatal(err)
	}
	if first.Ticket == second.Ticket || len(first.Ticket) < 32 {
		t.Fatalf("票据应为足够长的随机串: %q / %q", first.Ticket, second.Ticket)
	}
}