package support

import (
	"context"
	"errors"
	"fmt"
	"os"
	"strings"
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgxpool"
)

// TestSubmitCSATOwnershipAndOnce covers owner-only rating, eligibility, and one-rating rule.
func TestSubmitCSATOwnershipAndOnce(t *testing.T) {
	dsn := strings.TrimSpace(os.Getenv("DATABASE_URL"))
	if dsn == "" {
		t.Skip("DATABASE_URL not set")
	}
	ctx := context.Background()
	pg, err := pgxpool.New(ctx, dsn)
	if err != nil {
		t.Fatalf("postgres: %v", err)
	}
	t.Cleanup(pg.Close)

	var hasTable bool
	if err := pg.QueryRow(ctx, `
		SELECT EXISTS (
			SELECT 1 FROM information_schema.tables
			WHERE table_schema = 'public' AND table_name = 'support_csat_ratings'
		)`).Scan(&hasTable); err != nil {
		t.Fatalf("schema probe: %v", err)
	}
	if !hasTable {
		t.Skip("support_csat_ratings missing — run goose up for 029_support_desk")
	}

	companyID := uuid.New()
	ownerID := uuid.New()
	otherID := uuid.New()
	prefix := companyID.String()[:8]

	_, err = pg.Exec(ctx, `INSERT INTO companies (id, name, language) VALUES ($1, $2, 'en')`,
		companyID, "CSAT Co "+prefix)
	if err != nil {
		t.Fatalf("seed company: %v", err)
	}
	for _, u := range []struct {
		id    uuid.UUID
		email string
		name  string
	}{
		{ownerID, fmt.Sprintf("csat-owner-%s@example.test", prefix), "Owner"},
		{otherID, fmt.Sprintf("csat-other-%s@example.test", prefix), "Other"},
	} {
		_, err = pg.Exec(ctx, `
			INSERT INTO users (id, email, name, password_hash, must_set_password, is_platform_admin, is_active)
			VALUES ($1, $2, $3, 'x', false, false, true)`, u.id, u.email, u.name)
		if err != nil {
			t.Fatalf("seed user: %v", err)
		}
		_, err = pg.Exec(ctx, `
			INSERT INTO memberships (company_id, user_id, role, status)
			VALUES ($1, $2, 'member', 'active')`, companyID, u.id)
		if err != nil {
			t.Fatalf("seed membership: %v", err)
		}
	}
	t.Cleanup(func() {
		cctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
		defer cancel()
		_, _ = pg.Exec(cctx, `DELETE FROM support_csat_ratings WHERE company_id = $1`, companyID)
		_, _ = pg.Exec(cctx, `DELETE FROM support_notifications WHERE ticket_id IN (SELECT id FROM support_tickets WHERE company_id = $1)`, companyID)
		_, _ = pg.Exec(cctx, `DELETE FROM support_messages WHERE company_id = $1`, companyID)
		_, _ = pg.Exec(cctx, `DELETE FROM support_tickets WHERE company_id = $1`, companyID)
		_, _ = pg.Exec(cctx, `DELETE FROM memberships WHERE company_id = $1`, companyID)
		_, _ = pg.Exec(cctx, `DELETE FROM users WHERE id IN ($1, $2)`, ownerID, otherID)
		_, _ = pg.Exec(cctx, `DELETE FROM companies WHERE id = $1`, companyID)
	})

	svc := NewService(pg)
	ticket, err := svc.Create(ctx, companyID, ownerID, CreateInput{
		Subject:  "CSAT probe",
		Category: "other",
		Priority: "normal",
		Body:     "Need help rating",
	})
	if err != nil {
		t.Fatalf("create: %v", err)
	}

	_, err = svc.SubmitCSAT(ctx, companyID, ownerID, ticket.ID, CSATInput{Score: 5, Comment: "secret PII should not log"})
	if !errors.Is(err, ErrCSATNotEligible) {
		t.Fatalf("open ticket rate err=%v want ErrCSATNotEligible", err)
	}

	_, err = pg.Exec(ctx, `
		UPDATE support_tickets SET status = 'resolved', resolved_at = now(), updated_at = now()
		WHERE id = $1`, ticket.ID)
	if err != nil {
		t.Fatalf("resolve: %v", err)
	}

	got, err := svc.GetForUser(ctx, companyID, ownerID, ticket.ID)
	if err != nil {
		t.Fatalf("get: %v", err)
	}
	if !got.CSATEligible || got.CSAT != nil {
		t.Fatalf("eligible=%v csat=%v", got.CSATEligible, got.CSAT)
	}

	_, err = svc.SubmitCSAT(ctx, companyID, otherID, ticket.ID, CSATInput{Score: 1})
	if !errors.Is(err, ErrNotFound) {
		t.Fatalf("other rate err=%v want ErrNotFound", err)
	}

	rating, err := svc.SubmitCSAT(ctx, companyID, ownerID, ticket.ID, CSATInput{Score: 4, Comment: "good"})
	if err != nil {
		t.Fatalf("owner rate: %v", err)
	}
	if rating.Score != 4 || rating.Comment != "good" {
		t.Fatalf("rating=%+v", rating)
	}

	_, err = svc.SubmitCSAT(ctx, companyID, ownerID, ticket.ID, CSATInput{Score: 5})
	if !errors.Is(err, ErrAlreadyRated) {
		t.Fatalf("second rate err=%v want ErrAlreadyRated", err)
	}

	got, err = svc.GetForUser(ctx, companyID, ownerID, ticket.ID)
	if err != nil {
		t.Fatalf("get after: %v", err)
	}
	if got.CSATEligible || got.CSAT == nil || got.CSAT.Score != 4 {
		t.Fatalf("after rate eligible=%v csat=%v", got.CSATEligible, got.CSAT)
	}

	agg, err := svc.AggregateCSAT(ctx, nil, nil)
	if err != nil {
		t.Fatalf("aggregate: %v", err)
	}
	if agg.Total < 1 || agg.Distribution["4"] < 1 {
		t.Fatalf("aggregate=%+v", agg)
	}
}