package processing

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

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

func TestStartJobAutoSplitsAndCopyInserts(t *testing.T) {
	dsn := os.Getenv("DATABASE_URL")
	if dsn == "" {
		t.Skip("DATABASE_URL not set")
	}

	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	pg, err := pgxpool.New(ctx, dsn)
	if err != nil {
		t.Fatal(err)
	}
	defer pg.Close()

	var userID uuid.UUID
	err = pg.QueryRow(ctx, `SELECT id FROM users ORDER BY created_at DESC LIMIT 1`).Scan(&userID)
	if errorsIsNoRows(err) {
		t.Skip("no users rows available")
	}
	if err != nil {
		t.Fatal(err)
	}

	companyID := uuid.New()
	if _, err := pg.Exec(ctx, `INSERT INTO companies (id, name) VALUES ($1, $2)`, companyID, "start-split-test"); err != nil {
		t.Fatal(err)
	}
	defer func() {
		_, _ = pg.Exec(context.Background(), `DELETE FROM processing_job_products WHERE job_id IN (SELECT id FROM processing_jobs WHERE company_id = $1)`, companyID)
		_, _ = pg.Exec(context.Background(), `DELETE FROM processing_jobs WHERE company_id = $1`, companyID)
		_, _ = pg.Exec(context.Background(), `DELETE FROM raw_products WHERE company_id = $1`, companyID)
		_, _ = pg.Exec(context.Background(), `DELETE FROM companies WHERE id = $1`, companyID)
	}()

	rawIDs := make([]uuid.UUID, 5)
	for i := range rawIDs {
		rawIDs[i] = uuid.New()
		gtin := fmt.Sprintf("split-test-%d-%s", i, companyID.String()[:8])
		if _, err := pg.Exec(ctx, `
			INSERT INTO raw_products (id, company_id, gtin, raw_data, mapped_data, is_processed, processing_status)
			VALUES ($1, $2, $3, '{}'::jsonb, '{}'::jsonb, false, 'unprocessed')`,
			rawIDs[i], companyID, gtin); err != nil {
			t.Fatal(err)
		}
	}

	testMaxJobProducts = 2
	defer func() { testMaxJobProducts = 0 }()

	p := NewPipeline(pg)
	p.Billing = nil
	p.Limiter = nil

	jobs, err := p.StartJob(ctx, companyID, userID, rawIDs, "full")
	if err != nil {
		t.Fatal(err)
	}

	if len(jobs) != 3 {
		t.Fatalf("jobs=%d want 3 (5 products / cap 2)", len(jobs))
	}
	totals := 0
	for i, job := range jobs {
		want := 2
		if i == 2 {
			want = 1
		}
		if job.TotalProducts != want {
			t.Fatalf("job[%d].TotalProducts=%d want %d", i, job.TotalProducts, want)
		}
		if job.Status != "pending" {
			t.Fatalf("job[%d].Status=%q", i, job.Status)
		}
		totals += job.TotalProducts

		var n int
		if err := pg.QueryRow(ctx, `
			SELECT count(*) FROM processing_job_products
			WHERE job_id = $1 AND status = 'pending'`, job.ID).Scan(&n); err != nil {
			t.Fatal(err)
		}
		if n != want {
			t.Fatalf("job[%d] product rows=%d want %d", i, n, want)
		}
	}
	if totals != len(rawIDs) {
		t.Fatalf("total products=%d want %d", totals, len(rawIDs))
	}
}