package bootstrap

import (
	"baron-sso-backend/internal/domain"
	"baron-sso-backend/internal/repository"
	"baron-sso-backend/internal/service"
	"context"
	"errors"
	"fmt"
	"log/slog"

	"gorm.io/gorm"
)

type InitialTenantConfig struct {
	Name        string
	Slug        string
	Type        string
	ParentSlug  string
	Description string
	Domains     []string
}

// Hardcoded for now, can be moved to config file or env later
var defaultTenants = []InitialTenantConfig{
	{
		Name: "한맥가족",
		Slug: "hanmac-family",
		Type: domain.TenantTypeCompanyGroup,
	},
	{
		Name:        "한맥기술",
		Slug:        "hanmac",
		Type:        domain.TenantTypeCompany,
		ParentSlug:  "hanmac-family",
		Description: "Primary Family Company",
		Domains:     []string{"hanmaceng.co.kr", "hmac.kr"},
	},
	{
		Name:       "삼안",
		Slug:       "saman",
		Type:       domain.TenantTypeCompany,
		ParentSlug: "hanmac-family",
		Domains:    []string{"samaneng.com"},
	},
}

func SeedTenants(db *gorm.DB) error {
	slog.Info("[Bootstrap] Seeding initial tenants...")
	repo := repository.NewTenantRepository(db)
	userRepo := repository.NewUserRepository(db)
	userGroupRepo := repository.NewUserGroupRepository(db)
	outboxRepo := repository.NewKetoOutboxRepository(db)
	svc := service.NewTenantService(repo, userRepo, userGroupRepo, outboxRepo)
	ctx := context.Background()

	for _, config := range defaultTenants {
		tenantType := config.Type
		if tenantType == "" {
			tenantType = domain.TenantTypeCompany
		}

		var parentID *string
		if config.ParentSlug != "" {
			parent, err := repo.FindBySlug(ctx, config.ParentSlug)
			if err != nil || parent == nil {
				if err == nil {
					err = errors.New("parent tenant not found")
				}
				slog.Error("Failed to resolve parent tenant for seed", "slug", config.Slug, "parentSlug", config.ParentSlug, "error", err)
				return fmt.Errorf("resolve parent tenant %q for seed %q: %w", config.ParentSlug, config.Slug, err)
			}
			parentID = &parent.ID
		}

		existing, err := repo.FindBySlug(ctx, config.Slug)
		if err == nil && existing != nil {
			slog.Info("[Bootstrap] Tenant already exists, checking domains...", "slug", config.Slug)
			changed := false
			if existing.Name != config.Name {
				existing.Name = config.Name
				changed = true
			}
			if existing.Type != tenantType {
				existing.Type = tenantType
				changed = true
			}
			if existing.Status != domain.TenantStatusActive {
				existing.Status = domain.TenantStatusActive
				changed = true
			}
			if config.ParentSlug != "" {
				if existing.ParentID == nil || *existing.ParentID != *parentID {
					existing.ParentID = parentID
					changed = true
					if err := outboxRepo.Create(ctx, &domain.KetoOutbox{
						Namespace: "Tenant",
						Object:    existing.ID,
						Relation:  "parents",
						Subject:   "Tenant:" + *parentID,
						Action:    domain.KetoOutboxActionCreate,
					}); err != nil {
						slog.Error("Failed to create outbox entry for seeded tenant hierarchy", "tenant", existing.ID, "error", err)
						return err
					}
				}
			} else if existing.ParentID != nil {
				existing.ParentID = nil
				changed = true
			}
			if changed {
				if err := repo.Update(ctx, existing); err != nil {
					slog.Error("Failed to update seeded tenant", "slug", config.Slug, "error", err)
					return err
				}
			}
			// Optional: Check and add missing domains
			for _, d := range config.Domains {
				found := false
				for _, ed := range existing.Domains {
					if ed.Domain == d {
						found = true
						break
					}
				}
				if !found {
					slog.Info("[Bootstrap] Adding missing domain to tenant", "slug", config.Slug, "domain", d)
					if err := repo.AddDomain(ctx, existing.ID, d, true); err != nil {
						slog.Error("Failed to add domain", "error", err)
					}
				}
			}
			continue
		}

		slog.Info("[Bootstrap] Creating default tenant", "name", config.Name, "slug", config.Slug)
		tenant, err := svc.RegisterTenant(ctx, config.Name, config.Slug, tenantType, config.Description, config.Domains, parentID, "")
		if err != nil {
			slog.Error("Failed to seed tenant", "slug", config.Slug, "error", err)
			return err
		}
		// Explicitly set to active during seed
		tenant.Status = domain.TenantStatusActive
		db.Save(tenant)
	}
	return nil
}