package repository

import (
	dbgen "Yimaru-Backend/gen/db"
	"Yimaru-Backend/internal/domain"
	"Yimaru-Backend/internal/ports"
	"context"

	"github.com/jackc/pgx/v5/pgtype"
)

func NewRBACStore(s *Store) ports.RBACStore { return s }

func (s *Store) CreateRole(ctx context.Context, name, description string, isSystem bool) (domain.RoleRecord, error) {
	r, err := s.queries.CreateRole(ctx, dbgen.CreateRoleParams{
		Name:        name,
		Description: description,
		IsSystem:    isSystem,
	})
	if err != nil {
		return domain.RoleRecord{}, err
	}
	return mapRole(r), nil
}

func (s *Store) GetRoleByID(ctx context.Context, id int64) (domain.RoleRecord, error) {
	r, err := s.queries.GetRoleByID(ctx, id)
	if err != nil {
		return domain.RoleRecord{}, err
	}
	return mapRole(r), nil
}

func (s *Store) GetRoleByName(ctx context.Context, name string) (domain.RoleRecord, error) {
	r, err := s.queries.GetRoleByName(ctx, name)
	if err != nil {
		return domain.RoleRecord{}, err
	}
	return mapRole(r), nil
}

func (s *Store) ListRoles(ctx context.Context, filter domain.RoleListFilter) ([]domain.RoleRecord, int64, error) {
	var queryParam pgtype.Text
	if filter.Query != "" {
		queryParam = pgtype.Text{String: filter.Query, Valid: true}
	}

	var isSystemParam pgtype.Bool
	if filter.IsSystem != nil {
		isSystemParam = pgtype.Bool{Bool: *filter.IsSystem, Valid: true}
	}

	limit := int32(filter.PageSize)
	if limit <= 0 {
		limit = 20
	}
	offset := int32(filter.Page * filter.PageSize)

	rows, err := s.queries.ListRoles(ctx, dbgen.ListRolesParams{
		Query:    queryParam,
		IsSystem: isSystemParam,
		Limit:    pgtype.Int4{Int32: limit, Valid: true},
		Offset:   pgtype.Int4{Int32: offset, Valid: true},
	})
	if err != nil {
		return nil, 0, err
	}

	if len(rows) == 0 {
		return []domain.RoleRecord{}, 0, nil
	}

	totalCount := rows[0].TotalCount
	roles := make([]domain.RoleRecord, len(rows))
	for i, r := range rows {
		rec := domain.RoleRecord{
			ID:          r.ID,
			Name:        r.Name,
			Description: r.Description,
			IsSystem:    r.IsSystem,
			CreatedAt:   r.CreatedAt.Time,
		}
		if r.UpdatedAt.Valid {
			rec.UpdatedAt = &r.UpdatedAt.Time
		}
		roles[i] = rec
	}
	return roles, totalCount, nil
}

func (s *Store) UpdateRole(ctx context.Context, id int64, name, description string) error {
	return s.queries.UpdateRole(ctx, dbgen.UpdateRoleParams{
		ID:          id,
		Name:        name,
		Description: description,
	})
}

func (s *Store) DeleteRole(ctx context.Context, id int64) error {
	return s.queries.DeleteRole(ctx, id)
}

func (s *Store) UpsertPermission(ctx context.Context, seed domain.PermissionSeed) (domain.Permission, error) {
	p, err := s.queries.UpsertPermission(ctx, dbgen.UpsertPermissionParams{
		Key:         seed.Key,
		Name:        seed.Name,
		Description: seed.Description,
		GroupName:   seed.GroupName,
	})
	if err != nil {
		return domain.Permission{}, err
	}
	return mapPermission(p), nil
}

func (s *Store) ListPermissions(ctx context.Context) ([]domain.Permission, error) {
	rows, err := s.queries.ListPermissions(ctx)
	if err != nil {
		return nil, err
	}
	perms := make([]domain.Permission, len(rows))
	for i, p := range rows {
		perms[i] = mapPermission(p)
	}
	return perms, nil
}

func (s *Store) ListPermissionGroups(ctx context.Context) ([]string, error) {
	return s.queries.ListPermissionGroups(ctx)
}

func (s *Store) GetPermissionByKey(ctx context.Context, key string) (domain.Permission, error) {
	p, err := s.queries.GetPermissionByKey(ctx, key)
	if err != nil {
		return domain.Permission{}, err
	}
	return mapPermission(p), nil
}

func (s *Store) SetRolePermissions(ctx context.Context, roleID int64, permissionIDs []int64) error {
	if err := s.queries.SetRolePermissions(ctx, roleID); err != nil {
		return err
	}
	if len(permissionIDs) > 0 {
		return s.queries.BulkAssignPermissionsToRole(ctx, dbgen.BulkAssignPermissionsToRoleParams{
			RoleID:  roleID,
			Column2: permissionIDs,
		})
	}
	return nil
}

func (s *Store) GetRolePermissions(ctx context.Context, roleID int64) ([]domain.Permission, error) {
	rows, err := s.queries.GetRolePermissions(ctx, roleID)
	if err != nil {
		return nil, err
	}
	perms := make([]domain.Permission, len(rows))
	for i, p := range rows {
		perms[i] = mapPermission(p)
	}
	return perms, nil
}

func (s *Store) GetAllRolesWithPermissions(ctx context.Context) (map[string]map[string]struct{}, error) {
	rows, err := s.queries.GetAllRolesWithPermissions(ctx)
	if err != nil {
		return nil, err
	}
	result := make(map[string]map[string]struct{})
	for _, row := range rows {
		if _, ok := result[row.RoleName]; !ok {
			result[row.RoleName] = make(map[string]struct{})
		}
		result[row.RoleName][row.PermissionKey] = struct{}{}
	}
	return result, nil
}

func mapRole(r dbgen.Role) domain.RoleRecord {
	rec := domain.RoleRecord{
		ID:          r.ID,
		Name:        r.Name,
		Description: r.Description,
		IsSystem:    r.IsSystem,
		CreatedAt:   r.CreatedAt.Time,
	}
	if r.UpdatedAt.Valid {
		rec.UpdatedAt = &r.UpdatedAt.Time
	}
	return rec
}

func mapPermission(p dbgen.Permission) domain.Permission {
	return domain.Permission{
		ID:          p.ID,
		Key:         p.Key,
		Name:        p.Name,
		Description: p.Description,
		GroupName:   p.GroupName,
		CreatedAt:   p.CreatedAt.Time,
	}
}