package sqlite

import (
	"context"
	"fmt"
	"strconv"

	"go.signoz.io/signoz/ee/query-service/model"
	basemodel "go.signoz.io/signoz/pkg/query-service/model"
	"go.uber.org/zap"
)

func (m *modelDao) CreatePAT(ctx context.Context, p model.PAT) (model.PAT, basemodel.BaseApiError) {
	result, err := m.DB().ExecContext(ctx,
		"INSERT INTO personal_access_tokens (user_id, token, name, created_at, expires_at) VALUES ($1, $2, $3, $4, $5)",
		p.UserID,
		p.Token,
		p.Name,
		p.CreatedAt,
		p.ExpiresAt)
	if err != nil {
		zap.S().Errorf("Failed to insert PAT in db, err: %v", zap.Error(err))
		return model.PAT{}, model.InternalError(fmt.Errorf("PAT insertion failed"))
	}
	id, err := result.LastInsertId()
	if err != nil {
		zap.S().Errorf("Failed to get last inserted id, err: %v", zap.Error(err))
		return model.PAT{}, model.InternalError(fmt.Errorf("PAT insertion failed"))
	}
	p.Id = strconv.Itoa(int(id))
	return p, nil
}

func (m *modelDao) ListPATs(ctx context.Context, userID string) ([]model.PAT, basemodel.BaseApiError) {
	pats := []model.PAT{}

	if err := m.DB().Select(&pats, `SELECT * FROM personal_access_tokens WHERE user_id=?;`, userID); err != nil {
		zap.S().Errorf("Failed to fetch PATs for user: %s, err: %v", userID, zap.Error(err))
		return nil, model.InternalError(fmt.Errorf("failed to fetch PATs"))
	}
	return pats, nil
}

func (m *modelDao) DeletePAT(ctx context.Context, id string) basemodel.BaseApiError {
	_, err := m.DB().ExecContext(ctx, `DELETE from personal_access_tokens where id=?;`, id)
	if err != nil {
		zap.S().Errorf("Failed to delete PAT, err: %v", zap.Error(err))
		return model.InternalError(fmt.Errorf("failed to delete PAT"))
	}
	return nil
}

func (m *modelDao) GetPAT(ctx context.Context, token string) (*model.PAT, basemodel.BaseApiError) {
	pats := []model.PAT{}

	if err := m.DB().Select(&pats, `SELECT * FROM personal_access_tokens WHERE token=?;`, token); err != nil {
		return nil, model.InternalError(fmt.Errorf("failed to fetch PAT"))
	}

	if len(pats) != 1 {
		return nil, &model.ApiError{
			Typ: model.ErrorInternal,
			Err: fmt.Errorf("found zero or multiple PATs with same token, %s", token),
		}
	}

	return &pats[0], nil
}

func (m *modelDao) GetPATByID(ctx context.Context, id string) (*model.PAT, basemodel.BaseApiError) {
	pats := []model.PAT{}

	if err := m.DB().Select(&pats, `SELECT * FROM personal_access_tokens WHERE id=?;`, id); err != nil {
		return nil, model.InternalError(fmt.Errorf("failed to fetch PAT"))
	}

	if len(pats) != 1 {
		return nil, &model.ApiError{
			Typ: model.ErrorInternal,
			Err: fmt.Errorf("found zero or multiple PATs with same token"),
		}
	}

	return &pats[0], nil
}

func (m *modelDao) GetUserByPAT(ctx context.Context, token string) (*basemodel.UserPayload, basemodel.BaseApiError) {
	users := []basemodel.UserPayload{}

	query := `SELECT
				u.id,
				u.name,
				u.email,
				u.password,
				u.created_at,
				u.profile_picture_url,
				u.org_id,
				u.group_id
			  FROM users u, personal_access_tokens p
			  WHERE u.id = p.user_id and p.token=? and p.expires_at >= strftime('%s', 'now');`

	if err := m.DB().Select(&users, query, token); err != nil {
		return nil, model.InternalError(fmt.Errorf("failed to fetch user from PAT, err: %v", err))
	}

	if len(users) != 1 {
		return nil, &model.ApiError{
			Typ: model.ErrorInternal,
			Err: fmt.Errorf("found zero or multiple users with same PAT token"),
		}
	}
	return &users[0], nil
}