package repository

import (
	"database/sql"
	"errors"
	"fmt"
	"time"

	"git.jamestombleson.com/jtom38/newsbot-api/internal/domain"
	"github.com/huandu/go-sqlbuilder"
)

const (
	ArticleOrderByPublishDateDesc = "pubDate desc"
	ArticleOrderByPublishDatAsc   = "pubDate asc"
)

type ArticleRepository struct {
	conn          *sql.DB
	defaultLimit  int
	defaultOffset int
}

func NewArticleRepository(conn *sql.DB) ArticleRepository {
	return ArticleRepository{
		conn:          conn,
		defaultLimit:  50,
		defaultOffset: 50,
	}
}

func (ar ArticleRepository) GetById(id int64) (domain.ArticleEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("articles").Where(
		builder.E("id", id),
	)
	builder.Limit(1)

	query, args := builder.Build()
	rows, err := ar.conn.Query(query, args...)
	if err != nil {
		return domain.ArticleEntity{}, err
	}

	data := ar.processRows(rows)
	if len(data) == 0 {
		return domain.ArticleEntity{}, errors.New(ErrUserNotFound)
	}

	return data[0], nil
}

func (ar ArticleRepository) GetByUrl(url string) (domain.ArticleEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("articles").Where(
		builder.E("url", url),
	)
	builder.Limit(1)

	query, args := builder.Build()
	rows, err := ar.conn.Query(query, args...)
	if err != nil {
		return domain.ArticleEntity{}, err
	}

	data := ar.processRows(rows)
	if len(data) == 0 {
		return domain.ArticleEntity{}, errors.New(ErrUserNotFound)
	}

	return data[0], nil
}

func (ar ArticleRepository) ListTop(limit int) ([]domain.ArticleEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("articles")
	builder.Limit(limit)

	query, args := builder.Build()
	rows, err := ar.conn.Query(query, args...)
	if err != nil {
		return []domain.ArticleEntity{}, err
	}

	data := ar.processRows(rows)
	if len(data) == 0 {
		return []domain.ArticleEntity{}, errors.New(ErrUserNotFound)
	}

	return data, nil
}

func (ar ArticleRepository) ListByPage(page, limit int) ([]domain.ArticleEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("articles")
	builder.OrderBy("pubdate desc")
	builder.Offset(page * limit)
	builder.Limit(limit)

	query, args := builder.Build()
	rows, err := ar.conn.Query(query, args...)
	if err != nil {
		return []domain.ArticleEntity{}, err
	}

	data := ar.processRows(rows)
	if len(data) == 0 {
		return []domain.ArticleEntity{}, errors.New(ErrUserNotFound)
	}

	return data, nil
}

func (ar ArticleRepository) ListByPublishDate(page, limit int, orderBy string) ([]domain.ArticleEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("articles")
	if orderBy != "" {
		builder.OrderBy(orderBy)
	}
	builder.Offset(page * limit)
	builder.Limit(limit)

	query, args := builder.Build()
	rows, err := ar.conn.Query(query, args...)
	if err != nil {
		return []domain.ArticleEntity{}, err
	}

	data := ar.processRows(rows)
	if len(data) == 0 {
		return []domain.ArticleEntity{}, errors.New(ErrUserNotFound)
	}
	return data, nil
}

func (ar ArticleRepository) ListBySource(page, limit int, orderBy string) ([]domain.ArticleEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("articles")
	builder.JoinWithOption("InnerJoin", "sources", "articles.sourceId=sources.Id")
	if orderBy != "" {
		builder.OrderBy(orderBy)
	}
	builder.Offset(50)
	builder.Limit(page * limit)

	query, args := builder.Build()
	rows, err := ar.conn.Query(query, args...)
	if err != nil {
		return []domain.ArticleEntity{}, err
	}

	data := ar.processRows(rows)
	if len(data) == 0 {
		return []domain.ArticleEntity{}, errors.New(ErrUserNotFound)
	}
	return data, nil
}

func (ar ArticleRepository) Create(sourceId int64, tags, title, url, thumbnailUrl, description, authorName, authorImageUrl string, pubDate time.Time, isVideo bool) (int64, error) {
	dt := time.Now()
	queryBuilder := sqlbuilder.NewInsertBuilder()
	queryBuilder.InsertInto("articles")
	queryBuilder.Cols("UpdatedAt", "CreatedAt", "DeletedAt", "SourceId", "Tags", "Title", "Url", "PubDate", "IsVideo", "ThumbnailUrl", "Description", "AuthorName", "AuthorImageUrl")
	queryBuilder.Values(dt, dt, timeZero, sourceId, tags, title, url, pubDate, isVideo, thumbnailUrl, description, authorName, authorImageUrl)
	query, args := queryBuilder.Build()

	_, err := ar.conn.Exec(query, args...)
	if err != nil {
		return 0, err
	}

	return 1, nil
}

func (ur ArticleRepository) processRows(rows *sql.Rows) []domain.ArticleEntity {
	items := []domain.ArticleEntity{}

	for rows.Next() {
		var id int64
		var createdAt time.Time
		var updatedAt time.Time
		var deletedAt time.Time
		var sourceId int64
		var tags string
		var title string
		var url string
		var pubDate time.Time
		var isVideo bool
		var thumbnail string
		var description string
		var authorName string
		var authorImageUrl string
		err := rows.Scan(
			&id, &createdAt, &updatedAt,
			&deletedAt, &sourceId, &tags,
			&title, &url, &pubDate,
			&isVideo, &thumbnail, &description,
			&authorName, &authorImageUrl)
		if err != nil {
			fmt.Println(err)
		}

		item := domain.ArticleEntity{
			ID:             id,
			CreatedAt:      createdAt,
			UpdatedAt:      updatedAt,
			DeletedAt:      deletedAt,
			SourceID:       sourceId,
			Tags:           tags,
			Title:          title,
			Url:            url,
			PubDate:        pubDate,
			IsVideo:        isVideo,
			Thumbnail:      thumbnail,
			Description:    description,
			AuthorName:     authorName,
			AuthorImageUrl: authorImageUrl,
		}

		items = append(items, item)
	}

	return items
}