package repository

import (
	"context"
	"database/sql"
	"time"

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

type Sources interface {
	Create(ctx context.Context, source, displayName, url, tags string, enabled bool) (int64, error)
	GetById(ctx context.Context, id int64) (entity.SourceEntity, error)
	GetByDisplayName(ctx context.Context, displayName string) (entity.SourceEntity, error)
	GetBySource(ctx context.Context, source string) (entity.SourceEntity, error)
	GetBySourceAndName(ctx context.Context, source, name string) (entity.SourceEntity, error)
	List(ctx context.Context, page, limit int) ([]entity.SourceEntity, error)
	ListBySource(ctx context.Context, page, limit int, source string) ([]entity.SourceEntity, error)
	Enable(ctx context.Context, id int64) (int64, error)
	Disable(ctx context.Context, id int64) (int64, error)
	SoftDelete(ctx context.Context, id int64) (int64, error)
	Restore(ctx context.Context, id int64) (int64, error)
	Delete(ctx context.Context, id int64) (int64, error)
}

type sourceRepository struct {
	conn *sql.DB
}

func NewSourceRepository(conn *sql.DB) sourceRepository {
	return sourceRepository{
		conn: conn,
	}
}

func (r sourceRepository) Create(ctx context.Context, source, displayName, url, tags string, enabled bool) (int64, error) {
	dt := time.Now()
	queryBuilder := sqlbuilder.NewInsertBuilder()
	queryBuilder.InsertInto("Sources")
	queryBuilder.Cols("CreatedAt", "UpdatedAt", "DeletedAt", "DisplayName", "Source", "Url", "Tags", "Enabled")
	queryBuilder.Values(dt, dt, timeZero, displayName, source, url, tags, enabled)
	query, args := queryBuilder.Build()

	_, err := r.conn.ExecContext(ctx, query, args...)
	if err != nil {
		return 0, err
	}

	return 1, nil
}

func (r sourceRepository) GetById(ctx context.Context, id int64) (entity.SourceEntity, error) {
	b := sqlbuilder.NewSelectBuilder()
	b.Select("*")
	b.From("Sources").Where(
		b.Equal("Id", id),
	)
	b.Limit(1)
	query, args := b.Build()

	rows, err := r.conn.QueryContext(ctx, query, args...)
	if err != nil {
		return entity.SourceEntity{}, err
	}

	data, err := r.processRows(rows)
	if len(data) == 0 {
		return entity.SourceEntity{}, err
	}

	return data[0], nil
}

func (r sourceRepository) GetByDisplayName(ctx context.Context, displayName string) (entity.SourceEntity, error) {
	b := sqlbuilder.NewSelectBuilder()
	b.Select("*")
	b.From("Sources").Where(
		b.Equal("DisplayName", displayName),
	)
	b.Limit(1)
	query, args := b.Build()

	rows, err := r.conn.QueryContext(ctx, query, args...)
	if err != nil {
		return entity.SourceEntity{}, err
	}

	data, err := r.processRows(rows)
	if len(data) == 0 {
		return entity.SourceEntity{}, err
	}

	return data[0], nil
}

func (r sourceRepository) GetBySource(ctx context.Context, source string) (entity.SourceEntity, error) {
	b := sqlbuilder.NewSelectBuilder()
	b.Select("*")
	b.From("Sources").Where(
		b.Equal("Source", source),
	)
	b.Limit(1)
	query, args := b.Build()

	rows, err := r.conn.QueryContext(ctx, query, args...)
	if err != nil {
		return entity.SourceEntity{}, err
	}

	data, err := r.processRows(rows)
	if len(data) == 0 {
		return entity.SourceEntity{}, err
	}

	return data[0], nil
}

func (r sourceRepository) GetBySourceAndName(ctx context.Context, source, name string) (entity.SourceEntity, error) {
	b := sqlbuilder.NewSelectBuilder()
	b.Select("*")
	b.From("Sources").Where(
		b.Equal("Source", source),
		b.Equal("DisplayName", name),
	)
	b.Limit(1)
	query, args := b.Build()

	rows, err := r.conn.QueryContext(ctx, query, args...)
	if err != nil {
		return entity.SourceEntity{}, err
	}

	data, err := r.processRows(rows)
	if len(data) == 0 {
		return entity.SourceEntity{}, err
	}

	return data[0], nil
}

func (r sourceRepository) List(ctx context.Context, page, limit int) ([]entity.SourceEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("Sources")
	builder.Offset(page * limit)
	builder.Limit(limit)

	query, args := builder.Build()
	rows, err := r.conn.QueryContext(ctx, query, args...)
	if err != nil {
		return []entity.SourceEntity{}, err
	}

	data, err := r.processRows(rows)
	if len(data) == 0 {
		return []entity.SourceEntity{}, err
	}

	return data, nil
}

func (r sourceRepository) ListBySource(ctx context.Context, page, limit int, source string) ([]entity.SourceEntity, error) {
	builder := sqlbuilder.NewSelectBuilder()
	builder.Select("*")
	builder.From("Sources")
	builder.Where(
		builder.Equal("Source", source),
	)
	builder.Offset(page * limit)
	builder.Limit(limit)

	query, args := builder.Build()
	rows, err := r.conn.QueryContext(ctx, query, args...)
	if err != nil {
		return []entity.SourceEntity{}, err
	}

	data, err := r.processRows(rows)
	if len(data) == 0 {
		return []entity.SourceEntity{}, err
	}

	return data, nil
}

func (r sourceRepository) Enable(ctx context.Context, id int64) (int64, error) {
	b := sqlbuilder.NewUpdateBuilder()
	b.Update("Sources")
	b.Set(
		b.Assign("Enabled", true),
		b.Assign("UpdatedAt", time.Now()),
	)
	b.Where(
		b.Equal("Id", id),
	)
	query, args := b.Build()

	_, err := r.conn.ExecContext(ctx, query, args...)
	if err != nil {
		return 0, err
	}

	return 1, nil
}

func (r sourceRepository) Disable(ctx context.Context, id int64) (int64, error) {
	b := sqlbuilder.NewUpdateBuilder()
	b.Update("Sources")
	b.Set(
		b.Assign("Enabled", false),
		b.Assign("UpdatedAt", time.Now()),
	)
	b.Where(
		b.Equal("Id", id),
	)
	query, args := b.Build()

	_, err := r.conn.ExecContext(ctx, query, args...)
	if err != nil {
		return 0, err
	}

	return 1, nil
}

func (r sourceRepository) SoftDelete(ctx context.Context, id int64) (int64, error) {
	return softDeleteRow(ctx, r.conn, "Sources", id)
}

func (r sourceRepository) Restore(ctx context.Context, id int64) (int64, error) {
	return restoreRow(ctx, r.conn, "Sources", id)
}

func (r sourceRepository) Delete(ctx context.Context, id int64) (int64, error) {
	return deleteFromTable(ctx, r.conn, "Sources", id)
}

func (r sourceRepository) processRows(rows *sql.Rows) ([]entity.SourceEntity, error) {
	items := []entity.SourceEntity{}

	for rows.Next() {
		var id int64
		var createdAt time.Time
		var updatedAt time.Time
		var deletedAt time.Time
		var displayName string
		var source string
		var enabled bool
		var url string
		var tags string
		err := rows.Scan(
			&id, &createdAt, &updatedAt,
			&deletedAt, &displayName, &source,
			&enabled, &url, &tags,
		)
		if err != nil {
			return items, err
		}

		item := entity.SourceEntity{
			ID:          id,
			CreatedAt:   createdAt,
			UpdatedAt:   updatedAt,
			DeletedAt:   deletedAt,
			DisplayName: displayName,
			Source:      source,
			Enabled:     enabled,
			Url:         url,
			Tags:        tags,
		}

		items = append(items, item)
	}

	return items, nil
}