package api

import (
	"context"

	"github.com/tigorlazuardi/bluemage/go/gen/jet/model"
	"github.com/tigorlazuardi/bluemage/go/pkg/errs"
	"github.com/tigorlazuardi/bluemage/go/pkg/telemetry"

	. "github.com/go-jet/jet/v2/sqlite"
	. "github.com/tigorlazuardi/bluemage/go/gen/jet/table"
)

type ListSubredditsRequest struct {
	Search   string
	Disabled *bool
	Limit    int64
	Offset   int64
	OrderBy  string
	Sort     Sort
}

func (request ListSubredditsRequest) Statement() SelectStatement {
	cond := Bool(true)

	if request.Search != "" {
		cond.AND(Subreddits.Name.LIKE(String("%" + request.Search + "%")))
	}
	if request.Disabled != nil {
		b := *request.Disabled
		if b {
			cond.AND(Subreddits.Disabled.EQ(Int(1)))
		} else {
			cond.AND(Subreddits.Disabled.EQ(Int(0)))
		}
	}

	stmt := SELECT(Subreddits.AllColumns).WHERE(cond)

	if request.Limit > 0 {
		stmt.LIMIT(request.Limit)
	}

	if request.Offset > 0 {
		stmt.OFFSET(request.Offset)
	}

	if request.OrderBy == "" {
		return stmt.ORDER_BY(Subreddits.UpdatedAt.DESC())
	}

	orderBy := StringColumn(request.OrderBy)
	if request.Sort == SortDesc {
		return stmt.ORDER_BY(orderBy.DESC())
	} else {
		return stmt.ORDER_BY(orderBy.ASC())
	}
}

func (api *API) ListSubreddits(ctx context.Context, request ListSubredditsRequest) (subreddits []model.Subreddits, err error) {
	ctx, span := tracer.Start(ctx, "ListSubreddits")
	defer func() { telemetry.EndWithStatus(span, err) }()

	stmt := request.Statement()
	err = stmt.QueryContext(ctx, api.DB, &subreddits)
	if err != nil {
		err = errs.Wrapw(
			err, "failed to list subreddits",
			"request", request,
			"query", stmt.DebugSql(),
		)
		return subreddits, err
	}

	return subreddits, nil
}