package index_usage

import (
	"context"
	_ "embed"
	"fmt"

	"github.com/go-errors/errors"
	"github.com/jackc/pgconn"
	"github.com/jackc/pgx/v4"
	"github.com/spf13/afero"
	"github.com/supabase/cli/internal/db/reset"
	"github.com/supabase/cli/internal/migration/list"
	"github.com/supabase/cli/internal/utils"
	"github.com/supabase/cli/pkg/pgxv5"
)

//go:embed index_usage.sql
var IndexUsageQuery string

type Result struct {
	Name                        string
	Percent_of_times_index_used string
	Rows_in_table               int64
}

func Run(ctx context.Context, config pgconn.Config, fsys afero.Fs, options ...func(*pgx.ConnConfig)) error {
	conn, err := utils.ConnectByConfig(ctx, config, options...)
	if err != nil {
		return err
	}
	defer conn.Close(context.Background())
	rows, err := conn.Query(ctx, IndexUsageQuery, reset.LikeEscapeSchema(utils.InternalSchemas))
	if err != nil {
		return errors.Errorf("failed to query rows: %w", err)
	}
	result, err := pgxv5.CollectRows[Result](rows)
	if err != nil {
		return err
	}
	// TODO: implement a markdown table marshaller
	table := "|Table name|Percentage of times index used|Rows in table|\n|-|-|-|\n"
	for _, r := range result {
		table += fmt.Sprintf("|`%s`|`%s`|`%d`|\n", r.Name, r.Percent_of_times_index_used, r.Rows_in_table)
	}
	return list.RenderTable(table)
}