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// fluxrec command-line tool.
// Personal Miniflux article recommender; see README.md.
package main

import (
	"errors"
	"flag"
	"fmt"
	"os"

	"fluxrec/cmds"
	"fluxrec/core"
)

func main() {
	if len(os.Args) < 2 {
		printHelp()
		os.Exit(1)
	}

	cmdName := os.Args[1]
	args := os.Args[2:]

	if cmdName == "help" || cmdName == "--help" || cmdName == "-h" {
		printHelp()
		return
	}

	var cmd core.Command
	switch cmdName {
	case "score":
		cmd = &cmds.ScoreCommand{}
	case "export":
		cmd = &cmds.ExportCommand{}
	case "train":
		cmd = &cmds.TrainCommand{}
	case "serve":
		cmd = &cmds.ServeCommand{}
	case "retrostar":
		cmd = &cmds.RetrostarCommand{}
	default:
		fmt.Fprintf(os.Stderr, "Unknown command: %s\n\n", cmdName)
		printHelp()
		os.Exit(1)
	}

	if err := cmd.Init(args); err != nil {
		if errors.Is(err, flag.ErrHelp) {
			os.Exit(0)
		}
		fmt.Fprintf(os.Stderr, "Error initializing %s command: %v\n", cmdName, err)
		os.Exit(1)
	}

	if err := cmd.Run(os.Stdin, os.Stdout); err != nil {
		fmt.Fprintf(os.Stderr, "Error running %s command: %v\n", cmdName, err)
		os.Exit(1)
	}
}

func printHelp() {
	fmt.Printf(`fluxrec <command> [arguments]

Personal Miniflux article recommender (see README.md).

Commands:
    score           Score stdin titles with a trained model (debugging)
    export          Pull starred + sampled negatives from Miniflux into labels.jsonl
    train           Train a TF-IDF + LR model from labels.jsonl
    serve           Poll Miniflux, score, serve recommendations RSS (server)
    retrostar       Model-ranked candidates for retroactive starring (cold start)

Usage:
    echo "some title" | fluxrec score --model model.json
`)
}