// Local review harness — entry point.
//
// Subcommands per PROMPT.md:
//   repo /path        — full-repo review (Phase B MVP)
//   diff /path        — diff/PR-style review (Phase E)
//   scrum /path       — scrum-test report bundle (Phase B MVP)
//   rules /path       — rules audit (Phase E)
//   model doctor      — Ollama probe + JSON shape (Phase A stub, Phase C real)
//
// PROMPT.md hard rules apply: no cloud deps, no auto-commit, no
// destructive changes to the target repo, no fake success.
package main

import (
	"flag"
	"fmt"
	"os"

	"local-review-harness/internal/cli"
)

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

	// Per-subcommand flag sets. Common flags (--review-profile,
	// --model-profile, --output-dir) live on each FlagSet rather than
	// a global pre-parser; the CLI library would be overkill for 5
	// subcommands.
	sub := os.Args[1]
	args := os.Args[2:]

	switch sub {
	case "repo":
		os.Exit(cli.Repo(args))
	case "diff":
		os.Exit(cli.Diff(args))
	case "scrum":
		os.Exit(cli.Scrum(args))
	case "rules":
		fmt.Fprintln(os.Stderr, "rules: not implemented in MVP (Phase E)")
		os.Exit(64)
	case "model":
		// Two-token verb: "model doctor"
		if len(args) < 1 {
			fmt.Fprintln(os.Stderr, "model: missing verb (try: model doctor)")
			os.Exit(2)
		}
		switch args[0] {
		case "doctor":
			os.Exit(cli.ModelDoctor(args[1:]))
		default:
			fmt.Fprintf(os.Stderr, "model: unknown verb %q\n", args[0])
			os.Exit(2)
		}
	case "-h", "--help", "help":
		usage()
		os.Exit(0)
	case "version":
		fmt.Println("review-harness 0.1.0 (Phase A skeleton)")
		os.Exit(0)
	default:
		fmt.Fprintf(os.Stderr, "unknown subcommand: %q\n", sub)
		usage()
		os.Exit(2)
	}
	_ = flag.CommandLine // keep import stable across phases
}

func usage() {
	fmt.Fprint(os.Stderr, `review-harness — local-first code review

Usage:
  review-harness repo <path>             full-repo review (MVP)
  review-harness scrum <path>            scrum-test report bundle (MVP)
  review-harness model doctor            probe Ollama / configured models
  review-harness diff <path>             diff review (Phase E, not yet)
  review-harness rules <path>            rules audit (Phase E, not yet)
  review-harness version                 print version
  review-harness help                    this message

Common flags (per subcommand):
  --review-profile <path>                YAML; defaults applied if omitted
  --model-profile <path>                 YAML; defaults applied if omitted
  --output-dir <path>                    override review-profile output dir
  --enable-llm                           also run local-Ollama LLM review (Phase C)
`)
}