package assets

import (
	"flag"
	"fmt"
	"io"

	"git.westgate.pw/ShadowsOverWestgate/sow-tools/internal/assets/mdl"
)

// mdlExt is the file set shared by the mdl commands.
var mdlExt = map[string]bool{".mdl": true}

// runCheckMDL reports uncompiled ASCII .mdl files and model-name mismatches.
// Read-only. Exit exitFail if any problem is found.
func runCheckMDL(args []string, stdout, stderr io.Writer) int {
	fs := flag.NewFlagSet("check-mdl", flag.ContinueOnError)
	fs.SetOutput(stderr)
	nonRecursive := fs.Bool("non-recursive", false, "do not descend into subdirectories")
	if err := fs.Parse(args); err != nil {
		return exitUsage
	}
	paths := fs.Args()
	if len(paths) == 0 {
		fmt.Fprintln(stderr, "assets check-mdl: usage: check-mdl <path>...")
		return exitUsage
	}

	files, err := walk(paths, mdlExt, !*nonRecursive)
	if err != nil {
		fmt.Fprintln(stderr, "assets check-mdl:", err)
		return exitUsage
	}

	fail := false
	for _, f := range files {
		ascii, err := mdl.IsASCII(f)
		if err != nil {
			fmt.Fprintln(stderr, "assets check-mdl:", err)
			return exitTool
		}
		if ascii {
			fmt.Fprintf(stderr, "uncompiled ascii mdl: %s\n", f)
			fail = true
		}
		mismatches, err := mdl.CheckNames(f)
		if err != nil {
			fmt.Fprintln(stderr, "assets check-mdl:", err)
			return exitTool
		}
		expected := mdl.ExpectedName(f)
		for _, m := range mismatches {
			if m.Line == 0 {
				fmt.Fprintf(stderr, "%s: mdl model-name mismatch: root node is %s, expected %s\n", f, m.Got, expected)
			} else {
				fmt.Fprintf(stderr, "%s: mdl model-name mismatch: line %d: %s is %s, expected %s\n", f, m.Line, m.What, m.Got, expected)
			}
			fail = true
		}
	}
	if fail {
		fmt.Fprintln(stderr, "check-mdl: found broken or uncompiled .mdl file(s)")
		return exitFail
	}
	fmt.Fprintln(stdout, "check-mdl: OK")
	return exitOK
}