package validate

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"thehouseoficarus/internal/behavior"
	"thehouseoficarus/internal/item"
	"thehouseoficarus/internal/object"
	"thehouseoficarus/internal/world"
)

// Regression: a talk config with nodes but no "start" node is dead content at
// runtime; validation must report it.
func TestValidateTalkConfigRequiresStartNode(t *testing.T) {
	cfg := &behavior.TalkConfig{Nodes: map[string]behavior.TalkNode{
		"greet": {Messages: []string{"hi"}},
	}}
	issues := validateTalkConfig("test", cfg, nil, nil, nil, nil)
	found := false
	for _, iss := range issues {
		if strings.Contains(iss.Message, "start") {
			found = true
		}
	}
	if !found {
		t.Fatalf("missing start node not reported: %+v", issues)
	}

	clean := &behavior.TalkConfig{Nodes: map[string]behavior.TalkNode{"start": {}}}
	for _, iss := range validateTalkConfig("test", clean, nil, nil, nil, nil) {
		if strings.Contains(iss.Message, "start") {
			t.Fatalf("start node wrongly reported: %+v", iss)
		}
	}
}

// Regression: an unknown craft type/subtype leaves the action set but never
// advancing, so the player appears stuck; it must be an ERROR.
func TestValidateCraftBlocksRejectsUnknownType(t *testing.T) {
	dir := t.TempDir()
	if err := os.MkdirAll(filepath.Join(dir, "items"), 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dir, "items", "thing.yaml"),
		[]byte("name: thing\ncraft:\n  - type: smiting\n    ingredients:\n      - items: [ore]\n        quantity: 1\n"), 0644); err != nil {
		t.Fatal(err)
	}
	src := Source{
		DataDir: dir,
		Items:   item.NewItemStore(dir),
		Objects: object.NewObjectStore(dir),
		Mobs:    world.NewMobStore(dir),
		World:   world.New(dir),
	}
	found := false
	for _, issue := range validateCraftBlocks(src) {
		if strings.Contains(issue.Message, "unknown type/subtype") {
			found = true
			if issue.Level != "ERROR" {
				t.Fatalf("unknown craft type must be an ERROR: %+v", issue)
			}
		}
	}
	if !found {
		t.Fatal("expected an ERROR for an unknown craft type/subtype")
	}
}

// Regression: an unknown safespot max_block_size silently disables cover; it
// must be an ERROR.
func TestValidateObjectsRejectsUnknownSafespotSize(t *testing.T) {
	dir := t.TempDir()
	if err := os.MkdirAll(filepath.Join(dir, "objects"), 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dir, "objects", "rock.yaml"),
		[]byte("name: rock\nsafespot:\n  max_block_size: huge\n"), 0644); err != nil {
		t.Fatal(err)
	}
	src := Source{
		DataDir: dir,
		Items:   item.NewItemStore(dir),
		Objects: object.NewObjectStore(dir),
		Mobs:    world.NewMobStore(dir),
		World:   world.New(dir),
	}
	found := false
	for _, issue := range validateObjects(src) {
		if strings.Contains(issue.Message, "max_block_size") {
			found = true
			if issue.Level != "ERROR" {
				t.Fatalf("unknown safespot size must be an ERROR: %+v", issue)
			}
		}
	}
	if !found {
		t.Fatal("expected an ERROR for an unknown safespot.max_block_size")
	}
}

// Regression: a gather drop with weight <= 0 can never be selected (the
// weighted roll has zero total); it must be flagged.
func TestValidateGatherWarnsOnWeightlessDrop(t *testing.T) {
	cfg := &behavior.GatherConfig{Drops: []behavior.DropEntry{{ItemID: "ore", Weight: 0}}}
	issues := validateGather("test", cfg, map[string]bool{"ore": true}, map[string]bool{})
	found := false
	for _, iss := range issues {
		if strings.Contains(iss.Message, "weight") {
			found = true
		}
	}
	if !found {
		t.Fatalf("weightless drop not warned: %+v", issues)
	}
}