package main

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

func TestIntentProvenance(t *testing.T) {
	for _, status := range []goalStatus{active, paused, "complete", "budgetLimited", "usageLimited", blocked} {
		got, ok, err := parseIntent(intentLine(status))
		if err != nil || !ok || got != status {
			t.Fatalf("status=%s got=%s match=%v error=%v", status, got, ok, err)
		}
	}
	line := string(intentLine(active))
	for _, text := range []string{
		strings.Replace(line, "user.goal", "user.input", 1),
		strings.Replace(line, "\"role\":\"user\"", "\"role\":\"assistant\"", 1),
		strings.Replace(line, "input_text", "output_text", 1),
	} {
		if _, ok, err := parseIntent([]byte(text)); err != nil || ok {
			t.Fatalf("accepted untrusted instruction: match=%v error=%v", ok, err)
		}
	}
}

func TestIntentTail(t *testing.T) {
	path := filepath.Join(t.TempDir(), "rollout.jsonl")
	if err := os.WriteFile(path, intentLine(active), 0600); err != nil {
		t.Fatal(err)
	}
	log, err := openIntent(path)
	if err != nil {
		t.Fatal(err)
	}
	if status, err := log.read(math.MaxInt64); err != nil || status != "" {
		t.Fatal("replayed historical authorization")
	}
	data := intentLine(paused)
	appendIntent(t, path, data[:len(data)/2])
	if status, err := log.read(math.MaxInt64); err != nil || status != "" {
		t.Fatal("accepted partial record")
	}
	appendIntent(t, path, data[len(data)/2:])
	if status, err := log.read(math.MaxInt64); err != nil || status != paused {
		t.Fatalf("partial completion: %s %v", status, err)
	}
	appendIntent(t, path, intentLine(active))
	if err := log.seal(); err != nil {
		t.Fatal(err)
	}
	if status, err := log.read(math.MaxInt64); err != nil || status != "" {
		t.Fatal("replayed pre-cancellation authorization")
	}
	appendIntent(t, path, intentLine(active))
	if status, err := log.read(math.MaxInt64); err != nil || status != active {
		t.Fatalf("new authorization: %s %v", status, err)
	}
}

func TestIntentFence(t *testing.T) {
	path := filepath.Join(t.TempDir(), "rollout.jsonl")
	if err := os.WriteFile(path, nil, 0600); err != nil {
		t.Fatal(err)
	}
	log, err := openIntent(path)
	if err != nil {
		t.Fatal(err)
	}
	data := intentLine(active)
	appendIntent(t, path, data[:len(data)/2])
	if err := log.seal(); err != nil {
		t.Fatal(err)
	}
	appendIntent(t, path, data[len(data)/2:])
	if status, err := log.read(math.MaxInt64); err != nil || status != "" {
		t.Fatalf("replayed instruction spanning cancellation: %s %v", status, err)
	}
	appendIntent(t, path, intentLine(active))
	if status, err := log.read(math.MaxInt64); err != nil || status != active {
		t.Fatalf("new instruction after cancellation: %s %v", status, err)
	}
}

func TestIntentCut(t *testing.T) {
	path := filepath.Join(t.TempDir(), "rollout.jsonl")
	if err := os.WriteFile(path, nil, 0600); err != nil {
		t.Fatal(err)
	}
	log, err := openIntent(path)
	if err != nil {
		t.Fatal(err)
	}
	appendIntent(t, path, intentLine(paused))
	end, err := log.end()
	if err != nil {
		t.Fatal(err)
	}
	appendIntent(t, path, intentLine(active))
	if status, err := log.read(end); err != nil || status != paused {
		t.Fatalf("read beyond captured input: %s %v", status, err)
	}
	if status, err := log.read(math.MaxInt64); err != nil || status != active {
		t.Fatalf("lost later input: %s %v", status, err)
	}
}