package config_test

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

var composeFilesForFlagCheck = []string{
	"docker-compose.dev.yml",
	"docker-compose.test.yml",
	"docker-compose.main.yml",
}

func readComposeFile(t *testing.T, name string) string {
	t.Helper()
	root := composeRepoRoot(t)
	raw, err := os.ReadFile(filepath.Join(root, name))
	if err != nil {
		t.Fatalf("%s: %v", name, err)
	}
	return string(raw)
}

// serviceBlockText extracts one top-level compose service block's raw YAML text.
func serviceBlockText(t *testing.T, composeYAML, serviceName string) string {
	t.Helper()
	marker := "\n  " + serviceName + ":\n"
	idx := strings.Index(composeYAML, marker)
	if idx < 0 {
		t.Fatalf("service %q not found", serviceName)
	}
	rest := composeYAML[idx+1:]
	next := regexp.MustCompile(`(?m)^  [a-zA-Z0-9_-]+:\s*$`)
	locs := next.FindAllStringIndex(rest, -1)
	if len(locs) >= 2 {
		return rest[:locs[1][0]]
	}
	return rest
}

// E-3: MULTI_INTENT_PLAN_TIER and U9-U12 must be declared (legacy/false) in all
// three environments' app service so operator-set env vars actually reach the
// container. Values must never change from legacy/false in this test.
func TestComposeAppDeclaresMultiIntentPlanTierAndExpansionFlags(t *testing.T) {
	wantKeys := []string{
		"MULTI_INTENT_U9_SEGMENT:",
		"MULTI_INTENT_U10_MUTATE:",
		"MULTI_INTENT_U11_DOCGOV:",
		"MULTI_INTENT_U12_RUN_CONTROL:",
	}
	for _, name := range composeFilesForFlagCheck {
		block := serviceBlockText(t, readComposeFile(t, name), "app")
		if !strings.Contains(block, "MULTI_INTENT_PLAN_TIER: ${MULTI_INTENT_PLAN_TIER:-legacy}") {
			t.Errorf("%s: app service must declare MULTI_INTENT_PLAN_TIER with legacy default", name)
		}
		for _, key := range wantKeys {
			if !strings.Contains(block, key) {
				t.Errorf("%s: app service missing %s declaration", name, key)
			}
		}
	}
}

// A-4: SEMANTIC_SUMMARY_SHADOW / REPLACE(+SESSIONS allowlist) /
// PI_CHANGE_REPORT_NARRATIVE must be declared in all three environments so
// operator-set env vars reach the container (REPLACE is fail-closed gray:
// master + non-empty session allowlist; defaults stay off/empty).
func TestComposeAppDeclaresSemanticSummaryAndNarrativeShadowFlags(t *testing.T) {
	for _, name := range composeFilesForFlagCheck {
		block := serviceBlockText(t, readComposeFile(t, name), "app")
		for _, key := range []string{
			"SEMANTIC_SUMMARY_SHADOW: ${SEMANTIC_SUMMARY_SHADOW:-false}",
			"SEMANTIC_SUMMARY_REPLACE: ${SEMANTIC_SUMMARY_REPLACE:-false}",
			"SEMANTIC_SUMMARY_REPLACE_SESSIONS: ${SEMANTIC_SUMMARY_REPLACE_SESSIONS:-}",
			"PI_CHANGE_REPORT_NARRATIVE: ${PI_CHANGE_REPORT_NARRATIVE:-false}",
		} {
			if !strings.Contains(block, key) {
				t.Errorf("%s: app service missing %s declaration", name, key)
			}
		}
	}
}

func TestComposeAppDeclaresJevDecideFlags(t *testing.T) {
	for _, name := range composeFilesForFlagCheck {
		block := serviceBlockText(t, readComposeFile(t, name), "app")
		if !strings.Contains(block, "JEV_DECIDE_MODE: ${JEV_DECIDE_MODE:-off}") {
			t.Errorf("%s: app service must declare JEV_DECIDE_MODE with off default", name)
		}
		for _, key := range []string{"JEV_BASE_URL:", "JEV_API_KEY:"} {
			if !strings.Contains(block, key) {
				t.Errorf("%s: app service missing %s declaration", name, key)
			}
		}
	}
}


// E-6: main must explicitly disable demo-user seeding at the compose layer
// (defense in depth; internal/auth/bootstrap.go already gates on cfg.Env=="main").
func TestComposeMainSeedDemoUsersExplicitFalse(t *testing.T) {
	block := serviceBlockText(t, readComposeFile(t, "docker-compose.main.yml"), "app")
	if !strings.Contains(block, `SEED_DEMO_USERS: "false"`) {
		t.Fatalf("docker-compose.main.yml: app service must declare SEED_DEMO_USERS: \"false\"")
	}
}

// E-4: CURSOR_RUNNER_URL has zero Go readers repo-wide; neither it nor the
// cursor-agent placeholder service should exist in any environment.
func TestComposeNoDeadCursorRunnerConfig(t *testing.T) {
	for _, name := range composeFilesForFlagCheck {
		text := readComposeFile(t, name)
		if strings.Contains(text, "CURSOR_RUNNER_URL") {
			t.Errorf("%s: dead CURSOR_RUNNER_URL must stay removed (E-4)", name)
		}
		if strings.Contains(text, "\n  cursor-agent:\n") {
			t.Errorf("%s: dead cursor-agent placeholder service must stay removed (E-4)", name)
		}
	}
}

// X-1: SEMANTIC_FALLBACK_ENABLED has zero Go readers repo-wide and no design
// doc describing intended semantics; Wave 5 decision = delete, not re-declare.
func TestComposeNoDeadSemanticFallbackConfig(t *testing.T) {
	for _, name := range composeFilesForFlagCheck {
		if strings.Contains(readComposeFile(t, name), "SEMANTIC_FALLBACK_ENABLED") {
			t.Errorf("%s: dead SEMANTIC_FALLBACK_ENABLED must stay removed (Wave5 X-1)", name)
		}
	}
}