package integrationlog_test

import (
	"context"
	"fmt"
	"strings"
	"sync"
	"testing"

	"gorm.io/gorm"

	"github.com/break/junhong_cmp_fiber/internal/infrastructure/integrationlog"
	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/internal/testutil"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
)

func TestOutboundAttemptPersistsBeforeConditionalCompletion(t *testing.T) {
	db := testutil.NewPostgresTransaction(t)
	createTemporaryIntegrationLogTable(t, db)
	repository := integrationlog.NewRepository(db)

	attempt, err := repository.Start(context.Background(), integrationlog.Attempt{
		IntegrationID: "integration-outbound-1",
		Provider:      "gateway",
		Direction:     constants.IntegrationDirectionOutbound,
		Operation:     "query_card_status",
		ResourceType:  "iot_card",
		ResourceID:    testutil.StringPointer("1001"),
		RequestSummary: map[string]any{
			"iccid":        "8986001234567890123",
			"access_token": "must-not-persist",
			"credential":   "must-not-persist",
			"private_url":  "https://must-not-persist.example",
		},
	})
	if err != nil {
		t.Fatalf("持久化外部尝试失败：%v", err)
	}
	if attempt.Result != constants.IntegrationResultPending {
		t.Fatalf("调用前必须是待处理状态，得到 %q", attempt.Result)
	}
	if strings.Contains(string(attempt.RequestSummary), "must-not-persist") {
		t.Fatalf("请求摘要泄露禁止字段：%s", attempt.RequestSummary)
	}

	auditEventID := uint(77)
	completed, err := repository.Complete(context.Background(), attempt.IntegrationID, integrationlog.Completion{
		Result:          constants.IntegrationResultSuccess,
		HTTPStatus:      200,
		ProviderCode:    "0",
		ProviderMessage: "查询成功",
		StateChanged:    true,
		AuditEventID:    &auditEventID,
		ResponseSummary: map[string]any{"status": "active", "secret": "must-not-persist"},
	})
	if err != nil {
		t.Fatalf("终结外部尝试失败：%v", err)
	}
	if completed.Result != constants.IntegrationResultSuccess || !completed.StateChanged ||
		completed.AuditEventID == nil || *completed.AuditEventID != auditEventID {
		t.Fatalf("外部尝试终态错误：%+v", completed)
	}
	if completed.ProviderMessage == nil || strings.Contains(*completed.ProviderMessage, "查询成功") {
		t.Fatalf("不可信渠道消息必须转换为不可逆摘要：%+v", completed.ProviderMessage)
	}

	if _, err := repository.Complete(context.Background(), attempt.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultFailed,
	}); err == nil {
		t.Fatal("既有终态不得被重复完成改写")
	}
}

func TestIntegrationResultNamesCoverEveryPublicTerminalState(t *testing.T) {
	for _, result := range []string{
		constants.IntegrationResultSuccess, constants.IntegrationResultFailed, constants.IntegrationResultUnknown,
		constants.IntegrationResultNotFound, constants.IntegrationResultInvalidPayload, constants.IntegrationResultIgnored,
		constants.IntegrationResultMerged, constants.IntegrationResultRateLimited, constants.IntegrationResultCompleted,
		constants.IntegrationResultCancelled,
	} {
		if constants.IntegrationResultName(result) == "" {
			t.Fatalf("公开终态 %q 缺少中文名称", result)
		}
	}
}

func TestInboundAttemptIsIdempotentAndNeverPersistsRawPayload(t *testing.T) {
	db := testutil.NewPostgresTransaction(t)
	createTemporaryIntegrationLogTable(t, db)
	repository := integrationlog.NewRepository(db)

	input := integrationlog.InboundAttempt{
		IntegrationID:  "integration-inbound-1",
		IdempotencyKey: "wechat:callback:transaction-1",
		Provider:       "wechat",
		Operation:      "payment_callback",
		ExternalID:     "transaction-1",
		RawPayload:     []byte(`{"sign":"raw-signature","ciphertext":"raw-ciphertext"}`),
		ContentType:    "application/json",
	}
	first, created, err := repository.RecordInbound(context.Background(), input)
	if err != nil || !created {
		t.Fatalf("首次保存入站尝试失败：created=%v err=%v", created, err)
	}
	second, created, err := repository.RecordInbound(context.Background(), input)
	if err != nil || created {
		t.Fatalf("重复入站尝试应返回既有事实：created=%v err=%v", created, err)
	}
	if first.ID != second.ID || first.ContentHash == "" {
		t.Fatalf("重复回调未复用稳定事实或缺少内容哈希：first=%+v second=%+v", first, second)
	}
	serialized := string(first.RequestSummary)
	if strings.Contains(serialized, "raw-signature") || strings.Contains(serialized, "raw-ciphertext") {
		t.Fatalf("入站摘要泄露原始载荷：%s", serialized)
	}
	conflict := input
	conflict.IntegrationID = "integration-inbound-conflict"
	conflict.RawPayload = []byte(`{"different":true}`)
	if _, _, err := repository.RecordInbound(context.Background(), conflict); err == nil {
		t.Fatal("相同入站幂等标识对应不同载荷时必须拒绝")
	}
}

func TestUnknownResultRequiresExplicitRecoveryAndUnsentAttemptIsTerminal(t *testing.T) {
	db := testutil.NewPostgresTransaction(t)
	createTemporaryIntegrationLogTable(t, db)
	repository := integrationlog.NewRepository(db)

	pending, err := repository.Start(context.Background(), integrationlog.Attempt{
		IntegrationID: "integration-unknown-1", Provider: "wecom",
		Direction: constants.IntegrationDirectionOutbound, Operation: "submit_approval",
	})
	if err != nil {
		t.Fatalf("准备结果未知尝试失败：%v", err)
	}
	if _, err := repository.Complete(context.Background(), pending.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultUnknown,
	}); err == nil {
		t.Fatal("结果未知必须记录明确恢复策略")
	}
	unknown, err := repository.Complete(context.Background(), pending.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultUnknown, RecoveryStrategy: "按原外部单号查询结果，禁止盲目重发",
	})
	if err != nil || unknown.RecoveryStrategy == nil {
		t.Fatalf("保存结果未知及恢复策略失败：log=%+v err=%v", unknown, err)
	}

	for index, terminal := range []string{
		constants.IntegrationResultIgnored, constants.IntegrationResultMerged, constants.IntegrationResultRateLimited,
		constants.IntegrationResultCompleted, constants.IntegrationResultCancelled,
	} {
		unsent, err := repository.Start(context.Background(), integrationlog.Attempt{
			IntegrationID: fmt.Sprintf("integration-unsent-%d", index), Provider: "gateway",
			Direction: constants.IntegrationDirectionOutbound, Operation: "query_card_status", InitialResult: terminal,
		})
		if err != nil || unsent.Result != terminal || unsent.HTTPStatus != nil {
			t.Fatalf("未发送终态不得伪造 HTTP 结果：log=%+v err=%v", unsent, err)
		}
		if _, err := repository.Complete(context.Background(), unsent.IntegrationID, integrationlog.Completion{
			Result: constants.IntegrationResultSuccess,
		}); err == nil {
			t.Fatal("未发送终态不得被后续完成改写")
		}
	}
	if _, err := repository.Start(context.Background(), integrationlog.Attempt{
		Provider: "gateway", Direction: constants.IntegrationDirectionOutbound,
		Operation: "query_card_status", InitialResult: constants.IntegrationResultSuccess,
	}); err == nil {
		t.Fatal("实际调用结果不得绕过 pending 直接写终态")
	}
}

func TestExplicitFailureAndConcurrentCompletionKeepFirstTerminalFact(t *testing.T) {
	db := testutil.NewPostgresDatabase(t)
	integrationIDs := []string{"integration-failed-1", "integration-concurrent-1"}
	t.Cleanup(func() {
		if err := db.Where("integration_id IN ?", integrationIDs).Delete(&model.IntegrationLog{}).Error; err != nil {
			t.Errorf("清理 Integration Log 并发测试数据失败：%v", err)
		}
	})
	if err := db.Where("integration_id IN ?", integrationIDs).Delete(&model.IntegrationLog{}).Error; err != nil {
		t.Fatalf("准备 Integration Log 并发测试隔离数据失败：%v", err)
	}
	repository := integrationlog.NewRepository(db)
	failedAttempt, err := repository.Start(context.Background(), integrationlog.Attempt{
		IntegrationID: "integration-failed-1", Provider: "gateway",
		Direction: constants.IntegrationDirectionOutbound, Operation: "query_card_status",
	})
	if err != nil {
		t.Fatalf("准备明确失败尝试失败：%v", err)
	}
	failed, err := repository.Complete(context.Background(), failedAttempt.IntegrationID, integrationlog.Completion{
		Result: constants.IntegrationResultFailed, ProviderCode: "UPSTREAM_REJECTED", ProviderMessage: "上游明确拒绝",
	})
	if err != nil || failed.Result != constants.IntegrationResultFailed {
		t.Fatalf("明确失败未保存为失败终态：log=%+v err=%v", failed, err)
	}

	attempt, err := repository.Start(context.Background(), integrationlog.Attempt{
		IntegrationID: "integration-concurrent-1", Provider: "gateway",
		Direction: constants.IntegrationDirectionOutbound, Operation: "query_card_status",
	})
	if err != nil {
		t.Fatalf("准备并发终结尝试失败：%v", err)
	}

	results := make(chan error, 2)
	var group sync.WaitGroup
	for _, terminal := range []string{constants.IntegrationResultSuccess, constants.IntegrationResultFailed} {
		group.Add(1)
		go func(result string) {
			defer group.Done()
			_, completeErr := repository.Complete(context.Background(), attempt.IntegrationID, integrationlog.Completion{Result: result})
			results <- completeErr
		}(terminal)
	}
	group.Wait()
	close(results)
	successes := 0
	for completeErr := range results {
		if completeErr == nil {
			successes++
		}
	}
	if successes != 1 {
		t.Fatalf("并发终结必须且只能一个成功，实际成功 %d 次", successes)
	}
	var saved model.IntegrationLog
	if err := db.Where("integration_id = ?", attempt.IntegrationID).First(&saved).Error; err != nil {
		t.Fatalf("读取并发终态失败：%v", err)
	}
	if saved.Result != constants.IntegrationResultSuccess && saved.Result != constants.IntegrationResultFailed {
		t.Fatalf("并发终结未保存明确成功或失败：%+v", saved)
	}
}

func createTemporaryIntegrationLogTable(t *testing.T, db *gorm.DB) {
	t.Helper()
	if err := db.Exec(`CREATE TEMP TABLE tb_integration_log (
		id bigserial PRIMARY KEY,
		integration_id varchar(64) NOT NULL UNIQUE,
		idempotency_key varchar(160),
		provider varchar(32) NOT NULL,
		direction varchar(16) NOT NULL,
		operation varchar(64) NOT NULL,
		external_id varchar(128),
		resource_type varchar(64),
		resource_id varchar(128),
		resource_key varchar(128),
		trigger_source varchar(32),
		trigger_scene varchar(128),
		trigger_series varchar(64),
		scheduled_at timestamptz,
		started_at timestamptz,
		attempt integer NOT NULL DEFAULT 1,
		result varchar(20) NOT NULL,
		http_status integer,
		provider_code varchar(64),
		provider_message varchar(500),
		request_summary jsonb,
		response_summary jsonb,
		content_hash varchar(64),
		duration_ms bigint NOT NULL DEFAULT 0,
		state_changed boolean NOT NULL DEFAULT false,
		metadata jsonb,
		recovery_strategy varchar(255),
		request_id varchar(64),
		correlation_id varchar(64),
		audit_event_id bigint,
		created_at timestamptz NOT NULL DEFAULT NOW(),
		updated_at timestamptz NOT NULL DEFAULT NOW(),
		CONSTRAINT uq_test_integration_idempotency UNIQUE (provider, operation, idempotency_key)
	) ON COMMIT DROP`).Error; err != nil {
		t.Fatalf("创建 Integration Log 测试表失败：%v", err)
	}
}