package allocate

import (
	"context"
	"errors"
	"strings"
	"testing"
	"time"

	"github.com/gogf/gf/v2/encoding/gjson"
	"github.com/gogf/gf/v2/os/gtime"

	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/consts"
	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/model/entity"
)

func TestAllocateProcessingRetryAfterHasLargeBatchDefault(t *testing.T) {
	if got := allocateProcessingRetryAfter(context.Background()); got < 30*time.Minute {
		t.Fatalf("allocateProcessingRetryAfter() = %s, want at least 30m", got)
	}
}

func TestIsAllocateParentRequiresTypeAndRole(t *testing.T) {
	parent := &entity.BatchMain{
		BatchType: consts.BatchTypeAllocate,
		BatchInfo: gjson.New(`{"jobRole":"allocate_parent"}`),
	}
	if !isAllocateParent(parent) {
		t.Fatal("expected allocate parent metadata to be recognized")
	}
	parent.SourceBatchNo = "ALC-CHILD"
	if isAllocateParent(parent) {
		t.Fatal("child batch must not be recognized as allocate parent")
	}
}

func TestIsAllocateDeadlock(t *testing.T) {
	if !isAllocateDeadlock(errors.New("Error 1213 (40001): Deadlock found when trying to get lock")) {
		t.Fatal("expected MySQL deadlock to be retryable")
	}
	if isAllocateDeadlock(errors.New("validation failed")) {
		t.Fatal("validation errors must not be treated as deadlocks")
	}
}

func TestResolveAllocateParentStartTime(t *testing.T) {
	parentStart := gtime.New("2026-09-29 12:59:00")
	childStart := gtime.New("2026-09-29 12:59:32")
	fallback := gtime.New("2026-09-29 13:00:21")

	if got := resolveAllocateParentStartTime(parentStart, childStart, fallback); got != parentStart {
		t.Fatalf("parent start time = %v, want existing parent time %v", got, parentStart)
	}
	if got := resolveAllocateParentStartTime(nil, childStart, fallback); got != childStart {
		t.Fatalf("parent start time = %v, want earliest child time %v", got, childStart)
	}
	if got := resolveAllocateParentStartTime(nil, nil, fallback); got != fallback {
		t.Fatalf("parent start time = %v, want fallback time %v", got, fallback)
	}
}

func TestAllocateBatchSizesRemainBounded(t *testing.T) {
	if allocateCardQueryBatchSize <= 0 || allocateCardQueryBatchSize > 1000 {
		t.Fatalf("allocateCardQueryBatchSize = %d", allocateCardQueryBatchSize)
	}
	if allocateCardUpdateBatchSize <= 0 || allocateCardUpdateBatchSize > 1000 {
		t.Fatalf("allocateCardUpdateBatchSize = %d", allocateCardUpdateBatchSize)
	}
	if allocateDetailUpdateBatchSize <= 0 || allocateDetailUpdateBatchSize > 1000 {
		t.Fatalf("allocateDetailUpdateBatchSize = %d", allocateDetailUpdateBatchSize)
	}
}

func TestBuildDetailUpdateStatementUsesBoundParameters(t *testing.T) {
	task := &Task{Batch: Batch{BatchNo: "ALC-1", CreatedBy: 7}}
	details := []*Detail{
		{ID: 11, DetailStatus: consts.BatchDetailStatusPending, Reason: "unsafe ' reason"},
		{ID: 12, DetailStatus: consts.BatchDetailStatusRunning, Reason: "second"},
	}
	statement, args := buildDetailUpdateStatement(task, details, gtime.Now())
	if strings.Contains(statement, details[0].Reason) {
		t.Fatal("detail reason was interpolated into SQL")
	}
	if !strings.Contains(statement, "CASE") || !strings.Contains(statement, "IN (?,?)") {
		t.Fatalf("unexpected statement: %s", statement)
	}
	if len(args) != len(details)*7+9 {
		t.Fatalf("argument count = %d, want %d", len(args), len(details)*7+9)
	}
}

func TestNormalizeAtomicParentResultRejectsPartialSuccess(t *testing.T) {
	task := &Task{Details: []*Detail{
		{ICCID: "8986000000000000001"},
		{ICCID: "8986000000000000002", Reason: "目标客户不存在"},
	}}

	successCount, failCount := normalizeAtomicParentResult(task)
	if successCount != 0 || failCount != len(task.Details) {
		t.Fatalf("normalizeAtomicParentResult() = %d, %d; want 0, %d", successCount, failCount, len(task.Details))
	}
	for _, detail := range task.Details {
		if detail.Success() {
			t.Fatalf("detail %s remained successful", detail.ICCID)
		}
	}
	status, result, _ := parentBatchResult(successCount, failCount)
	if status != consts.BatchAsyncStatusFailed || result != consts.BatchRunResultFailed {
		t.Fatalf("parentBatchResult() = %d, %d; want failed, failed", status, result)
	}
}

func TestValidateDetailAllowsCurrentHolderReallocation(t *testing.T) {
	task := &Task{
		Batch: Batch{
			CreatedDept: 100,
		},
		TargetsByID: map[int64]*Target{
			200: {DeptID: 200, ParentID: 100},
		},
	}
	detail := &Detail{
		ICCID:        "8986000000000000000",
		TargetDeptID: 200,
		Card: &Card{
			ICCID:             "8986000000000000000",
			DeptID:            100,
			AllocationBatchNo: "ALC202608050001",
			PackageStatus:     consts.PackageStatusEffective,
		},
	}

	validateDetail(task, detail)
	if detail.Reason != "" {
		t.Fatalf("expected current holder reallocation to pass, got %q", detail.Reason)
	}
}

func TestValidateDetailRejectsAncestorReallocationAfterCardMoved(t *testing.T) {
	task := &Task{
		Batch: Batch{
			CreatedDept: 100,
		},
		TargetsByID: map[int64]*Target{
			300: {DeptID: 300, ParentID: 100},
		},
	}
	detail := &Detail{
		ICCID:        "8986000000000000000",
		TargetDeptID: 300,
		Card: &Card{
			ICCID:             "8986000000000000000",
			DeptID:            200,
			AllocationBatchNo: "ALC202608050001",
			PackageStatus:     consts.PackageStatusEffective,
		},
	}

	validateDetail(task, detail)
	if detail.Reason == "" {
		t.Fatal("expected ancestor reallocation to be rejected after card moved")
	}
}

func TestValidateTaskMarksWholeBatchFailed(t *testing.T) {
	task := &Task{
		Details: []*Detail{
			{ICCID: "8986000000000000001"},
			{ICCID: "8986000000000000002", Reason: "目标客户不存在"},
		},
	}

	validateTask(task)

	for _, detail := range task.Details {
		if detail.Success() {
			t.Fatalf("detail %s remained successful after atomic failure", detail.ICCID)
		}
	}
	if task.FailureReason == "" {
		t.Fatal("expected batch failure reason")
	}
	status, result := batchResult(countResult(task))
	if status != consts.BatchAsyncStatusFailed || result != consts.BatchRunResultFailed {
		t.Fatalf("batchResult() = %d, %d; want failed, failed", status, result)
	}
}

func TestValidateDetailRejectsChangedCardICCID(t *testing.T) {
	task := &Task{Batch: Batch{CreatedDept: 100}, TargetsByID: map[int64]*Target{200: {DeptID: 200, ParentID: 100}}}
	detail := &Detail{ICCID: "8986000000000000001", TargetDeptID: 200, Card: &Card{ICCID: "8986000000000000002", DeptID: 100, PackageStatus: consts.PackageStatusEffective}}

	validateDetail(task, detail)
	if detail.Reason == "" {
		t.Fatal("expected changed card ICCID to be rejected")
	}
}