package persistence

import (
	"context"
	"database/sql"
	"testing"
	"time"

	_ "github.com/mattn/go-sqlite3"

	"go.yandata.net/iod/iod/go-trustlog/api/logger"
	"go.yandata.net/iod/iod/go-trustlog/api/model"
)

// setupTestDB 创建测试用的 SQLite 内存数据库
func setupTestDB(t *testing.T) *sql.DB {
	db, err := sql.Open("sqlite3", ":memory:")
	if err != nil {
		t.Fatalf("failed to open test database: %v", err)
	}

	// 创建表
	opDDL, cursorDDL, retryDDL, err := GetDialectDDL("sqlite3")
	if err != nil {
		t.Fatalf("failed to get DDL: %v", err)
	}

	if _, err := db.Exec(opDDL); err != nil {
		t.Fatalf("failed to create operation table: %v", err)
	}

	if _, err := db.Exec(cursorDDL); err != nil {
		t.Fatalf("failed to create cursor table: %v", err)
	}

	if _, err := db.Exec(retryDDL); err != nil {
		t.Fatalf("failed to create retry table: %v", err)
	}

	return db
}

// createTestOperation 创建测试用的 Operation
func createTestOperation(t *testing.T, opID string) *model.Operation {
	op, err := model.NewFullOperation(
		model.OpSourceDOIP,
		model.OpTypeCreate,
		"10.1000",
		"test-repo",
		"10.1000/test-repo/"+opID,
		"producer-001",
		"test-actor",
		[]byte(`{"test":"request"}`),
		[]byte(`{"test":"response"}`),
		time.Now(),
	)
	if err != nil {
		t.Fatalf("failed to create test operation: %v", err)
	}

	op.OpID = opID // 覆盖自动生成的 ID
	return op
}

func TestOperationRepository_Save(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewOperationRepository(db, log)

	op := createTestOperation(t, "test-op-001")

	// 设置 IP 字段
	clientIP := "192.168.1.100"
	serverIP := "10.0.0.50"
	op.ClientIP = &clientIP
	op.ServerIP = &serverIP

	// 测试保存
	err := repo.Save(ctx, op, StatusNotTrustlogged)
	if err != nil {
		t.Fatalf("failed to save operation: %v", err)
	}

	// 验证保存结果
	savedOp, status, err := repo.FindByID(ctx, "test-op-001")
	if err != nil {
		t.Fatalf("failed to find operation: %v", err)
	}

	if savedOp.OpID != "test-op-001" {
		t.Errorf("expected OpID to be 'test-op-001', got %s", savedOp.OpID)
	}

	if status != StatusNotTrustlogged {
		t.Errorf("expected status to be StatusNotTrustlogged, got %v", status)
	}

	if savedOp.ClientIP == nil || *savedOp.ClientIP != "192.168.1.100" {
		t.Error("ClientIP not saved correctly")
	}

	if savedOp.ServerIP == nil || *savedOp.ServerIP != "10.0.0.50" {
		t.Error("ServerIP not saved correctly")
	}
}

func TestOperationRepository_SaveWithNullIP(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewOperationRepository(db, log)

	op := createTestOperation(t, "test-op-002")
	// IP 字段保持为 nil

	err := repo.Save(ctx, op, StatusNotTrustlogged)
	if err != nil {
		t.Fatalf("failed to save operation: %v", err)
	}

	savedOp, _, err := repo.FindByID(ctx, "test-op-002")
	if err != nil {
		t.Fatalf("failed to find operation: %v", err)
	}

	if savedOp.ClientIP != nil {
		t.Error("ClientIP should be nil")
	}

	if savedOp.ServerIP != nil {
		t.Error("ServerIP should be nil")
	}
}

func TestOperationRepository_UpdateStatus(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewOperationRepository(db, log)

	op := createTestOperation(t, "test-op-003")

	// 先保存
	err := repo.Save(ctx, op, StatusNotTrustlogged)
	if err != nil {
		t.Fatalf("failed to save operation: %v", err)
	}

	// 更新状态
	err = repo.UpdateStatus(ctx, "test-op-003", StatusTrustlogged)
	if err != nil {
		t.Fatalf("failed to update status: %v", err)
	}

	// 验证更新结果
	_, status, err := repo.FindByID(ctx, "test-op-003")
	if err != nil {
		t.Fatalf("failed to find operation: %v", err)
	}

	if status != StatusTrustlogged {
		t.Errorf("expected status to be StatusTrustlogged, got %v", status)
	}
}

func TestOperationRepository_FindUntrustlogged(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewOperationRepository(db, log)

	// 保存多个操作
	for i := 1; i <= 5; i++ {
		op := createTestOperation(t, "test-op-00"+string(rune('0'+i)))
		status := StatusNotTrustlogged
		if i%2 == 0 {
			status = StatusTrustlogged
		}
		err := repo.Save(ctx, op, status)
		if err != nil {
			t.Fatalf("failed to save operation %d: %v", i, err)
		}
	}

	// 查询未存证的操作
	ops, err := repo.FindUntrustlogged(ctx, 10)
	if err != nil {
		t.Fatalf("failed to find untrustlogged operations: %v", err)
	}

	// 应该有 3 个未存证的操作（1, 3, 5）
	if len(ops) != 3 {
		t.Errorf("expected 3 untrustlogged operations, got %d", len(ops))
	}
}

func TestCursorRepository_GetAndUpdate(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewCursorRepository(db, log)

	cursorKey := "test-cursor"
	
	// 初始化游标
	now := time.Now().Format(time.RFC3339Nano)
	err := repo.InitCursor(ctx, cursorKey, now)
	if err != nil {
		t.Fatalf("failed to init cursor: %v", err)
	}

	// 获取游标值
	cursorValue, err := repo.GetCursor(ctx, cursorKey)
	if err != nil {
		t.Fatalf("failed to get cursor: %v", err)
	}

	if cursorValue != now {
		t.Errorf("expected cursor value to be %s, got %s", now, cursorValue)
	}

	// 更新游标
	newTime := time.Now().Add(1 * time.Hour).Format(time.RFC3339Nano)
	err = repo.UpdateCursor(ctx, cursorKey, newTime)
	if err != nil {
		t.Fatalf("failed to update cursor: %v", err)
	}

	// 验证更新结果
	cursorValue, err = repo.GetCursor(ctx, cursorKey)
	if err != nil {
		t.Fatalf("failed to get cursor: %v", err)
	}

	if cursorValue != newTime {
		t.Errorf("expected cursor value to be %s, got %s", newTime, cursorValue)
	}
}

func TestRetryRepository_AddAndFind(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewRetryRepository(db, log)

	// 添加重试记录（立即可以重试）
	nextRetry := time.Now().Add(-1 * time.Second) // 过去的时间，立即可以查询到
	err := repo.AddRetry(ctx, "test-op-001", "test error", nextRetry)
	if err != nil {
		t.Fatalf("failed to add retry: %v", err)
	}

	// 查找待重试的记录
	records, err := repo.FindPendingRetries(ctx, 10)
	if err != nil {
		t.Fatalf("failed to find pending retries: %v", err)
	}

	if len(records) != 1 {
		t.Errorf("expected 1 retry record, got %d", len(records))
	}

	if len(records) > 0 {
		if records[0].OpID != "test-op-001" {
			t.Errorf("expected OpID to be 'test-op-001', got %s", records[0].OpID)
		}

		if records[0].RetryStatus != RetryStatusPending {
			t.Errorf("expected status to be PENDING, got %v", records[0].RetryStatus)
		}
	}
}

func TestRetryRepository_IncrementRetry(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewRetryRepository(db, log)

	// 添加重试记录
	nextRetry := time.Now().Add(-1 * time.Second)
	err := repo.AddRetry(ctx, "test-op-001", "test error", nextRetry)
	if err != nil {
		t.Fatalf("failed to add retry: %v", err)
	}

	// 增加重试次数（立即可以重试）
	nextRetry2 := time.Now().Add(-1 * time.Second)
	err = repo.IncrementRetry(ctx, "test-op-001", "test error 2", nextRetry2)
	if err != nil {
		t.Fatalf("failed to increment retry: %v", err)
	}

	// 验证重试次数
	records, err := repo.FindPendingRetries(ctx, 10)
	if err != nil {
		t.Fatalf("failed to find pending retries: %v", err)
	}

	if len(records) != 1 {
		t.Fatalf("expected 1 retry record, got %d", len(records))
	}

	if records[0].RetryCount != 1 {
		t.Errorf("expected RetryCount to be 1, got %d", records[0].RetryCount)
	}

	if records[0].RetryStatus != RetryStatusRetrying {
		t.Errorf("expected status to be RETRYING, got %v", records[0].RetryStatus)
	}
}

func TestRetryRepository_MarkAsDeadLetter(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewRetryRepository(db, log)

	// 添加重试记录
	nextRetry := time.Now().Add(-1 * time.Second)
	err := repo.AddRetry(ctx, "test-op-001", "test error", nextRetry)
	if err != nil {
		t.Fatalf("failed to add retry: %v", err)
	}

	// 标记为死信
	err = repo.MarkAsDeadLetter(ctx, "test-op-001", "max retries exceeded")
	if err != nil {
		t.Fatalf("failed to mark as dead letter: %v", err)
	}

	// 验证状态（死信不应该在待重试列表中）
	records, err := repo.FindPendingRetries(ctx, 10)
	if err != nil {
		t.Fatalf("failed to find pending retries: %v", err)
	}

	if len(records) != 0 {
		t.Errorf("expected 0 pending retry records, got %d", len(records))
	}
}

func TestRetryRepository_DeleteRetry(t *testing.T) {
	db := setupTestDB(t)
	defer db.Close()

	ctx := context.Background()
	log := logger.GetGlobalLogger()
	repo := NewRetryRepository(db, log)

	// 添加重试记录
	nextRetry := time.Now().Add(-1 * time.Second)
	err := repo.AddRetry(ctx, "test-op-001", "test error", nextRetry)
	if err != nil {
		t.Fatalf("failed to add retry: %v", err)
	}

	// 删除重试记录
	err = repo.DeleteRetry(ctx, "test-op-001")
	if err != nil {
		t.Fatalf("failed to delete retry: %v", err)
	}

	// 验证已删除
	records, err := repo.FindPendingRetries(ctx, 10)
	if err != nil {
		t.Fatalf("failed to find pending retries: %v", err)
	}

	if len(records) != 0 {
		t.Errorf("expected 0 retry records, got %d", len(records))
	}
}