package gormx_test

import (
	"bytes"
	"context"
	"errors"
	"net"
	"os"
	"strconv"
	"strings"
	"testing"
	"time"

	"git.yuntuo.hk/k2safe/go-omni/database/gormx"
	adapter "git.yuntuo.hk/k2safe/go-omni/database/mysql"
	"git.yuntuo.hk/k2safe/go-omni/logx"
	"gorm.io/gorm"
)

type record struct {
	ID   int64 `gorm:"primaryKey;autoIncrement:false"`
	Name string
}

func (record) TableName() string { return "gorm_adapter_records" }

func TestGORMMySQLTransactionsCancellationAndLogs(t *testing.T) {
	if os.Getenv("GO_OMNI_CONNECTOR_MYSQL_TEST") != "1" {
		t.Skip("use scripts/verifyConnector.py --gorm with isolated MySQL")
	}
	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()
	cfg := adapter.DefaultConfig()
	host, port, err := net.SplitHostPort(os.Getenv("GO_OMNI_CONNECTOR_ADDR"))
	if err != nil {
		t.Fatal(err)
	}
	cfg.Host = host
	cfg.Port, _ = strconv.Atoi(port)
	cfg.User = os.Getenv("GO_OMNI_CONNECTOR_USER")
	cfg.Password = os.Getenv("GO_OMNI_CONNECTOR_PASSWORD")
	cfg.Database = os.Getenv("GO_OMNI_CONNECTOR_DATABASE")
	cfg.TLS.CAFile = os.Getenv("GO_OMNI_CONNECTOR_CA_FILE")
	cfg.TLS.ServerName = "localhost"
	cfg.Pool.MaxOpenConns = 2
	cfg.Pool.MaxIdleConns = 2
	pool, err := adapter.Open(ctx, cfg)
	if err != nil {
		t.Fatal(err)
	}
	defer pool.Close()
	var logs bytes.Buffer
	logger, err := logx.New(logx.Config{Writer: &logs})
	if err != nil {
		t.Fatal(err)
	}
	defer logger.Close()
	logConfig := gormx.DefaultLogConfig()
	logConfig.Level = "info"
	orm, err := gormx.MySQL(ctx, pool, gormx.WithLogger(logger), gormx.WithLogConfig(logConfig), gormx.WithConfig(gorm.Config{PrepareStmt: true, TranslateError: true}))
	if err != nil {
		t.Fatal(err)
	}
	sqlDB, err := orm.DB()
	if err != nil || sqlDB != pool.DB {
		t.Fatal("pool not shared", err)
	}
	if sqlDB.Stats().MaxOpenConnections != 2 {
		t.Fatal("pool limits changed")
	}
	var tables int
	if err = pool.QueryRowContext(ctx, "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = DATABASE() AND table_name = 'gorm_adapter_records'").Scan(&tables); err != nil || tables != 0 {
		t.Fatal("adapter must not migrate schema", err)
	}
	if _, err = pool.ExecContext(ctx, "CREATE TABLE gorm_adapter_records (id BIGINT PRIMARY KEY, name VARCHAR(100) UNIQUE NOT NULL)"); err != nil {
		t.Fatal(err)
	}
	defer pool.ExecContext(context.Background(), "DROP TABLE gorm_adapter_records")
	requestCtx := logx.WithRequestID(ctx, "gorm-request")
	orm = orm.WithContext(requestCtx)
	secret := "private-bound-name"
	if err = orm.Transaction(func(tx *gorm.DB) error { return tx.Create(&record{ID: 1, Name: secret}).Error }); err != nil {
		t.Fatal(err)
	}
	wanted := errors.New("rollback sentinel")
	if err = orm.Transaction(func(tx *gorm.DB) error {
		if e := tx.Create(&record{ID: 2, Name: "rollback"}).Error; e != nil {
			return e
		}
		return wanted
	}); !errors.Is(err, wanted) {
		t.Fatal(err)
	}
	func() {
		defer func() {
			if recover() != "rollback panic" {
				t.Error("panic changed")
			}
		}()
		_ = orm.Transaction(func(tx *gorm.DB) error {
			if e := tx.Create(&record{ID: 3, Name: "panic"}).Error; e != nil {
				t.Fatal(e)
			}
			panic("rollback panic")
		})
	}()
	var count int64
	if err = orm.Model(&record{}).Count(&count).Error; err != nil || count != 1 {
		t.Fatal("commit/rollback differs", count, err)
	}
	if err = orm.Transaction(func(tx *gorm.DB) error {
		if e := tx.Create(&record{ID: 4, Name: "outer"}).Error; e != nil {
			return e
		}
		if e := tx.Transaction(func(inner *gorm.DB) error {
			if e := inner.Create(&record{ID: 5, Name: "inner"}).Error; e != nil {
				return e
			}
			return wanted
		}); !errors.Is(e, wanted) {
			return errors.New("nested rollback failed")
		}
		return nil
	}); err != nil {
		t.Fatal(err)
	}
	if err = orm.Model(&record{}).Count(&count).Error; err != nil || count != 2 {
		t.Fatal(count, err)
	}
	if err = orm.Create(&record{ID: 6, Name: secret}).Error; !errors.Is(err, gorm.ErrDuplicatedKey) {
		t.Fatal("native error translation lost", err)
	}
	var missing record
	if err = orm.First(&missing, "id = ?", 999).Error; !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Fatal("not-found semantics changed", err)
	}
	deadline, stop := context.WithTimeout(requestCtx, 30*time.Millisecond)
	start := time.Now()
	err = orm.WithContext(deadline).Exec("SELECT SLEEP(3)").Error
	stop()
	if !errors.Is(err, context.DeadlineExceeded) || time.Since(start) > time.Second {
		t.Fatal("query cancellation lost", err)
	}
	if err = pool.Health(ctx); err != nil {
		t.Fatal("pool did not recover", err)
	}
	if strings.Contains(logs.String(), secret) || !strings.Contains(logs.String(), `"requestId":"gorm-request"`) || !strings.Contains(logs.String(), "gorm.queryFailed") {
		t.Fatal("SQL log privacy/correlation differs")
	}
	var cipher struct {
		VariableName string
		Value        string
	}
	if err = orm.Raw("SHOW SESSION STATUS LIKE 'Ssl_cipher'").Scan(&cipher).Error; err != nil || cipher.Value == "" {
		t.Fatal("GORM bypassed TLS pool", err)
	}
}