package main

import (
	"database/sql"
	"database/sql/driver"
	"errors"
	"github.com/erikstmartin/go-testdb"
	"testing"
)

type testResult struct {
	lastID       int64
	affectedRows int64
}

func (r testResult) LastInsertId() (int64, error) {
	return r.lastID, nil
}

func (r testResult) RowsAffected() (int64, error) {
	return r.affectedRows, nil
}

func TestDBInit(t *testing.T) {
	fakeDB := new(acmedb)
	err := fakeDB.Init("notarealegine", "connectionstring")
	if err == nil {
		t.Errorf("Was expecting error, didn't get one.")
	}

	testdb.SetExecWithArgsFunc(func(query string, args []driver.Value) (result driver.Result, err error) {
		return testResult{1, 0}, errors.New("Prepared query error")
	})
	defer testdb.Reset()

	errorDB := new(acmedb)
	err = errorDB.Init("testdb", "")
	if err == nil {
		t.Errorf("Was expecting DB initiation error but got none")
	}
	errorDB.Close()
}

func TestRegister(t *testing.T) {
	// Register tests
	_, err := DB.Register()
	if err != nil {
		t.Errorf("Registration failed, got error [%v]", err)
	}
}

func TestGetByUsername(t *testing.T) {
	// Create  reg to refer to
	reg, err := DB.Register()
	if err != nil {
		t.Errorf("Registration failed, got error [%v]", err)
	}

	regUser, err := DB.GetByUsername(reg.Username)
	if err != nil {
		t.Errorf("Could not get test user, got error [%v]", err)
	}

	if reg.Username != regUser.Username {
		t.Errorf("GetByUsername username [%q] did not match the original [%q]", regUser.Username, reg.Username)
	}

	if reg.Subdomain != regUser.Subdomain {
		t.Errorf("GetByUsername subdomain [%q] did not match the original [%q]", regUser.Subdomain, reg.Subdomain)
	}

	// regUser password already is a bcrypt hash
	if !correctPassword(reg.Password, regUser.Password) {
		t.Errorf("The password [%s] does not match the hash [%s]", reg.Password, regUser.Password)
	}
}

func TestPrepareErrors(t *testing.T) {
	reg, _ := DB.Register()
	tdb, err := sql.Open("testdb", "")
	if err != nil {
		t.Errorf("Got error: %v", err)
	}
	oldDb := DB.GetBackend()
	DB.SetBackend(tdb)
	defer DB.SetBackend(oldDb)
	defer testdb.Reset()

	_, err = DB.GetByUsername(reg.Username)
	if err == nil {
		t.Errorf("Expected error, but didn't get one")
	}

	_, err = DB.GetByDomain(reg.Subdomain)
	if err == nil {
		t.Errorf("Expected error, but didn't get one")
	}
}

func TestQueryExecErrors(t *testing.T) {
	reg, _ := DB.Register()
	testdb.SetExecWithArgsFunc(func(query string, args []driver.Value) (result driver.Result, err error) {
		return testResult{1, 0}, errors.New("Prepared query error")
	})

	testdb.SetQueryWithArgsFunc(func(query string, args []driver.Value) (result driver.Rows, err error) {
		columns := []string{"Username", "Password", "Subdomain", "Value", "LastActive"}
		return testdb.RowsFromSlice(columns, [][]driver.Value{}), errors.New("Prepared query error")
	})

	defer testdb.Reset()

	tdb, err := sql.Open("testdb", "")
	if err != nil {
		t.Errorf("Got error: %v", err)
	}
	oldDb := DB.GetBackend()

	DB.SetBackend(tdb)
	defer DB.SetBackend(oldDb)

	_, err = DB.GetByUsername(reg.Username)
	if err == nil {
		t.Errorf("Expected error from exec, but got none")
	}

	_, err = DB.GetByDomain(reg.Subdomain)
	if err == nil {
		t.Errorf("Expected error from exec in GetByDomain, but got none")
	}

	_, err = DB.Register()
	if err == nil {
		t.Errorf("Expected error from exec in Register, but got none")
	}
	reg.Value = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
	err = DB.Update(reg)
	if err == nil {
		t.Errorf("Expected error from exec in Update, but got none")
	}

}

func TestQueryScanErrors(t *testing.T) {
	reg, _ := DB.Register()

	testdb.SetExecWithArgsFunc(func(query string, args []driver.Value) (result driver.Result, err error) {
		return testResult{1, 0}, errors.New("Prepared query error")
	})

	testdb.SetQueryWithArgsFunc(func(query string, args []driver.Value) (result driver.Rows, err error) {
		columns := []string{"Only one"}
		resultrows := "this value"
		return testdb.RowsFromCSVString(columns, resultrows), nil
	})

	defer testdb.Reset()
	tdb, err := sql.Open("testdb", "")
	if err != nil {
		t.Errorf("Got error: %v", err)
	}
	oldDb := DB.GetBackend()

	DB.SetBackend(tdb)
	defer DB.SetBackend(oldDb)

	_, err = DB.GetByUsername(reg.Username)
	if err == nil {
		t.Errorf("Expected error from scan in, but got none")
	}

	_, err = DB.GetByDomain(reg.Subdomain)
	if err == nil {
		t.Errorf("Expected error from scan in GetByDomain, but got none")
	}
}

func TestBadDBValues(t *testing.T) {
	reg, _ := DB.Register()

	testdb.SetQueryWithArgsFunc(func(query string, args []driver.Value) (result driver.Rows, err error) {
		columns := []string{"Username", "Password", "Subdomain", "Value", "LastActive"}
		resultrows := "invalid,invalid,invalid,invalid,"
		return testdb.RowsFromCSVString(columns, resultrows), nil
	})

	defer testdb.Reset()
	tdb, err := sql.Open("testdb", "")
	if err != nil {
		t.Errorf("Got error: %v", err)
	}
	oldDb := DB.GetBackend()

	DB.SetBackend(tdb)
	defer DB.SetBackend(oldDb)

	_, err = DB.GetByUsername(reg.Username)
	if err == nil {
		t.Errorf("Expected error from scan in, but got none")
	}

	_, err = DB.GetByDomain(reg.Subdomain)
	if err == nil {
		t.Errorf("Expected error from scan in GetByDomain, but got none")
	}
}

func TestGetByDomain(t *testing.T) {
	var regDomain = ACMETxt{}

	// Create  reg to refer to
	reg, err := DB.Register()
	if err != nil {
		t.Errorf("Registration failed, got error [%v]", err)
	}

	regDomainSlice, err := DB.GetByDomain(reg.Subdomain)
	if err != nil {
		t.Errorf("Could not get test user, got error [%v]", err)
	}
	if len(regDomainSlice) == 0 {
		t.Errorf("No rows returned for GetByDomain [%s]", reg.Subdomain)
	} else {
		regDomain = regDomainSlice[0]
	}

	if reg.Username != regDomain.Username {
		t.Errorf("GetByUsername username [%q] did not match the original [%q]", regDomain.Username, reg.Username)
	}

	if reg.Subdomain != regDomain.Subdomain {
		t.Errorf("GetByUsername subdomain [%q] did not match the original [%q]", regDomain.Subdomain, reg.Subdomain)
	}

	// regDomain password already is a bcrypt hash
	if !correctPassword(reg.Password, regDomain.Password) {
		t.Errorf("The password [%s] does not match the hash [%s]", reg.Password, regDomain.Password)
	}

	// Not found
	regNotfound, _ := DB.GetByDomain("does-not-exist")
	if len(regNotfound) > 0 {
		t.Errorf("No records should be returned.")
	}
}

func TestUpdate(t *testing.T) {
	// Create  reg to refer to
	reg, err := DB.Register()
	if err != nil {
		t.Errorf("Registration failed, got error [%v]", err)
	}

	regUser, err := DB.GetByUsername(reg.Username)
	if err != nil {
		t.Errorf("Could not get test user, got error [%v]", err)
	}

	// Set new values (only TXT should be updated) (matches by username and subdomain)

	validTXT := "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

	regUser.Password = "nevergonnagiveyouup"
	regUser.Value = validTXT

	err = DB.Update(regUser)
	if err != nil {
		t.Errorf("DB Update failed, got error: [%v]", err)
	}

	updUser, err := DB.GetByUsername(regUser.Username)
	if err != nil {
		t.Errorf("GetByUsername threw error [%v]", err)
	}
	if updUser.Value != validTXT {
		t.Errorf("Update failed, fetched value [%s] does not match the update value [%s]", updUser.Value, validTXT)
	}
}