package dotweb

const (
	requestHeaderUseMockKey  = "dotweb_req_mock"
	requestHeaderUseMockFlag = "true"
)

// MockHandle the handle define on mock module
type MockHandle func(ctx Context)

// Mock the define Mock module
type Mock interface {
	// Register register MockHandle on route
	Register(route string, handler MockHandle)
	// RegisterString register return mock string on route
	RegisterString(route string, resData interface{})
	// RegisterJSON register return mock json on route
	RegisterJSON(route string, resData interface{})
	// CheckNeedMock check is need do mock logic
	CheckNeedMock(Context) bool
	// Do do mock logic
	Do(Context)
}

// StandardMock standard mock implement for Mock interface
type StandardMock struct {
	routeMap map[string]MockHandle
}

// NewStandardMock create new StandardMock
func NewStandardMock() *StandardMock {
	return &StandardMock{routeMap: make(map[string]MockHandle)}
}

// CheckNeedMock check is need do mock logic
func (m *StandardMock) CheckNeedMock(ctx Context) bool {
	if ctx.Request().QueryHeader(requestHeaderUseMockKey) == requestHeaderUseMockFlag {
		return true
	}
	return false
}

// Do do mock logic
func (m *StandardMock) Do(ctx Context) {
	handler, exists := m.routeMap[ctx.RouterNode().Node().fullPath]
	if exists {
		handler(ctx)
	}
}

// Register register MockHandle on route
func (m *StandardMock) Register(route string, handler MockHandle) {
	m.routeMap[route] = handler
}

// RegisterString register return mock string on route
func (m *StandardMock) RegisterString(route string, resData interface{}) {
	m.routeMap[route] = func(ctx Context) {
		ctx.Response().SetHeader(requestHeaderUseMockKey, requestHeaderUseMockFlag)
		ctx.WriteString(resData)
		ctx.End()
	}
}

// RegisterJSON register return mock json on route
func (m *StandardMock) RegisterJSON(route string, resData interface{}) {
	m.routeMap[route] = func(ctx Context) {
		ctx.Response().SetHeader(requestHeaderUseMockKey, requestHeaderUseMockFlag)
		ctx.WriteJson(resData)
		ctx.End()
	}
}