package common

import "encoding/json"

type Membership string

const (
	MembershipInvite Membership = "invite"
	MembershipJoin   Membership = "join"
	MembershipKnock  Membership = "knock"
	MembershipLeave  Membership = "leave"
	MembershipBan    Membership = "ban"
)

// Type is type of event
type EventType string

const (
	// https://matrix.org/docs/spec/client_server/latest#m-room-aliases
	Aliases EventType = "m.room.aliases"

	// https://matrix.org/docs/spec/client_server/latest#m-room-canonical-alias
	CanonicalAlias EventType = "m.room.canonical_alias"

	// https://matrix.org/docs/spec/client_server/latest#m-room-create
	Create EventType = "m.room.create"

	// https://matrix.org/docs/spec/client_server/latest#m-room-join-rules
	JoinRules EventType = "m.room.join_rules"

	// https://matrix.org/docs/spec/client_server/latest#m-room-member
	Member EventType = "m.room.member"

	// https://matrix.org/docs/spec/client_server/latest#m-room-power-levels
	PowerLevels EventType = "m.room.power_levels"

	// https://matrix.org/docs/spec/client_server/latest#m-room-redaction
	Redaction EventType = "m.room.redaction"

	// https://matrix.org/docs/spec/client_server/latest#m-room-message
	Message EventType = "m.room.message"

	// https://matrix.org/docs/spec/client_server/latest#m-room-message-feedback
	MessageFeedback EventType = "m.room.message.feedback"

	// https://matrix.org/docs/spec/client_server/latest#m-room-name
	Name EventType = "m.room.name"

	// https://matrix.org/docs/spec/client_server/latest#m-room-topic
	Topic EventType = "m.room.topic"

	// https://matrix.org/docs/spec/client_server/latest#m-room-avatar
	Avatar EventType = "m.room.avatar"

	// https://matrix.org/docs/spec/client_server/latest#m-room-pinned-events
	PinnedEvents EventType = "m.room.pinned_events"
)

type Event struct {
	// TODO: object
	Content json.RawMessage `json:"content"` // Required. The fields in this object will vary depending on the type of event. When interacting with the REST API, this is the HTTP body.
	Type    string          `json:"type"`    // Required. The type of event. This SHOULD be namespaced similar to Java package naming conventions e.g. 'com.example.subdomain.event.type'
}

type EventContent struct {
	AvatarURL string `json:"avatar_url"` // The avatar URL for this user, if any. This is added by the homeserver.
	// TODO: string or null
	DisplayName      string       `json:"displayname"`        // The display name for this user, if any. This is added by the homeserver.
	Membership       Membership   `json:"membership"`         // Required. The membership state of the user. One of: ["invite", "join", "knock", "leave", "ban"]
	IsDirect         bool         `json:"is_direct"`          // Flag indicating if the room containing this event was created with the intention of being a direct chat. See Direct Messaging.
	ThirdPartyInvite Invite       `json:"third_party_invite"` //
	Unsigned         UnsignedData `json:"unsigned"`           // Contains optional extra information about the event.
}

type StateEvent struct {
	// TODO: object?
	Content        json.RawMessage `json:"content"`          // Required. The fields in this object will vary depending on the type of event. When interacting with the REST API, this is the HTTP body.
	Type           string          `json:"type"`             // Required. The type of event. This SHOULD be namespaced similar to Java package naming conventions e.g. 'com.example.subdomain.event.type'
	EventID        string          `json:"event_id"`         // Required. The globally unique event identifier.
	Sender         string          `json:"sender"`           // Required. Contains the fully-qualified ID of the user who sent this event.
	OriginServerTs int             `json:"origin_server_ts"` // Required. Timestamp in milliseconds on originating homeserver when this event was sent.
	Unsigned       UnsignedData    `json:"unsigned"`         // Contains optional extra information about the event.
	PrevContent    EventContent    `json:"prev_content"`     // Optional. The previous content for this event. If there is no previous content, this key will be missing.
	StateKey       string          `json:"state_key"`        // Required. A unique key which defines the overwriting semantics for this piece of room state. This value is often a zero-length string. The presence of this key makes this event a State Event. State keys starting with an @ are reserved for referencing user IDs, such as room members. With the exception of a few events, state events set with a given user's ID as the state key MUST only be set by that user.
}

type signed struct {
	Mxid string `json:"mxid"` // Required. The invited matrix user ID. Must be equal to the user_id property of the event.
	// TODO:
	// Signatures Signatures `json:"signatures"` // Required. A single signature from the verifying server, in the format specified by the Signing Events section of the server-server API.
	Token string `json:"token"` // Required. The token property of the containing third_party_invite object.
}

type State struct {
	events []StateEvent `json:"events"` // List of events.
}

type Invite struct {
	DisplayName string `json:"display_name"` // Required. A name which can be displayed to represent the user instead of their third party identifier
	Signed      signed `json:"signed"`       // Required. A block of content which has been signed, which servers can use to verify the event. Clients should ignore this.
}

type Ephemeral struct {
	Events []Event `json:"events"` // List of events.
}

type StrippedState struct {
	// TODO: в документации EventContent, хотя вроде сервер выдаёт json.RawMessage
	Content  json.RawMessage `json:"content"`   // Required. The content for the event.
	StateKey string          `json:"state_key"` // Required. The state_key for the event.
	Type     string          `json:"type"`      // Required. The type for the event.
	Sender   string          `json:"sender"`    // Required. The sender for the event.
}