import { IssuePriority, ReviewVerdict } from '../models/enums';
import { MyDay } from '../models/my-day';
import { Home } from '../models/home';
import { PortfolioProject, ProjectInsights } from '../models/insights';
import {
  DashboardShare,
  PublicReleaseNotes,
  ReleaseNotesShare,
  SharedBlock,
  SharedDashboard,
} from '../models/sharing';
import { Observable } from 'rxjs';
import {
  Activity,
  Attachment,
  Automation,
  AutomationInput,
  BoardColumn,
  CalendarFeed,
  PushDeviceSubscription,
  CommandResult,
  AlertIntegration,
  Comment,
  Decision,
  Typing,
  Epic,
  GitIntegration,
  GitRepository,
  ImportReport,
  Issue,
  IssuePage,
  IssueSummary,
  Notification,
  NotificationSettings,
  Project,
  ProjectAnalytics,
  ProjectStats,
  Release,
  ReleaseBurnup,
  SavedFilter,
  Presence,
  MyView,
  MyViewCriteria,
  SavedFilterCriteria,
  Sprint,
  SprintBurndown,
  UserDirectoryEntry,
  Webhook,
  WebhookDelivery,
} from '../models/models';
import { ProjectSettings } from '../models/workflow';
import {
  BoardFilter,
  ChangeStatusInput,
  CreateIssueInput,
  CreateProjectInput,
  CreateReleaseInput,
  LinkIssuesInput,
  MemberInput,
  IssueListFilter,
  ProposalInput,
  ProposalResult,
  MyIssuesFilter,
  UpdateIssueInput,
  UpdateProjectInput,
  CreateSprintInput,
  BulkChange,
  BulkResult,
  UpdateSprintInput,
} from '../models/inputs';

/*
 * Outbound ports of the tracker. The application layer depends on these
 * abstract classes; the infrastructure layer implements them over GraphQL.
 */

export abstract class ProjectsGateway {
  abstract myProjects(): Observable<Project[]>;
  /** Projects anyone can read (no sign-in needed). */
  abstract publicProjects(): Observable<Project[]>;
  abstract project(idOrKey: string): Observable<Project>;
  abstract stats(projectId: string): Observable<ProjectStats>;
  /** My active projects at a glance. */
  abstract portfolio(): Observable<PortfolioProject[]>;
  /** The home page beyond «my work». */
  abstract myHome(): Observable<Home>;
  /** The dashboard; with `since`, also what changed after it. */
  abstract insights(
    projectId: string,
    since: string | null,
  ): Observable<ProjectInsights>;
  /** Archives the project (read-only) or brings it back. Owner only. */
  abstract setArchived(
    projectId: string,
    archived: boolean,
  ): Observable<CommandResult>;
  /** Statistics of the last `days` days. */
  abstract analytics(
    projectId: string,
    days: number,
  ): Observable<ProjectAnalytics>;
  /** Replaces statuses, transitions, types and areas (owners and admins). */
  abstract updateSettings(
    projectId: string,
    settings: ProjectSettings,
  ): Observable<CommandResult>;
  abstract create(input: CreateProjectInput): Observable<CommandResult>;
  /** Name, description or visibility (owners and admins). */
  abstract update(input: UpdateProjectInput): Observable<CommandResult>;
  /** Owner only; `confirmKey` must be the project key. */
  abstract delete(
    projectId: string,
    confirmKey: string,
  ): Observable<CommandResult>;
  abstract addMember(input: MemberInput): Observable<CommandResult>;
  abstract changeMemberRole(input: MemberInput): Observable<CommandResult>;
  abstract removeMember(
    projectId: string,
    userId: string,
  ): Observable<CommandResult>;
}

export abstract class IssuesGateway {
  abstract board(filter: BoardFilter): Observable<BoardColumn[]>;
  abstract issue(idOrKey: string): Observable<Issue>;
  abstract search(projectId: string, text: string): Observable<IssueSummary[]>;
  /** A project's tickets for the list view (most recently updated first). */
  abstract list(filter: IssueListFilter): Observable<IssuePage>;
  /** Tickets across all my projects (most recently updated first). */
  abstract mine(filter: MyIssuesFilter): Observable<IssuePage>;
  abstract create(input: CreateIssueInput): Observable<CommandResult>;
  /** Votes for it (`on`) or takes the vote back. */
  abstract vote(issueId: string, on: boolean): Observable<CommandResult>;
  /** A copy of what the ticket says; the result carries its key. */
  abstract duplicate(issueId: string): Observable<CommandResult>;
  abstract update(input: UpdateIssueInput): Observable<CommandResult>;
  abstract changeStatus(input: ChangeStatusInput): Observable<CommandResult>;
  abstract assign(
    issueId: string,
    assigneeId: string | null,
  ): Observable<CommandResult>;
  abstract link(input: LinkIssuesInput): Observable<CommandResult>;
  abstract unlink(input: LinkIssuesInput): Observable<CommandResult>;
  abstract setRelease(
    issueId: string,
    releaseId: string | null,
  ): Observable<CommandResult>;
  /** Asks a member to review the ticket. */
  abstract requestReview(
    issueId: string,
    reviewerId: string,
    note: string | null,
  ): Observable<CommandResult>;
  /** Answers a review I was asked for. */
  abstract answerReview(
    issueId: string,
    reviewId: string,
    verdict: ReviewVerdict,
    answer: string | null,
  ): Observable<CommandResult>;
  abstract cancelReview(
    issueId: string,
    reviewId: string,
  ): Observable<CommandResult>;
  /** The signed-in person follows (or stops following) the ticket. */
  abstract watch(issueId: string, watching: boolean): Observable<CommandResult>;
  /** My pinned tickets, most recently pinned first. */
  abstract pins(): Observable<IssueSummary[]>;
  /** Pins the ticket for me (or unpins it): private, at most 20. */
  abstract pin(issueId: string, pinned: boolean): Observable<void>;
  /** Follows the ticket with everything under it (or stops). */
  abstract followTree(issueId: string, on: boolean): Observable<void>;
  /** Reminds me of the ticket then (replaces the waiting one). */
  abstract setReminder(
    issueId: string,
    at: string,
    note: string | null,
  ): Observable<void>;
  abstract clearReminder(issueId: string): Observable<void>;
  /** «Mi día» on `day` (today, `YYYY-MM-DD` in my time zone). */
  abstract myDay(day: string): Observable<MyDay>;
  abstract addToMyDay(day: string, issueIds: string[]): Observable<void>;
  abstract removeFromMyDay(day: string, issueId: string): Observable<void>;
  /**
   * Decisions (comments marked as such) of all my projects by their text,
   * most recent first: here and not in CommentsGateway, for the palette.
   */
  abstract searchDecisions(
    search: string,
    limit: number,
  ): Observable<Decision[]>;
  /** Tickets hanging from `issueId`. */
  abstract children(
    projectId: string,
    issueId: string,
  ): Observable<IssueSummary[]>;
  /** Places the ticket under `parentId` (null: back to the top). */
  abstract setParent(
    issueId: string,
    parentId: string | null,
  ): Observable<CommandResult>;
  abstract epics(projectId: string): Observable<Epic[]>;
  /** Tickets due between two days (`YYYY-MM-DD`, both included). */
  abstract due(
    projectId: string,
    from: string,
    to: string,
  ): Observable<IssueSummary[]>;
  /** To the trash (whoever opened it, or a manager). */
  abstract trash(issueId: string): Observable<CommandResult>;
  abstract restore(issueId: string): Observable<CommandResult>;
  /** The project's tickets in the trash, newest first. */
  abstract trashed(projectId: string): Observable<IssueSummary[]>;
  /** The same change on several tickets; each may refuse on its own. */
  abstract bulkUpdate(
    issueIds: string[],
    change: BulkChange,
  ): Observable<BulkResult>;
  /** Tickets still to start (TODO category), in backlog order. */
  abstract backlog(projectId: string): Observable<IssuePage>;
  /** Moves a ticket between two others of the backlog (null: an end). */
  abstract rank(
    issueId: string,
    aboveIssueId: string | null,
    belowIssueId: string | null,
  ): Observable<CommandResult>;
  abstract addChecklistItem(
    issueId: string,
    text: string,
  ): Observable<CommandResult>;
  abstract updateChecklistItem(
    issueId: string,
    itemId: string,
    changes: { text?: string; done?: boolean },
  ): Observable<CommandResult>;
  abstract removeChecklistItem(
    issueId: string,
    itemId: string,
  ): Observable<CommandResult>;
}

/** The project's automation rules (owners and admins). */
export abstract class AutomationsGateway {
  abstract list(projectId: string): Observable<Automation[]>;
  abstract create(
    projectId: string,
    rule: AutomationInput,
  ): Observable<Automation>;
  abstract update(
    automationId: string,
    changes: { name?: string; active?: boolean },
  ): Observable<Automation>;
  abstract remove(automationId: string): Observable<void>;
}

/** Tickets in and out as CSV. */
export abstract class TransferGateway {
  abstract exportCsv(projectId: string): Observable<Blob>;
  /** `dryRun`: only tell what would be created. */
  abstract importCsv(
    projectId: string,
    file: File,
    dryRun: boolean,
  ): Observable<ImportReport>;
}

/** The project's outgoing webhooks (owners and admins). */
export abstract class WebhooksGateway {
  abstract list(projectId: string): Observable<Webhook[]>;
  abstract events(): Observable<string[]>;
  /** The secret comes back only here. */
  abstract create(
    projectId: string,
    url: string,
    events: string[],
  ): Observable<{ id: string; secret: string }>;
  abstract update(
    webhookId: string,
    changes: { url?: string; events?: string[]; active?: boolean },
  ): Observable<Webhook>;
  abstract remove(webhookId: string): Observable<void>;
  abstract test(webhookId: string): Observable<WebhookDelivery>;
}

/** The project's Git webhook (owners and admins configure it). */
/** Alerts → bugs (owners and admins). */
export abstract class AlertsGateway {
  abstract integration(projectId: string): Observable<AlertIntegration>;
  /** Turns it on, or changes what it opens; the URL stays. */
  abstract save(
    projectId: string,
    settings: { typeId: string | null; priority: IssuePriority },
  ): Observable<AlertIntegration>;
  /** A new URL; the old one stops working. */
  abstract rotateToken(projectId: string): Observable<AlertIntegration>;
  abstract disable(projectId: string): Observable<void>;
}

export abstract class GitGateway {
  abstract integration(projectId: string): Observable<GitIntegration>;
  /** A repository with its own secret (the first turns the integration on). */
  abstract addRepository(
    projectId: string,
    name: string,
  ): Observable<GitRepository>;
  abstract rotateSecret(
    projectId: string,
    repositoryId: string,
  ): Observable<GitRepository>;
  abstract removeRepository(
    projectId: string,
    repositoryId: string,
  ): Observable<void>;
}

/** Saved views of a project's board (mine and the shared ones). */
export abstract class SavedFiltersGateway {
  abstract list(projectId: string): Observable<SavedFilter[]>;
  abstract save(input: {
    projectId: string;
    name: string;
    shared: boolean;
    criteria: SavedFilterCriteria;
  }): Observable<string>;
  abstract remove(id: string): Observable<void>;
  /** My views of «my work», by name. */
  abstract myViews(): Observable<MyView[]>;
  abstract saveMyView(input: {
    name: string;
    criteria: MyViewCriteria;
  }): Observable<string>;
  abstract removeMyView(id: string): Observable<void>;
}

export abstract class CommentsGateway {
  abstract list(issueId: string): Observable<Comment[]>;
  abstract add(
    issueId: string,
    body: string,
    replyTo?: string | null,
    /** A quick poll's options (2–6). */
    poll?: string[] | null,
  ): Observable<CommandResult>;
  /** Votes in a comment's poll (null takes the vote back). */
  abstract votePoll(
    commentId: string,
    option: number | null,
  ): Observable<CommandResult>;
  /** Closes a poll; with `decide`, its winner stays as a decision. */
  abstract closePoll(
    commentId: string,
    decide: boolean,
  ): Observable<CommandResult>;
  abstract edit(commentId: string, body: string): Observable<CommandResult>;
  /** Adds (`on`) or takes back one's reaction. */
  abstract react(
    commentId: string,
    emoji: string,
    on: boolean,
  ): Observable<CommandResult>;
  abstract remove(commentId: string): Observable<CommandResult>;
  /**
   * Settles a conversation (or reopens it); a conclusion is added as a
   * reply marked as a decision.
   */
  abstract resolveThread(
    commentId: string,
    resolved: boolean,
    conclusion: string | null,
  ): Observable<CommandResult>;
  /** Marks it as a decision of its ticket (`on`) or unmarks it. */
  abstract markDecision(
    commentId: string,
    on: boolean,
  ): Observable<CommandResult>;
}

/** A ticket's files. Uploads and downloads go through the REST API. */
/** The ticket's acknowledgement and the new file's id. */
export type AttachmentUploaded = CommandResult & { attachmentId: string };

/** The public form: no session needed. */
export abstract class ProposalsGateway {
  abstract submit(
    projectKey: string,
    proposal: ProposalInput,
  ): Observable<ProposalResult>;
}

export abstract class AttachmentsGateway {
  abstract upload(
    issueId: string,
    file: File,
    commentId?: string | null,
  ): Observable<AttachmentUploaded>;
  /** The file's bytes, to show (images) or save. */
  abstract download(issueId: string, attachment: Attachment): Observable<Blob>;
  abstract remove(
    issueId: string,
    attachmentId: string,
  ): Observable<CommandResult>;
}

export abstract class ReleasesGateway {
  abstract list(projectId: string): Observable<Release[]>;
  /** Planned releases of all my projects, soonest target date first. */
  abstract upcoming(limit: number): Observable<Release[]>;
  abstract create(input: CreateReleaseInput): Observable<CommandResult>;
  abstract publish(
    releaseId: string,
    force: boolean,
  ): Observable<CommandResult>;
  /** Its unfinished tickets go to `moveTo` (an open release) or leave it. */
  abstract archive(
    releaseId: string,
    moveTo?: string | null,
  ): Observable<CommandResult>;
  abstract burnup(releaseId: string): Observable<ReleaseBurnup>;
  /** A Markdown draft from the release's finished tickets (not saved). */
  abstract notesDraft(releaseId: string): Observable<string>;
  /** null removes them. */
  abstract writeNotes(
    releaseId: string,
    notes: string | null,
  ): Observable<CommandResult>;
}

export abstract class SprintsGateway {
  /** With their progress: under way, planned, then closed. */
  abstract list(projectId: string): Observable<Sprint[]>;
  abstract burndown(sprintId: string): Observable<SprintBurndown>;
  abstract create(input: CreateSprintInput): Observable<CommandResult>;
  abstract update(input: UpdateSprintInput): Observable<CommandResult>;
  abstract start(sprintId: string): Observable<CommandResult>;
  /** Unfinished tickets go to `carryOverTo` (null: the backlog). */
  abstract close(
    sprintId: string,
    carryOverTo: string | null,
  ): Observable<CommandResult>;
  abstract remove(sprintId: string): Observable<CommandResult>;
  abstract setIssueSprint(
    issueId: string,
    sprintId: string | null,
  ): Observable<CommandResult>;
}

export abstract class ActivityGateway {
  abstract list(projectId: string, issueId?: string): Observable<Activity[]>;
  /** What happened that day (`YYYY-MM-DD`, UTC), newest first (200 at most). */
  abstract onDay(projectId: string, day: string): Observable<Activity[]>;
}

export abstract class UsersGateway {
  abstract search(term: string): Observable<UserDirectoryEntry[]>;
}

/** The signed-in person's notifications. */
export abstract class CalendarGateway {
  /** Mine, if I made one. */
  abstract mine(): Observable<CalendarFeed | null>;
  /** A new secret URL; the previous one stops working. */
  abstract create(): Observable<CalendarFeed>;
  abstract revoke(): Observable<void>;
}

/** The project's dashboard for clients, behind a secret link. */
export abstract class SharingGateway {
  /** The project's link, if it has one (owners and admins). */
  abstract share(projectId: string): Observable<DashboardShare | null>;
  /** Turns it on or changes its blocks; `renew` makes a new secret. */
  abstract save(
    projectId: string,
    blocks: SharedBlock[],
    renew: boolean,
  ): Observable<DashboardShare>;
  abstract remove(projectId: string): Observable<void>;
  /** What a link shows, for anyone (null: no such link). */
  abstract shared(token: string): Observable<SharedDashboard | null>;
  /** A release's public notes link, if any (owners and admins). */
  abstract releaseNotesShare(
    releaseId: string,
  ): Observable<ReleaseNotesShare | null>;
  /** Turns it on; `renew` makes a new link. */
  abstract shareReleaseNotes(
    releaseId: string,
    renew: boolean,
  ): Observable<ReleaseNotesShare>;
  abstract unshareReleaseNotes(releaseId: string): Observable<void>;
  /** A release's notes for anyone with the link (null: no such link). */
  abstract publicReleaseNotes(
    token: string,
  ): Observable<PublicReleaseNotes | null>;
}

export abstract class NotificationsGateway {
  abstract mine(
    unreadOnly: boolean,
    limit: number,
  ): Observable<{ items: Notification[]; unread: number }>;
  /** Without ids: all of them. */
  abstract markRead(ids?: string[]): Observable<void>;
  abstract settings(): Observable<NotificationSettings>;
  abstract updateSettings(email: boolean): Observable<NotificationSettings>;
  /** Push on this device. */
  abstract subscribePush(
    subscription: PushDeviceSubscription,
  ): Observable<void>;
  /** Push off on this device. */
  abstract unsubscribePush(endpoint: string): Observable<void>;
}

/**
 * This browser's side of push: its service worker and push subscription.
 * Not every browser has it (and on iPhone only an installed web app does).
 */
export abstract class PushDevice {
  abstract get supported(): boolean;
  /** This browser's subscription, if push is on here. */
  abstract current(): Promise<PushDeviceSubscription | null>;
  /** Asks for permission and subscribes; throws when refused. */
  abstract subscribe(publicKey: string): Promise<PushDeviceSubscription>;
  /** Unsubscribes; the endpoint it had, if any. */
  abstract unsubscribe(): Promise<string | null>;
}

/** Realtime (GraphQL subscriptions over WebSocket). */
export interface IssueChanged {
  action: string;
  version: number;
  actorId: string;
  issue: IssueSummary;
}

export interface CommentChanged {
  action: string;
  commentId: string;
  comment: Comment | null;
}

/** A project changed, or was deleted (then `project` is its last state). */
export interface ProjectChanged {
  project: Project;
  deleted: boolean;
}

/** Realtime needs a session: without one, these streams stay silent. */
export abstract class TrackerRealtimeGateway {
  abstract issueChanges(projectId: string): Observable<IssueChanged>;
  abstract commentChanges(issueId: string): Observable<CommentChanged>;
  abstract activity(projectId: string): Observable<Activity>;
  abstract releaseChanges(projectId: string): Observable<Release>;
  /** Something about a sprint of the project changed (or it was deleted). */
  abstract sprintChanges(projectId: string): Observable<{ sprintId: string }>;
  abstract projectChanges(projectId: string): Observable<ProjectChanged>;
  abstract myProjectsChanges(): Observable<ProjectChanged>;
  abstract notifications(): Observable<Notification>;
  /**
   * Each time the live connection comes back after a cut: what happened
   * meanwhile was not received, so views reload.
   */
  abstract reconnects(): Observable<void>;
}

/** Who is on a ticket's page: a heartbeat answers who else is. */
export abstract class PresenceGateway {
  abstract touch(issueId: string, editing: boolean): Observable<Presence[]>;
  abstract leave(issueId: string): Observable<void>;
  /** I am writing (an answer to `threadId`, or a new comment). */
  abstract typing(issueId: string, threadId: string | null): Observable<void>;
  /** Who is writing on the ticket, as they type (me included). */
  abstract typists(issueId: string): Observable<Typing>;
}