import {
  Body,
  Controller,
  Delete,
  Get,
  Param,
  Patch,
  Post,
  Put,
  Query,
} from '@nestjs/common';
import {
  ApiCreatedResponse,
  ApiOkResponse,
  ApiOperation,
  ApiParam,
  ApiTags,
} from '@nestjs/swagger';
import { User } from '@task-stream/api/identity/domain';
import {
  AccessToken,
  ApiOptionalPireonAuth,
  ApiPireonAuth,
  CurrentUser,
} from '@task-stream/api/identity/presenters';
import {
  ApiCommandErrors,
  ApiReadErrors,
} from '@task-stream/api/shared/presenters';
import {
  IssuesService,
  ProjectsService,
} from '@task-stream/api/tracker/application';
import {
  ActivityQueryDto,
  AddMemberDto,
  AnalyticsQueryDto,
  BoardQueryDto,
  ChangeMemberRoleDto,
  CreateProjectDto,
  DeleteProjectQueryDto,
  ProjectSettingsBodyDto,
  UpdateProjectDto,
} from './dto/requests.dto';
import {
  ActivityDto,
  BoardColumnDto,
  CommandResultDto,
  ProjectAnalyticsDto,
  ProjectDto,
  ProjectStatsDto,
} from './dto/responses.dto';
import { fromSettingsPayload } from '../common/settings';
import { viewerOf } from '../common/viewer';
import { Refs, toProjectDto } from './refs';

const PROJECT = ApiParam({
  name: 'project',
  description: 'Project id or key',
  example: 'WEB',
});

/** REST adapter of the project use cases (same services as GraphQL). */
@ApiTags('Projects')
@ApiPireonAuth()
@Controller('projects')
export class ProjectsController {
  constructor(
    private readonly projects: ProjectsService,
    private readonly issues: IssuesService,
    private readonly refs: Refs,
  ) {}

  @Get()
  @ApiOperation({ summary: 'Projects where I am a member' })
  @ApiOkResponse({ type: [ProjectDto] })
  @ApiReadErrors()
  async mine(@CurrentUser() me: User) {
    return (await this.projects.findMine(me.id)).map(toProjectDto);
  }

  @Post()
  @ApiOperation({ summary: 'Create a project (you become its owner)' })
  @ApiCreatedResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  create(@CurrentUser() me: User, @Body() body: CreateProjectDto) {
    return this.projects.create(me.id, body);
  }

  @Get(':project')
  @ApiOptionalPireonAuth()
  @PROJECT
  @ApiOperation({ summary: 'A project with its members and settings' })
  @ApiOkResponse({ type: ProjectDto })
  @ApiReadErrors()
  async findOne(
    @CurrentUser() me: User | undefined,
    @Param('project') project: string,
  ) {
    return toProjectDto(await this.projects.findOne(viewerOf(me), project));
  }

  @Patch(':project')
  @PROJECT
  @ApiOperation({
    summary: 'Rename, describe or make public/private a project (owner/admin)',
  })
  @ApiOkResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  async update(
    @CurrentUser() me: User,
    @Param('project') project: string,
    @Body() body: UpdateProjectDto,
  ) {
    return this.projects.update(
      me.id,
      await this.refs.projectId(me.id, project),
      body,
    );
  }

  @Delete(':project')
  @PROJECT
  @ApiOperation({
    summary: 'Delete a project (owner only)',
    description:
      'Deletes the project and, right after (asynchronously, through a saga), its tickets, comments and releases; ' +
      'links from tickets of other projects are removed and the key becomes free. Cannot be undone from the API. ' +
      '`confirm` must be the project key.',
  })
  @ApiOkResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  async remove(
    @CurrentUser() me: User,
    @Param('project') project: string,
    @Query() query: DeleteProjectQueryDto,
  ) {
    return this.projects.delete(
      me.id,
      await this.refs.projectId(me.id, project),
      query.confirm,
    );
  }

  @Put(':project/settings')
  @PROJECT
  @ApiOperation({
    summary: 'Statuses, transitions, ticket types and areas (owner/admin)',
    description:
      'Replaces the whole configuration (send what GET /projects/{project} returns, changed). ' +
      'Values can be added, renamed, reordered or archived, never removed: tickets and statistics keep referring to them.',
  })
  @ApiOkResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  async updateSettings(
    @CurrentUser() me: User,
    @Param('project') project: string,
    @Body() body: ProjectSettingsBodyDto,
  ) {
    return this.projects.updateSettings(
      me.id,
      await this.refs.projectId(me.id, project),
      fromSettingsPayload(body),
    );
  }

  @Get(':project/board')
  @ApiOptionalPireonAuth()
  @PROJECT
  @ApiOperation({ summary: 'Kanban board: one column per status' })
  @ApiOkResponse({ type: [BoardColumnDto] })
  @ApiReadErrors()
  async board(
    @CurrentUser() me: User | undefined,
    @Param('project') project: string,
    @Query() query: BoardQueryDto,
  ) {
    const columns = await this.projects.board(
      viewerOf(me),
      {
        projectId: await this.refs.projectId(viewerOf(me), project),
        releaseId: query.releaseId,
        assigneeId: query.assigneeId,
        areas: query.area ? [query.area] : undefined,
        types: query.type,
        priorities: query.priority,
        labels: query.label,
        search: query.search,
        unassigned: query.unassigned,
        sprintId: query.sprintId,
      },
      query.perColumn,
    );
    return Promise.all(
      columns.map(async (column) => ({
        ...column,
        issues: await this.refs.issueDtos(column.issues),
      })),
    );
  }

  @Get(':project/stats')
  @ApiOptionalPireonAuth()
  @PROJECT
  @ApiOperation({
    summary: 'Tracking dashboard: counts by status, type, person…',
  })
  @ApiOkResponse({ type: ProjectStatsDto })
  @ApiReadErrors()
  async stats(
    @CurrentUser() me: User | undefined,
    @Param('project') project: string,
  ) {
    return this.projects.stats(
      viewerOf(me),
      await this.refs.projectId(viewerOf(me), project),
    );
  }

  @Get(':project/analytics')
  @ApiOptionalPireonAuth()
  @PROJECT
  @ApiOperation({
    summary: 'Statistics of the last `days` days',
    description:
      'Created vs resolved per week, cumulative flow per day, cycle and lead time, throughput per person and QA pass/fail.',
  })
  @ApiOkResponse({ type: ProjectAnalyticsDto })
  @ApiReadErrors()
  async analytics(
    @CurrentUser() me: User | undefined,
    @Param('project') project: string,
    @Query() query: AnalyticsQueryDto,
  ) {
    return this.projects.analytics(
      viewerOf(me),
      await this.refs.projectId(viewerOf(me), project),
      query.days,
    );
  }

  @Get(':project/activity')
  @ApiOptionalPireonAuth()
  @PROJECT
  @ApiOperation({ summary: 'Activity feed (newest first)' })
  @ApiOkResponse({ type: [ActivityDto] })
  @ApiReadErrors()
  async activity(
    @CurrentUser() me: User | undefined,
    @Param('project') project: string,
    @Query() query: ActivityQueryDto,
  ) {
    return this.issues.activity(viewerOf(me), {
      projectId: await this.refs.projectId(viewerOf(me), project),
      issueId: query.issueId,
      limit: query.limit,
      before: query.before,
    });
  }

  @Post(':project/members')
  @PROJECT
  @ApiOperation({
    summary: 'Add a Pireon user to the project (owner/admin)',
    description: 'The user must exist and be active in Pireon.',
  })
  @ApiCreatedResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  async addMember(
    @CurrentUser() me: User,
    @AccessToken() token: string,
    @Param('project') project: string,
    @Body() body: AddMemberDto,
  ) {
    const projectId = await this.refs.projectId(me.id, project);
    return this.projects.addMember(me.id, { projectId, ...body }, token);
  }

  @Patch(':project/members/:userId')
  @PROJECT
  @ApiOperation({ summary: "Change a member's role (owner/admin)" })
  @ApiOkResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  async changeMemberRole(
    @CurrentUser() me: User,
    @Param('project') project: string,
    @Param('userId') userId: string,
    @Body() body: ChangeMemberRoleDto,
  ) {
    const projectId = await this.refs.projectId(me.id, project);
    return this.projects.changeMemberRole(me.id, {
      projectId,
      userId,
      role: body.role,
    });
  }

  @Delete(':project/members/:userId')
  @PROJECT
  @ApiOperation({
    summary: 'Remove a member (owner/admin, or yourself to leave)',
  })
  @ApiOkResponse({ type: CommandResultDto })
  @ApiCommandErrors()
  async removeMember(
    @CurrentUser() me: User,
    @Param('project') project: string,
    @Param('userId') userId: string,
  ) {
    return this.projects.removeMember(
      me.id,
      await this.refs.projectId(me.id, project),
      userId,
    );
  }
}