import {
  ApiProperty,
  ApiPropertyOptional,
  OmitType,
  PartialType,
} from '@nestjs/swagger';
import {
  IssueLinkType,
  IssuePriority,
  ProjectRole,
  SETTING_COLORS,
  StatusCategory,
  TYPE_ICONS,
} from '@task-stream/api/tracker/domain';
import { Transform, Type } from 'class-transformer';
import {
  ArrayMaxSize,
  IsArray,
  IsBoolean,
  IsEnum,
  IsIn,
  IsInt,
  IsISO8601,
  IsOptional,
  IsUUID,
  IsString,
  IsUrl,
  Matches,
  Max,
  MaxLength,
  Min,
  MinLength,
  ValidateIf,
  ValidateNested,
} from 'class-validator';

/* REST request bodies and query strings, validated like the GraphQL inputs. */

/** `?status=TODO&status=DONE` or `?status=TODO,DONE` → ['TODO', 'DONE']. */
const toList = ({ value }: { value: unknown }) =>
  value === undefined || value === ''
    ? undefined
    : ([] as unknown[])
        .concat(value)
        .flatMap((v) => String(v).split(','))
        .map((v) => v.trim())
        .filter(Boolean);

const toBoolean = ({ value }: { value: unknown }) =>
  value === undefined ? undefined : value === true || value === 'true';

/** Ids of statuses, types and areas (checked against the project's settings). */
const SETTING_ID = /^[A-Za-z][A-Za-z0-9_]{0,29}$/;

// ---- Projects ---------------------------------------------------------------

export class CreateProjectDto {
  @ApiProperty({
    example: 'WEB',
    description:
      '2-10 letters/digits starting with a letter → tickets WEB-1, WEB-2…',
  })
  @Matches(/^[A-Za-z][A-Za-z0-9]{1,9}$/)
  key!: string;

  @ApiProperty({ example: 'Checkout revamp', maxLength: 120 })
  @IsString()
  @MinLength(1)
  @MaxLength(120)
  name!: string;

  @ApiPropertyOptional({ type: String, nullable: true, maxLength: 5000 })
  @IsOptional()
  @IsString()
  @MaxLength(5000)
  description?: string | null;

  @ApiPropertyOptional({
    default: false,
    description:
      'Anyone can read it without signing in (board, tickets, comments, releases, activity, statistics)',
  })
  @IsOptional()
  @IsBoolean()
  isPublic?: boolean;
}

export class UpdateProjectDto extends PartialType(
  OmitType(CreateProjectDto, ['key'] as const),
) {}

export class DeleteProjectQueryDto {
  @ApiProperty({
    example: 'WEB',
    description: 'The project key, to confirm the deletion',
  })
  @IsString()
  confirm!: string;
}

export class AddMemberDto {
  @ApiProperty({ description: 'Pireon user id (see GET /users)' })
  @IsString()
  userId!: string;

  @ApiPropertyOptional({
    enum: ProjectRole,
    enumName: 'ProjectRole',
    default: ProjectRole.MEMBER,
  })
  @IsOptional()
  @IsEnum(ProjectRole)
  role: ProjectRole = ProjectRole.MEMBER;
}

// ---- Project settings -------------------------------------------------------

export class WorkflowStatusBodyDto {
  @ApiProperty({
    example: 'IN_REVIEW',
    description: 'Never change an existing id',
  })
  @Matches(SETTING_ID)
  id!: string;
  @ApiProperty({ example: 'En revisión', maxLength: 40 })
  @IsString()
  @MinLength(1)
  @MaxLength(40)
  name!: string;
  @ApiProperty({ enum: StatusCategory, enumName: 'StatusCategory' })
  @IsEnum(StatusCategory)
  category!: StatusCategory;
  @ApiProperty({ enum: SETTING_COLORS, enumName: 'SettingColor' })
  @IsIn(SETTING_COLORS)
  color!: string;
  @ApiPropertyOptional({ type: Boolean, default: false })
  @IsOptional()
  @IsBoolean()
  requiresReason = false;
  @ApiPropertyOptional({ type: Boolean, default: false })
  @IsOptional()
  @IsBoolean()
  archived = false;
}

export class StatusTransitionsBodyDto {
  @ApiProperty({ example: 'IN_QA' }) @Matches(SETTING_ID) from!: string;
  @ApiProperty({ type: [String], example: ['DONE', 'QA_FAILED'] })
  @IsArray()
  @ArrayMaxSize(50)
  @Matches(SETTING_ID, { each: true })
  to!: string[];
}

export class IssueTypeOptionBodyDto {
  @ApiProperty({ example: 'SPIKE' }) @Matches(SETTING_ID) id!: string;
  @ApiProperty({ example: 'Spike', maxLength: 40 })
  @IsString()
  @MinLength(1)
  @MaxLength(40)
  name!: string;
  @ApiProperty({ enum: TYPE_ICONS, enumName: 'TypeIcon' })
  @IsIn(TYPE_ICONS)
  icon!: string;
  @ApiProperty({ enum: SETTING_COLORS, enumName: 'SettingColor' })
  @IsIn(SETTING_COLORS)
  color!: string;
  @ApiPropertyOptional({ type: Boolean, default: false })
  @IsOptional()
  @IsBoolean()
  archived = false;
}

export class AreaOptionBodyDto {
  @ApiProperty({ example: 'DATA' }) @Matches(SETTING_ID) id!: string;
  @ApiProperty({ example: 'Datos', maxLength: 40 })
  @IsString()
  @MinLength(1)
  @MaxLength(40)
  name!: string;
  @ApiPropertyOptional({ type: Boolean, default: false })
  @IsOptional()
  @IsBoolean()
  archived = false;
}

export class ProjectSettingsBodyDto {
  @ApiProperty({
    type: [WorkflowStatusBodyDto],
    description:
      'In board order. Values cannot be removed: archive them instead.',
  })
  @IsArray()
  @ArrayMaxSize(50)
  @ValidateNested({ each: true })
  @Type(() => WorkflowStatusBodyDto)
  statuses!: WorkflowStatusBodyDto[];

  @ApiProperty({ type: [StatusTransitionsBodyDto] })
  @IsArray()
  @ArrayMaxSize(50)
  @ValidateNested({ each: true })
  @Type(() => StatusTransitionsBodyDto)
  transitions!: StatusTransitionsBodyDto[];

  @ApiProperty({ type: [IssueTypeOptionBodyDto] })
  @IsArray()
  @ArrayMaxSize(50)
  @ValidateNested({ each: true })
  @Type(() => IssueTypeOptionBodyDto)
  issueTypes!: IssueTypeOptionBodyDto[];

  @ApiProperty({ type: [AreaOptionBodyDto] })
  @IsArray()
  @ArrayMaxSize(50)
  @ValidateNested({ each: true })
  @Type(() => AreaOptionBodyDto)
  areas!: AreaOptionBodyDto[];
}

export class AnalyticsQueryDto {
  @ApiPropertyOptional({ type: Number, default: 90, minimum: 7, maximum: 365 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(7)
  @Max(365)
  days = 90;
}

export class ChangeMemberRoleDto {
  @ApiProperty({ enum: ProjectRole, enumName: 'ProjectRole' })
  @IsEnum(ProjectRole)
  role!: ProjectRole;
}

export class BoardQueryDto {
  @ApiPropertyOptional({ format: 'uuid', description: 'Only this release' })
  @IsOptional()
  @IsString()
  releaseId?: string;

  @ApiPropertyOptional({ description: 'Only this person (Pireon user id)' })
  @IsOptional()
  @IsString()
  assigneeId?: string;

  @ApiPropertyOptional({ example: 'FRONTEND', description: 'An area id' })
  @IsOptional()
  @Matches(SETTING_ID)
  area?: string;

  @ApiPropertyOptional({ type: Number, default: 50, minimum: 1, maximum: 200 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(200)
  perColumn = 50;
}

export class ActivityQueryDto {
  @ApiPropertyOptional({ format: 'uuid', description: 'Only this ticket' })
  @IsOptional()
  @IsString()
  issueId?: string;

  @ApiPropertyOptional({ type: Number, default: 50, minimum: 1, maximum: 200 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(200)
  limit = 50;

  @ApiPropertyOptional({
    format: 'date-time',
    description: 'Cursor: entries older than this date',
  })
  @IsOptional()
  @IsISO8601()
  before?: string;
}

export class PageQueryDto {
  @ApiPropertyOptional({ type: Number, default: 50, minimum: 1, maximum: 200 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(200)
  limit = 50;

  @ApiPropertyOptional({ type: Number, default: 0, minimum: 0 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  offset = 0;
}

// ---- Issues -----------------------------------------------------------------

export class MyIssuesQueryDto extends PageQueryDto {
  @ApiPropertyOptional({
    type: Boolean,
    default: true,
    description:
      'true: tickets assigned to me. false: any ticket of my projects (e.g. ?assignedToMe=false&category=QA)',
  })
  @IsOptional()
  @Transform(toBoolean)
  @IsBoolean()
  assignedToMe = true;

  @ApiPropertyOptional({
    type: [String],
    description: 'Status ids. Repeat the parameter or separate with commas',
  })
  @IsOptional()
  @Transform(toList)
  @Matches(SETTING_ID, { each: true })
  status?: string[];

  @ApiPropertyOptional({
    enum: StatusCategory,
    enumName: 'StatusCategory',
    isArray: true,
    description: 'Whatever each project calls its statuses',
  })
  @IsOptional()
  @Transform(toList)
  @IsEnum(StatusCategory, { each: true })
  category?: StatusCategory[];
}

export class UpcomingReleasesQueryDto {
  @ApiPropertyOptional({ type: Number, default: 10, minimum: 1, maximum: 50 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(50)
  limit = 10;
}

export class IssueSearchQueryDto extends PageQueryDto {
  @ApiPropertyOptional({
    type: [String],
    description: 'Status ids. Repeat the parameter or separate with commas',
  })
  @IsOptional()
  @Transform(toList)
  @Matches(SETTING_ID, { each: true })
  status?: string[];

  @ApiPropertyOptional({
    enum: StatusCategory,
    enumName: 'StatusCategory',
    isArray: true,
  })
  @IsOptional()
  @Transform(toList)
  @IsEnum(StatusCategory, { each: true })
  category?: StatusCategory[];

  @ApiPropertyOptional({ type: [String], description: 'Ticket type ids' })
  @IsOptional()
  @Transform(toList)
  @Matches(SETTING_ID, { each: true })
  type?: string[];

  @ApiPropertyOptional({ type: [String], description: 'Area ids' })
  @IsOptional()
  @Transform(toList)
  @Matches(SETTING_ID, { each: true })
  area?: string[];

  @ApiPropertyOptional({
    enum: IssuePriority,
    enumName: 'IssuePriority',
    isArray: true,
  })
  @IsOptional()
  @Transform(toList)
  @IsEnum(IssuePriority, { each: true })
  priority?: IssuePriority[];

  @ApiPropertyOptional({ description: 'Pireon user id' })
  @IsOptional()
  @IsString()
  assigneeId?: string;

  @ApiPropertyOptional({ description: 'Only tickets without assignee' })
  @IsOptional()
  @Transform(toBoolean)
  @IsBoolean()
  unassigned?: boolean;

  @ApiPropertyOptional({ format: 'uuid' })
  @IsOptional()
  @IsString()
  releaseId?: string;

  @ApiPropertyOptional({ type: [String] })
  @IsOptional()
  @Transform(toList)
  @IsString({ each: true })
  label?: string[];

  @ApiPropertyOptional({
    description: 'Only the tickets hanging from this one (id or key)',
    example: 'WEB-3',
  })
  @IsOptional()
  @IsString()
  parent?: string;

  @ApiPropertyOptional({ description: 'Matches key, title or description' })
  @IsOptional()
  @IsString()
  @MaxLength(200)
  search?: string;
}

class IssueFieldsDto {
  @ApiPropertyOptional({ type: String, nullable: true, maxLength: 50000 })
  @IsOptional()
  @IsString()
  @MaxLength(50000)
  description?: string | null;

  @ApiPropertyOptional({
    type: String,
    nullable: true,
    example: 'FRONTEND',
    description: "An area id of the project's settings",
  })
  @IsOptional()
  @Matches(SETTING_ID)
  area?: string | null;

  @ApiPropertyOptional({ enum: IssuePriority, enumName: 'IssuePriority' })
  @IsOptional()
  @IsEnum(IssuePriority)
  priority?: IssuePriority;

  @ApiPropertyOptional({ type: [String], maxItems: 20 })
  @IsOptional()
  @ArrayMaxSize(20)
  @IsString({ each: true })
  @MaxLength(40, { each: true })
  labels?: string[];

  @ApiPropertyOptional({
    type: String,
    nullable: true,
    description: 'Figma frame (https) for UI changes',
  })
  @IsOptional()
  @IsUrl({ protocols: ['https'] })
  figmaUrl?: string | null;

  @ApiPropertyOptional({
    type: Number,
    nullable: true,
    minimum: 0,
    maximum: 100,
  })
  @IsOptional()
  @IsInt()
  @Min(0)
  @Max(100)
  storyPoints?: number | null;

  @ApiPropertyOptional({ type: String, nullable: true, format: 'date' })
  @IsOptional()
  @IsISO8601()
  dueDate?: string | null;
}

export class CreateIssueDto extends IssueFieldsDto {
  @ApiProperty({
    example: 'BUG',
    description: "A ticket type id of the project's settings",
  })
  @Matches(SETTING_ID)
  type!: string;

  @ApiProperty({
    example: 'El botón de pagar no responde en Safari',
    maxLength: 255,
  })
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  title!: string;

  @ApiPropertyOptional({
    type: String,
    nullable: true,
    description: 'Pireon user id',
  })
  @IsOptional()
  @IsString()
  assigneeId?: string | null;

  @ApiPropertyOptional({ type: String, nullable: true, format: 'uuid' })
  @IsOptional()
  @IsString()
  releaseId?: string | null;

  @ApiPropertyOptional({
    type: String,
    nullable: true,
    example: 'WEB-3',
    description:
      'Epic or ticket of the same project the new one breaks down (id or key)',
  })
  @IsOptional()
  @IsString()
  parent?: string | null;
}

export class UpdateIssueDto extends IssueFieldsDto {
  @ApiPropertyOptional({ example: 'FEATURE', description: 'A ticket type id' })
  @IsOptional()
  @Matches(SETTING_ID)
  type?: string;

  @ApiPropertyOptional({ maxLength: 255 })
  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  title?: string;
}

export class ChangeStatusDto {
  @ApiProperty({
    example: 'IN_REVIEW',
    description:
      "A status id of the project's settings, among the ticket's allowedTransitions",
  })
  @Matches(SETTING_ID)
  status!: string;

  @ApiPropertyOptional({
    type: String,
    nullable: true,
    description: 'Required by statuses with requiresReason (e.g. QA_FAILED)',
  })
  @IsOptional()
  @IsString()
  @MaxLength(5000)
  reason?: string | null;
}

export class AssignIssueDto {
  @ApiProperty({
    type: String,
    nullable: true,
    description: 'Pireon user id of a project member, or null to unassign',
  })
  @ValidateIf((dto: AssignIssueDto) => dto.assigneeId !== null)
  @IsString()
  assigneeId!: string | null;
}

export class SetIssueReleaseDto {
  @ApiProperty({
    type: String,
    nullable: true,
    format: 'uuid',
    description: 'Planned release, or null to take the ticket out',
  })
  @ValidateIf((dto: SetIssueReleaseDto) => dto.releaseId !== null)
  @IsString()
  releaseId!: string | null;
}

export class SetIssueParentDto {
  @ApiProperty({
    type: String,
    nullable: true,
    example: 'WEB-3',
    description:
      'Epic or ticket of the same project (id or key), or null to take it back to the top',
  })
  @ValidateIf((dto: SetIssueParentDto) => dto.parent !== null)
  @IsString()
  parent!: string | null;
}

export class ChecklistItemBodyDto {
  @ApiProperty({ example: 'Actualizar el changelog', maxLength: 300 })
  @IsString()
  @MinLength(1)
  @MaxLength(300)
  text!: string;
}

export class UpdateChecklistItemDto {
  @ApiPropertyOptional({ maxLength: 300 })
  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(300)
  text?: string;

  @ApiPropertyOptional()
  @IsOptional()
  @IsBoolean()
  done?: boolean;
}

export class LinkIssueDto {
  @ApiProperty({ enum: IssueLinkType, enumName: 'IssueLinkType' })
  @IsEnum(IssueLinkType)
  type!: IssueLinkType;

  @ApiProperty({ example: 'API-3', description: 'Other ticket: id or key' })
  @IsString()
  @MinLength(1)
  targetIssue!: string;
}

export class LinkTypeParamDto {
  @ApiProperty({ enum: IssueLinkType, enumName: 'IssueLinkType' })
  @IsIn(Object.values(IssueLinkType))
  type!: IssueLinkType;
}

/** Multipart body of an upload; the file itself travels as `file`. */
export class AttachFileDto {
  @ApiProperty({ type: 'string', format: 'binary', description: 'The file' })
  file?: unknown;

  @ApiPropertyOptional({
    format: 'uuid',
    description: "One of the ticket's comments, to show the file under it",
  })
  @IsOptional()
  @IsUUID()
  commentId?: string;
}

export class CommentBodyDto {
  @ApiProperty({ example: 'Reproducido en Safari 17.', maxLength: 20000 })
  @IsString()
  @MinLength(1)
  @MaxLength(20000)
  body!: string;
}

// ---- Releases ---------------------------------------------------------------

export class CreateReleaseDto {
  @ApiProperty({ example: 'v1.4.0', maxLength: 60 })
  @IsString()
  @MinLength(1)
  @MaxLength(60)
  name!: string;

  @ApiPropertyOptional({ type: String, nullable: true, maxLength: 5000 })
  @IsOptional()
  @IsString()
  @MaxLength(5000)
  description?: string | null;

  @ApiPropertyOptional({
    type: String,
    nullable: true,
    format: 'date',
    example: '2026-11-14',
  })
  @IsOptional()
  @IsISO8601()
  targetDate?: string | null;
}

export class UpdateReleaseDto extends PartialType(CreateReleaseDto) {}

export class PublishReleaseDto {
  @ApiPropertyOptional({
    type: Boolean,
    default: false,
    description: 'Publish even with unfinished tickets',
  })
  @IsOptional()
  @IsBoolean()
  force = false;
}

// ---- Notifications ----------------------------------------------------------

export class MyNotificationsQueryDto {
  @ApiPropertyOptional({ default: false, description: 'Only unread ones' })
  @IsOptional()
  @Transform(toBoolean)
  @IsBoolean()
  unreadOnly = false;

  @ApiPropertyOptional({ type: Number, default: 30, minimum: 1, maximum: 100 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(100)
  limit = 30;
}

export class MarkNotificationsReadDto {
  @ApiPropertyOptional({
    type: [String],
    description: 'Omit to mark all of them',
  })
  @IsOptional()
  @IsArray()
  @ArrayMaxSize(200)
  @IsString({ each: true })
  ids?: string[];
}

export class NotificationSettingsDto {
  @ApiProperty({ description: 'Copies by e-mail' })
  @IsBoolean()
  email!: boolean;
}