import { Type } from 'class-transformer';
import {
  Allow,
  IsArray,
  IsBoolean,
  IsDateString,
  IsIn,
  IsInt,
  IsObject,
  IsOptional,
  IsString,
  Max,
  MaxLength,
  Min,
  MinLength,
  ValidateIf,
} from 'class-validator';
import type { ActivityFieldDef, ActivityFieldValues, ActivityTypeIcon } from '@mento/shared';
import { ACTIVITY_TYPE_ICONS } from '@mento/shared';

/** تکه‌های JSON از ایمپورت مرورگرگرا */
export class ImportActivityRowsDto {
  @IsArray()
  @Allow()
  rows!: Array<Record<string, string>>;

  @Type(() => Number)
  @IsInt()
  @Min(0)
  offset!: number;

  @Type(() => Number)
  @IsInt()
  @Min(0)
  total!: number;

  @IsOptional()
  @IsString()
  sessionId?: string;
}

const ACTIVITY_TYPES = ['call', 'meeting', 'task', 'note'] as const;
const ACTIVITY_STATUSES = ['open', 'done', 'canceled'] as const;
const ACTIVITY_PRIORITIES = ['very_low', 'low', 'medium', 'high', 'very_high'] as const;
const ACTIVITY_FILTERS = ['today', 'overdue', 'upcoming', 'done', 'all'] as const;

export class ListActivitiesQueryDto {
  @IsOptional()
  @IsIn(ACTIVITY_FILTERS)
  filter?: (typeof ACTIVITY_FILTERS)[number] = 'today';

  @IsOptional()
  @IsString()
  q?: string;

  @IsOptional()
  @IsIn(['mine', 'team'])
  desk?: 'mine' | 'team';

  @IsOptional()
  @IsIn(ACTIVITY_TYPES)
  type?: (typeof ACTIVITY_TYPES)[number];

  @IsOptional()
  @IsIn(ACTIVITY_STATUSES)
  status?: (typeof ACTIVITY_STATUSES)[number];

  @IsOptional()
  @IsString()
  assigneeId?: string;

  /** نوع فعالیت (تعریف‌شده در سازمان) */
  @IsOptional()
  @IsString()
  typeDefId?: string;

  /** شناسهٔ مرحله یا 'all' — حالت تب/کانبان مراحل */
  @IsOptional()
  @IsString()
  stageId?: string;

  /** گروه فعالیت؛ خالی = همهٔ گروه‌ها (در شمارش ستون‌ها = گروه پیش‌فرض) */
  @IsOptional()
  @IsString()
  boardId?: string;

  @IsOptional()
  @IsString()
  personId?: string;

  @IsOptional()
  @IsString()
  companyId?: string;

  @IsOptional()
  @IsString()
  dealId?: string;

  @IsOptional()
  @IsString()
  leadId?: string;

  /** Inclusive start (ISO). When set with/without filter, restricts dueAt. */
  @IsOptional()
  @IsDateString()
  from?: string;

  /** Exclusive end (ISO). */
  @IsOptional()
  @IsDateString()
  to?: string;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  page?: number = 1;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(200)
  limit?: number = 50;
}

const STAGE_COLORS = ['green', 'orange', 'purple', 'blue', 'rose', 'slate'] as const;

export class CreateActivityBoardDto {
  @IsString()
  @MinLength(2)
  @MaxLength(80)
  name!: string;
}

export class UpdateActivityBoardDto {
  @IsOptional()
  @IsString()
  @MinLength(2)
  @MaxLength(80)
  name?: string;
}

export class ListActivityStagesQueryDto {
  @IsOptional()
  @IsString()
  boardId?: string;
}

export class CreateActivityStageDto {
  /** خالی = گروه پیش‌فرض */
  @IsOptional()
  @IsString()
  boardId?: string;

  @IsString()
  @MinLength(1)
  @MaxLength(80)
  name!: string;

  @IsOptional()
  @IsIn(STAGE_COLORS)
  color?: (typeof STAGE_COLORS)[number];

  @IsOptional()
  @IsIn(ACTIVITY_STATUSES)
  kind?: (typeof ACTIVITY_STATUSES)[number];
}

export class UpdateActivityStageDto {
  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(80)
  name?: string;

  @IsOptional()
  @IsIn(STAGE_COLORS)
  color?: (typeof STAGE_COLORS)[number];

  @IsOptional()
  @IsIn(ACTIVITY_STATUSES)
  kind?: (typeof ACTIVITY_STATUSES)[number];
}

export class ReorderActivityStagesDto {
  @IsArray()
  @IsString({ each: true })
  stageIds!: string[];
}

export class MoveActivityStageDto {
  @IsString()
  stageId!: string;
}

/** محتوای fields در سرویس بر اساس تعریف نوع اعتبارسنجی می‌شود */
export class CreateActivityTypeDto {
  @IsString()
  @MinLength(1)
  @MaxLength(60)
  name!: string;

  @IsOptional()
  @IsIn(ACTIVITY_TYPES)
  baseType?: (typeof ACTIVITY_TYPES)[number];

  @IsOptional()
  @IsIn(ACTIVITY_TYPE_ICONS)
  icon?: ActivityTypeIcon;

  @IsOptional()
  @IsIn(STAGE_COLORS)
  color?: (typeof STAGE_COLORS)[number];

  @IsOptional()
  @IsArray()
  @Allow()
  fields?: ActivityFieldDef[];
}

export class UpdateActivityTypeDto {
  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(60)
  name?: string;

  @IsOptional()
  @IsIn(ACTIVITY_TYPES)
  baseType?: (typeof ACTIVITY_TYPES)[number];

  @IsOptional()
  @IsIn(ACTIVITY_TYPE_ICONS)
  icon?: ActivityTypeIcon;

  @IsOptional()
  @IsIn(STAGE_COLORS)
  color?: (typeof STAGE_COLORS)[number];

  @IsOptional()
  @IsArray()
  @Allow()
  fields?: ActivityFieldDef[];

  @IsOptional()
  @IsBoolean()
  isActive?: boolean;
}

export class ReorderActivityTypesDto {
  @IsArray()
  @IsString({ each: true })
  typeIds!: string[];
}

export class CreateActivityDto {
  @IsString()
  @MinLength(2)
  @MaxLength(200)
  title!: string;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  boardId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  stageId?: string | null;

  @IsOptional()
  @IsIn(ACTIVITY_TYPES)
  type?: (typeof ACTIVITY_TYPES)[number];

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  typeDefId?: string | null;

  @IsOptional()
  @IsObject()
  fields?: ActivityFieldValues;

  @IsOptional()
  @IsIn(ACTIVITY_PRIORITIES)
  priority?: (typeof ACTIVITY_PRIORITIES)[number];

  @IsOptional()
  @IsString()
  @MaxLength(2000)
  description?: string;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsDateString()
  dueAt?: string | null;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(24 * 60)
  durationMinutes?: number | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsDateString()
  reminderAt?: string | null;

  @IsOptional()
  @IsBoolean()
  reminderNotifyApp?: boolean;

  @IsOptional()
  @IsBoolean()
  reminderNotifySms?: boolean;

  @IsOptional()
  @IsArray()
  @IsString({ each: true })
  tags?: string[];

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  personId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  companyId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  dealId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  assigneeId?: string | null;

  @IsOptional()
  @IsArray()
  @IsString({ each: true })
  assigneeIds?: string[];
}

export class UpdateActivityDto {
  @IsOptional()
  @IsString()
  @MinLength(2)
  @MaxLength(200)
  title?: string;

  /** null/خالی = گروه پیش‌فرض */
  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  boardId?: string | null;

  @IsOptional()
  @IsIn(ACTIVITY_TYPES)
  type?: (typeof ACTIVITY_TYPES)[number];

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  typeDefId?: string | null;

  @IsOptional()
  @IsObject()
  fields?: ActivityFieldValues;

  @IsOptional()
  @IsIn(ACTIVITY_STATUSES)
  status?: (typeof ACTIVITY_STATUSES)[number];

  @IsOptional()
  @IsIn(ACTIVITY_PRIORITIES)
  priority?: (typeof ACTIVITY_PRIORITIES)[number];

  @IsOptional()
  @IsString()
  @MaxLength(2000)
  description?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsDateString()
  dueAt?: string | null;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(24 * 60)
  durationMinutes?: number | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsDateString()
  reminderAt?: string | null;

  @IsOptional()
  @IsBoolean()
  reminderNotifyApp?: boolean;

  @IsOptional()
  @IsBoolean()
  reminderNotifySms?: boolean;

  @IsOptional()
  @IsArray()
  @IsString({ each: true })
  tags?: string[];

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  personId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  companyId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  dealId?: string | null;

  @IsOptional()
  @ValidateIf((_, v) => v !== '' && v != null)
  @IsString()
  assigneeId?: string | null;

  @IsOptional()
  @IsArray()
  @IsString({ each: true })
  assigneeIds?: string[];
}