import type {
  PromptTemplate,
  PromptTemplateCreateRequest,
} from '../../service/content-generator/content-generator.interface';

export interface PromptTemplateDraft {
  template_id: string | null;
  name: string;
  description: string;
  language: string;
  titles_prompt: string;
  descriptions_prompt: string;
  tags_prompt: string;
  faq_prompt: string;
  tone: string;
  custom_tone: string;
  temperature: string;
}

export const EMPTY_PROMPT_TEMPLATE_DRAFT: PromptTemplateDraft = {
  template_id: null,
  name: '',
  description: '',
  language: 'en',
  titles_prompt: '',
  descriptions_prompt: '',
  tags_prompt: '',
  faq_prompt: '',
  tone: 'professional',
  custom_tone: '',
  temperature: '0.7',
};

export function toPromptTemplateDraft(
  template: PromptTemplate
): PromptTemplateDraft {
  return {
    template_id: template.template_id,
    name: template.name,
    description: template.description ?? '',
    language: template.language ?? 'en',
    titles_prompt: template.titles_prompt ?? '',
    descriptions_prompt: template.descriptions_prompt ?? '',
    tags_prompt: template.tags_prompt ?? '',
    faq_prompt: template.faq_prompt ?? '',
    tone: template.tone || 'professional',
    custom_tone: template.custom_tone ?? '',
    temperature: String(template.temperature ?? 0.7),
  };
}

function parseTemperature(raw: string): number {
  const parsed = Number(raw);
  if (!Number.isFinite(parsed)) return 0.7;
  if (parsed < 0.1) return 0.1;
  if (parsed > 1.0) return 1.0;
  return parsed;
}

export function toTemplatePayload(
  draft: PromptTemplateDraft
): PromptTemplateCreateRequest {
  return {
    name: draft.name.trim(),
    description: draft.description,
    language: draft.language || 'en',
    titles_prompt: draft.titles_prompt,
    descriptions_prompt: draft.descriptions_prompt,
    tags_prompt: draft.tags_prompt,
    faq_prompt: draft.faq_prompt,
    tone: draft.tone || 'professional',
    custom_tone: draft.tone === 'custom' ? draft.custom_tone : '',
    temperature: parseTemperature(draft.temperature),
  };
}