import { RAIN_SKILL_NAME, isRainModeMessage } from '../chat-skills.mjs';
import { loadRainMeinputRecords, formatMeinputFullBlock } from './meinput-full.mjs';
import { runRainLlmAnalysis, buildRainGooseHandoffText, stripRainSkillPrefix } from './llm-analysis.mjs';
import { resolveRainTimeRange, formatRainTimeRangeLabel } from './time-range.mjs';

export { RAIN_SKILL_NAME, isRainModeMessage };
export { resolveRainTimeRange, formatRainTimeRangeLabel, RAIN_DEFAULT_DAYS } from './time-range.mjs';
export { formatMeinputFullBlock, loadRainMeinputRecords } from './meinput-full.mjs';
export { runRainLlmAnalysis, buildRainGooseHandoffText, stripRainSkillPrefix } from './llm-analysis.mjs';

/**
 * @param {{
 *   llmProviderService: object,
 *   userId: string,
 *   userMessage: object,
 * }} input
 * @returns {Promise<
 *   | { phase: 'clarify', userReply: string, rainMeta: object }
 *   | { phase: 'goose', gooseHandoffText: string, userReply: string, rainMeta: object }
 * >}
 */
export async function executeRainPipeline(input) {
  const displayText =
    input.userMessage?.metadata?.displayText ??
    stripRainSkillPrefix(
      Array.isArray(input.userMessage?.content)
        ? input.userMessage.content
            .filter((item) => item?.type === 'text')
            .map((item) => item.text ?? '')
            .join('\n')
        : String(input.userMessage?.content ?? ''),
    );

  const timeResolution = resolveRainTimeRange(displayText);
  if (timeResolution.needsClarification) {
    return {
      phase: 'clarify',
      userReply: timeResolution.clarificationQuestion,
      rainMeta: { timeResolution, recordCount: 0 },
    };
  }

  const timeRangeLabel = formatRainTimeRangeLabel(timeResolution.range, timeResolution);
  const { records } = await loadRainMeinputRecords({
    userId: input.userId,
    range: timeResolution.range,
  });
  const meinputBlock = formatMeinputFullBlock(records, {
    range: timeResolution.range,
    label: timeResolution.label,
    source: timeResolution.source,
  });

  const analysis = await runRainLlmAnalysis({
    llmProviderService: input.llmProviderService,
    userQuery: displayText,
    meinputBlock,
    timeRangeLabel,
    recordCount: records.length,
  });

  if (analysis.needs_clarification && analysis.clarification_question) {
    return {
      phase: 'clarify',
      userReply: analysis.clarification_question,
      rainMeta: { timeResolution, recordCount: records.length, analysis },
    };
  }

  const gooseHandoffText = buildRainGooseHandoffText({
    userQuery: displayText,
    timeRangeLabel,
    recordCount: records.length,
    analysis: analysis.meinput_analysis,
    userGoal: analysis.user_goal,
    suggestedNextSteps: analysis.suggested_next_steps,
  });

  return {
    phase: 'goose',
    gooseHandoffText,
    userReply: analysis.user_reply,
    rainMeta: {
      timeResolution,
      recordCount: records.length,
      analysis,
      meinputBlockChars: meinputBlock.length,
    },
  };
}