/**
 * SDK Prompts Module
 * Generates prompts for the Claude Agent SDK memory worker
 */

import { logger } from '../utils/logger.js';
import type { ModeConfig } from '../services/domain/types.js';

export interface Observation {
  id: number;
  tool_name: string;
  tool_input: string;
  tool_output: string;
  created_at_epoch: number;
  cwd?: string;
}

export interface SDKSession {
  id: number;
  memory_session_id: string | null;
  project: string;
  user_prompt: string;
  last_assistant_message?: string;
}

/**
 * Build initial prompt to initialize the SDK agent
 */
export function buildInitPrompt(project: string, sessionId: string, userPrompt: string, mode: ModeConfig): string {
  return `${mode.prompts.system_identity}

<observed_from_primary_session>
  <user_request>${userPrompt}</user_request>
  <requested_at>${new Date().toISOString().split('T')[0]}</requested_at>
</observed_from_primary_session>

${mode.prompts.observer_role}

${mode.prompts.spatial_awareness}

${mode.prompts.recording_focus}

${mode.prompts.skip_guidance}

${mode.prompts.output_format_header}

\`\`\`xml
<observation>
  <type>[ ${mode.observation_types.map(t => t.id).join(' | ')} ]</type>
  <!--
    ${mode.prompts.type_guidance}
  -->
  <title>${mode.prompts.xml_title_placeholder}</title>
  <subtitle>${mode.prompts.xml_subtitle_placeholder}</subtitle>
  <facts>
    <fact>${mode.prompts.xml_fact_placeholder}</fact>
    <fact>${mode.prompts.xml_fact_placeholder}</fact>
    <fact>${mode.prompts.xml_fact_placeholder}</fact>
  </facts>
  <!--
    ${mode.prompts.field_guidance}
  -->
  <narrative>${mode.prompts.xml_narrative_placeholder}</narrative>
  <concepts>
    <concept>${mode.prompts.xml_concept_placeholder}</concept>
    <concept>${mode.prompts.xml_concept_placeholder}</concept>
  </concepts>
  <!--
    ${mode.prompts.concept_guidance}
  -->
  <files_read>
    <file>${mode.prompts.xml_file_placeholder}</file>
    <file>${mode.prompts.xml_file_placeholder}</file>
  </files_read>
  <files_modified>
    <file>${mode.prompts.xml_file_placeholder}</file>
    <file>${mode.prompts.xml_file_placeholder}</file>
  </files_modified>
</observation>
\`\`\`
${mode.prompts.format_examples}

${mode.prompts.footer}

${mode.prompts.header_memory_start}`;
}

/**
 * Build prompt to send tool observation to SDK agent
 */
export function buildObservationPrompt(obs: Observation): string {
  // Safely parse tool_input and tool_output - they're already JSON strings
  let toolInput: any;
  let toolOutput: any;

  try {
    toolInput = typeof obs.tool_input === 'string' ? JSON.parse(obs.tool_input) : obs.tool_input;
  } catch (error) {
    logger.debug('SDK', 'Tool input is plain string, using as-is', {
      toolName: obs.tool_name
    }, error as Error);
    toolInput = obs.tool_input;
  }

  try {
    toolOutput = typeof obs.tool_output === 'string' ? JSON.parse(obs.tool_output) : obs.tool_output;
  } catch (error) {
    logger.debug('SDK', 'Tool output is plain string, using as-is', {
      toolName: obs.tool_name
    }, error as Error);
    toolOutput = obs.tool_output;
  }

  return `<observed_from_primary_session>
  <what_happened>${obs.tool_name}</what_happened>
  <occurred_at>${new Date(obs.created_at_epoch).toISOString()}</occurred_at>${obs.cwd ? `\n  <working_directory>${obs.cwd}</working_directory>` : ''}
  <parameters>${JSON.stringify(toolInput, null, 2)}</parameters>
  <outcome>${JSON.stringify(toolOutput, null, 2)}</outcome>
</observed_from_primary_session>

Return either one or more <observation>...</observation> blocks, or an empty response if this tool use should be skipped.
Concrete debugging findings from logs, queue state, database rows, session routing, or code-path inspection count as durable discoveries and should be recorded.
Never reply with prose such as "Skipping", "No substantive tool executions", or any explanation outside XML. Non-XML text is discarded.`;
}

/**
 * Build prompt to generate progress summary
 */
export function buildSummaryPrompt(session: SDKSession, mode: ModeConfig): string {
  const lastAssistantMessage = session.last_assistant_message || (() => {
    logger.error('SDK', 'Missing last_assistant_message in session for summary prompt', {
      sessionId: session.id
    });
    return '';
  })();

  return `--- MODE SWITCH: PROGRESS SUMMARY ---
Do NOT output <observation> tags. This is a summary request, not an observation request.
Your response MUST use <summary> tags ONLY. Any <observation> output will be discarded.

${mode.prompts.header_summary_checkpoint}
${mode.prompts.summary_instruction}

${mode.prompts.summary_context_label}
${lastAssistantMessage}

${mode.prompts.summary_format_instruction}
<summary>
  <request>${mode.prompts.xml_summary_request_placeholder}</request>
  <investigated>${mode.prompts.xml_summary_investigated_placeholder}</investigated>
  <learned>${mode.prompts.xml_summary_learned_placeholder}</learned>
  <completed>${mode.prompts.xml_summary_completed_placeholder}</completed>
  <next_steps>${mode.prompts.xml_summary_next_steps_placeholder}</next_steps>
  <notes>${mode.prompts.xml_summary_notes_placeholder}</notes>
</summary>

${mode.prompts.summary_footer}`;
}

/**
 * Build prompt for continuation of existing session
 *
 * CRITICAL: Why contentSessionId Parameter is Required
 * ====================================================
 * This function receives contentSessionId from SDKAgent.ts, which comes from:
 * - SessionManager.initializeSession (fetched from database)
 * - SessionStore.createSDKSession (stored by new-hook.ts)
 * - new-hook.ts receives it from Claude Code's hook context
 *
 * The contentSessionId is the SAME session_id used by:
 * - NEW hook (to create/fetch session)
 * - SAVE hook (to store observations)
 * - This continuation prompt (to maintain session context)
 *
 * This is how everything stays connected - ONE session_id threading through
 * all hooks and prompts in the same conversation.
 *
 * Called when: promptNumber > 1 (see SDKAgent.ts line 150)
 * First prompt: Uses buildInitPrompt instead (promptNumber === 1)
 */
export function buildContinuationPrompt(userPrompt: string, promptNumber: number, contentSessionId: string, mode: ModeConfig): string {
  return `${mode.prompts.continuation_greeting}

<observed_from_primary_session>
  <user_request>${userPrompt}</user_request>
  <requested_at>${new Date().toISOString().split('T')[0]}</requested_at>
</observed_from_primary_session>

${mode.prompts.system_identity}

${mode.prompts.observer_role}

${mode.prompts.spatial_awareness}

${mode.prompts.recording_focus}

${mode.prompts.skip_guidance}

${mode.prompts.continuation_instruction}

${mode.prompts.output_format_header}

\`\`\`xml
<observation>
  <type>[ ${mode.observation_types.map(t => t.id).join(' | ')} ]</type>
  <!--
    ${mode.prompts.type_guidance}
  -->
  <title>${mode.prompts.xml_title_placeholder}</title>
  <subtitle>${mode.prompts.xml_subtitle_placeholder}</subtitle>
  <facts>
    <fact>${mode.prompts.xml_fact_placeholder}</fact>
    <fact>${mode.prompts.xml_fact_placeholder}</fact>
    <fact>${mode.prompts.xml_fact_placeholder}</fact>
  </facts>
  <!--
    ${mode.prompts.field_guidance}
  -->
  <narrative>${mode.prompts.xml_narrative_placeholder}</narrative>
  <concepts>
    <concept>${mode.prompts.xml_concept_placeholder}</concept>
    <concept>${mode.prompts.xml_concept_placeholder}</concept>
  </concepts>
  <!--
    ${mode.prompts.concept_guidance}
  -->
  <files_read>
    <file>${mode.prompts.xml_file_placeholder}</file>
    <file>${mode.prompts.xml_file_placeholder}</file>
  </files_read>
  <files_modified>
    <file>${mode.prompts.xml_file_placeholder}</file>
    <file>${mode.prompts.xml_file_placeholder}</file>
  </files_modified>
</observation>
\`\`\`
${mode.prompts.format_examples}

${mode.prompts.footer}

${mode.prompts.header_memory_continued}`;
}