#!/usr/bin/env bash
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
OUT_PATH="${1:-}"

API_CONTRACT="$ROOT/api/conversational_api_v0.json"
CONTEXT_CONTRACT="$ROOT/api/system_context_v0.json"
RUNTIME_CONTRACT="$ROOT/runtime/work_manifest_v0.json"
MANIFEST_SCHEMA="$ROOT/runtime/work_manifest_packet_v0.json"
CONTROL_LANGUAGE="$ROOT/policy/control_language_v0.json"
RUNTIME_PROFILES="$ROOT/policy/runtime_profiles_v0.json"
VSM_POLICY="$ROOT/policy/vsm_policy_v0.json"
PRODUCT_SLICES="$ROOT/configs/product_slices.json"

latest_runtime_graph() {
  find "$ROOT/runs/runtime" -name graph_state.json -type f 2>/dev/null | sort | tail -n 1
}

GRAPH_PATH="$(latest_runtime_graph)"
RECEIPT_PATH=""
SUMMARY_PATH=""
LATEST_MANIFEST_ID=""
LATEST_LANE=""
LATEST_EFFECT_COUNT=0

if [ -n "$GRAPH_PATH" ] && [ -f "$GRAPH_PATH" ]; then
  GRAPH_DIR="$(cd "$(dirname "$GRAPH_PATH")" && pwd)"
  if [ -f "$GRAPH_DIR/receipt.json" ]; then
    RECEIPT_PATH="$GRAPH_DIR/receipt.json"
  fi
  if [ -f "$GRAPH_DIR/summary.json" ]; then
    SUMMARY_PATH="$GRAPH_DIR/summary.json"
  fi
  LATEST_MANIFEST_ID="$(jq -r '.manifest_id // ""' "$GRAPH_PATH")"
  LATEST_LANE="$(jq -r '.lane // ""' "$GRAPH_PATH")"
  LATEST_EFFECT_COUNT="$(jq -r '(.effects // []) | length' "$GRAPH_PATH")"
fi

build_context() {
  jq -n \
    --slurpfile api "$API_CONTRACT" \
    --slurpfile context "$CONTEXT_CONTRACT" \
    --slurpfile runtime "$RUNTIME_CONTRACT" \
    --slurpfile manifest "$MANIFEST_SCHEMA" \
    --slurpfile control "$CONTROL_LANGUAGE" \
    --slurpfile profiles "$RUNTIME_PROFILES" \
    --slurpfile vsm "$VSM_POLICY" \
    --slurpfile slices "$PRODUCT_SLICES" \
    --arg generated_at "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
    --arg graph_path "$GRAPH_PATH" \
    --arg receipt_path "$RECEIPT_PATH" \
    --arg summary_path "$SUMMARY_PATH" \
    --arg latest_manifest_id "$LATEST_MANIFEST_ID" \
    --arg latest_lane "$LATEST_LANE" \
    --argjson latest_effect_count "$LATEST_EFFECT_COUNT" \
    '{
      version:"system_context_v0",
      generated_at:$generated_at,
      one_liner:$context[0].one_liner,
      entrypoint:{
        api:"POST /turn",
        cli:"bvtctl",
        contract_ref:"api/conversational_api_v0.json",
        why:"all agent interaction should start from one front door before widening into internal slices"
      },
      current_position:{
        slice_id:$vsm[0].identity.entry_slice,
        default_profile:$vsm[0].identity.default_profile,
        lineage_view:"operator_lineage",
        role:"single front-door operator over the whole system"
      },
      lineage:{
        views:$vsm[0].lineage_views,
        slice_map:($slices[0].slices | map({
          id,
          path,
          purpose,
          upstream_reference
        }))
      },
      taxonomy:$vsm[0].taxonomy,
      policy:{
        vsm:$vsm[0],
        control_language:{
          product_read:$control[0].product_read,
          meta_modes:$control[0].meta_modes,
          bits:$control[0].bits,
          vectors:$control[0].vectors,
          tensors:$control[0].tensors,
          invariants:$control[0].invariants
        },
        runtime_profiles:$profiles[0].profiles
      },
      runtime_contract:{
        one_liner:$runtime[0].one_liner,
        contract:$runtime[0].runtime_contract,
        acceptance_bar:$runtime[0].acceptance_bar
      },
      payload_templates:{
        turn_request:{
          endpoint:"POST /turn",
          auto_hydrated_fields:[
            "system_context",
            "policy_context",
            "lineage_context"
          ],
          user_supplied_fields:["user_input"],
          optional_state_fields:$api[0].request_contract.fields,
          template:(
            $api[0].request_contract.fields
            | map({key:., value:null})
            | from_entries
            | .user_input = "<user_input>"
          )
        },
        turn_response_fields:$api[0].response_contract.fields,
        work_manifest:{
          schema_title:$manifest[0].title,
          required_fields:$manifest[0].required,
          template:{
            version:"work_manifest_v0",
            manifest_id:"<manifest_id>",
            goal:"<goal>",
            lane:"<lane>",
            execution_gate:false,
            receipt_required:true,
            actions:[
              {
                type:"write_file",
                path:"<path>",
                content:"<content>"
              }
            ]
          }
        }
      },
      latest_runtime_state:{
        graph_state_path:(if $graph_path == "" then null else $graph_path end),
        receipt_path:(if $receipt_path == "" then null else $receipt_path end),
        summary_path:(if $summary_path == "" then null else $summary_path end),
        latest_manifest_id:(if $latest_manifest_id == "" then null else $latest_manifest_id end),
        latest_lane:(if $latest_lane == "" then null else $latest_lane end),
        latest_effect_count:$latest_effect_count
      },
      agent_bootstrap:{
        trust_order:[
          "graph_state",
          "receipts",
          "policy",
          "runtime_contract",
          "docs"
        ],
        first_move:"read this packet, stay inside POST /turn, and escalate to manifests only when policy opens the gate",
        promise:$vsm[0].identity.operator_promise
      }
    }'
}

if [ -n "$OUT_PATH" ]; then
  mkdir -p "$(dirname "$OUT_PATH")"
  build_context > "$OUT_PATH"
  printf '%s\n' "$OUT_PATH"
else
  build_context
fi