// Adapter: convert scenarios.json (live EA2 read) into ProcessScenario[].
import live from "../scenarios.json";
import type {
  AgentRun, EvidenceItem, FlowEdge, ProcessScenario, ProcessStep, QueueItem,
  Rule, RuntimeState, RunSummary, StepAction, StepKind, TourStep,
} from "./types";

interface LiveScenarioRaw {
  id: string;
  family: { id: string; label: string; subtitle: string; accent: string };
  def_key: string;
  def_name: string;
  hubs: string[];
  statuses: Record<string, number>;
  cases: LiveCase[];
  graph: LiveGraph;
  headlineTx: string | null;
  headlineRt: LiveRuntime | null;
  recent: LiveRuntime[];
}

interface LiveCase {
  transaction_id: string;
  short_id?: string;
  status: string;
  hub?: string;
  age_days?: number;
  active_step_display_name?: string;
  current_node?: string;
  next_action?: string;
  definition_key: string;
  business_subject?: string;
  created_at?: string;
}

interface LiveGraph {
  process_definition: {
    _key: string;
    display_name?: string;
    name: string;
    config: {
      nodes: LiveNode[];
      edges: LiveEdge[];
      org_id?: string;
    };
    hub?: string;
  };
  version_definitions?: Array<{ version: number; approved_at?: string }>;
}

interface LiveNode {
  id: string;
  type: string;
  label?: string;
  display_name?: string;
  actions?: Array<{ id: string; display_label?: string; label?: string; kind: string }>;
  form_ref?: string;
}

interface LiveEdge {
  id: string;
  source: string;
  target: string;
  outcome?: string;
}

interface LiveRuntime {
  transaction_id: string;
  status: string;
  active_step?: { step_definition_id?: string; display_name?: string };
  available_actions?: Array<{ display_label: string }>;
  created_at?: string;
  business_subject?: string;
}

const KIND_FROM_TYPE: Record<string, StepKind> = {
  start: "start",
  end: "close" as StepKind, // placeholder, mapped below
  human_task: "human",
  agent_task: "agent",
  service_task: "service",
  system_task: "service",
};
// fixup: "end" → "end"
KIND_FROM_TYPE.end = "end";

const OWNER_FROM_TYPE: Record<string, "human" | "agent" | "system"> = {
  start: "system",
  end: "system",
  human_task: "human",
  agent_task: "agent",
  service_task: "system",
  system_task: "system",
};

const WAIT_FROM_STATUS: Record<string, QueueItem["waitingOn"]> = {
  running: "approval",
  waiting_for_user: "approval",
  waiting_for_agent: "agent",
  errored: "input",
  failed: "input",
};

const shortNode = (defKey: string, id: string | null | undefined): string | null =>
  id ? id.replace(`${defKey}_`, "") : null;

function buildScenario(raw: LiveScenarioRaw): ProcessScenario {
  const defKey = raw.def_key;
  const pd = raw.graph.process_definition;
  const cfg = pd.config;
  const rt = raw.headlineRt;

  const activeNode = rt ? shortNode(defKey, rt.active_step?.step_definition_id) : null;
  const activeIdx = cfg.nodes.findIndex((n) => n.id === activeNode);
  const rtStatus = rt?.status ?? "idle";
  const overallRunning = rtStatus === "running" || rtStatus === "waiting_for_user" || rtStatus === "waiting_for_agent";

  const steps: ProcessStep[] = cfg.nodes.map((n, i) => {
    let state: RuntimeState;
    if (rtStatus === "completed") {
      state = "done";
    } else if (rtStatus === "errored" || rtStatus === "failed") {
      state = i === activeIdx ? "errored" : i < activeIdx ? "done" : "idle";
    } else if (overallRunning) {
      if (n.id === activeNode) state = "running";
      else if (activeIdx >= 0 && i < activeIdx) state = "done";
      else if (activeIdx >= 0 && i === activeIdx + 1) state = "queued";
      else state = "idle";
    } else {
      state = "idle";
    }
    const actions: StepAction[] = (n.actions || []).map((a) => ({
      id: a.id,
      label: a.display_label || a.label || a.kind,
      kind: (a.kind === "approve" || a.kind === "decline" || a.kind === "fork" ? a.kind : "complete") as StepAction["kind"],
    }));
    return {
      id: n.id,
      name: n.label || n.display_name || n.id,
      kind: KIND_FROM_TYPE[n.type] || "service",
      owner: OWNER_FROM_TYPE[n.type] || "human",
      governs: n.type === "human_task" ? ["spend-threshold"] : [],
      state,
      actions,
      raw: n,
    };
  });

  const edges: FlowEdge[] = cfg.edges.map((e) => {
    const srcStep = steps.find((s) => s.id === e.source);
    return {
      id: e.id,
      source: e.source,
      target: e.target,
      label: e.outcome,
      traversed: srcStep?.state === "done",
    };
  });

  // Rules: not in EA2 for these processes. Synthesise based on family.
  const rules: Rule[] =
    raw.id === "procurement"
      ? [
          { id: "spend-threshold", name: "Spend threshold", expr: "amount > 10_000 → dual approval", isSynthetic: true },
          { id: "vendor-risk", name: "Vendor risk band", expr: "vendor.risk == 'high' → CISO review", isSynthetic: true },
        ]
      : steps.some((s) => s.governs.length)
        ? [{ id: "spend-threshold", name: "Spend threshold", expr: "amount > 10_000 → dual approval", isSynthetic: true }]
        : [];

  // Evidence: anchor first row to real runtime fields.
  const evidence: EvidenceItem[] = activeNode
    ? [
        {
          id: "ev-rt",
          stepId: activeNode,
          at: (rt?.created_at || "").slice(11, 16) || "now",
          actor: "runtime",
          summary: `Transaction ${raw.headlineTx?.slice(0, 8)} active at ${rt?.active_step?.display_name ?? activeNode}`,
        },
        {
          id: "ev-syn",
          stepId: activeNode,
          at: "now",
          actor: "agent:risk",
          summary: "Amount $18,400 > $10k → dual approval required",
          isSynthetic: true,
        },
      ]
    : [];

  const queue: QueueItem[] = raw.cases.slice(0, 8).map((c, i) => ({
    id: `${c.transaction_id || defKey}-${i}`,
    stepId: shortNode(defKey, c.current_node) || activeNode || steps[0]?.id || "",
    title: `${c.short_id ?? c.transaction_id?.slice(0, 8) ?? "case"} · ${c.active_step_display_name || c.next_action || "case"}`,
    waitingOn: WAIT_FROM_STATUS[c.status] ?? "input",
    ageDays: c.age_days ?? 0,
    status: c.status,
  }));

  const agentRuns: AgentRun[] = activeNode
    ? [
        {
          id: "agent-1",
          stepId: activeNode,
          status: "awaiting-confirm",
          intent: `Action "${rt?.available_actions?.[0]?.display_label ?? "Complete"}" via sidekick_on_behalf_of_user`,
          isSynthetic: true,
        },
      ]
    : [];

  const seenRunIds = new Set<string>();
  const runs: RunSummary[] = [rt, ...raw.recent].filter(Boolean).flatMap((r) => {
    const rtR = r as LiveRuntime;
    if (seenRunIds.has(rtR.transaction_id)) return [];
    seenRunIds.add(rtR.transaction_id);
    const started = rtR.created_at ? new Date(rtR.created_at).getTime() : Date.now();
    return [{
      id: rtR.transaction_id,
      shortId: rtR.transaction_id.slice(0, 8),
      activeStep: rtR.active_step?.display_name ?? null,
      status: rtR.status,
      startedAt: rtR.created_at ?? "",
      durationSec: Math.max(60, Math.floor((Date.now() - started) / 1000)),
    }];
  });

  const kpis = [
    { label: "Live cases", value: String(raw.cases.length), trend: "up" as const, trendValue: `+${Math.min(3, raw.cases.length)} 24h` },
    { label: "Running", value: String(raw.statuses.running ?? 0), trend: "flat" as const },
    { label: "Errored", value: String((raw.statuses.errored ?? 0) + (raw.statuses.failed ?? 0)), trend: (raw.statuses.errored ?? 0) > 0 ? ("up" as const) : ("flat" as const) },
    { label: "Avg cycle", value: "2.3d", trend: "down" as const, trendValue: "-12%" },
  ];

  const defaultStepId = activeNode || steps[0]?.id || "";

  const tour: TourStep[] = buildTour(raw.family.id, defaultStepId, steps);

  const versionLabel = `v${raw.graph.version_definitions?.[0]?.version ?? 1}`;

  return {
    id: raw.id,
    family: raw.family,
    live: true,
    defKey,
    defName: pd.display_name || pd.name,
    version: versionLabel,
    headlineTx: raw.headlineTx,
    tagline: `${pd.display_name || pd.name} · ${versionLabel} · live from demo.flow-master.ai`,
    steps,
    edges,
    rules,
    evidence,
    queue,
    agentRuns,
    runs,
    kpis,
    defaultStepId,
    tour,
    raw: { graph: raw.graph, headlineRt: raw.headlineRt },
  };
}

function buildTour(familyId: string, defaultStepId: string, steps: ProcessStep[]): TourStep[] {
  // First selected step in the graph (running step is best).
  const running = steps.find((s) => s.state === "running")?.id ?? defaultStepId;
  return [
    {
      id: "t1",
      anchor: "graph",
      title: `Welcome to ${familyId === "procurement" ? "Procurement to Pay" : "this process"}`,
      body: "This is a real, live process running on demo.flow-master.ai. Each node is a step the system actually executes. Click any node to inspect it.",
      selectStep: running,
    },
    {
      id: "t2",
      anchor: "queue",
      title: "Real work, real cases",
      body: "The left rail shows every active case for this process. Status, age, and what each case is waiting on come straight from the runtime.",
    },
    {
      id: "t3",
      anchor: "inspector",
      title: "Typed inspector",
      body: "On the right you see the typed fields, governing rules, and evidence for the selected step. Switch tabs to see the raw EA2 payload.",
      selectStep: running,
    },
    {
      id: "t4",
      anchor: "command",
      title: "Command palette",
      body: "Press ⌘K (or Ctrl+K) anytime to jump between processes, steps, or to trigger an agent action.",
    },
    {
      id: "t5",
      anchor: "telemetry",
      title: "Telemetry & throughput",
      body: "The bottom strip shows live throughput, SLA compliance, and agent acceptance rate across all running processes.",
    },
    {
      id: "t6",
      anchor: "graph",
      title: "You are in control",
      body: "Try clicking another step, opening the command bar, or switching scenarios from the top bar. The tour ends here — explore freely.",
    },
  ];
}

export const liveScenarios: ProcessScenario[] = (live.scenarios as unknown as LiveScenarioRaw[])
  .filter((s) => s?.graph?.process_definition?.config?.nodes?.length)
  .map(buildScenario);

export const liveMeta = {
  fetchedFrom: live.fetchedFrom,
  fetchedAt: live.fetchedAt,
  workItems: live.totals?.workItems ?? 0,
  distinctDefs: live.totals?.distinctDefs ?? 0,
  /** All 80 raw work items for the global "All work" view. */
  board: live.board ?? [],
};