/**
 * Command: Inspect Chains (Current Section)
 */

import type { App, Editor } from "obsidian";
import { resolveSectionContext } from "../analysis/sectionContext";
import { inspectChains } from "../analysis/chainInspector";
import type { ChainRolesConfig } from "../dictionary/types";

export interface InspectChainsOptions {
  includeNoteLinks?: boolean;
  includeCandidates?: boolean;
  maxDepth?: number;
  direction?: "forward" | "backward" | "both";
}

/**
 * Format report as pretty-printed string.
 */
function formatReport(report: Awaited<ReturnType<typeof inspectChains>>): string {
  const lines: string[] = [];
  lines.push("=== Chain Inspector Report ===");
  lines.push("");
  lines.push(`Context: ${report.context.file}`);
  if (report.context.heading) {
    lines.push(`Section: ${report.context.heading}`);
  }
  lines.push(`Zone: ${report.context.zoneKind}`);
  lines.push("");

  lines.push("Settings:");
  lines.push(`  - Include Note Links: ${report.settings.includeNoteLinks}`);
  lines.push(`  - Include Candidates: ${report.settings.includeCandidates}`);
  lines.push(`  - Max Depth: ${report.settings.maxDepth}`);
  lines.push(`  - Direction: ${report.settings.direction}`);
  lines.push("");

  lines.push(`Neighbors:`);
  lines.push(`  Incoming: ${report.neighbors.incoming.length}`);
  for (const edge of report.neighbors.incoming.slice(0, 5)) {
    const targetStr = edge.target.heading
      ? `${edge.target.file}#${edge.target.heading}`
      : edge.target.file;
    lines.push(`    - ${edge.rawEdgeType} -> ${targetStr} [${edge.scope}]`);
  }
  if (report.neighbors.incoming.length > 5) {
    lines.push(`    ... and ${report.neighbors.incoming.length - 5} more`);
  }

  lines.push(`  Outgoing: ${report.neighbors.outgoing.length}`);
  for (const edge of report.neighbors.outgoing.slice(0, 5)) {
    const targetStr = edge.target.heading
      ? `${edge.target.file}#${edge.target.heading}`
      : edge.target.file;
    lines.push(`    - ${edge.rawEdgeType} -> ${targetStr} [${edge.scope}]`);
  }
  if (report.neighbors.outgoing.length > 5) {
    lines.push(`    ... and ${report.neighbors.outgoing.length - 5} more`);
  }
  lines.push("");

  lines.push(`Paths:`);
  lines.push(`  Forward: ${report.paths.forward.length}`);
  for (const path of report.paths.forward.slice(0, 3)) {
    const pathStr = path.nodes
      .map((n) => (n.heading ? `${n.file}#${n.heading}` : n.file))
      .join(" -> ");
    lines.push(`    - ${pathStr} (${path.edges.length} edges)`);
  }
  if (report.paths.forward.length > 3) {
    lines.push(`    ... and ${report.paths.forward.length - 3} more`);
  }

  lines.push(`  Backward: ${report.paths.backward.length}`);
  for (const path of report.paths.backward.slice(0, 3)) {
    const pathStr = path.nodes
      .map((n) => (n.heading ? `${n.file}#${n.heading}` : n.file))
      .join(" -> ");
    lines.push(`    - ${pathStr} (${path.edges.length} edges)`);
  }
  if (report.paths.backward.length > 3) {
    lines.push(`    ... and ${report.paths.backward.length - 3} more`);
  }
  lines.push("");

  lines.push(`Gap Heuristics (Findings): ${report.findings.length}`);
  if (report.findings.length === 0) {
    lines.push(`  ✓ No issues detected`);
  } else {
    for (const finding of report.findings) {
      const severityIcon =
        finding.severity === "error"
          ? "❌"
          : finding.severity === "warn"
          ? "⚠️"
          : "ℹ️";
      lines.push(
        `  ${severityIcon} [${finding.severity.toUpperCase()}] ${finding.code}: ${finding.message}`
      );
    }
  }

  return lines.join("\n");
}

/**
 * Execute inspect chains command.
 */
export async function executeInspectChains(
  app: App,
  editor: Editor,
  filePath: string,
  chainRoles: ChainRolesConfig | null,
  options: InspectChainsOptions = {}
): Promise<void> {
  // Resolve section context
  const context = resolveSectionContext(editor, filePath);

  // Build options with defaults
  const inspectorOptions = {
    includeNoteLinks: options.includeNoteLinks ?? true,
    includeCandidates: options.includeCandidates ?? false,
    maxDepth: options.maxDepth ?? 3,
    direction: options.direction ?? "both",
  };

  // Inspect chains
  const report = await inspectChains(app, context, inspectorOptions, chainRoles);

  // Log report as JSON
  console.log("=== Chain Inspector Report (JSON) ===");
  console.log(JSON.stringify(report, null, 2));

  // Log pretty-printed summary
  console.log("\n=== Chain Inspector Report (Summary) ===");
  console.log(formatReport(report));
}