import { createHash } from "node:crypto";
import { mkdir, readFile, writeFile } from "node:fs/promises";
import { resolve } from "node:path";
import { fileURLToPath } from "node:url";
import { abilitiesForClass, abilityTalentNodeId } from "../../src/game/abilityCatalog";
import { abilityHasRotationSemantics, rotationProfileFor } from "../../src/game/combatRotation";
import { BOSS_TESTING_CATALOG } from "../../src/game/bossTesting";
import {
  coaClassDefinition,
  coaEntriesForClass,
  coaSpellById,
  COA_LIVE_SOURCE,
} from "../../src/game/coaLiveCatalog";
import {
  COA_FIRST_PARTY_MEMBERS,
  coaFirstPartySimulationConfig,
  loadCoaFirstPartyBuilds,
} from "../../src/game/benchmark/coaFirstParty";
import type { CoaClassId } from "../../src/app/characterCatalog";

const root = fileURLToPath(new URL("../../", import.meta.url));
const args = process.argv.slice(2);
let level = 60;
let listDungeon: string | undefined;
const bossKeys: string[] = [];
for (let index = 0; index < args.length; index += 2) {
  const flag = args[index];
  const value = args[index + 1];
  if (!value || value.startsWith("--")) throw new Error(`Missing value for ${flag}.`);
  if (flag === "--level") level = Number(value);
  else if (flag === "--boss") bossKeys.push(value);
  else if (flag === "--list-bosses") listDungeon = value;
  else throw new Error(`Unknown argument ${flag}.`);
}

if (listDungeon) {
  if (bossKeys.length) throw new Error("Use either --list-bosses or explicit --boss keys.");
  const bosses = BOSS_TESTING_CATALOG.filter((boss) => boss.dungeonId === listDungeon && boss.category === "wow");
  if (!bosses.length) throw new Error(`No WoW bosses found for ${listDungeon}.`);
  console.log(JSON.stringify(bosses.map(({ key, name }) => ({ key, name })), null, 2));
} else {
  // An explicit boss list prevents preparation from becoming an all-boss run.
  const selectedBosses = bossKeys.map((key) => {
    const boss = BOSS_TESTING_CATALOG.find((candidate) => candidate.key === key && candidate.category === "wow");
    if (!boss) throw new Error(`Unknown WoW boss key: ${key}.`);
    return { key: boss.key, name: boss.name };
  });
  const config = coaFirstPartySimulationConfig(level, bossKeys);
  const builds = await loadCoaFirstPartyBuilds(level);
  const sourceBytes = await readFile(resolve(root, "src/game/coaLiveData.generated.json"));
  const sourceSha256 = createHash("sha256").update(sourceBytes).digest("hex");
  const classes = COA_FIRST_PARTY_MEMBERS.map((member, slot) => {
    const classId = member.classId as CoaClassId;
    const definition = coaClassDefinition(classId);
    const abilities = abilitiesForClass(classId);
    const build = builds[slot];
    const firstPassTabs = new Set(definition.tabs
      .filter((tab) => tab.tabName === "Class" || tab.tabName === member.specialization)
      .map((tab) => tab.tabId));
    const nodes = coaEntriesForClass(classId).map((entry) => {
      const nodeId = `coa-entry-${entry.id}`;
      const mapped = abilities.filter((ability) => abilityTalentNodeId(ability) === nodeId);
      const effects = mapped.flatMap((ability) => [
        ...ability.effects,
        ...(ability.ranks ?? []).flatMap((rank) => rank.effects),
      ]);
      const spellIds = [...new Set(entry.rankDescriptions.map((rank) => rank.spellId))];
      return {
        nodeId,
        sourceNodeId: entry.id,
        name: entry.name,
        tree: definition.tabs.find((tab) => tab.tabId === entry.tabId)?.tabName ?? String(entry.tabId),
        phase: firstPassTabs.has(entry.tabId) ? "first-party" : "remaining-trees",
        description: entry.description,
        rankDescriptions: entry.rankDescriptions,
        spellIds,
        missingGlobalSpellIds: spellIds.filter((id) => !coaSpellById(id)?.dbc),
        selectedRank: build.talentRanks[nodeId] ?? 0,
        runtimeAbilityIds: mapped.map((ability) => ability.id),
        effectKinds: [...new Set(effects.map((effect) => effect.kind))].sort(),
        hasRotationSemantics: mapped.some(abilityHasRotationSemantics),
        sourceOperationsNeedingReview: effects.filter((effect) => (
          effect.kind === "scripted" || effect.kind === "unsupported"
          || (effect.kind === "utility" && effect.action === "class-script")
        )),
        // A catalog match cannot establish working class mechanics.
        mechanicVerification: "needs-review",
      };
    });
    return {
      ...member,
      slot,
      buildId: build.id,
      talentRanks: build.talentRanks,
      talentAllocation: "generated role-weighted diagnostic build; requires authored review",
      rotationProfileId: rotationProfileFor(classId, member.specializationId, member.specialization)?.id ?? null,
      readiness: "needs-testing",
      counts: {
        classNodes: nodes.length,
        firstPartyNodes: nodes.filter((node) => node.phase === "first-party").length,
        nodesWithoutRuntimeAbility: nodes.filter((node) => node.runtimeAbilityIds.length === 0).length,
        nodesWithRetainedSourceOperations: nodes.filter((node) => node.sourceOperationsNeedingReview.length > 0).length,
        sourceGapNodes: nodes.filter((node) => node.missingGlobalSpellIds.length > 0).length,
      },
      nodes,
    };
  });
  const report = {
    schemaVersion: 1,
    milestone: "coa-first-party",
    level,
    source: {
      realm: COA_LIVE_SOURCE.realmName,
      capturedAt: COA_LIVE_SOURCE.synchronizedAt,
      catalogSha256: sourceSha256,
      spellDbcPath: COA_LIVE_SOURCE.coaSpellDbcPath,
    },
    scope: "Explicit five-class diagnostic; no readiness promotion or balance certification.",
    bosses: selectedBosses,
    classes,
  };
  const output = resolve(root, "artifacts/coa-first-party", `level-${level}`);
  await mkdir(output, { recursive: true });
  const saveJson = (name: string, value: unknown) => writeFile(resolve(output, name), `${JSON.stringify(value, null, 2)}\n`);
  await saveJson("audit.json", report);
  await saveJson("config.json", config);
  for (let slot = 0; slot < COA_FIRST_PARTY_MEMBERS.length; slot += 1) {
    await saveJson(`seat-${slot + 1}.json`, coaFirstPartySimulationConfig(level, bossKeys, slot));
  }
  const markdown = [
    "# First CoA party — mechanic review inventory",
    "",
    `Level ${level}; ${COA_LIVE_SOURCE.realmName} capture ${COA_LIVE_SOURCE.synchronizedAt}.`,
    "Catalog mappings below are review inventory, not implemented-mechanic counts.",
    "All five remain Needs Testing. Generated talent allocations need authored review.",
    "",
    "| Class | Specialization | Role | All class nodes | First-party nodes | Nodes with retained source operations | Global source-gap nodes |",
    "| --- | --- | --- | ---: | ---: | ---: | ---: |",
    ...classes.map((entry) => `| ${entry.classId} | ${entry.specialization} | ${entry.role} | ${entry.counts.classNodes} | ${entry.counts.firstPartyNodes} | ${entry.counts.nodesWithRetainedSourceOperations} | ${entry.counts.sourceGapNodes} |`),
    "",
    "## Repeatable diagnostics",
    "",
    `Bosses: ${selectedBosses.map((boss) => `${boss.name} (${boss.key})`).join(", ")}.`,
    "Five seat configurations keep the same classes and build IDs while moving the active player.",
    "The full node checklist, spell IDs, descriptions, and source-operation review flags are in audit.json.",
    "No encounter simulation runs during preparation.",
    "",
    `Source catalog SHA-256: ${sourceSha256}.`,
  ].join("\n");
  await writeFile(resolve(output, "audit.md"), `${markdown}\n`);
  console.log(JSON.stringify({ output, classes: classes.map(({ classId, specialization, counts }) => ({ classId, specialization, counts })), configurations: 5, simulatedEncounters: 0 }, null, 2));
}