import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { getPayload, type CollectionSlug, type Payload, type Where } from "payload";
import type { LaborClassification, Map as MapDoc, Resource, Structure } from "@/payload-types";

import config from "@payload-config";
import dotenv from "dotenv";
import { processProductionTick } from "@/lib/base/production";

dotenv.config({ path: ".env" });

const RUN = `prod-${Date.now()}`;
const LEXICAL_EMPTY = {
  root: {
    children: [{ text: "" }],
    direction: null,
    format: "" as const,
    indent: 0,
    type: "text",
    version: 1,
  },
};

let payload: Payload;
let laborCounter = 0;

const createdIds = {
  maps: [] as number[],
  resources: [] as number[],
  structureBlueprints: [] as number[],
  gameStructures: [] as number[],
  classifications: [] as number[],
};

async function makeResource(name: string, massPerUnit = 1): Promise<Resource> {
  return (await payload.create({
    collection: "resources",
    data: {
      name,
      codeName: `${RUN}-${name.toLowerCase().replace(/\s+/g, "-")}`,
      approvalStatus: "in_progress",
      type: "physical",
      baseValue: 1,
      rarity: "common",
      unitOfMeasure: "kg",
      massPerUnit,
      gridWidth: 1,
      gridHeight: 1,
    },
    overrideAccess: true,
    depth: 0,
  })) as unknown as Resource;
}

async function makeBlueprint(data: {
  name: string;
  inputs: { resource: number; amountPerHour: number }[];
  outputs: { resource: number; amountPerHour: number }[];
  maxCapacityMass?: number;
}): Promise<Structure> {
  return (await payload.create({
    collection: "structures",
    data: {
      name: data.name,
      codeName: data.name.toLowerCase().replace(/\s+/g, "_"),
      approvalStatus: "in_progress",
      description: LEXICAL_EMPTY as unknown as Structure["description"],
      category: "logistics",
      materials: [{ resource: (data.outputs[0] ?? data.inputs[0]).resource, amount: 1 }],
      constructionDurationMinutes: 1,
      terrainType: "land",
      maxHealth: 100,
      maxCapacityMass: data.maxCapacityMass,
      productionInputs: data.inputs,
      productionOutputs: data.outputs,
    },
    overrideAccess: true,
    depth: 0,
  })) as unknown as Structure;
}

async function makeSite(data: {
  name: string;
  blueprintId: number;
  paused?: boolean;
}): Promise<{ id: number; name: string }> {
  return (await payload.create({
    collection: "game-structures",
    data: {
      name: data.name,
      type: data.blueprintId,
      map: createdIds.maps[0],
      coordinates: [500, 500],
      constructionStatus: "complete",
      productionPaused: data.paused ?? false,
    },
    overrideAccess: true,
    depth: 0,
  })) as unknown as { id: number; name: string };
}

async function assignLabor(siteId: number, headcount = 5): Promise<void> {
  laborCounter += 1;
  const classification = (await payload.create({
    collection: "labor-classifications",
    data: {
      name: `${RUN} Workers ${laborCounter}`,
      key: `${RUN}-workers-${laborCounter}`,
      defaultUnitSalary: 1,
      availableHeadcount: 50,
    },
    overrideAccess: true,
    depth: 0,
  })) as unknown as LaborClassification;
  createdIds.classifications.push(classification.id);
  await payload.create({
    collection: "npc-staffing",
    data: {
      structure: siteId,
      positionType: "other",
      headcount,
      laborClassification: classification.id,
      positionTitle: "Labor crew",
      status: "active",
    },
    overrideAccess: true,
  });
}

async function stallReason(siteId: number): Promise<string | null> {
  const doc = (await payload.findByID({
    collection: "game-structures",
    id: siteId,
    depth: 0,
    overrideAccess: true,
  })) as unknown as { productionStallReason: string | null };
  return doc.productionStallReason;
}

describe("Production system", () => {
  beforeAll(async () => {
    payload = await getPayload({ config });
    createdIds.maps.push(
      (
        (await payload.create({
          collection: "maps",
          data: {
            name: `${RUN} map`,
            worldSizeWidth: 8192,
            worldSizeHeight: 8192,
            basemapMode: "image",
          },
          overrideAccess: true,
          depth: 0,
        })) as unknown as MapDoc
      ).id,
    );
  });

  afterAll(async () => {
    const sweep = async (collection: CollectionSlug, where: Where) => {
      const found = await payload
        .find({ collection, where, limit: 500, depth: 0, overrideAccess: true })
        .catch(() => null);
      for (const doc of found?.docs ?? []) {
        await payload.delete({ collection, id: doc.id, overrideAccess: true }).catch(() => {});
      }
    };
    await sweep("npc-staffing", { structure: { in: createdIds.gameStructures } });
    await sweep("game-event-logs", { structure: { in: createdIds.gameStructures } });
    await sweep("game-structures", { name: { like: `${RUN}%` } });
    await sweep("structures", { name: { like: `${RUN}%` } });
    await sweep("labor-classifications", { name: { like: `${RUN}%` } });
    await sweep("resources", { name: { like: `${RUN}%` } });
    await sweep("maps", { name: { like: `${RUN}%` } });
  });

  it("consumes inputs, produces outputs, and advances the clock", async () => {
    const ore = await makeResource("Ore");
    const fuel = await makeResource("Fuel");
    createdIds.resources.push(ore.id, fuel.id);
    const blueprint = await makeBlueprint({
      name: `${RUN} Refinery`,
      inputs: [{ resource: ore.id, amountPerHour: 100 }],
      outputs: [{ resource: fuel.id, amountPerHour: 50 }],
    });
    createdIds.structureBlueprints.push(blueprint.id);
    const site = await makeSite({ name: `${RUN} Refinery site`, blueprintId: blueprint.id });
    createdIds.gameStructures.push(site.id);

    // Prime the clock, staff the site, then run an hour later with ore in storage.
    const start = new Date();
    await processProductionTick(payload, undefined, start, [site.id]);
    await assignLabor(site.id);
    await payload.update({
      collection: "game-structures",
      id: site.id,
      data: { storedResources: [{ resource: ore.id, amount: 500, gridX: 0, gridY: 0 }] },
      overrideAccess: true,
    });
    const result = await processProductionTick(
      payload,
      undefined,
      new Date(start.getTime() + 3_600_000),
      [site.id],
    );
    expect(result.produced).toBe(1);

    const after = (await payload.findByID({
      collection: "game-structures",
      id: site.id,
      depth: 1,
      overrideAccess: true,
    })) as unknown as {
      voidStorage: { resource: number | Resource; amount: number }[];
      storedResources: { resource: number | Resource; amount: number }[];
    };

    const fuelStored = after.voidStorage.find(
      (entry) => (entry.resource as Resource).id === fuel.id,
    );
    expect(fuelStored?.amount).toBe(50);
    const oreLeft = after.storedResources.find(
      (entry) => (entry.resource as Resource).id === ore.id,
    );
    expect(oreLeft?.amount).toBe(400);
  });

  it("stalls on missing labor and missing inputs with surfaced reasons", async () => {
    const scrap = await makeResource("Scrap");
    createdIds.resources.push(scrap.id);
    const blueprint = await makeBlueprint({
      name: `${RUN} Mill`,
      inputs: [{ resource: scrap.id, amountPerHour: 10 }],
      outputs: [{ resource: scrap.id, amountPerHour: 5 }],
    });
    createdIds.structureBlueprints.push(blueprint.id);
    const site = await makeSite({ name: `${RUN} Mill site`, blueprintId: blueprint.id });
    createdIds.gameStructures.push(site.id);

    const start = new Date();
    await processProductionTick(payload, undefined, start, [site.id]);

    // No labor crew assigned: no_labor.
    await processProductionTick(payload, undefined, new Date(start.getTime() + 3_600_000), [
      site.id,
    ]);
    expect(await stallReason(site.id)).toBe("no_labor");

    // With labor but no ore: missing_inputs.
    const classification = (await payload.create({
      collection: "labor-classifications",
      data: {
        name: `${RUN} Workers`,
        key: `${RUN}-workers`,
        defaultUnitSalary: 1,
        availableHeadcount: 50,
      },
      overrideAccess: true,
      depth: 0,
    })) as unknown as LaborClassification;
    createdIds.classifications.push(classification.id);
    await payload.create({
      collection: "npc-staffing",
      data: {
        structure: site.id,
        positionType: "other",
        headcount: 5,
        laborClassification: classification.id,
        positionTitle: "Labor crew",
        status: "active",
      },
      overrideAccess: true,
    });
    await assignLabor(site.id);
    await processProductionTick(payload, undefined, new Date(start.getTime() + 7_200_000), [
      site.id,
    ]);
    expect(await stallReason(site.id)).toBe("missing_inputs");
  });

  it("respects the pause flag and clamps output to storage capacity", async () => {
    const grain = await makeResource("Grain");
    createdIds.resources.push(grain.id);
    const blueprint = await makeBlueprint({
      name: `${RUN} Silo`,
      inputs: [],
      outputs: [{ resource: grain.id, amountPerHour: 1000 }],
      maxCapacityMass: 300,
    });
    createdIds.structureBlueprints.push(blueprint.id);

    const pausedSite = await makeSite({
      name: `${RUN} Silo paused`,
      blueprintId: blueprint.id,
      paused: true,
    });
    createdIds.gameStructures.push(pausedSite.id);
    const start = new Date();
    await processProductionTick(payload, undefined, start);
    await processProductionTick(payload, undefined, new Date(start.getTime() + 3_600_000), [
      pausedSite.id,
    ]);
    const after = (await payload.findByID({
      collection: "game-structures",
      id: pausedSite.id,
      depth: 0,
      overrideAccess: true,
    })) as unknown as { lastProductionAt: string | null; voidStorage: unknown[] };
    expect(after.lastProductionAt).toBeNull();
    expect(after.voidStorage).toHaveLength(0);

    const capped = await makeSite({ name: `${RUN} Silo capped`, blueprintId: blueprint.id });
    createdIds.gameStructures.push(capped.id);
    await assignLabor(capped.id);
    await processProductionTick(payload, undefined, start, [capped.id]);
    await processProductionTick(payload, undefined, new Date(start.getTime() + 3_600_000), [
      capped.id,
    ]);
    const cappedAfter = (await payload.findByID({
      collection: "game-structures",
      id: capped.id,
      depth: 0,
      overrideAccess: true,
    })) as unknown as { voidStorage: { amount: number }[] };
    expect(cappedAfter.voidStorage[0]?.amount).toBe(300);
  });
});