import { useMemo, useState } from "react";
import ModuleSlots from "./ModuleSlots";
import styles from "./ClockWizard.module.css";
import { useClockStore } from "../../store/useClockStore";
import type { Recipe } from "../../../scripts/factorio-dump/helpers/recipes.helper";
import type { Machine, Module } from "../../../scripts/factorio-dump/process-data.models";

import MachineSelector from "../MachineSelector";
import BeaconConfigurator, { type BeaconGroup } from "./BeaconConfigurator";
import ExpressionInput from "./ExpressionInpux";
import InputConfigurator from "./InputConfigurator";
import { calculateOptimalBatch, computeMachineStats, generateAdvancedClock, type ClockConfig } from "../../engine";

export default function ClockWizard() {
  const loadState = useClockStore((s) => s.loadState);

  const [recipe, setRecipe] = useState<Recipe | null>(null);
  const [machine, setMachine] = useState<Machine | null>(null);
  const [machineQuality, setMachineQuality] = useState<number>(0);

  const [machineModules, setMachineModules] = useState<{ module: Module; qualityLevel: number }[]>([]);
  const [beaconGroups, setBeaconGroups] = useState<BeaconGroup[]>([]);

  // Storing user preferences for inserter mapping (mixed belts, presets)
  const [inputConfigs, setInputConfigs] = useState<Record<string, any>>({});

  // Target Throughput State
  const [targetThroughput, setTargetThroughput] = useState<number>(0);

  // --- LIVE STATS CALCULATION ---
  const stats = useMemo(() => {
    if (!machine || !recipe) return null;
    return computeMachineStats(
      {
        machine,
        machineQualityLevel: machineQuality,
        machineModules,
        beacons: beaconGroups.map((bg) => ({
          beacon: bg.beacon,
          beaconQualityLevel: bg.qualityLevel,
          count: bg.count,
          modules: bg.modules,
        })),
      },
      recipe,
    );
  }, [machine, recipe, machineQuality, machineModules, beaconGroups]);

  // --- THROUGHPUT & SCALING MATH ---
  const throughputData = useMemo(() => {
    if (!stats || !recipe || !recipe.results) return null;

    // Find main output
    const mainResult = recipe.results[0];
    const baseAmount = (mainResult as any).amount ?? (mainResult as any).amount_min ?? 1;
    const yieldPerCraft = baseAmount * (1 + stats.productivityBonus);

    // Items per minute for ONE machine
    const baseItemsPerMin = yieldPerCraft * stats.craftsPerSecond * 60;

    // How many machines are needed?
    const requiredMachines = targetThroughput > 0 ? Math.ceil(targetThroughput / baseItemsPerMin) : 1;

    return {
      mainOutputName: mainResult.name,
      baseItemsPerMin,
      requiredMachines,
      actualThroughput: requiredMachines * baseItemsPerMin,
    };
  }, [stats, recipe, targetThroughput]);

  const handleGenerate = () => {
    if (!recipe || !machine || !stats || !throughputData) return;

    // Math
    const batch = calculateOptimalBatch(recipe, stats, {});

    // Build the strict Config Interface
    const clockConfig: ClockConfig = {
      machineCount: throughputData.requiredMachines,
      inputs: {},
      outputs: {},
    };

    // Map UI input configs to the Engine contract
    Object.keys(batch.inputs).forEach((itemId) => {
      const userCfg = inputConfigs[itemId] || {};
      clockConfig.inputs[itemId] = {
        inserterId: userCfg.inserterId || `in-${itemId}`,
        presetId: userCfg.source === "belt" ? "belt_to_chest" : "chest_to_chest",
        swingTicks: userCfg.source === "belt" ? 12 : 8,
        stackSize: 16,
      };
    });

    // Default output configs (could also be exposed in UI later)
    Object.keys(batch.outputs).forEach((itemId) => {
      clockConfig.outputs[itemId] = {
        inserterId: `out-${itemId}`,
        presetId: "chest_to_belt",
        swingTicks: 12,
        stackSize: 16,
      };
    });

    // 3. Generate Blueprint / Timeline Blocks
    const clockData = generateAdvancedClock(batch, clockConfig);

    // 4. Update Store
    loadState({
      duration: clockData.duration,
      rows: Object.fromEntries(clockData.rows.map((r) => [r.id, r])),
      rowOrder: clockData.rows.map((r) => r.id),
      blocks: Object.fromEntries(clockData.blocks.map((b) => [b.id, b])),
      selectedBlockIds: new Set(),
    });
  };

  return (
    <div
      className={styles.wrap}
      style={{
        display: "flex",
        flexDirection: "column",
        gap: "24px",
        padding: "20px",
        background: "#313031",
        color: "#ffe6c0",
        border: "1px solid #646464",
        borderRadius: "8px",
      }}
    >
      {/*  Recipe & Machine */}
      <div style={{ display: "flex", gap: "20px", alignItems: "flex-start" }}>
        <div style={{ flex: 1 }}>
          <h2 className={styles.h2}>1. Setup Machine</h2>
          <MachineSelector
            onChange={(res) => {
              setMachine(res.machine);
              setMachineQuality(res.qualityLevel);
              setRecipe(res.recipe);
            }}
          />
        </div>

        {/* --- STATS PREVIEW DASHBOARD --- */}
        {stats && throughputData && (
          <div
            style={{
              flex: 1,
              background: "#1a1a1a",
              border: "1px dashed #f1be64",
              borderRadius: "6px",
              padding: "12px",
              display: "grid",
              gridTemplateColumns: "1fr 1fr",
              gap: "10px",
            }}
          >
            <div
              style={{ gridColumn: "span 2", display: "flex", justifyContent: "space-between", alignItems: "center" }}
            >
              <h3 style={{ margin: 0, fontSize: "12px", color: "#999", textTransform: "uppercase" }}>
                Live Capabilities
              </h3>

              {/* Target Throughput Input */}
              <div style={{ display: "flex", alignItems: "center", gap: "8px" }}>
                <label style={{ fontSize: "11px", color: "#999" }}>Target (items/min)</label>
                <ExpressionInput
                  value={targetThroughput || 0}
                  onCommit={(value) => setTargetThroughput(value)}
                  className={styles.input}
                ></ExpressionInput>
              </div>
            </div>

            <div>
              <div style={{ fontSize: "11px", color: "#999" }}>Machine Output</div>
              <div style={{ fontSize: "18px", color: "#7fc98a", fontWeight: "bold" }}>
                {Math.round(throughputData.baseItemsPerMin)}{" "}
                <span style={{ fontSize: "12px", color: "#999", fontWeight: "normal" }}>
                  / min ({Math.round(throughputData.baseItemsPerMin / 6) / 10} / sec)
                </span>
              </div>
            </div>
            <div>
              <div style={{ fontSize: "11px", color: "#999" }}>Machines Needed</div>
              <div style={{ fontSize: "18px", color: "#f1be64", fontWeight: "bold" }}>
                {throughputData.requiredMachines}
                {targetThroughput > 0 && (
                  <span style={{ fontSize: "11px", color: "#999", marginLeft: "6px", fontWeight: "normal" }}>
                    ({Math.round(throughputData.actualThroughput)}/m)
                  </span>
                )}
              </div>
            </div>
            <div>
              <div style={{ fontSize: "11px", color: "#999" }}>Craft Time (Ticks)</div>
              <div style={{ fontSize: "14px", color: "#ffe6c0" }}>{stats.singleCraftTicks.toFixed(1)}t</div>
            </div>
            <div>
              <div style={{ fontSize: "11px", color: "#999" }}>Overload Limit</div>
              <div style={{ fontSize: "14px", color: "#ffe6c0" }}>{stats.overloadMultiplier}x</div>
              {stats.singleCraftTicks}
            </div>
          </div>
        )}
      </div>

      {machine && recipe && (
        <>
          {/*  Modules & Beacons */}
          <div style={{ display: "flex", gap: "40px" }}>
            <div style={{ flex: 1 }}>
              <h2 className={styles.h2}>2. Machine Modules</h2>
              <ModuleSlots
                maxSlots={machine.module_slots || 0}
                allowedEffects={machine.allowed_effects as string[]}
                onChange={setMachineModules}
              />
            </div>
            <div style={{ flex: 2 }}>
              <h2 className={styles.h2}>3. Beacons</h2>
              <BeaconConfigurator groups={beaconGroups} onChange={setBeaconGroups} />
            </div>
          </div>

          {/*  Input Configurator (Mixed Belts) */}
          <div style={{ width: "100%" }}>
            <h2 className={styles.h2}>4. Route Inputs (Mixed Belts)</h2>
            <InputConfigurator recipe={recipe} configs={inputConfigs} onChange={setInputConfigs} />
          </div>

          <button
            onClick={handleGenerate}
            style={{
              padding: "10px 16px",
              background: "#f1be64",
              color: "#1a1300",
              fontWeight: "bold",
              border: "none",
              borderRadius: "4px",
              cursor: "pointer",
              alignSelf: "flex-start",
            }}
          >
            Generate Optimized Timeline
          </button>
        </>
      )}
    </div>
  );
}