import { Form, Link } from "react-router";
import type { Route } from "./+types/admin.sports-seasons.$id.expected-values";
import { loader, action } from "./admin.sports-seasons.$id.expected-values.server";
import { Button } from "~/components/ui/button";
import { Input } from "~/components/ui/input";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "~/components/ui/card";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "~/components/ui/table";
import { ArrowLeft, Save, Calculator } from "lucide-react";

export { loader, action };

export default function ExpectedValuesPage({ loaderData, actionData }: Route.ComponentProps) {
  const { sportsSeason, participants, existingEVs } = loaderData;

  const totalEV = Array.from(existingEVs.values()).reduce(
    (sum, ev) => sum + parseFloat(ev.expectedValue),
    0
  );

  const participantIds = participants
    .map((p: { id: string; name: string }) => p.id)
    .join(",");

  return (
    <div className="container mx-auto p-6 space-y-6">
      <div className="flex items-center gap-4">
        <Link to={`/admin/sports-seasons/${sportsSeason.id}`}>
          <Button variant="ghost" size="sm">
            <ArrowLeft className="h-4 w-4 mr-2" />
            Back to Sports Season
          </Button>
        </Link>
      </div>

      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <Calculator className="h-5 w-5" />
            Expected Values: {sportsSeason.sport.name} {sportsSeason.year}
          </CardTitle>
          <CardDescription>
            Manage probability distributions and expected values for participants
          </CardDescription>
        </CardHeader>
        <CardContent className="space-y-6">
          {actionData?.error && (
            <div className="p-4 bg-red-50 border border-red-200 rounded-md text-red-700">
              {actionData.error}
            </div>
          )}
          {actionData?.success && (
            <div className="p-4 bg-green-50 border border-green-200 rounded-md text-green-700">
              All participants saved successfully!
            </div>
          )}

          <div className="text-sm text-gray-600 space-y-2">
            <p><strong>Default Scoring Rules (for EV calculation):</strong></p>
            <div className="grid grid-cols-4 gap-2">
              <span>1st: 100 pts</span>
              <span>2nd: 70 pts</span>
              <span>3rd: 50 pts</span>
              <span>4th: 40 pts</span>
              <span>5th: 25 pts</span>
              <span>6th: 25 pts</span>
              <span>7th: 15 pts</span>
              <span>8th: 15 pts</span>
            </div>
            <p className="text-xs text-gray-500 italic">
              Note: EVs will be recalculated with actual league scoring rules when used in fantasy leagues.
            </p>
          </div>

          <Form method="post">
            <input type="hidden" name="participantIds" value={participantIds} />

            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead>Participant</TableHead>
                  <TableHead className="text-center">1st %</TableHead>
                  <TableHead className="text-center">2nd %</TableHead>
                  <TableHead className="text-center">3rd %</TableHead>
                  <TableHead className="text-center">4th %</TableHead>
                  <TableHead className="text-center">5th %</TableHead>
                  <TableHead className="text-center">6th %</TableHead>
                  <TableHead className="text-center">7th %</TableHead>
                  <TableHead className="text-center">8th %</TableHead>
                  <TableHead className="text-center">EV</TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {participants.map((participant: { id: string; name: string }) => {
                  const existingEV = existingEVs.get(participant.id);
                  const id = participant.id;

                  return (
                    <TableRow key={id}>
                      <TableCell className="font-medium">{participant.name}</TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probFirst_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probFirst) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probSecond_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probSecond) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probThird_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probThird) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probFourth_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probFourth) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probFifth_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probFifth) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probSixth_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probSixth) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probSeventh_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probSeventh) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell>
                        <Input
                          type="number"
                          name={`probEighth_${id}`}
                          defaultValue={existingEV ? (parseFloat(existingEV.probEighth) * 100).toFixed(2) : "0"}
                          step="0.01"
                          min="0"
                          max="100"
                          className="w-20 text-center"
                        />
                      </TableCell>
                      <TableCell className="text-center font-semibold">
                        {existingEV ? parseFloat(existingEV.expectedValue).toFixed(2) : "-"}
                      </TableCell>
                    </TableRow>
                  );
                })}
                {existingEVs.size > 0 && (
                  <TableRow className="border-t-2 font-bold bg-muted/50">
                    <TableCell colSpan={9} className="text-right">Total EV</TableCell>
                    <TableCell className="text-center">{totalEV.toFixed(2)}</TableCell>
                  </TableRow>
                )}
              </TableBody>
            </Table>

            {participants.length === 0 ? (
              <p className="text-center text-gray-500 py-8">
                No participants found. Please add participants to this sports season first.
              </p>
            ) : (
              <div className="flex justify-end pt-4">
                <Button type="submit">
                  <Save className="h-4 w-4 mr-2" />
                  Save All
                </Button>
              </div>
            )}
          </Form>
        </CardContent>
      </Card>
    </div>
  );
}