import { Activity, type ActivityVerifications, type ActivityVideoUrls } from "@blade-and-brawn/domain";
import type { Static } from "@sinclair/typebox";
import { t } from "elysia";
import { db } from "../database/db";

export const VerificationStatusSchema = t.Union([
    t.Literal("request"),
    t.Literal("in_review"),
    t.Literal("action_requested"),
    t.Literal("completed"),
]);
export type VerificationStatus = Static<typeof VerificationStatusSchema>;

export class VerificationsService {
    async request(assessmentId: string, accountId: string, activityVideoUrls: ActivityVideoUrls) {
        // Only the owning account may request verification of their own assessment.
        const assessment = await db.selectFrom("assessments")
            .select("id")
            .where("id", "=", assessmentId)
            .where("account_id", "=", accountId)
            .executeTakeFirst();
        if (!assessment) return undefined;

        return await db.insertInto("verifications")
            .values({
                assessment_id: assessmentId,
                status: "request" satisfies VerificationStatus,
                url_back_squat: activityVideoUrls[Activity.BackSquat] ?? null,
                url_deadlift: activityVideoUrls[Activity.Deadlift] ?? null,
                url_bench_press: activityVideoUrls[Activity.BenchPress] ?? null,
                url_broad_jump: activityVideoUrls[Activity.BroadJump] ?? null,
                url_run: activityVideoUrls[Activity.Run] ?? null,
                url_cone_drill: activityVideoUrls[Activity.ConeDrill] ?? null,
            })
            .onConflict((oc) => oc
                .column("assessment_id")
                .doUpdateSet((eb) => ({
                    status: "request" satisfies VerificationStatus,
                    url_back_squat: eb.ref("excluded.url_back_squat"),
                    url_deadlift: eb.ref("excluded.url_deadlift"),
                    url_bench_press: eb.ref("excluded.url_bench_press"),
                    url_broad_jump: eb.ref("excluded.url_broad_jump"),
                    url_run: eb.ref("excluded.url_run"),
                    url_cone_drill: eb.ref("excluded.url_cone_drill"),
                    // Re-requesting means new videos are under review, so the
                    // previous cycle's per-activity judgments and completion
                    // info no longer apply.
                    verf_back_squat: null,
                    verf_deadlift: null,
                    verf_bench_press: null,
                    verf_broad_jump: null,
                    verf_run: null,
                    verf_cone_drill: null,
                    completed_at: null,
                    completed_by: null,
                }))
            )
            .returning("id")
            .executeTakeFirstOrThrow();
    }

    // Joined with the assessment being verified, since reviewing a request
    // requires seeing the player's claimed performance alongside the videos.
    private static baseQuery() {
        return db.selectFrom("verifications")
            .innerJoin("assessments", "assessments.id", "verifications.assessment_id")
            .select([
                "verifications.id",
                "verifications.assessment_id",
                "verifications.status",
                "verifications.created_at",
                "verifications.completed_at",
                "verifications.completed_by",
                "verifications.reviewer_notes",
                "verifications.url_back_squat",
                "verifications.url_deadlift",
                "verifications.url_bench_press",
                "verifications.url_broad_jump",
                "verifications.url_run",
                "verifications.url_cone_drill",
                "verifications.verf_back_squat",
                "verifications.verf_deadlift",
                "verifications.verf_bench_press",
                "verifications.verf_broad_jump",
                "verifications.verf_run",
                "verifications.verf_cone_drill",
                "assessments.name",
                "assessments.gender",
                "assessments.age",
                "assessments.weight",
                "assessments.perf_back_squat",
                "assessments.perf_deadlift",
                "assessments.perf_bench_press",
                "assessments.perf_broad_jump",
                "assessments.perf_run",
                "assessments.perf_cone_drill",
            ]);
    }

    async get(id: string) {
        return await VerificationsService.baseQuery()
            .where("verifications.id", "=", id)
            .executeTakeFirst();
    }

    async list(opt: {
        filter?: { status?: VerificationStatus },
        limit?: number,
        offset?: number,
    } = {}) {
        return await VerificationsService.baseQuery()
            .$if(opt.filter?.status !== undefined, (qb) => qb
                .where("verifications.status", "=", opt.filter!.status!)
            )
            .orderBy("verifications.created_at", "desc")
            .$if(opt.limit !== undefined, (qb) => qb.limit(opt.limit!))
            .$if(opt.offset !== undefined, (qb) => qb.offset(opt.offset!))
            .execute();
    }

    async requestAction(id: string, reviewerNotes: string | null, activityVerifications: ActivityVerifications) {
        const result = await db.updateTable("verifications")
            .where("id", "=", id)
            .set({
                status: "action_requested" satisfies VerificationStatus,
                reviewer_notes: reviewerNotes,
                verf_back_squat: activityVerifications[Activity.BackSquat] ?? null,
                verf_deadlift: activityVerifications[Activity.Deadlift] ?? null,
                verf_bench_press: activityVerifications[Activity.BenchPress] ?? null,
                verf_broad_jump: activityVerifications[Activity.BroadJump] ?? null,
                verf_run: activityVerifications[Activity.Run] ?? null,
                verf_cone_drill: activityVerifications[Activity.ConeDrill] ?? null,
            })
            .executeTakeFirst();
        return result.numUpdatedRows > 0n;
    }

    async complete(id: string, completedBy: string, activityVerifications: ActivityVerifications) {
        const result = await db.updateTable("verifications")
            .where("id", "=", id)
            .set({
                status: "completed" satisfies VerificationStatus,
                completed_at: new Date(),
                completed_by: completedBy,
                verf_back_squat: activityVerifications[Activity.BackSquat] ?? null,
                verf_deadlift: activityVerifications[Activity.Deadlift] ?? null,
                verf_bench_press: activityVerifications[Activity.BenchPress] ?? null,
                verf_broad_jump: activityVerifications[Activity.BroadJump] ?? null,
                verf_run: activityVerifications[Activity.Run] ?? null,
                verf_cone_drill: activityVerifications[Activity.ConeDrill] ?? null,
            })
            .executeTakeFirst();
        return result.numUpdatedRows > 0n;
    }
}