import "dotenv/config";
import { createClient } from "@supabase/supabase-js";
import { clerkClient } from "@clerk/nextjs/server";
import * as fs from "fs";
import * as path from "path";

const supabase = createClient(
    process.env.NEXT_PUBLIC_SUPABASE_URL!,
    "sb_secret_N7UND0UgjKTVK-Uodkm0Hg_xSvEMPvz",
    { auth: { persistSession: false } }
);

const PASSWORD = "&%5C400l&%";

async function cleanClerk() {
    console.log("Cleaning up old Clerk users...");
    const clerk = clerkClient();
    const users = await clerk.users.getUserList({ limit: 500 });
    for (const user of users.data) {
        if (
            user.publicMetadata.role === "teacher" ||
            user.publicMetadata.role === "student" ||
            user.publicMetadata.role === "parent"
        ) {
            await clerk.users.deleteUser(user.id);
        }
    }
}

async function cleanSupabase() {
    console.log("Cleaning up Supabase tables...");
    const tables = [
        "Result", "Assignment", "Exam", "Attendance", "Event", "Announcement",
        "Lesson", "TeacherSchool", "TeacherSubject", "StudentClass", "Student", "Teacher", "Parent", "Class", "Subject", "Grade", "School", "Admin"
    ];
    for (const table of tables) {
        await supabase.from(table).delete().neq("id", "0" as any);
    }
}

type AdminSeedInfo = {
    adminId: string;
    defaultSchoolId: string;
};

async function seedAdmin(): Promise<AdminSeedInfo | null> {
    console.log("Syncing Admin and Creating Default School...");
    const clerk = clerkClient();
    const users = await clerk.users.getUserList({ limit: 100 });
    const adminUser = users.data.find(u => u.username === "admin" || u.emailAddresses[0]?.emailAddress?.includes("admin"));

    if (adminUser) {
        const defaultSchoolId = "default-school-1";
        await supabase.from("School").upsert({
            id: defaultSchoolId,
            name: "Lama Academy",
            type: "MANAGED",
            adminId: adminUser.id
        });

        await supabase.from("Admin").upsert({
            id: adminUser.id,
            username: adminUser.username || "admin",
            schoolId: defaultSchoolId,
        });
        console.log(
            `Synced Admin ID: ${adminUser.id} and School ID: ${defaultSchoolId}`,
        );
        return { adminId: adminUser.id, defaultSchoolId };
    }
    return null;
}

/** Parse a CSV line respecting double-quoted fields (handles commas inside quotes). */
function parseCsvLine(line: string): string[] {
    const trimmed = line.replace(/\r$/, "").trim();
    if (!trimmed) return [];
    const result: string[] = [];
    let current = "";
    let inQuotes = false;
    for (let i = 0; i < trimmed.length; i++) {
        const c = trimmed[i];
        if (c === '"') {
            if (inQuotes && trimmed[i + 1] === '"') {
                current += '"';
                i++;
            } else {
                inQuotes = !inQuotes;
            }
        } else if (c === "," && !inQuotes) {
            result.push(current.trim());
            current = "";
        } else {
            current += c;
        }
    }
    result.push(current.trim());
    return result;
}

async function seedSchoolDirectory(adminId: string) {
    try {
        console.log("Seeding School directory from school_data.csv...");
        const csvPath = path.join(process.cwd(), "school_data.csv");
        if (!fs.existsSync(csvPath)) {
            console.log("school_data.csv not found. Skipping school directory seed.");
            return;
        }

        const raw = fs.readFileSync(csvPath, "utf-8");
        const lines = raw.split(/\r?\n/).filter((l) => l.trim().length > 0);
        if (lines.length <= 1) {
            console.log("school_data.csv has no data rows. Skipping.");
            return;
        }

        const header = parseCsvLine(lines[0]);
        const idxUrn = header.indexOf("URN");
        const idxName = header.indexOf("EstablishmentName");
        const idxStatus = header.indexOf("EstablishmentStatus (name)");
        const idxTypeGroup = header.indexOf("EstablishmentTypeGroup (name)");

        if (idxUrn === -1 || idxName === -1 || idxStatus === -1 || idxTypeGroup === -1) {
            console.log("Expected columns not found in school_data.csv header. Skipping.");
            return;
        }

        const schools: { id: string; name: string; type: string; adminId: string }[] = [];

        const MAX_ROWS = 500; // limit for local dev to avoid huge inserts
        const dataLines = lines.slice(1, 1 + MAX_ROWS);

        for (const line of dataLines) {
            const cols = parseCsvLine(line);
            if (!cols.length) continue;

            const status = cols[idxStatus];
            if (status !== "Open") continue;

            const urn = cols[idxUrn];
            const name = cols[idxName];
            const typeGroup = cols[idxTypeGroup] || "";

            if (!urn || !name) continue;

            const schoolType =
                /independent/i.test(typeGroup) ? "INDEPENDENT" : "MANAGED";

            schools.push({
                id: urn.toString(),
                name,
                type: schoolType,
                adminId,
            });
        }

        if (schools.length === 0) {
            console.log("No open schools found to seed from CSV.");
            return;
        }

        const { error } = await supabase.from("School").upsert(schools);
        if (error) {
            console.error("Error seeding School directory from CSV:", error);
        } else {
            console.log(`Seeded/updated ${schools.length} schools from directory.`);
        }
    } catch (err) {
        console.error("Failed to seed School directory from CSV:", err);
    }
}

async function seedTestTimetableForSchool(
    schoolId: string,
    teacherId: string,
    classId: number,
    subjectIds: number[],
) {
    try {
        console.log(`Seeding basic timetable config for school ${schoolId}...`);

        // 1. Ensure AcademicYear and SchoolTimetable exist for this school
        const { data: existingAy } = await supabase
            .from("AcademicYear")
            .select("id")
            .eq("schoolId", schoolId)
            .limit(1)
            .single();

        let academicYearId: number;
        if (existingAy?.id) {
            academicYearId = existingAy.id;
        } else {
            const { data: newAy, error: ayError } = await supabase
                .from("AcademicYear")
                .insert({ schoolId, startYear: 2026, endYear: 2027, name: "2026-2027" })
                .select("id")
                .single();
            if (ayError || !newAy) {
                console.error("Error seeding AcademicYear for school", schoolId, ayError);
                return;
            }
            academicYearId = newAy.id;
        }

        const { data: existingSt } = await supabase
            .from("SchoolTimetable")
            .select("id")
            .eq("academicYearId", academicYearId)
            .eq("schoolId", schoolId)
            .limit(1)
            .single();

        let schoolTimetableId: number;
        if (existingSt?.id) {
            schoolTimetableId = existingSt.id;
        } else {
            const { data: newSt, error: stError } = await supabase
                .from("SchoolTimetable")
                .insert({ academicYearId, schoolId, name: "Standard Week" })
                .select("id")
                .single();
            if (stError || !newSt) {
                console.error("Error seeding SchoolTimetable for school", schoolId, stError);
                return;
            }
            schoolTimetableId = newSt.id;
        }

        const termStart = new Date("2026-02-23T00:00:00.000Z");
        const termEnd = new Date("2026-03-27T00:00:00.000Z");

        const { data: term, error: termError } = await supabase
            .from("Term")
            .insert({
                schoolId,
                academicYearId,
                name: "Spring Term 2026 (Seeded)",
                startDate: termStart.toISOString(),
                endDate: termEnd.toISOString(),
            })
            .select()
            .single();

        if (termError) {
            console.error("Error seeding term for school", schoolId, termError);
            return;
        }

        await supabase.from("Holiday").insert({
            schoolId,
            academicYearId,
            name: "Half Term Break",
            startDate: "2026-03-09T00:00:00.000Z",
            endDate: "2026-03-13T23:59:59.000Z",
        });

        const { data: slots, error: slotError } = await supabase
            .from("SchoolTimetableSlot")
            .insert([
                {
                    schoolId,
                    schoolTimetableId,
                    name: "Period 1",
                    startTime: "09:00",
                    endTime: "10:00",
                    isTeachingSlot: true,
                    position: 1,
                },
                {
                    schoolId,
                    schoolTimetableId,
                    name: "Period 2",
                    startTime: "10:15",
                    endTime: "11:15",
                    isTeachingSlot: true,
                    position: 2,
                },
                {
                    schoolId,
                    schoolTimetableId,
                    name: "Period 3",
                    startTime: "11:30",
                    endTime: "12:30",
                    isTeachingSlot: true,
                    position: 3,
                },
            ])
            .select();

        if (slotError || !slots || slots.length === 0) {
            console.error("Error seeding timetable slots for school", schoolId, slotError);
            return;
        }

        const p1 = slots.find((s: any) => s.name === "Period 1");
        const p2 = slots.find((s: any) => s.name === "Period 2");
        const p3 = slots.find((s: any) => s.name === "Period 3");

        if (!p1 || !p2 || !p3) {
            console.error("Missing seeded slots for school", schoolId);
            return;
        }

        const { data: templates, error: templateError } = await supabase
            .from("TeacherTimetableTemplate")
            .insert({
                schoolId,
                schoolTimetableId,
                name: "Default Weekly Template (Seeded)",
                teacherId,
            })
            .select();

        if (templateError || !templates || templates.length === 0) {
            console.error("Error seeding timetable template for school", schoolId, templateError);
            return;
        }

        const templateId = templates[0].id as number;
        const [subjectA, subjectB] = subjectIds;

        const entries = [
            {
                teacherTimetableTemplateId: templateId,
                schoolTimetableSlotId: p1.id,
                classId,
                subjectId: subjectA,
                dayOfWeek: 1,
            },
            {
                teacherTimetableTemplateId: templateId,
                schoolTimetableSlotId: p2.id,
                classId,
                subjectId: subjectB,
                dayOfWeek: 1,
            },
            {
                teacherTimetableTemplateId: templateId,
                schoolTimetableSlotId: p1.id,
                classId,
                subjectId: subjectB,
                dayOfWeek: 3,
            },
            {
                teacherTimetableTemplateId: templateId,
                schoolTimetableSlotId: p3.id,
                classId,
                subjectId: subjectA,
                dayOfWeek: 5,
            },
        ];

        const { error: entryError } = await supabase
            .from("TeacherTimetableEntry")
            .insert(entries);

        if (entryError) {
            console.error("Error seeding timetable entries for school", schoolId, entryError);
        }
    } catch (err) {
        console.error("Failed to seed timetable config for school", schoolId, err);
    }
}

async function main() {
    try {
        const clerk = clerkClient();
        await cleanClerk();
        await cleanSupabase();
        const adminInfo = await seedAdmin();

        if (!adminInfo) {
            console.error("No Admin user found. Seed aborted.");
            return;
        }

        const { adminId, defaultSchoolId } = adminInfo;

        // Populate School directory from CSV (for My Schools / selection)
        await seedSchoolDirectory(adminId);

        console.log("Seeding Grades and Subjects...");
        const grades = [1, 2, 3, 4, 5, 6].map((level) => ({ id: level, level }));
        await supabase.from("Grade").insert(grades);

        const subjectsArray = [
            { id: 1, name: "Mathematics", schoolId: defaultSchoolId },
            { id: 2, name: "Science", schoolId: defaultSchoolId },
            { id: 3, name: "English", schoolId: defaultSchoolId },
            { id: 4, name: "History", schoolId: defaultSchoolId },
            { id: 5, name: "Geography", schoolId: defaultSchoolId },
            { id: 6, name: "Physics", schoolId: defaultSchoolId },
            { id: 7, name: "Chemistry", schoolId: defaultSchoolId },
            { id: 8, name: "Biology", schoolId: defaultSchoolId },
            { id: 9, name: "Computer Science", schoolId: defaultSchoolId },
            { id: 10, name: "Art", schoolId: defaultSchoolId },
        ];
        await supabase.from("Subject").insert(subjectsArray);

        console.log("Creating 15 Managed Teachers in Default School...");
        const teacherMap: Record<number, string> = {};
        for (let i = 1; i <= 15; i++) {
            const user = await clerk.users.createUser({
                username: `teacher${i}`,
                password: PASSWORD,
                firstName: `TName${i}`,
                lastName: `TSurname${i}`,
                publicMetadata: { role: "teacher" }
            });
            teacherMap[i] = user.id;

            await supabase.from("Teacher").insert({
                id: user.id,
                username: `teacher${i}`,
                name: `TName${i}`,
                surname: `TSurname${i}`,
                email: `teacher${i}@example.com`,
                phone: `123-456-789${i}`,
                address: `Address${i}`,
                bloodType: "A+",
                sex: i % 2 === 0 ? "MALE" : "FEMALE",
                birthday: "1996-02-27T00:26:35.280Z"
            });

            await supabase.from("TeacherSchool").insert({
                teacherId: user.id,
                schoolId: defaultSchoolId,
                isManaged: true
            });

            await supabase.from("TeacherSubject").insert([
                { subjectId: (i % 10) + 1, teacherId: user.id, isPrimary: true },
                { subjectId: ((i + 1) % 10) + 1, teacherId: user.id }
            ]);
        }

        console.log("Creating Independent Teacher & Test School...");
        const independentUser = await clerk.users.createUser({
            username: "independent1",
            password: PASSWORD,
            firstName: "Indy",
            lastName: "Teacher",
            publicMetadata: { role: "teacher", teacherType: "INDEPENDENT" },
        });

        await supabase.from("Teacher").insert({
            id: independentUser.id,
            username: "independent1",
            name: "Indy",
            surname: "Teacher",
            email: "independent1@example.com",
            phone: "123-456-7890",
            address: "Independent Street 1",
            bloodType: "A+",
            sex: "FEMALE",
            birthday: "1990-01-01T00:00:00.000Z",
        });

        const independentSchoolId = "independent-school-1";
        await supabase.from("School").upsert({
            id: independentSchoolId,
            name: "Independent School 1",
            type: "INDEPENDENT",
            adminId: independentUser.id,
        });

        await supabase.from("TeacherSchool").insert({
            teacherId: independentUser.id,
            schoolId: independentSchoolId,
            isManaged: false,
        });

        // Optional: basic schedule indicating this teacher works at their independent school on weekdays
        await supabase.from("TeacherSchoolSchedule").insert({
            teacherId: independentUser.id,
            schoolId: independentSchoolId,
            startDate: "2026-01-01T00:00:00.000Z",
            endDate: "2026-12-31T00:00:00.000Z",
            daysOfWeek: [1, 2, 3, 4, 5],
        });

        const independentSubjects = [
            { id: 1001, name: "Indy Mathematics", schoolId: independentSchoolId },
            { id: 1002, name: "Indy English", schoolId: independentSchoolId },
        ];
        await supabase.from("Subject").insert(independentSubjects);

        await supabase.from("TeacherSubject").insert([
            { subjectId: 1001, teacherId: independentUser.id, isPrimary: true },
            { subjectId: 1002, teacherId: independentUser.id },
        ]);

        console.log("Creating Agency Teacher & Test Agency School...");
        const agencyUser = await clerk.users.createUser({
            username: "agency1",
            password: PASSWORD,
            firstName: "Agen",
            lastName: "Teacher",
            publicMetadata: { role: "teacher", teacherType: "AGENCY" },
        });

        await supabase.from("Teacher").insert({
            id: agencyUser.id,
            username: "agency1",
            name: "Agen",
            surname: "Teacher",
            email: "agency1@example.com",
            phone: "987-654-3210",
            address: "Agency Road 1",
            bloodType: "B+",
            sex: "MALE",
            birthday: "1988-05-15T00:00:00.000Z",
        });

        const agencySchoolId = "agency-school-1";
        await supabase.from("School").upsert({
            id: agencySchoolId,
            name: "Agency School 1",
            type: "AGENCY",
            adminId: agencyUser.id,
        });

        await supabase.from("TeacherSchool").insert({
            teacherId: agencyUser.id,
            schoolId: agencySchoolId,
            isManaged: false,
        });

        await supabase.from("TeacherSchoolSchedule").insert({
            teacherId: agencyUser.id,
            schoolId: agencySchoolId,
            startDate: "2026-01-01T00:00:00.000Z",
            endDate: "2026-12-31T00:00:00.000Z",
            daysOfWeek: [1, 3, 5], // Example: Mon, Wed, Fri
        });

        const agencySubjects = [
            { id: 1003, name: "Agency Mathematics", schoolId: agencySchoolId },
            { id: 1004, name: "Agency English", schoolId: agencySchoolId },
        ];
        await supabase.from("Subject").insert(agencySubjects);

        await supabase.from("TeacherSubject").insert([
            { subjectId: 1003, teacherId: agencyUser.id, isPrimary: true },
            { subjectId: 1004, teacherId: agencyUser.id },
        ]);

        console.log("Creating additional Independent & Agency test teachers (blank setups)...");
        const independentUser2 = await clerk.users.createUser({
            username: "independent2",
            password: PASSWORD,
            firstName: "Indy",
            lastName: "Teacher2",
            publicMetadata: { role: "teacher", teacherType: "INDEPENDENT" },
        });

        await supabase.from("Teacher").insert({
            id: independentUser2.id,
            username: "independent2",
            name: "Indy",
            surname: "Teacher2",
            email: "independent2@example.com",
            phone: "123-456-7891",
            address: "Independent Street 2",
            bloodType: "A+",
            sex: "MALE",
            birthday: "1992-01-01T00:00:00.000Z",
        });

        const independentBlankSchoolId = "independent-school-2";
        await supabase.from("School").upsert({
            id: independentBlankSchoolId,
            name: "Independent School 2 (Blank)",
            type: "INDEPENDENT",
            adminId: independentUser2.id,
        });

        await supabase.from("TeacherSchool").insert({
            teacherId: independentUser2.id,
            schoolId: independentBlankSchoolId,
            isManaged: false,
        });

        await supabase.from("TeacherSchoolSchedule").insert({
            teacherId: independentUser2.id,
            schoolId: independentBlankSchoolId,
            startDate: "2026-01-01T00:00:00.000Z",
            endDate: "2026-12-31T00:00:00.000Z",
            daysOfWeek: [1, 2, 3, 4, 5],
        });

        const agencyUser2 = await clerk.users.createUser({
            username: "agency2",
            password: PASSWORD,
            firstName: "Agen",
            lastName: "Teacher2",
            publicMetadata: { role: "teacher", teacherType: "AGENCY" },
        });

        await supabase.from("Teacher").insert({
            id: agencyUser2.id,
            username: "agency2",
            name: "Agen",
            surname: "Teacher2",
            email: "agency2@example.com",
            phone: "987-654-3211",
            address: "Agency Road 2",
            bloodType: "B+",
            sex: "FEMALE",
            birthday: "1989-05-15T00:00:00.000Z",
        });

        const agencyBlankSchoolId = "agency-school-2";
        await supabase.from("School").upsert({
            id: agencyBlankSchoolId,
            name: "Agency School 2 (Blank)",
            type: "AGENCY",
            adminId: agencyUser2.id,
        });

        await supabase.from("TeacherSchool").insert({
            teacherId: agencyUser2.id,
            schoolId: agencyBlankSchoolId,
            isManaged: false,
        });

        await supabase.from("TeacherSchoolSchedule").insert({
            teacherId: agencyUser2.id,
            schoolId: agencyBlankSchoolId,
            startDate: "2026-01-01T00:00:00.000Z",
            endDate: "2026-12-31T00:00:00.000Z",
            daysOfWeek: [2, 4], // Example: Tue, Thu
        });

        console.log("Creating 6 Classes for default school...");
        const classesArray = [
            { id: 1, name: "1A", gradeId: 1, capacity: 20, supervisorId: teacherMap[1], schoolId: defaultSchoolId },
            { id: 2, name: "2A", gradeId: 2, capacity: 20, supervisorId: teacherMap[2], schoolId: defaultSchoolId },
            { id: 3, name: "3A", gradeId: 3, capacity: 20, supervisorId: teacherMap[3], schoolId: defaultSchoolId },
            { id: 4, name: "4A", gradeId: 4, capacity: 20, supervisorId: teacherMap[4], schoolId: defaultSchoolId },
            { id: 5, name: "5A", gradeId: 5, capacity: 20, supervisorId: teacherMap[5], schoolId: defaultSchoolId },
            { id: 6, name: "6A", gradeId: 6, capacity: 20, supervisorId: teacherMap[1], schoolId: defaultSchoolId },
        ];
        await supabase.from("Class").insert(classesArray);

        console.log("Creating test classes for Independent and Agency schools...");
        const independentClassId = 1001;
        const agencyClassId = 2001;

        await supabase.from("Class").insert([
            {
                id: independentClassId,
                name: "Indy Class 1",
                gradeId: 1,
                capacity: 25,
                supervisorId: independentUser.id,
                schoolId: independentSchoolId,
            },
            {
                id: agencyClassId,
                name: "Agency Class 1",
                gradeId: 1,
                capacity: 25,
                supervisorId: agencyUser.id,
                schoolId: agencySchoolId,
            },
        ]);

        console.log("Seeding basic timetable config for Independent and Agency test schools...");
        await seedTestTimetableForSchool(
            independentSchoolId,
            independentUser.id,
            1001,
            [1001, 1002],
        );
        await seedTestTimetableForSchool(
            agencySchoolId,
            agencyUser.id,
            2001,
            [1003, 1004],
        );

        console.log("Creating 25 Parents...");
        const parentMap: Record<number, string> = {};
        for (let i = 1; i <= 25; i++) {
            const user = await clerk.users.createUser({
                username: `parent${i}`,
                password: PASSWORD,
                firstName: `PName${i}`,
                lastName: `PSurname${i}`,
                publicMetadata: { role: "parent" }
            });
            parentMap[i] = user.id;

            await supabase.from("Parent").insert({
                id: user.id,
                username: `parent${i}`,
                name: `PName${i}`,
                surname: `PSurname${i}`,
                email: `parent${i}@example.com`,
                phone: `123-456-789${i}`,
                address: `Address${i}`,
                schoolId: defaultSchoolId
            });
        }

        console.log("Creating 50 Students...");
        const studentMap: Record<number, string> = {};
        for (let i = 1; i <= 50; i++) {
            const user = await clerk.users.createUser({
                username: `student${i}`,
                password: PASSWORD,
                firstName: `SName${i}`,
                lastName: `SSurname${i}`,
                publicMetadata: { role: "student" }
            });
            studentMap[i] = user.id;

            const classInfo = classesArray[(i % 6)];
            await supabase.from("Student").insert({
                id: user.id,
                username: `student${i}`,
                name: `SName${i}`,
                surname: `SSurname${i}`,
                email: `student${i}@example.com`,
                phone: `987-654-321${i}`,
                address: `Address${i}`,
                bloodType: "O-",
                sex: i % 2 === 0 ? "MALE" : "FEMALE",
                parentId: parentMap[(i % 25) + 1],
                gradeId: classInfo.gradeId,
                birthday: "2016-02-27T00:26:35.281Z",
                schoolId: defaultSchoolId
            });
            await supabase.from("StudentClass").insert({
                studentId: user.id,
                classId: classInfo.id
            });
        }

        console.log("Exporting User IDs to seed-data.json...");
        const seedDataPath = path.join(process.cwd(), "scripts", "seed-data.json");
        const seedData = {
            teacherMap,
            parentMap,
            studentMap,
            classes: classesArray,
            defaultSchoolId,
            independentTeacherId: independentUser.id,
            independentSchoolId,
            agencyTeacherId: agencyUser.id,
            agencySchoolId,
        };
        fs.writeFileSync(seedDataPath, JSON.stringify(seedData, null, 2));

        console.log("User generation complete! Saved to seed-data.json.");

        /*
        const daysOfWeek: ("MONDAY" | "TUESDAY" | "WEDNESDAY" | "THURSDAY" | "FRIDAY")[] = ["MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY"];
        for (let i = 1; i <= 30; i++) {
            const classIndex = i % 6;
            const classInfo = classesArray[classIndex];

            const teacherIndex = (i % 15) + 1;
            const teacherId = teacherMap[teacherIndex];
            const subjectId = (teacherIndex % 10) + 1;

            // Distribute across 5 days (Monday to Friday)
            const dayIndex = i % 5;
            const dayName = daysOfWeek[dayIndex];

            // Distribute across 6 periods (e.g., 8:00 AM to 2:00 PM)
            const periodIndex = (i % 6);

            // Base date (a Monday): 2026-02-23T00:00:00.000Z
            const lessonDate = new Date("2026-02-23T00:00:00.000Z");
            lessonDate.setDate(lessonDate.getDate() + dayIndex);

            // Create start time and end time (1 hour lesson)
            const startHour = 8 + periodIndex;
            const startTime = new Date(lessonDate);
            startTime.setUTCHours(startHour, 0, 0, 0);

            const endTime = new Date(lessonDate);
            endTime.setUTCHours(startHour + 1, 0, 0, 0);

            await supabase.from("Lesson").insert({
                id: i,
                name: `Lesson${i}`,
                day: dayName,
                startTime: startTime.toISOString(),
                endTime: endTime.toISOString(),
                subjectId: subjectId,
                classId: classInfo.id,
                teacherId: teacherId
            });

            await supabase.from("Exam").insert({
                id: i,
                title: `Exam ${i}`,
                startTime: startTime.toISOString(),
                endTime: endTime.toISOString(),
                lessonId: i
            });

            await supabase.from("Assignment").insert({
                id: i,
                title: `Assignment ${i}`,
                startDate: startTime.toISOString(),
                dueDate: new Date(startTime.getTime() + 7 * 24 * 60 * 60 * 1000).toISOString(), // Due in 7 days
                lessonId: i
            });

            // Result requires a student from the class 'classIndex'.
            // Student 'j' is in class 'j % 6'.
            const studentBase = classIndex === 0 ? 6 : classIndex;
            const studentIndex = studentBase + 6 * (i % 8); // Ensures variation 1-48

            await supabase.from("Result").insert({
                id: i,
                score: 90 + (i % 10),
                studentId: studentMap[studentIndex],
                examId: i
            });
        }

        */

    } catch (err) {
        console.error("Seed error:", err);
    }
}

main();