import bcrypt from 'bcrypt';
import crypto from 'crypto';
import { pool } from '../db.js';

export async function seedUsers() {
    console.log('👤 Seeding users (Core Architecture)...');

    try {
        // Fetch core companies to map users
        const companiesResult = await pool.query('SELECT id, name FROM core_companies');
        const companyMap = {}; // name -> id
        companiesResult.rows.forEach(c => companyMap[c.name] = c.id);
        const systemTenantId = '00000000-0000-0000-0000-000000000000';

        // 1. Create SuperAdmin (Requested: superadmin / Admin@2025!)
        const superAdminPassword = await bcrypt.hash('Admin@2025!', 10);
        const superAdminId = crypto.randomUUID();
        // User requested identifier 'superadmin'
        const superAdminIdentifier = 'superadmin';

        const result = await pool.query(`
            INSERT INTO core_users (id, tenant_id, name, email, password_hash, status)
            VALUES ($1, $2, $3, $4, $5, 'ACTIVE')
            ON CONFLICT (tenant_id, email) DO UPDATE SET password_hash = EXCLUDED.password_hash
            RETURNING id
        `, [superAdminId, systemTenantId, 'System Administrator', superAdminIdentifier, superAdminPassword]);

        const actualSuperAdminId = result.rows[0].id;

        // Role
        await pool.query(`
            INSERT INTO core_user_roles (user_id, role)
            VALUES ($1, 'superadmin')
            ON CONFLICT (user_id, role) DO NOTHING
        `, [actualSuperAdminId]);

        console.log('   ✓ SuperAdmin created (superadmin)');

        // 2. Create Company Admins
        const companyAdmins = [
            // Requested: takeshi_yamamoto / Takeshi@2025 (Company Admin)
            { identifier: 'takeshi_yamamoto', fullName: 'Takeshi Yamamoto', company: 'TechCorp', email: 'takeshi_yamamoto', pass: 'Takeshi@2025', roles: ['admin', 'company'] },
            { identifier: 'kenji', fullName: 'Kenji Tanaka', company: 'AppMakers', email: 'kenji@appmakers.mobile', pass: 'Takeshi@2025', roles: ['admin', 'company'] },
            // Requested: maria_santos / User@2025 (Recruiter) - Placing in DesignHub
            { identifier: 'maria_santos', fullName: 'Maria Santos', company: 'DesignHub', email: 'maria_santos', pass: 'User@2025', roles: ['recruiter', 'company'] }
        ];

        for (const admin of companyAdmins) {
            const hash = await bcrypt.hash(admin.pass, 10);
            const userId = crypto.randomUUID();
            const tenantId = companyMap[admin.company];

            if (!tenantId) {
                console.warn(`Original company ${admin.company} not found for user ${admin.fullName}, skipping.`);
                continue;
            }

            const result = await pool.query(`
                INSERT INTO core_users (id, tenant_id, name, email, password_hash, status)
                VALUES ($1, $2, $3, $4, $5, 'ACTIVE')
                ON CONFLICT (tenant_id, email) DO UPDATE SET password_hash = EXCLUDED.password_hash
                RETURNING id
            `, [userId, tenantId, admin.fullName, admin.email, hash]);

            const actualUserId = result.rows[0].id;

            for (const role of admin.roles) {
                await pool.query(`
                    INSERT INTO core_user_roles (user_id, role)
                    VALUES ($1, $2)
                    ON CONFLICT (user_id, role) DO NOTHING
                `, [actualUserId, role]);
            }

            console.log(`   ✓ User created: ${admin.email}`);
        }

        // 3. Create Candidates (Job Seekers)
        // Requested: paulo_santos / User@2025
        const candidates = [
            { fullName: 'Paulo Santos', email: 'paulo_santos', pass: 'User@2025' },
            { fullName: 'Maria Reyes', email: 'maria@email.com', pass: 'User@2025' }
        ];

        for (const cand of candidates) {
            const hash = await bcrypt.hash(cand.pass, 10);
            const userId = crypto.randomUUID();

            const result = await pool.query(`
                INSERT INTO core_users (id, tenant_id, name, email, password_hash, status)
                VALUES ($1, $2, $3, $4, $5, 'ACTIVE')
                ON CONFLICT (tenant_id, email) DO UPDATE SET password_hash = EXCLUDED.password_hash
                RETURNING id
            `, [userId, systemTenantId, cand.fullName, cand.email, hash]);

            const actualUserId = result.rows[0].id;

            await pool.query(`
                INSERT INTO core_user_roles (user_id, role)
                VALUES ($1, 'candidate')
                ON CONFLICT (user_id, role) DO NOTHING
            `, [actualUserId]);
            console.log(`   ✓ Candidate created: ${cand.email}`);
        }

        console.log('👤 Seeding legacy candidates...');

        const legacyCandidates = [
            {
                identifier: 'ana_silva',
                fullName: 'Ana Silva',
                email: 'ana.silva@example.com',
                phone: '+55 11 98765-4321',
                city: 'São Paulo',
                state: 'SP',
                title: 'Full Stack Developer',
                experience: '5 years of experience',
                skills: ['React', 'Node.js', 'TypeScript', 'AWS', 'Docker'],
                bio: 'Developer passionate about building innovative solutions. Experience in React, Node.js, and cloud computing.',
                objective: 'Grow as a full stack developer building scalable products.'
            },
            {
                identifier: 'carlos_santos',
                fullName: 'Carlos Santos',
                email: 'carlos.santos@example.com',
                phone: '+55 11 91234-5678',
                city: 'Rio de Janeiro',
                state: 'RJ',
                title: 'UX/UI Designer',
                experience: '3 years of experience',
                skills: ['Figma', 'Adobe XD', 'UI Design', 'Prototyping', 'Design Systems'],
                bio: 'Designer focused on creating memorable experiences. Specialist in design systems and prototyping.',
                objective: 'Design intuitive experiences for web and mobile products.'
            },
            {
                identifier: 'maria_oliveira',
                fullName: 'Maria Oliveira',
                email: 'maria.oliveira@example.com',
                phone: '+55 21 99876-5432',
                city: 'Belo Horizonte',
                state: 'MG',
                title: 'Data Engineer',
                experience: '7 years of experience',
                skills: ['Python', 'SQL', 'Spark', 'Machine Learning', 'Data Visualization'],
                bio: 'Data engineer with a strong background in machine learning and big data. Passionate about turning data into insights.',
                objective: 'Build robust data pipelines and analytics products.'
            },
            {
                identifier: 'pedro_costa',
                fullName: 'Pedro Costa',
                email: 'pedro.costa@example.com',
                phone: '+55 31 98765-1234',
                city: 'Curitiba',
                state: 'PR',
                title: 'Product Manager',
                experience: '6 years of experience',
                skills: ['Product Management', 'Agile', 'Scrum', 'Data Analysis', 'User Research'],
                bio: 'Product Manager with experience in digital products and agile methodologies. Focused on delivering user value.',
                objective: 'Lead cross-functional teams to deliver customer-centric products.'
            },
            {
                identifier: 'juliana_ferreira',
                fullName: 'Juliana Ferreira',
                email: 'juliana.ferreira@example.com',
                phone: '+55 41 91234-8765',
                city: 'Porto Alegre',
                state: 'RS',
                title: 'DevOps Engineer',
                experience: '4 years of experience',
                skills: ['Docker', 'Kubernetes', 'AWS', 'Terraform', 'CI/CD'],
                bio: 'DevOps engineer specialized in automation and cloud infrastructure. Experience with Kubernetes and CI/CD.',
                objective: 'Improve delivery pipelines and cloud reliability.'
            }
        ];

        for (const cand of legacyCandidates) {
            const hash = await bcrypt.hash('User@2025', 10);
            await pool.query(`
                INSERT INTO users (
                    identifier,
                    password_hash,
                    role,
                    full_name,
                    email,
                    phone,
                    city,
                    state,
                    title,
                    experience,
                    skills,
                    objective,
                    bio
                ) VALUES ($1, $2, 'jobSeeker', $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)
                ON CONFLICT (identifier) DO UPDATE SET
                    full_name = EXCLUDED.full_name,
                    email = EXCLUDED.email,
                    phone = EXCLUDED.phone,
                    city = EXCLUDED.city,
                    state = EXCLUDED.state,
                    title = EXCLUDED.title,
                    experience = EXCLUDED.experience,
                    skills = EXCLUDED.skills,
                    objective = EXCLUDED.objective,
                    bio = EXCLUDED.bio
            `, [
                cand.identifier,
                hash,
                cand.fullName,
                cand.email,
                cand.phone,
                cand.city,
                cand.state,
                cand.title,
                cand.experience,
                cand.skills,
                cand.objective,
                cand.bio
            ]);
            console.log(`   ✓ Legacy candidate created: ${cand.email}`);
        }

    } catch (error) {
        console.error('   ❌ Error seeding users:', error.message);
        throw error;
    }
}