-- =============================================================================
-- Pragativeer Full Schema Sync + Demo User Seed Migration
-- File: migrations/001_full_schema_sync.sql
--
-- HOW TO RUN:
--   Windows:  .\migrate.bat migrations\001_full_schema_sync.sql
--   Linux/Mac (server): ./migrate.sh migrations/001_full_schema_sync.sql
--
-- This script is 100% idempotent (safe to run multiple times).
-- Uses IF NOT EXISTS everywhere so already-applied changes are silently skipped.
-- Uses ON CONFLICT DO UPDATE to correctly fix any demo user data mismatches.
-- =============================================================================

-- ── ENUM TYPES ─────────────────────────────────────────────────────────────────
-- All enum values in DB are UPPERCASE (e.g. FREE, PRO, AI_COACH, JEE_MAIN)

DO $$ BEGIN
    CREATE TYPE classenum AS ENUM ('ELEVENTH', 'TWELFTH', 'DROPPER');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
    CREATE TYPE examenum AS ENUM ('JEE_MAIN', 'JEE_ADVANCED', 'NEET', 'JEE_NEET');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
    ALTER TYPE examenum ADD VALUE IF NOT EXISTS 'JEE_NEET';
EXCEPTION WHEN others THEN NULL; END $$;

DO $$ BEGIN
    CREATE TYPE mediumenum AS ENUM ('ENGLISH', 'HINDI', 'BILINGUAL');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
    CREATE TYPE tierenum AS ENUM ('FREE', 'PRO', 'AI_COACH');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
    CREATE TYPE questiontypeenum AS ENUM ('MCQ_SINGLE', 'MCQ_MULTIPLE', 'NUMERICAL');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
    CREATE TYPE sourcetypeenum AS ENUM ('DPS', 'TEST', 'MICROTEST');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
    CREATE TYPE errortypeenum AS ENUM ('CONCEPTUAL', 'CALCULATION', 'READING', 'TIME_PRESSURE');
EXCEPTION WHEN duplicate_object THEN NULL; END $$;


-- ── TABLE: user ────────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS "user" (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    email TEXT UNIQUE,
    phone TEXT UNIQUE,
    password_hash TEXT NOT NULL,
    name TEXT NOT NULL,
    student_class classenum NOT NULL,
    target_exam examenum NOT NULL,
    medium mediumenum NOT NULL,
    school TEXT,
    city TEXT NOT NULL,
    state TEXT NOT NULL,
    tier tierenum NOT NULL DEFAULT 'FREE',
    trial_end TIMESTAMP WITHOUT TIME ZONE,
    subscription_end TIMESTAMP WITHOUT TIME ZONE,
    profile_image_url TEXT,
    streak_count INTEGER NOT NULL DEFAULT 0,
    longest_streak INTEGER NOT NULL DEFAULT 0,
    created_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now(),
    last_active TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now(),
    active_session_token TEXT
);

ALTER TABLE "user"
    ADD COLUMN IF NOT EXISTS trial_end TIMESTAMP WITHOUT TIME ZONE,
    ADD COLUMN IF NOT EXISTS subscription_end TIMESTAMP WITHOUT TIME ZONE,
    ADD COLUMN IF NOT EXISTS profile_image_url TEXT,
    ADD COLUMN IF NOT EXISTS streak_count INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS longest_streak INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS active_session_token TEXT,
    ADD COLUMN IF NOT EXISTS school TEXT;


-- ── TABLE: parent ─────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS parent (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    email TEXT NOT NULL,
    phone TEXT NOT NULL,
    password_hash TEXT NOT NULL,
    name TEXT NOT NULL,
    language TEXT NOT NULL DEFAULT 'English',
    linked_students JSONB NOT NULL DEFAULT '[]',
    created_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now()
);

ALTER TABLE parent
    ADD COLUMN IF NOT EXISTS language TEXT NOT NULL DEFAULT 'English',
    ADD COLUMN IF NOT EXISTS linked_students JSONB NOT NULL DEFAULT '[]';


-- ── TABLE: question ───────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS question (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    subject TEXT NOT NULL,
    topic TEXT NOT NULL,
    subtopic TEXT NOT NULL,
    difficulty TEXT NOT NULL,
    type questiontypeenum NOT NULL,
    question_text TEXT NOT NULL,
    question_text_hi TEXT,
    options JSONB,
    options_hi JSONB,
    correct_answer JSONB NOT NULL,
    solution_text TEXT NOT NULL,
    solution_text_hi TEXT,
    language mediumenum NOT NULL,
    year INTEGER,
    exam examenum,
    tags TEXT,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    created_by UUID NOT NULL,
    verified_by UUID
);

ALTER TABLE question
    ADD COLUMN IF NOT EXISTS question_text_hi TEXT,
    ADD COLUMN IF NOT EXISTS options_hi JSONB,
    ADD COLUMN IF NOT EXISTS solution_text_hi TEXT,
    ADD COLUMN IF NOT EXISTS tags TEXT,
    ADD COLUMN IF NOT EXISTS verified_by UUID;


-- ── TABLE: dps ────────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS dps (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    date DATE NOT NULL,
    title TEXT NOT NULL,
    questions JSONB NOT NULL DEFAULT '[]',
    difficulty TEXT NOT NULL,
    time_limit INTEGER NOT NULL,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    created_by UUID NOT NULL
);


-- ── TABLE: test ───────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS test (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    title TEXT NOT NULL,
    type TEXT NOT NULL,
    exam_pattern examenum NOT NULL,
    sections JSONB NOT NULL,
    total_time INTEGER NOT NULL,
    difficulty TEXT NOT NULL,
    scheduled_date TIMESTAMP WITHOUT TIME ZONE,
    end_date TIMESTAMP WITHOUT TIME ZONE,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    created_by UUID NOT NULL
);

ALTER TABLE test
    ADD COLUMN IF NOT EXISTS end_date TIMESTAMP WITHOUT TIME ZONE;


-- ── TABLE: transaction ────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS transaction (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES "user"(id),
    amount DOUBLE PRECISION NOT NULL,
    tier TEXT NOT NULL,
    status TEXT NOT NULL,
    created_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now()
);


-- ── TABLE: coupon ─────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS coupon (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    code TEXT UNIQUE NOT NULL,
    discount_percent DOUBLE PRECISION NOT NULL,
    max_discount_amount DOUBLE PRECISION NOT NULL,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    expires_at TIMESTAMP WITHOUT TIME ZONE,
    created_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now()
);


-- ── TABLE: attempt ────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS attempt (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES "user"(id),
    source_type sourcetypeenum NOT NULL,
    source_id UUID NOT NULL,
    started_at TIMESTAMP WITHOUT TIME ZONE NOT NULL,
    submitted_at TIMESTAMP WITHOUT TIME ZONE,
    time_taken INTEGER,
    answers JSONB,
    score INTEGER NOT NULL DEFAULT 0,
    total_questions INTEGER NOT NULL,
    accuracy DOUBLE PRECISION NOT NULL DEFAULT 0.0,
    status TEXT NOT NULL DEFAULT 'In_Progress',
    is_retake BOOLEAN NOT NULL DEFAULT FALSE
);

ALTER TABLE attempt
    ADD COLUMN IF NOT EXISTS is_retake BOOLEAN NOT NULL DEFAULT FALSE;


-- ── TABLE: mistake ────────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS mistake (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES "user"(id),
    question_id UUID NOT NULL REFERENCES question(id),
    attempt_id UUID NOT NULL REFERENCES attempt(id),
    error_type errortypeenum NOT NULL,
    topic TEXT NOT NULL,
    subtopic TEXT NOT NULL,
    next_review TIMESTAMP WITHOUT TIME ZONE NOT NULL,
    review_count INTEGER NOT NULL DEFAULT 0,
    consecutive_correct INTEGER NOT NULL DEFAULT 0,
    is_mastered BOOLEAN NOT NULL DEFAULT FALSE,
    created_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now()
);

ALTER TABLE mistake
    ADD COLUMN IF NOT EXISTS consecutive_correct INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS is_mastered BOOLEAN NOT NULL DEFAULT FALSE;


-- ── TABLE: studyplan ──────────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS studyplan (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES "user"(id),
    date DATE NOT NULL,
    tasks JSONB NOT NULL,
    is_completed BOOLEAN NOT NULL DEFAULT FALSE,
    generated_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now(),
    feedback TEXT
);

ALTER TABLE studyplan
    ADD COLUMN IF NOT EXISTS feedback TEXT;


-- ── TABLE: subscription ───────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS subscription (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES "user"(id),
    tier tierenum NOT NULL,
    billing_cycle TEXT NOT NULL,
    start_date TIMESTAMP WITHOUT TIME ZONE NOT NULL,
    end_date TIMESTAMP WITHOUT TIME ZONE NOT NULL,
    amount INTEGER NOT NULL,
    payment_id TEXT NOT NULL,
    status TEXT NOT NULL,
    auto_renew BOOLEAN NOT NULL DEFAULT TRUE,
    coupon_code TEXT
);

ALTER TABLE subscription
    ADD COLUMN IF NOT EXISTS coupon_code TEXT,
    ADD COLUMN IF NOT EXISTS auto_renew BOOLEAN NOT NULL DEFAULT TRUE;


-- ── TABLE: systemsettings ─────────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS systemsettings (
    id TEXT PRIMARY KEY DEFAULT 'global',
    maintenance_mode BOOLEAN NOT NULL DEFAULT FALSE,
    allow_new_registrations BOOLEAN NOT NULL DEFAULT TRUE,
    enable_free_trial BOOLEAN NOT NULL DEFAULT TRUE,
    trial_duration_days INTEGER NOT NULL DEFAULT 15,
    trial_tier tierenum NOT NULL DEFAULT 'AI_COACH',
    updated_at TIMESTAMP WITHOUT TIME ZONE NOT NULL DEFAULT now()
);

ALTER TABLE systemsettings
    ADD COLUMN IF NOT EXISTS enable_free_trial BOOLEAN NOT NULL DEFAULT TRUE,
    ADD COLUMN IF NOT EXISTS trial_duration_days INTEGER NOT NULL DEFAULT 15,
    ADD COLUMN IF NOT EXISTS trial_tier tierenum NOT NULL DEFAULT 'AI_COACH';

INSERT INTO systemsettings (id, maintenance_mode, allow_new_registrations, enable_free_trial, trial_duration_days, trial_tier, updated_at)
VALUES ('global', FALSE, TRUE, TRUE, 15, 'AI_COACH', now())
ON CONFLICT (id) DO NOTHING;


-- =============================================================================
-- DEMO USER SEED / FIX
-- These 4 rows are the canonical demo accounts used by the frontend switcher.
-- ON CONFLICT DO UPDATE ensures the server is always in sync with the correct
-- name, tier, target_exam, and streak — regardless of what was in the DB before.
-- password_hash below is bcrypt of "PragatiVeer@Demo2026" (12 rounds).
-- =============================================================================

INSERT INTO "user" (
    id, email, phone, password_hash, name,
    student_class, target_exam, medium,
    school, city, state,
    tier, trial_end, subscription_end,
    streak_count, longest_streak,
    created_at, last_active
)
VALUES
    -- Demo 1: Aarav — AI Coach, JEE (id: 11111111...)
    (
        '11111111-1111-1111-1111-111111111111',
        'aarav.demo@pragativeer.com',
        '9911111111',
        '$2b$12$LQv3c1yqBWVHxkd0LHAkCOYz6TtxMoJ8zYTvNiG0HGkY0P6YOHRV6',
        'Aarav',
        'TWELFTH', 'JEE_MAIN', 'ENGLISH',
        'DPS RK Puram', 'New Delhi', 'Delhi',
        'AI_COACH', NULL, NULL,
        7, 7,
        now(), now()
    ),
    -- Demo 2: Neha — AI Coach, NEET (id: 22222222...)
    (
        '22222222-2222-2222-2222-222222222222',
        'neha.demo@pragativeer.com',
        '9922222222',
        '$2b$12$LQv3c1yqBWVHxkd0LHAkCOYz6TtxMoJ8zYTvNiG0HGkY0P6YOHRV6',
        'Neha',
        'TWELFTH', 'NEET', 'ENGLISH',
        'St. Stephens', 'Mumbai', 'Maharashtra',
        'AI_COACH', NULL, NULL,
        15, 21,
        now(), now()
    ),
    -- Demo 3: Rohan — AI Coach, JEE+NEET (id: 33333333...)
    (
        '33333333-3333-3333-3333-333333333333',
        'rohan.demo@pragativeer.com',
        '9933333333',
        '$2b$12$LQv3c1yqBWVHxkd0LHAkCOYz6TtxMoJ8zYTvNiG0HGkY0P6YOHRV6',
        'Rohan',
        'DROPPER', 'JEE_NEET', 'ENGLISH',
        'Allen Kota', 'Kota', 'Rajasthan',
        'AI_COACH', NULL, NULL,
        1, 1,
        now(), now()
    ),
    -- Demo 4: Amit — Free Plan, JEE (id: 44444444...)
    -- Trial ends 15 days from now so the trial banner shows correctly
    (
        '44444444-4444-4444-4444-444444444444',
        'amit.demo@pragativeer.com',
        '9944444444',
        '$2b$12$LQv3c1yqBWVHxkd0LHAkCOYz6TtxMoJ8zYTvNiG0HGkY0P6YOHRV6',
        'Amit',
        'ELEVENTH', 'JEE_MAIN', 'ENGLISH',
        'Resonance', 'Patna', 'Bihar',
        'FREE', now() + INTERVAL '15 days', NULL,
        1, 1,
        now(), now()
    )
ON CONFLICT (id) DO UPDATE SET
    name          = EXCLUDED.name,
    email         = EXCLUDED.email,
    tier          = EXCLUDED.tier,
    target_exam    = EXCLUDED.target_exam,
    student_class  = EXCLUDED.student_class,
    medium        = EXCLUDED.medium,
    school        = EXCLUDED.school,
    city          = EXCLUDED.city,
    state         = EXCLUDED.state,
    trial_end     = EXCLUDED.trial_end,
    streak_count  = EXCLUDED.streak_count,
    longest_streak = EXCLUDED.longest_streak,
    last_active   = now();