CREATE TABLE IF NOT EXISTS lectures (
  id UUID PRIMARY KEY,
  type VARCHAR(20) NOT NULL CHECK (type IN ('youtube', 'ppt', 'news', 'link', 'video')),
  title TEXT NOT NULL,
  description TEXT NOT NULL DEFAULT '',
  tags TEXT[] NOT NULL DEFAULT '{}',
  youtube_url TEXT,
  file_name TEXT,
  original_name TEXT,
  preview_title TEXT,
  slide_count INTEGER NOT NULL DEFAULT 0,
  thumbnail_url TEXT,
  thumbnail_status VARCHAR(20) NOT NULL DEFAULT 'pending',
  thumbnail_retry_count INTEGER NOT NULL DEFAULT 0,
  thumbnail_error TEXT,
  thumbnail_updated_at TIMESTAMPTZ,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  list_section VARCHAR(20) NOT NULL DEFAULT 'learning',
  news_url TEXT
);

ALTER TABLE lectures DROP CONSTRAINT IF EXISTS lectures_type_check;
ALTER TABLE lectures ADD CONSTRAINT lectures_type_check CHECK (type IN ('youtube', 'ppt', 'news', 'link', 'video'));
ALTER TABLE lectures ADD COLUMN IF NOT EXISTS list_section VARCHAR(20) NOT NULL DEFAULT 'learning';
ALTER TABLE lectures ADD COLUMN IF NOT EXISTS news_url TEXT;

CREATE INDEX IF NOT EXISTS idx_lectures_type_created_at ON lectures (type, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_lectures_created_at ON lectures (created_at DESC);
CREATE INDEX IF NOT EXISTS idx_lectures_tags ON lectures USING GIN (tags);

CREATE OR REPLACE FUNCTION set_lectures_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = NOW();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trg_lectures_updated_at ON lectures;
CREATE TRIGGER trg_lectures_updated_at
BEFORE UPDATE ON lectures
FOR EACH ROW
EXECUTE FUNCTION set_lectures_updated_at();

-- AX 과제 신청 (PDF 양식 기반)
CREATE TABLE IF NOT EXISTS ax_assignments (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  department VARCHAR(200) NOT NULL,
  name VARCHAR(100) NOT NULL,
  employee_id VARCHAR(50),
  position VARCHAR(100),
  phone VARCHAR(50),
  email VARCHAR(200),
  work_process_description TEXT,
  pain_point TEXT,
  current_time_spent VARCHAR(100),
  error_rate_before VARCHAR(100),
  collaboration_depts TEXT,
  reason_to_solve TEXT,
  ai_expectation TEXT,
  output_type TEXT,
  automation_level VARCHAR(50),
  data_readiness VARCHAR(50),
  data_location TEXT,
  personal_info VARCHAR(50),
  data_quality VARCHAR(50),
  data_count VARCHAR(100),
  data_types TEXT[],
  time_reduction VARCHAR(100),
  error_reduction VARCHAR(100),
  volume_increase VARCHAR(100),
  cost_reduction VARCHAR(100),
  response_time VARCHAR(100),
  other_metrics TEXT,
  annual_savings VARCHAR(100),
  labor_replacement VARCHAR(100),
  revenue_increase VARCHAR(100),
  other_effects TEXT,
  qualitative_effects TEXT[],
  tech_stack TEXT[],
  risks TEXT[],
  risk_detail TEXT,
  participation_pledge BOOLEAN DEFAULT false,
  application_file TEXT,
  status VARCHAR(20) NOT NULL DEFAULT '신청',
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

ALTER TABLE ax_assignments ADD COLUMN IF NOT EXISTS application_file TEXT;

CREATE INDEX IF NOT EXISTS idx_ax_assignments_created_at ON ax_assignments (created_at DESC);

CREATE OR REPLACE FUNCTION set_ax_assignments_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = NOW();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trg_ax_assignments_updated_at ON ax_assignments;
CREATE TRIGGER trg_ax_assignments_updated_at
BEFORE UPDATE ON ax_assignments
FOR EACH ROW
EXECUTE FUNCTION set_ax_assignments_updated_at();

-- OPS 이메일(@xavis.co.kr) 매직 링크 인증 — 이벤트 감사 로그
CREATE TABLE IF NOT EXISTS ops_email_auth_events (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  email VARCHAR(320) NOT NULL,
  event_type VARCHAR(40) NOT NULL CHECK (event_type IN ('magic_link_requested', 'login_success', 'logout')),
  ip_address VARCHAR(45),
  user_agent TEXT,
  return_to TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_ops_email_auth_events_email_created ON ops_email_auth_events (email, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_ops_email_auth_events_created ON ops_email_auth_events (created_at DESC);
CREATE INDEX IF NOT EXISTS idx_ops_email_auth_events_event_type ON ops_email_auth_events (event_type);

-- 이메일별 최초·최근 로그인 및 누적 로그인 횟수
CREATE TABLE IF NOT EXISTS ops_email_users (
  email VARCHAR(320) PRIMARY KEY,
  first_seen_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  last_login_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  login_count INTEGER NOT NULL DEFAULT 0
);

CREATE INDEX IF NOT EXISTS idx_ops_email_users_last_login ON ops_email_users (last_login_at DESC);

-- 회의록 AI: 이메일(OPS 세션) 기반 사용자·프롬프트·회의 저장
CREATE TABLE IF NOT EXISTS meeting_ai_users (
  email VARCHAR(320) PRIMARY KEY,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS meeting_ai_prompts (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_email VARCHAR(320) NOT NULL REFERENCES meeting_ai_users(email) ON DELETE CASCADE,
  include_title_line BOOLEAN NOT NULL DEFAULT true,
  include_attendees BOOLEAN NOT NULL DEFAULT true,
  include_summary BOOLEAN NOT NULL DEFAULT true,
  include_action_items BOOLEAN NOT NULL DEFAULT true,
  include_checklist BOOLEAN NOT NULL DEFAULT true,
  custom_instructions TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  CONSTRAINT uq_meeting_ai_prompts_user UNIQUE (user_email)
);

CREATE INDEX IF NOT EXISTS idx_meeting_ai_prompts_user ON meeting_ai_prompts (user_email);

-- 기존 DB: 신규 행 기본값만 갱신(이미 저장된 include_checklist 값은 유지)
ALTER TABLE meeting_ai_prompts ALTER COLUMN include_checklist SET DEFAULT true;

CREATE TABLE IF NOT EXISTS meeting_ai_meetings (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_email VARCHAR(320) NOT NULL REFERENCES meeting_ai_users(email) ON DELETE CASCADE,
  title VARCHAR(500) NOT NULL DEFAULT '',
  source_text TEXT,
  transcript_text TEXT,
  generated_minutes TEXT,
  summary_text TEXT,
  audio_file_path TEXT,
  audio_original_name TEXT,
  chat_model VARCHAR(80) NOT NULL DEFAULT 'gpt-5-mini',
  transcription_model VARCHAR(80),
  meeting_date DATE,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_meeting_ai_meetings_user_created ON meeting_ai_meetings (user_email, created_at DESC);

-- 기존 DB 마이그레이션: 전사에 사용한 OpenAI 모델(gpt-4o-mini-transcribe, gpt-4o-transcribe 등)
ALTER TABLE meeting_ai_meetings ADD COLUMN IF NOT EXISTS transcription_model VARCHAR(80);

-- 미팅 일자(회의가 열린 날짜, 선택)
ALTER TABLE meeting_ai_meetings ADD COLUMN IF NOT EXISTS meeting_date DATE;

-- 회의록 생성 후 체크리스트 자동 추출(JSON 스냅샷, 업무 체크리스트 AI 연동)
ALTER TABLE meeting_ai_meetings ADD COLUMN IF NOT EXISTS checklist_snapshot JSONB;

-- 업무 체크리스트 툴팁용 짧은 요약(생성 시 회의록 본문에서 추출해 저장, 없으면 조회 시 추출)
ALTER TABLE meeting_ai_meetings ADD COLUMN IF NOT EXISTS summary_text TEXT;

CREATE OR REPLACE FUNCTION set_meeting_ai_prompts_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = NOW();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trg_meeting_ai_prompts_updated_at ON meeting_ai_prompts;
CREATE TRIGGER trg_meeting_ai_prompts_updated_at
BEFORE UPDATE ON meeting_ai_prompts
FOR EACH ROW
EXECUTE FUNCTION set_meeting_ai_prompts_updated_at();

CREATE OR REPLACE FUNCTION set_meeting_ai_meetings_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = NOW();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trg_meeting_ai_meetings_updated_at ON meeting_ai_meetings;
CREATE TRIGGER trg_meeting_ai_meetings_updated_at
BEFORE UPDATE ON meeting_ai_meetings
FOR EACH ROW
EXECUTE FUNCTION set_meeting_ai_meetings_updated_at();

-- 업무 체크리스트 AI: 사용자별 항목(회의록에서 가져오기 또는 수동)
CREATE TABLE IF NOT EXISTS meeting_ai_checklist_items (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_email VARCHAR(320) NOT NULL REFERENCES meeting_ai_users(email) ON DELETE CASCADE,
  meeting_id UUID REFERENCES meeting_ai_meetings(id) ON DELETE SET NULL,
  title TEXT NOT NULL,
  detail TEXT,
  assignee VARCHAR(300),
  due_note VARCHAR(300),
  completed BOOLEAN NOT NULL DEFAULT false,
  completed_at TIMESTAMPTZ,
  completion_note TEXT,
  sort_order INT NOT NULL DEFAULT 0,
  source VARCHAR(20) NOT NULL DEFAULT 'imported' CHECK (source IN ('imported', 'manual')),
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

ALTER TABLE meeting_ai_checklist_items ADD COLUMN IF NOT EXISTS completion_note TEXT;

CREATE INDEX IF NOT EXISTS idx_meeting_ai_checklist_user_updated ON meeting_ai_checklist_items (user_email, updated_at DESC);
CREATE INDEX IF NOT EXISTS idx_meeting_ai_checklist_meeting ON meeting_ai_checklist_items (meeting_id);

CREATE OR REPLACE FUNCTION set_meeting_ai_checklist_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = NOW();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trg_meeting_ai_checklist_updated_at ON meeting_ai_checklist_items;
CREATE TRIGGER trg_meeting_ai_checklist_updated_at
BEFORE UPDATE ON meeting_ai_checklist_items
FOR EACH ROW
EXECUTE FUNCTION set_meeting_ai_checklist_updated_at();

-- PPT 썸네일 작업 이벤트 로그 (기존 data/thumbnail-events.json 대체)
CREATE TABLE IF NOT EXISTS lecture_thumbnail_events (
  id UUID PRIMARY KEY,
  occurred_at TIMESTAMPTZ NOT NULL,
  event_type VARCHAR(40) NOT NULL,
  lecture_id UUID,
  lecture_title TEXT,
  reason VARCHAR(200),
  force_flag BOOLEAN NOT NULL DEFAULT false,
  queue_size_after INTEGER,
  retry_count INTEGER,
  duration_ms INTEGER,
  error_text TEXT
);

CREATE INDEX IF NOT EXISTS idx_lecture_thumbnail_events_occurred ON lecture_thumbnail_events (occurred_at DESC);
CREATE INDEX IF NOT EXISTS idx_lecture_thumbnail_events_type ON lecture_thumbnail_events (event_type);
CREATE INDEX IF NOT EXISTS idx_lecture_thumbnail_events_lecture ON lecture_thumbnail_events (lecture_id);