-- 021_add_5_photo_support.sql
-- 5장 사진 지원을 위한 추가 컬럼들
-- 작성일: 2025-11-08
-- 목적: photo_path3, photo_path4, photo_path5 및 completion_photo_path2~5 컬럼 추가

BEGIN;

DO $$
DECLARE
    migration_name VARCHAR(255) := '021_add_5_photo_support.sql';
    migration_notes TEXT := '5장 사진 지원: photo_path3~5, completion_photo_path2~5 컬럼 추가';
    current_status VARCHAR(50);
BEGIN
    -- migration_log 테이블이 없으면 생성 (멱등성)
    CREATE TABLE IF NOT EXISTS migration_log (
        id SERIAL PRIMARY KEY,
        migration_file VARCHAR(255) NOT NULL UNIQUE,
        executed_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
        status VARCHAR(50),
        notes TEXT,
        created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
        started_at TIMESTAMP WITH TIME ZONE,
        completed_at TIMESTAMP WITH TIME ZONE
    );

    SELECT status INTO current_status FROM migration_log WHERE migration_file = migration_name;

    IF current_status IS NULL THEN
        RAISE NOTICE '--- 마이그레이션 % 시작 ---', migration_name;

        -- 기본 사진 경로 3~5 추가
        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'photo_path3') THEN
            ALTER TABLE issues ADD COLUMN photo_path3 VARCHAR(500);
            RAISE NOTICE '✅ issues.photo_path3 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.photo_path3 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'photo_path4') THEN
            ALTER TABLE issues ADD COLUMN photo_path4 VARCHAR(500);
            RAISE NOTICE '✅ issues.photo_path4 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.photo_path4 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'photo_path5') THEN
            ALTER TABLE issues ADD COLUMN photo_path5 VARCHAR(500);
            RAISE NOTICE '✅ issues.photo_path5 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.photo_path5 컬럼이 이미 존재합니다.';
        END IF;

        -- 완료 사진 경로 2~5 추가
        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_photo_path2') THEN
            ALTER TABLE issues ADD COLUMN completion_photo_path2 VARCHAR(500);
            RAISE NOTICE '✅ issues.completion_photo_path2 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_photo_path2 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_photo_path3') THEN
            ALTER TABLE issues ADD COLUMN completion_photo_path3 VARCHAR(500);
            RAISE NOTICE '✅ issues.completion_photo_path3 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_photo_path3 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_photo_path4') THEN
            ALTER TABLE issues ADD COLUMN completion_photo_path4 VARCHAR(500);
            RAISE NOTICE '✅ issues.completion_photo_path4 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_photo_path4 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_photo_path5') THEN
            ALTER TABLE issues ADD COLUMN completion_photo_path5 VARCHAR(500);
            RAISE NOTICE '✅ issues.completion_photo_path5 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_photo_path5 컬럼이 이미 존재합니다.';
        END IF;

        -- 추가 필드들 (최신 버전에서 필요한 것들)
        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_rejected_at') THEN
            ALTER TABLE issues ADD COLUMN completion_rejected_at TIMESTAMP WITH TIME ZONE;
            RAISE NOTICE '✅ issues.completion_rejected_at 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_rejected_at 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_rejected_by_id') THEN
            ALTER TABLE issues ADD COLUMN completion_rejected_by_id INTEGER REFERENCES users(id);
            RAISE NOTICE '✅ issues.completion_rejected_by_id 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_rejected_by_id 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'completion_rejection_reason') THEN
            ALTER TABLE issues ADD COLUMN completion_rejection_reason TEXT;
            RAISE NOTICE '✅ issues.completion_rejection_reason 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.completion_rejection_reason 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'last_exported_at') THEN
            ALTER TABLE issues ADD COLUMN last_exported_at TIMESTAMP WITH TIME ZONE;
            RAISE NOTICE '✅ issues.last_exported_at 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.last_exported_at 컬럼이 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'issues' AND column_name = 'export_count') THEN
            ALTER TABLE issues ADD COLUMN export_count INTEGER DEFAULT 0;
            RAISE NOTICE '✅ issues.export_count 컬럼이 추가되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ issues.export_count 컬럼이 이미 존재합니다.';
        END IF;

        -- 인덱스 추가 (성능 향상)
        IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE tablename = 'issues' AND indexname = 'idx_issues_photo_path3') THEN
            CREATE INDEX idx_issues_photo_path3 ON issues (photo_path3) WHERE photo_path3 IS NOT NULL;
            RAISE NOTICE '✅ idx_issues_photo_path3 인덱스가 생성되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ idx_issues_photo_path3 인덱스가 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE tablename = 'issues' AND indexname = 'idx_issues_photo_path4') THEN
            CREATE INDEX idx_issues_photo_path4 ON issues (photo_path4) WHERE photo_path4 IS NOT NULL;
            RAISE NOTICE '✅ idx_issues_photo_path4 인덱스가 생성되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ idx_issues_photo_path4 인덱스가 이미 존재합니다.';
        END IF;

        IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE tablename = 'issues' AND indexname = 'idx_issues_photo_path5') THEN
            CREATE INDEX idx_issues_photo_path5 ON issues (photo_path5) WHERE photo_path5 IS NOT NULL;
            RAISE NOTICE '✅ idx_issues_photo_path5 인덱스가 생성되었습니다.';
        ELSE
            RAISE NOTICE 'ℹ️ idx_issues_photo_path5 인덱스가 이미 존재합니다.';
        END IF;

        -- 마이그레이션 검증
        DECLARE
            col_count INTEGER;
            idx_count INTEGER;
        BEGIN
            SELECT COUNT(*) INTO col_count FROM information_schema.columns 
            WHERE table_name = 'issues' AND column_name IN (
                'photo_path3', 'photo_path4', 'photo_path5',
                'completion_photo_path2', 'completion_photo_path3', 'completion_photo_path4', 'completion_photo_path5',
                'completion_rejected_at', 'completion_rejected_by_id', 'completion_rejection_reason',
                'last_exported_at', 'export_count'
            );
            
            SELECT COUNT(*) INTO idx_count FROM pg_indexes 
            WHERE tablename = 'issues' AND indexname IN (
                'idx_issues_photo_path3', 'idx_issues_photo_path4', 'idx_issues_photo_path5'
            );

            RAISE NOTICE '=== 마이그레이션 검증 결과 ===';
            RAISE NOTICE '추가된 컬럼: %/11개', col_count;
            RAISE NOTICE '생성된 인덱스: %/3개', idx_count;

            IF col_count = 11 AND idx_count = 3 THEN
                RAISE NOTICE '✅ 마이그레이션이 성공적으로 완료되었습니다!';
                INSERT INTO migration_log (migration_file, status, notes, completed_at) VALUES (migration_name, 'SUCCESS', migration_notes, NOW());
            ELSE
                RAISE EXCEPTION '❌ 마이그레이션 검증 실패!';
            END IF;
        END;

    ELSIF current_status = 'SUCCESS' THEN
        RAISE NOTICE 'ℹ️ 마이그레이션 %는 이미 성공적으로 실행되었습니다. 스킵합니다.', migration_name;
    ELSE
        RAISE NOTICE '⚠️ 마이그레이션 %는 이전에 실패했습니다. 수동 확인이 필요합니다.', migration_name;
    END IF;
END $$;

COMMIT;