-- Migration 025: Reifegradmodell-Kontext als M:N (Fokusbereich, Stilrichtung, Zielgruppe)
-- + Bootstrap: ein Modell aus allen importierten Skills (Wiki / Migration 023)
-- Datum: 2026-04-27

-- ============================================================================
-- JUNCTION TABLES
-- ============================================================================

CREATE TABLE IF NOT EXISTS maturity_model_focus_areas (
    id SERIAL PRIMARY KEY,
    maturity_model_id INT NOT NULL REFERENCES maturity_models(id) ON DELETE CASCADE,
    focus_area_id     INT NOT NULL REFERENCES focus_areas(id) ON DELETE CASCADE,
    is_primary        BOOLEAN DEFAULT false,
    created_at        TIMESTAMP DEFAULT NOW(),
    UNIQUE (maturity_model_id, focus_area_id)
);

CREATE INDEX IF NOT EXISTS idx_mmfa_model ON maturity_model_focus_areas(maturity_model_id);
CREATE INDEX IF NOT EXISTS idx_mmfa_focus ON maturity_model_focus_areas(focus_area_id);

CREATE TABLE IF NOT EXISTS maturity_model_style_directions (
    id SERIAL PRIMARY KEY,
    maturity_model_id   INT NOT NULL REFERENCES maturity_models(id) ON DELETE CASCADE,
    style_direction_id  INT NOT NULL REFERENCES style_directions(id) ON DELETE CASCADE,
    is_primary          BOOLEAN DEFAULT false,
    created_at          TIMESTAMP DEFAULT NOW(),
    UNIQUE (maturity_model_id, style_direction_id)
);

CREATE INDEX IF NOT EXISTS idx_mmsd_model ON maturity_model_style_directions(maturity_model_id);
CREATE INDEX IF NOT EXISTS idx_mmsd_style ON maturity_model_style_directions(style_direction_id);

CREATE TABLE IF NOT EXISTS maturity_model_target_groups (
    id SERIAL PRIMARY KEY,
    maturity_model_id INT NOT NULL REFERENCES maturity_models(id) ON DELETE CASCADE,
    target_group_id   INT NOT NULL REFERENCES target_groups(id) ON DELETE CASCADE,
    is_primary        BOOLEAN DEFAULT false,
    created_at        TIMESTAMP DEFAULT NOW(),
    UNIQUE (maturity_model_id, target_group_id)
);

CREATE INDEX IF NOT EXISTS idx_mmtg_model ON maturity_model_target_groups(maturity_model_id);
CREATE INDEX IF NOT EXISTS idx_mmtg_tg ON maturity_model_target_groups(target_group_id);

-- ============================================================================
-- Daten aus 1:1-FKs übernehmen (falls Spalten noch existieren), dann FK-Spalten entfernen
-- ============================================================================

DO $$
BEGIN
    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'maturity_models' AND column_name = 'focus_area_id'
    ) THEN
        INSERT INTO maturity_model_focus_areas (maturity_model_id, focus_area_id, is_primary)
        SELECT id, focus_area_id, true
        FROM maturity_models
        WHERE focus_area_id IS NOT NULL
        ON CONFLICT (maturity_model_id, focus_area_id) DO NOTHING;
    END IF;

    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'maturity_models' AND column_name = 'style_direction_id'
    ) THEN
        INSERT INTO maturity_model_style_directions (maturity_model_id, style_direction_id, is_primary)
        SELECT id, style_direction_id, true
        FROM maturity_models
        WHERE style_direction_id IS NOT NULL
        ON CONFLICT (maturity_model_id, style_direction_id) DO NOTHING;
    END IF;

    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'maturity_models' AND column_name = 'target_group_id'
    ) THEN
        INSERT INTO maturity_model_target_groups (maturity_model_id, target_group_id, is_primary)
        SELECT id, target_group_id, true
        FROM maturity_models
        WHERE target_group_id IS NOT NULL
        ON CONFLICT (maturity_model_id, target_group_id) DO NOTHING;
    END IF;
END $$;

ALTER TABLE maturity_models DROP CONSTRAINT IF EXISTS maturity_models_context_name_unique;

ALTER TABLE maturity_models DROP COLUMN IF EXISTS focus_area_id;
ALTER TABLE maturity_models DROP COLUMN IF EXISTS style_direction_id;
ALTER TABLE maturity_models DROP COLUMN IF EXISTS target_group_id;

CREATE UNIQUE INDEX IF NOT EXISTS idx_maturity_models_wiki_import
    ON maturity_models(import_source, import_id)
    WHERE import_id IS NOT NULL;

-- ============================================================================
-- Bootstrap: Standard-Modell für alle Skills aus der Wiki-Matrix (Migration 023)
-- ============================================================================

DO $$
DECLARE
    mid INT;
    n_skills INT;
BEGIN
    SELECT COUNT(*) INTO n_skills FROM skills;
    IF n_skills = 0 THEN
        RAISE NOTICE 'Bootstrap: keine Skills – übersprungen';
        RETURN;
    END IF;

    SELECT id INTO mid FROM maturity_models WHERE import_id = 'faehigkeitsmatrix_karatetrainer' LIMIT 1;
    IF mid IS NOT NULL THEN
        RAISE NOTICE 'Bootstrap: Modell bereits vorhanden (id=%)', mid;
        RETURN;
    END IF;

    INSERT INTO maturity_models (name, description, level_count, status, import_source, import_id, version)
    VALUES (
        'Fähigkeitsmatrix (Wiki Import)',
        'Alle Fähigkeiten aus der Wiki-Matrix (Karatetrainer). Haupt- und Untergruppen kommen aus skill_main_categories / skill_categories.',
        5,
        'active',
        'wiki_matrix',
        'faehigkeitsmatrix_karatetrainer',
        '1.0'
    )
    RETURNING id INTO mid;

    INSERT INTO maturity_model_focus_areas (maturity_model_id, focus_area_id, is_primary)
    SELECT mid, fa.id, (fa.name = 'Karate')
    FROM focus_areas fa
    WHERE fa.name IN ('Karate', 'Selbstverteidigung', 'Gewaltschutz')
    ON CONFLICT (maturity_model_id, focus_area_id) DO NOTHING;

    INSERT INTO model_levels (maturity_model_id, level_number, name, description, sort_order)
    VALUES
        (mid, 1, 'Einsteiger', NULL, 1),
        (mid, 2, 'Grundlagen', NULL, 2),
        (mid, 3, 'Aufbau', NULL, 3),
        (mid, 4, 'Fortgeschritten', NULL, 4),
        (mid, 5, 'Experte', NULL, 5);

    INSERT INTO model_skills (maturity_model_id, skill_id, sort_order, relevance)
    SELECT
        mid,
        s.id,
        ROW_NUMBER() OVER (
            ORDER BY mc.sort_order NULLS LAST, sc.sort_order NULLS LAST, s.name
        ),
        NULL
    FROM skills s
    LEFT JOIN skill_categories sc ON s.category_id = sc.id
    LEFT JOIN skill_main_categories mc ON s.main_category_id = mc.id;

    INSERT INTO model_skill_levels (maturity_model_id, skill_id, level_number, description, observable_criteria)
    SELECT mid, sld.skill_id, sld.level, sld.description, NULL
    FROM skill_level_definitions sld
    ON CONFLICT (maturity_model_id, skill_id, level_number) DO NOTHING;

    RAISE NOTICE 'Bootstrap: Reifegradmodell id=% angelegt (% Skills)', mid, n_skills;
END $$;