-- AP1.4b: Gate-Checkliste (Prüfplan pro RoadmapItem)

CREATE TABLE roadmap_item_criteria (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
    roadmap_item_id UUID NOT NULL REFERENCES roadmap_items(id) ON DELETE CASCADE,
    sort_order INT NOT NULL DEFAULT 0,
    title TEXT NOT NULL,
    description TEXT NOT NULL DEFAULT '',
    criterion_kind VARCHAR(32) NOT NULL DEFAULT 'evidence_required'
        CHECK (criterion_kind IN ('manual', 'evidence_required', 'review_required', 'metric')),
    verification_hint TEXT NOT NULL DEFAULT '',
    status VARCHAR(32) NOT NULL DEFAULT 'open'
        CHECK (status IN ('open', 'satisfied', 'waived', 'deferred', 'failed')),
    waived_or_deferred_decision_id UUID NULL REFERENCES decisions(id) ON DELETE SET NULL,
    satisfied_by_evidence_id UUID NULL REFERENCES evidence(id) ON DELETE SET NULL,
    satisfied_at TIMESTAMPTZ NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_roadmap_criteria_item ON roadmap_item_criteria(tenant_id, roadmap_item_id);
CREATE INDEX idx_roadmap_criteria_status ON roadmap_item_criteria(tenant_id, status);

-- Compat: Default-Kriterium pro bestehendem Plan-Element
INSERT INTO roadmap_item_criteria (
    tenant_id, roadmap_item_id, sort_order, title, description, criterion_kind, status
)
SELECT
    ri.tenant_id,
    ri.id,
    0,
    'Gate allgemein',
    COALESCE(NULLIF(ri.goal_description, ''), 'Akzeptierter Nachweis oder abgeschlossenes Review am Plan-Element.'),
    'evidence_required',
    'open'
FROM roadmap_items ri;

-- Bereits vorhandene accepted Evidence → Default-Kriterium satisfied
UPDATE roadmap_item_criteria ric
SET
    status = 'satisfied',
    satisfied_at = NOW(),
    satisfied_by_evidence_id = sub.evidence_id
FROM (
    SELECT DISTINCT ON (ric2.id)
        ric2.id AS criterion_id,
        e.id AS evidence_id
    FROM roadmap_item_criteria ric2
    JOIN evidence e
        ON e.tenant_id = ric2.tenant_id
       AND e.roadmap_item_id = ric2.roadmap_item_id
       AND e.status = 'accepted'
    WHERE ric2.title = 'Gate allgemein'
    ORDER BY ric2.id, e.updated_at DESC
) sub
WHERE ric.id = sub.criterion_id;

-- Bereits reached Gates ohne Evidence: Review completed
UPDATE roadmap_item_criteria ric
SET status = 'satisfied', satisfied_at = NOW()
FROM roadmap_items ri
WHERE ric.roadmap_item_id = ri.id
  AND ric.tenant_id = ri.tenant_id
  AND ric.title = 'Gate allgemein'
  AND ric.status = 'open'
  AND ri.status = 'reached'
  AND EXISTS (
      SELECT 1 FROM reviews rev
      WHERE rev.tenant_id = ri.tenant_id
        AND rev.initiative_id IN (
            SELECT r.initiative_id FROM roadmaps r WHERE r.id = ri.roadmap_id
        )
        AND rev.status = 'completed'
        AND (rev.roadmap_item_id = ri.id OR rev.milestone_id = ri.id)
  );