ALTER TABLE webhook_templates
    ADD COLUMN IF NOT EXISTS version INT NOT NULL DEFAULT 1;

ALTER TABLE webhook_templates
    ADD COLUMN IF NOT EXISTS signing_secret TEXT NOT NULL DEFAULT '';

ALTER TABLE webhook_templates
    ADD COLUMN IF NOT EXISTS max_retries INT NOT NULL DEFAULT 3;

ALTER TABLE webhook_templates
    DROP CONSTRAINT IF EXISTS webhook_templates_max_retries_chk;

ALTER TABLE webhook_templates
    ADD CONSTRAINT webhook_templates_max_retries_chk
    CHECK (max_retries >= 0 AND max_retries <= 10) NOT VALID;

CREATE TABLE IF NOT EXISTS webhook_template_versions (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    template_id UUID NOT NULL REFERENCES webhook_templates(id) ON DELETE CASCADE,
    version INT NOT NULL,
    method TEXT NOT NULL DEFAULT 'POST',
    headers JSONB NOT NULL DEFAULT '{}',
    body_template TEXT NOT NULL DEFAULT '',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(template_id, version)
);

INSERT INTO webhook_template_versions (template_id, version, method, headers, body_template)
SELECT wt.id, wt.version, wt.method, wt.headers, wt.body_template
FROM webhook_templates wt
WHERE NOT EXISTS (
    SELECT 1
    FROM webhook_template_versions wtv
    WHERE wtv.template_id = wt.id
      AND wtv.version = wt.version
);

ALTER TABLE webhook_logs
    ADD COLUMN IF NOT EXISTS attempt_count INT NOT NULL DEFAULT 1;

ALTER TABLE webhook_logs
    ADD COLUMN IF NOT EXISTS payload_preview TEXT NOT NULL DEFAULT '';

ALTER TABLE webhook_logs
    ADD COLUMN IF NOT EXISTS payload_truncated BOOLEAN NOT NULL DEFAULT false;

CREATE TABLE IF NOT EXISTS webhook_dead_letters (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    template_id UUID NOT NULL REFERENCES webhook_templates(id) ON DELETE CASCADE,
    message_id UUID REFERENCES messages(id) ON DELETE SET NULL,
    attempt_count INT NOT NULL DEFAULT 0,
    last_status_code INT NOT NULL DEFAULT 0,
    error TEXT NOT NULL DEFAULT '',
    payload_preview TEXT NOT NULL DEFAULT '',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_webhook_dead_letters_template
    ON webhook_dead_letters(template_id, created_at DESC);