CREATE TABLE IF NOT EXISTS release_executions (
    id VARCHAR(36) PRIMARY KEY,
    release_batch_id VARCHAR(36) NOT NULL
        REFERENCES release_batches(id) ON DELETE RESTRICT,
    operation VARCHAR(16) NOT NULL
        CHECK (operation IN ('publish', 'rollback')),
    prior_execution_id VARCHAR(36)
        REFERENCES release_executions(id) ON DELETE RESTRICT,
    state VARCHAR(16) NOT NULL DEFAULT 'pending'
        CHECK (state IN ('pending', 'running', 'completed', 'failed')),
    target_environment VARCHAR(16) NOT NULL DEFAULT 'production'
        CHECK (target_environment = 'production'),
    authorized_by VARCHAR(128) NOT NULL,
    authorization_code VARCHAR(64) NOT NULL,
    job_id VARCHAR(36) NOT NULL UNIQUE
        REFERENCES jobs(id) ON DELETE RESTRICT,
    manifest_sha256 CHAR(64) NOT NULL DEFAULT ''
        CHECK (manifest_sha256 = '' OR manifest_sha256 ~ '^[0-9a-f]{64}$'),
    item_count INTEGER NOT NULL DEFAULT 0 CHECK (item_count >= 0),
    completed_item_count INTEGER NOT NULL DEFAULT 0 CHECK (completed_item_count >= 0),
    failed_item_count INTEGER NOT NULL DEFAULT 0 CHECK (failed_item_count >= 0),
    error_code VARCHAR(64) NOT NULL DEFAULT '',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    started_at TIMESTAMPTZ,
    completed_at TIMESTAMPTZ,
    CHECK (operation = 'publish' OR prior_execution_id IS NOT NULL),
    CHECK (completed_item_count + failed_item_count <= item_count)
);

CREATE UNIQUE INDEX IF NOT EXISTS uq_release_publish_batch
    ON release_executions (release_batch_id)
    WHERE operation = 'publish';

CREATE UNIQUE INDEX IF NOT EXISTS uq_release_rollback_prior
    ON release_executions (prior_execution_id)
    WHERE operation = 'rollback';

CREATE INDEX IF NOT EXISTS idx_release_executions_batch_created
    ON release_executions (release_batch_id, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_release_executions_state_created
    ON release_executions (state, created_at);

CREATE TABLE IF NOT EXISTS release_item_executions (
    id VARCHAR(36) PRIMARY KEY,
    release_execution_id VARCHAR(36) NOT NULL
        REFERENCES release_executions(id) ON DELETE RESTRICT,
    publication_id VARCHAR(36) NOT NULL
        REFERENCES test_publications(id) ON DELETE RESTRICT,
    state VARCHAR(24) NOT NULL DEFAULT 'pending'
        CHECK (state IN ('pending', 'staged', 'activated', 'verified', 'failed', 'rolled_back')),
    bundle_sha256 CHAR(64) NOT NULL DEFAULT ''
        CHECK (bundle_sha256 = '' OR bundle_sha256 ~ '^[0-9a-f]{64}$'),
    previous_production_revision VARCHAR(128) NOT NULL DEFAULT '',
    production_revision VARCHAR(128) NOT NULL DEFAULT '',
    error_code VARCHAR(64) NOT NULL DEFAULT '',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    completed_at TIMESTAMPTZ,
    UNIQUE (release_execution_id, publication_id)
);

CREATE INDEX IF NOT EXISTS idx_release_item_executions_execution
    ON release_item_executions (release_execution_id, created_at);
CREATE INDEX IF NOT EXISTS idx_release_item_executions_publication
    ON release_item_executions (publication_id, created_at DESC);