-- ============================================
-- MIGRATION: project_flock_populations
-- ============================================

-- STEP 1: Hapus tabel jika sudah ada
DROP TABLE IF EXISTS project_flock_populations;

-- STEP 2: Buat tabel project_flock_populations
CREATE TABLE IF NOT EXISTS project_flock_populations (
    id BIGSERIAL PRIMARY KEY,
    project_chickin_id BIGINT NOT NULL,
    product_warehouse_id BIGINT NOT NULL,
    total_qty NUMERIC(15, 3) NOT NULL,
    total_used_qty NUMERIC(15, 3) DEFAULT 0,
    notes TEXT,
    created_by BIGINT NOT NULL,
    created_at TIMESTAMPTZ DEFAULT now(),
    updated_at TIMESTAMPTZ DEFAULT now(),
    deleted_at TIMESTAMPTZ
);

-- STEP 3: FOREIGN KEYS
BEGIN;

-- Relasi ke project_chickins
ALTER TABLE project_flock_populations
ADD CONSTRAINT fk_project_flock_populations_chickin FOREIGN KEY (project_chickin_id) REFERENCES project_chickins (id) ON DELETE RESTRICT ON UPDATE CASCADE;

-- Relasi ke product_warehouses
ALTER TABLE project_flock_populations
ADD CONSTRAINT fk_project_flock_populations_warehouse FOREIGN KEY (product_warehouse_id) REFERENCES product_warehouses (id) ON DELETE RESTRICT ON UPDATE CASCADE;

-- Relasi ke users
ALTER TABLE project_flock_populations
ADD CONSTRAINT fk_project_flock_populations_created_by FOREIGN KEY (created_by) REFERENCES users (id) ON DELETE RESTRICT ON UPDATE CASCADE;

COMMIT;

-- STEP 4: INDEXES
CREATE INDEX IF NOT EXISTS idx_populations_chickin_id ON project_flock_populations (project_chickin_id)
WHERE
    deleted_at IS NULL;

CREATE INDEX IF NOT EXISTS idx_populations_warehouse_id ON project_flock_populations (product_warehouse_id)
WHERE
    deleted_at IS NULL;

CREATE INDEX IF NOT EXISTS idx_populations_created_by ON project_flock_populations (created_by);

-- Composite index for common queries
CREATE INDEX IF NOT EXISTS idx_populations_chickin_deleted ON project_flock_populations (
    project_chickin_id,
    deleted_at
);

-- Index for soft delete queries
CREATE INDEX IF NOT EXISTS idx_populations_deleted_at ON project_flock_populations (deleted_at);

-- Unique constraint: one population per chickin
CREATE UNIQUE INDEX IF NOT EXISTS idx_populations_chickin_unique ON project_flock_populations (project_chickin_id)
WHERE
    deleted_at IS NULL;