-- =========================================================================
-- Migration 016: Pipeline Opportunities (Hub-local)
-- =========================================================================

CREATE TABLE IF NOT EXISTS pipeline_stages (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    sort_order INTEGER NOT NULL DEFAULT 0,
    default_probability INTEGER NOT NULL DEFAULT 0,
    color VARCHAR(20) DEFAULT '#0f4c75',
    is_won BOOLEAN DEFAULT FALSE,
    is_lost BOOLEAN DEFAULT FALSE,
    is_active BOOLEAN DEFAULT TRUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS pipeline_opportunities (
    id SERIAL PRIMARY KEY,
    customer_id INTEGER NOT NULL REFERENCES customers(id) ON DELETE CASCADE,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    amount NUMERIC(12, 2) DEFAULT 0,
    currency VARCHAR(10) DEFAULT 'DKK',
    expected_close_date DATE,
    stage_id INTEGER NOT NULL REFERENCES pipeline_stages(id),
    probability INTEGER NOT NULL DEFAULT 0,
    owner_user_id INTEGER REFERENCES users(user_id) ON DELETE SET NULL,
    is_active BOOLEAN DEFAULT TRUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS pipeline_stage_history (
    id SERIAL PRIMARY KEY,
    opportunity_id INTEGER NOT NULL REFERENCES pipeline_opportunities(id) ON DELETE CASCADE,
    from_stage_id INTEGER REFERENCES pipeline_stages(id),
    to_stage_id INTEGER NOT NULL REFERENCES pipeline_stages(id),
    changed_by_user_id INTEGER REFERENCES users(user_id) ON DELETE SET NULL,
    note TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_pipeline_opportunities_customer_id ON pipeline_opportunities(customer_id);
CREATE INDEX IF NOT EXISTS idx_pipeline_opportunities_stage_id ON pipeline_opportunities(stage_id);
CREATE INDEX IF NOT EXISTS idx_pipeline_stage_history_opportunity_id ON pipeline_stage_history(opportunity_id);

-- Seed default stages (Option B)
INSERT INTO pipeline_stages (name, description, sort_order, default_probability, color, is_won, is_lost)
SELECT * FROM (VALUES
    ('Ny', 'Ny mulighed', 1, 10, '#0f4c75', FALSE, FALSE),
    ('Afklaring', 'Kvalificering og behov', 2, 25, '#1b6ca8', FALSE, FALSE),
    ('Tilbud', 'Tilbud er sendt', 3, 50, '#3282b8', FALSE, FALSE),
    ('Commit', 'Forhandling og commit', 4, 75, '#5b8c5a', FALSE, FALSE),
    ('Vundet', 'Lukket som vundet', 5, 100, '#2f9e44', TRUE, FALSE),
    ('Tabt', 'Lukket som tabt', 6, 0, '#d9480f', FALSE, TRUE)
) AS v(name, description, sort_order, default_probability, color, is_won, is_lost)
WHERE NOT EXISTS (SELECT 1 FROM pipeline_stages);