// Simplified coefficients for Low-Rise Buildings (Envelope Procedure)
// Based on ASCE 7-22 Figure 28.3-1 (Case 1 & 2)

export const getGCpf = (
    zone: string,
    _angleDeg: number, // unused for now in this simplified lookup
    caseType: '1' | '2' | '3' | '4' = '1'
): number => {
    // Note: ASCE 7 Figure 28.3-1
    // Case 1 (Transverse) vs Case 2 (Longitudinal)
    // Case 3 & 4 are Torsional (modifications of 1 & 2)

    // Screenshot values suggest:
    // Zone 1 Case 1: GCpf = 0.40
    // Zone 1 Case 2: GCpf = -0.45

    if (caseType === '1' || caseType === '3') {
        // Transverse (Case 1) or Torsional A (Case 3 based on 1)
        switch (zone) {
            case '1': return 0.40;
            case '2': return -0.69;
            case '3': return -0.37;
            case '4': return -0.29;
            case '5': return 0; // Not typ. in Case 1? Actually depends on loading direction.
            case '6': return 0;
            case '1E': return 0.61;
            case '2E': return -1.07;
            case '3E': return -0.53;
            case '4E': return -0.48;
            case '5E': return 0;
            case '6E': return 0;

            // Torsional zones often suffix T, e.g., 1T, 2T. 
            // ASCE 28.3.4: "Torsional load cases... pressures shall be equal to 25% of... Zones 1-6"? No.
            // "Case 3... applies defined wind pressures... while simultaneously applying 25%..."
            // Actually usually simplified to specific factors.
            // Let's assume standard lookup for now.
            case '1T': return 0.40; // Base value, handled in calc logic for reduction
            case '2T': return -0.69;
            case '3T': return -0.37;
            case '4T': return -0.29;
            default: return 0;
        }
    } else {
        // Longitudinal (Case 2) or Torsional B (Case 4 based on 2)
        switch (zone) {
            case '1': return -0.45; // Based on screenshot
            case '2': return -0.69;
            case '3': return -0.37;
            case '4': return -0.45;
            case '5': return 0.40;
            case '6': return -0.29;

            case '1E': return -0.48; // Screenshot says -0.48 for 4E? Wait.
            // Let's rely on screenshot: Zone 1E Case 2 = -0.48
            // Screenshot "Case 2":
            // 1: -16.8, 1E: -17.5.
            // 2: -23.2 (-0.69)
            // 3: -14.7 (-0.37)
            // 4: -16.8 (-0.45)
            // 5: 5.9 (0.40)
            // 6: -12.5 (-0.29)

            case '2E': return -1.07;
            case '3E': return -0.53;
            case '4E': return -0.48;
            case '5E': return 0.61;
            case '6E': return -0.43;
            default: return 0;
        }
    }
};

// C&C Coefficients (ASCE 7 Fig 30.3-1)
// Roof (Zone 1, 2, 3), Wall (Zone 4, 5)
// Simplified for Effective Area Ae = 100 ft2
export const getCCGCp = (
    component: 'Roof' | 'Wall',
    zone: string
): { pos: number, neg: number } => {
    if (component === 'Roof') {
        // Zone 1, 2, 3
        switch (zone) {
            case '1': return { pos: 0.2, neg: -1.29 }; // Screenshot: 1.2,3 (+) = 0.20, 1(-) = -1.29
            case '2': return { pos: 0.2, neg: -1.77 }; // 2(-) = -1.77
            case '3': return { pos: 0.2, neg: -2.14 }; // 3(-) = -2.14
            default: return { pos: 0, neg: 0 };
        }
    } else {
        // Wall (Zone 4, 5)
        switch (zone) {
            case '4': return { pos: 0.74, neg: -0.83 }; // 4(+) = 0.74, 4(-) = -0.83
            case '5': return { pos: 0.74, neg: -0.94 }; // 5(+) = 0.74, 5(-) = -0.94
            default: return { pos: 0, neg: 0 };
        }
    }
};