package alphametics

// Source: exercism/problem-specifications
// Commit: a86a774 alphametics: apply input policy to final test case
// Problem Specifications Version: 1.2.0

// Solve the alphametics puzzle
var testCases = []struct {
	description   string
	input         string
	expected      map[string]int
	errorExpected bool
}{
	{
		description: "puzzle with three letters",
		input:       "I + BB == ILL",
		expected:    map[string]int{"B": 9, "I": 1, "L": 0},
	},
	{
		description:   "solution must have unique value for each letter",
		input:         "A == B",
		errorExpected: true,
	},
	{
		description:   "leading zero solution is invalid",
		input:         "ACA + DD == BD",
		errorExpected: true,
	},
	{
		description: "puzzle with four letters",
		input:       "AS + A == MOM",
		expected:    map[string]int{"A": 9, "M": 1, "O": 0, "S": 2},
	},
	{
		description: "puzzle with six letters",
		input:       "NO + NO + TOO == LATE",
		expected:    map[string]int{"A": 0, "E": 2, "L": 1, "N": 7, "O": 4, "T": 9},
	},
	{
		description: "puzzle with seven letters",
		input:       "HE + SEES + THE == LIGHT",
		expected:    map[string]int{"E": 4, "G": 2, "H": 5, "I": 0, "L": 1, "S": 9, "T": 7},
	},
	{
		description: "puzzle with eight letters",
		input:       "SEND + MORE == MONEY",
		expected:    map[string]int{"D": 7, "E": 5, "M": 1, "N": 6, "O": 0, "R": 8, "S": 9, "Y": 2},
	},
	{
		description: "puzzle with ten letters",
		input:       "AND + A + STRONG + OFFENSE + AS + A + GOOD == DEFENSE",
		expected:    map[string]int{"A": 5, "D": 3, "E": 4, "F": 7, "G": 8, "N": 0, "O": 2, "R": 1, "S": 6, "T": 9},
	},
	{
		description: "puzzle with ten letters and 199 addends",
		input:       "THIS + A + FIRE + THEREFORE + FOR + ALL + HISTORIES + I + TELL + A + TALE + THAT + FALSIFIES + ITS + TITLE + TIS + A + LIE + THE + TALE + OF + THE + LAST + FIRE + HORSES + LATE + AFTER + THE + FIRST + FATHERS + FORESEE + THE + HORRORS + THE + LAST + FREE + TROLL + TERRIFIES + THE + HORSES + OF + FIRE + THE + TROLL + RESTS + AT + THE + HOLE + OF + LOSSES + IT + IS + THERE + THAT + SHE + STORES + ROLES + OF + LEATHERS + AFTER + SHE + SATISFIES + HER + HATE + OFF + THOSE + FEARS + A + TASTE + RISES + AS + SHE + HEARS + THE + LEAST + FAR + HORSE + THOSE + FAST + HORSES + THAT + FIRST + HEAR + THE + TROLL + FLEE + OFF + TO + THE + FOREST + THE + HORSES + THAT + ALERTS + RAISE + THE + STARES + OF + THE + OTHERS + AS + THE + TROLL + ASSAILS + AT + THE + TOTAL + SHIFT + HER + TEETH + TEAR + HOOF + OFF + TORSO + AS + THE + LAST + HORSE + FORFEITS + ITS + LIFE + THE + FIRST + FATHERS + HEAR + OF + THE + HORRORS + THEIR + FEARS + THAT + THE + FIRES + FOR + THEIR + FEASTS + ARREST + AS + THE + FIRST + FATHERS + RESETTLE + THE + LAST + OF + THE + FIRE + HORSES + THE + LAST + TROLL + HARASSES + THE + FOREST + HEART + FREE + AT + LAST + OF + THE + LAST + TROLL + ALL + OFFER + THEIR + FIRE + HEAT + TO + THE + ASSISTERS + FAR + OFF + THE + TROLL + FASTS + ITS + LIFE + SHORTER + AS + STARS + RISE + THE + HORSES + REST + SAFE + AFTER + ALL + SHARE + HOT + FISH + AS + THEIR + AFFILIATES + TAILOR + A + ROOFS + FOR + THEIR + SAFE == FORTRESSES",
		expected:    map[string]int{"A": 1, "E": 0, "F": 5, "H": 8, "I": 7, "L": 2, "O": 6, "R": 3, "S": 4, "T": 9},
	},
}